{
  "name": "MailerSend",
  "slug": "mailersend",
  "website_url": "https://www.mailersend.com",
  "vendor_description": "MailerSend is a powerful transactional email system built for developers but designed so non-tech teams can contribute without coding.",
  "categories": [
    "email"
  ],
  "summary": "MailerSend is a transactional email platform built for developers but accessible to non-technical teams, also covering SMS, inbound routing, and email verification. The REST API uses API-key auth, webhooks, six SDKs, and an official MCP server. Pricing is published and self-serve with 500 emails/month free and paid plans from $7/month. It is GDPR and ISO 27001 compliant with a published SLA.",
  "capabilities": {
    "supported_actions": [
      "send_email",
      "send_bulk_email",
      "get_bulk_email_status",
      "send_sms",
      "schedule_email",
      "list_domains",
      "get_domain",
      "create_domain",
      "delete_domain",
      "update_domain_settings",
      "get_domain_dns_records",
      "verify_domain",
      "get_domain_recipients",
      "list_templates",
      "get_template",
      "create_template",
      "update_template",
      "delete_template",
      "list_recipients",
      "get_recipient",
      "delete_recipient",
      "list_blocklist",
      "list_hard_bounces",
      "list_spam_complaints",
      "list_unsubscribes",
      "list_on_hold_recipients",
      "add_to_blocklist",
      "add_to_hard_bounces",
      "add_to_spam_complaints",
      "add_to_unsubscribes",
      "delete_from_blocklist",
      "delete_from_hard_bounces",
      "delete_from_spam_complaints",
      "delete_from_unsubscribes",
      "delete_from_on_hold_list",
      "verify_single_email",
      "verify_email_async",
      "get_async_verification_status",
      "list_email_verifications",
      "get_email_verification",
      "verify_email_verification_list",
      "get_email_verification_results",
      "create_email_verification_list",
      "get_domain_activity",
      "get_activity_detail",
      "list_webhooks",
      "get_webhook",
      "create_webhook",
      "update_webhook",
      "delete_webhook",
      "list_sms_webhooks",
      "get_sms_webhook",
      "create_sms_webhook",
      "update_sms_webhook",
      "delete_sms_webhook",
      "list_inbound_routes",
      "get_inbound_route",
      "create_inbound_route",
      "update_inbound_route",
      "delete_inbound_route"
    ],
    "supported_regions": [
      "European Union"
    ],
    "supported_languages": [],
    "input_types": [
      "application/json",
      "SMTP relay",
      "Base64-encoded file attachments"
    ],
    "output_types": [
      "application/json"
    ],
    "webhooks_supported": true,
    "sandbox_available": false,
    "sdk_languages": [
      "Node.js",
      "PHP",
      "Python",
      "Go",
      "Ruby",
      "Java"
    ],
    "mcp_server_available": true
  },
  "integration": {
    "api_style": "rest",
    "base_url": "https://api.mailersend.com/v1/",
    "api_version": "v1",
    "versioning_scheme": "url",
    "stability": "ga",
    "deprecation_policy_url": null,
    "auth_methods": [
      "api_key"
    ],
    "auth_docs_url": "https://developers.mailersend.com/general",
    "idempotency_supported": null,
    "error_format": "vendor-specific",
    "webhook_signing": "hmac_sha256",
    "webhook_events_url": "https://developers.mailersend.com/api/v1/webhooks",
    "rate_limit_requests": 60,
    "rate_limit_window": "minute",
    "sdk_packages": [
      {
        "stars": 173,
        "package": "mailersend",
        "archived": false,
        "language": "Node.js",
        "official": true,
        "repo_url": "https://github.com/mailersend/mailersend-nodejs",
        "last_pushed_at": "2026-06-04T08:35:30Z"
      },
      {
        "stars": 83,
        "package": "mailersend/mailersend",
        "archived": false,
        "language": "PHP",
        "official": true,
        "repo_url": "https://github.com/mailersend/mailersend-php",
        "last_pushed_at": "2026-06-04T08:34:03Z"
      },
      {
        "stars": 69,
        "package": "mailersend",
        "archived": false,
        "language": "Python",
        "official": true,
        "repo_url": "https://github.com/mailersend/mailersend-python",
        "last_pushed_at": "2026-06-06T08:02:52Z"
      },
      {
        "stars": 36,
        "package": "github.com/mailersend/mailersend-go",
        "archived": false,
        "language": "Go",
        "official": true,
        "repo_url": "https://github.com/mailersend/mailersend-go",
        "last_pushed_at": "2026-04-13T12:10:31Z"
      },
      {
        "stars": 9,
        "package": "mailersend-ruby",
        "archived": false,
        "language": "Ruby",
        "official": true,
        "repo_url": "https://github.com/mailersend/mailersend-ruby",
        "last_pushed_at": "2026-04-24T16:23:52Z"
      },
      {
        "stars": 31,
        "package": "com.mailersend:java-sdk",
        "archived": false,
        "language": "Java",
        "official": true,
        "repo_url": "https://github.com/mailersend/mailersend-java",
        "last_pushed_at": "2026-05-29T08:29:36Z"
      }
    ],
    "mcp_url": "https://mcp.mailersend.com/m",
    "quickstart_url": "https://developers.mailersend.com/guides/sdk/"
  },
  "pricing": {
    "pricing_model": "hybrid",
    "has_published_pricing": true,
    "starting_price_usd": "7.0000",
    "price_basis": "month",
    "free_tier_available": true,
    "free_tier_limit": "500 emails/month",
    "free_tier_details": "The Free plan allows you to send up to 500 emails a month for free, with a daily limit of 100 emails. Free plan includes: 1 sending domain, 1 API token, 100 daily API requests, 1 webhook, 1 inbound route, 1 SMTP user, 1 template, 1 user seat + 1 accountant, 10 email verification credits, 24-hour activity retention. Free plan does not allow for extra usage/overage.",
    "minimum_commitment": null,
    "self_serve_signup": true,
    "requires_sales_call": false,
    "requires_verification": false,
    "enterprise_plan_available": true,
    "price_points": [
      {
        "plan": "Free",
        "item": "500 emails",
        "amount_usd": "0.0000",
        "amount_percent": null,
        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/pricing"
      },
      {
        "plan": "Hobby",
        "item": "5,000 emails",
        "amount_usd": "7.0000",
        "amount_percent": null,
        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/pricing"
      },
      {
        "plan": "Hobby",
        "item": "5,000 emails",
        "amount_usd": "67.2000",
        "amount_percent": null,
        "per": "year",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/pricing"
      },
      {
        "plan": "Hobby",
        "item": "Extra emails",
        "amount_usd": "1.5000",
        "amount_percent": null,
        "per": "1,000 emails",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/pricing"
      },
      {
        "plan": "Starter",
        "item": "50,000 emails",
        "amount_usd": "35.0000",
        "amount_percent": null,
        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/pricing"
      },
      {
        "plan": "Starter",
        "item": "50,000 emails",
        "amount_usd": "336.0000",
        "amount_percent": null,
        "per": "year",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/compare/elastic-email-alternative"
      },
      {
        "plan": "Starter",
        "item": "100,000 emails",
        "amount_usd": "68.0000",
        "amount_percent": null,
        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/pricing"
      },
      {
        "plan": "Starter",
        "item": "250,000 emails",
        "amount_usd": "163.0000",
        "amount_percent": null,
        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/compare/sendinblue-alternative"
      },
      {
        "plan": "Starter",
        "item": "500,000 emails",
        "amount_usd": "325.0000",
        "amount_percent": null,
        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/compare/sendinblue-alternative"
      },
      {
        "plan": "Starter",
        "item": "1,000,000 emails",
        "amount_usd": "600.0000",
        "amount_percent": null,
        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/compare/sendinblue-alternative"
      },
      {
        "plan": "Starter",
        "item": "1,500,000 emails",
        "amount_usd": "1350.0000",
        "amount_percent": null,
        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/compare/mailtrap-alternative"
      },
      {
        "plan": "Starter",
        "item": "2,000,000 emails",
        "amount_usd": "1600.0000",
        "amount_percent": null,
        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/compare/mailtrap-alternative"
      },
      {
        "plan": "Starter",
        "item": "Extra emails (at 50k tier)",
        "amount_usd": "0.9000",
        "amount_percent": null,
        "per": "1,000 emails",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/pricing"
      },
      {
        "plan": "Starter",
        "item": "Extra emails (at 100k tier)",
        "amount_usd": "1.3000",
        "amount_percent": null,
        "per": "1,000 emails",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/pricing"
      },
      {
        "plan": "Starter",
        "item": "Extra SMS",
        "amount_usd": "1.4000",
        "amount_percent": null,
        "per": "100 SMS",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/pricing"
      },
      {
        "plan": "Professional",
        "item": "50,000 emails",
        "amount_usd": "110.0000",
        "amount_percent": null,
        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plans-features-and-limits"
      },
      {
        "plan": "Professional",
        "item": "50,000 emails",
        "amount_usd": "1056.0000",
        "amount_percent": null,
        "per": "year",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/compare/mailtrap-alternative"
      },
      {
        "plan": "Professional",
        "item": "100,000 emails",
        "amount_usd": "140.0000",
        "amount_percent": null,
        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/blog/agency-pricing-transactional-email-whatsapp"
      },
      {
        "plan": "Professional",
        "item": "Extra emails (at 50k tier)",
        "amount_usd": "0.9000",
        "amount_percent": null,
        "per": "1,000 emails",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/pricing"
      },
      {
        "plan": "Professional",
        "item": "Extra SMS",
        "amount_usd": "1.4000",
        "amount_percent": null,
        "per": "100 SMS",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/pricing"
      },
      {
        "plan": null,
        "item": "Domain space",
        "amount_usd": "4.0000",
        "amount_percent": null,
        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
      {
        "plan": null,
        "item": "Phone number",
        "amount_usd": "2.0000",
        "amount_percent": null,
        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/pricing"
      },
      {
        "plan": "Professional",
        "item": "Dedicated IP",
        "amount_usd": "50.0000",
        "amount_percent": null,
        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
      {
        "plan": null,
        "item": "DMARC monitor",
        "amount_usd": "2.0000",
        "amount_percent": null,
        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/pricing"
      },
      {
        "plan": null,
        "item": "Activity data retention (50K emails, 30 days)",
        "amount_usd": "5.0000",
        "amount_percent": null,
        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
      {
        "plan": null,
        "item": "Activity data retention (50K emails, 90 days)",
        "amount_usd": "10.0000",
        "amount_percent": null,
        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
      {
        "plan": null,
        "item": "Activity data retention (50K emails, 180 days)",
        "amount_usd": "12.5000",
        "amount_percent": null,
        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
      {
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        "item": "Activity data retention (50K emails, 365 days)",
        "amount_usd": "15.0000",
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        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
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        "source_url": "https://www.mailersend.com/help/plan-add-ons"
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        "amount_usd": "20.0000",
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        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
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        "plan": null,
        "item": "Activity data retention (100K emails, 180 days)",
        "amount_usd": "25.0000",
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        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plan-add-ons"
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        "per": "month",
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        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
      {
        "plan": null,
        "item": "Activity data retention (2.5M emails, 90 days)",
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        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
      {
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        "item": "Activity data retention (2.5M emails, 180 days)",
        "amount_usd": "500.0000",
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        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
      {
        "plan": null,
        "item": "Activity data retention (2.5M emails, 365 days)",
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        "per": "month",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
      {
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        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
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        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
      {
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        "per": "credit",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
      {
        "plan": null,
        "item": "Email verification credit (25K–50K volume)",
        "amount_usd": "0.0070",
        "amount_percent": null,
        "per": "credit",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
      {
        "plan": null,
        "item": "Email verification credit (50K–100K volume)",
        "amount_usd": "0.0060",
        "amount_percent": null,
        "per": "credit",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
      {
        "plan": null,
        "item": "Email verification credit (100K–250K volume)",
        "amount_usd": "0.0050",
        "amount_percent": null,
        "per": "credit",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
      {
        "plan": null,
        "item": "Email verification credit (250K–500K volume)",
        "amount_usd": "0.0040",
        "amount_percent": null,
        "per": "credit",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
      {
        "plan": null,
        "item": "Email verification credit (500K–1M volume)",
        "amount_usd": "0.0030",
        "amount_percent": null,
        "per": "credit",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
      {
        "plan": null,
        "item": "Email verification credit (1M–2M volume)",
        "amount_usd": "0.0020",
        "amount_percent": null,
        "per": "credit",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
      {
        "plan": null,
        "item": "Email verification credit (2M+ volume)",
        "amount_usd": "0.0010",
        "amount_percent": null,
        "per": "credit",
        "currency": "USD",
        "source_url": "https://www.mailersend.com/help/plan-add-ons"
      },
      {
        "plan": null,
        "item": "Yearly billing discount",
        "amount_usd": null,
        "amount_percent": "10.0000",
        "per": null,
        "currency": "USD",
        "source_url": "https://www.mailersend.com/pricing"
      },
      {
        "plan": null,
        "item": "Nonprofit discount",
        "amount_usd": null,
        "amount_percent": "30.0000",
        "per": null,
        "currency": "USD",
        "source_url": "https://www.mailersend.com/pricing"
      }
    ]
  },
  "compliance": {
    "soc2": "unknown",
    "hipaa": false,
    "gdpr": true,
    "iso_27001": true,
    "pci_dss": false,
    "sla_published": true,
    "sla_url": "https://www.mailersend.com/legal/service-level-agreement",
    "data_retention_policy_url": null,
    "documented_rate_limits": "POST /v1/email: 120 requests/min; POST /v1/bulk-email: 10 requests/min (Free/Hobby), 15 (Starter), 30 (Professional), 60 (Enterprise); All other API requests: 60 requests/min; GET /v1/activity: 10 requests/min; SMTP: 120 requests/min; daily API quota: 100/day (Free/Trial), 1,000/day (Hobby), 100,000/day (Starter), 500,000/day (Professional/Enterprise)",
    "known_restrictions": [
      "Services are strictly for commercial use; personal, family, or household use is prohibited (Section 1.4, Terms of Use).",
      "SMS is restricted to US and Canada phone numbers only.",
      "Free/Trial plan does not allow overage sending beyond the included email allowance.",
      "Prohibited content categories include: loans, gambling, cryptocurrency, cannabis, alcohol, tobacco/vape, firearms, pornography, escort services, weight loss material, pyramid schemes, forex, affiliate marketing, purchased/rented email lists, and more (Section 7.1, Terms of Use).",
      "Creating multiple accounts is forbidden (Section 11, Terms of Use).",
      "Services are not provided to customers registered in countries/regions sanctioned by the US, UK, EU, or UN (Section 1.3, Terms of Use).",
      "Bulk email limited to 500 messages per request on paid plans, 5 on Trial.",
      "Email recipients limited to max 50 to, 10 cc, 10 bcc per message.",
      "Email attachments max 25 MB each after Base64 decoding.",
      "Custom headers and list-unsubscribe are Professional and Enterprise accounts only.",
      "In-Reply-To and References fields are paid plans only."
    ]
  },
  "developer": {
    "docs_url": "https://developers.mailersend.com",
    "api_reference_url": null,
    "openapi_spec_url": null,
    "postman_collection_url": null,
    "changelog_url": null,
    "status_page_url": "https://status.mailersend.com",
    "llms_txt_url": "https://www.mailersend.com/llms.txt",
    "markdown_docs_url": null
  },
  "adoption": {
    "launched_at": null,
    "ga_date": null,
    "github_stars": 173,
    "github_stars_at": "2026-06-07T18:55:30.898Z",
    "notable_customers": []
  },
  "scores": {
    "agent_friendliness": null,
    "pricing_transparency": null,
    "setup_speed": null,
    "docs_quality": null,
    "procurement_friction": null,
    "trust_readiness": null,
    "best_for": [],
    "avoid_if": []
  },
  "sources": [
    {
      "field": "supported_actions",
      "url": "https://developers.mailersend.com/api/v1/recipients",
      "excerpt": null,
      "confidence": "medium"
    },
    {
      "field": "supported_actions",
      "url": "https://developers.mailersend.com/api/v1/inbound",
      "excerpt": null,
      "confidence": "medium"
    },
    {
      "field": "supported_actions",
      "url": "https://developers.mailersend.com/api/v1/email-verification",
      "excerpt": null,
      "confidence": "medium"
    },
    {
      "field": "supported_actions",
      "url": "https://developers.mailersend.com/api/v1/webhooks",
      "excerpt": null,
      "confidence": "medium"
    },
    {
      "field": "supported_actions",
      "url": "https://developers.mailersend.com/api/v1/sms-webhooks",
      "excerpt": null,
      "confidence": "medium"
    },
    {
      "field": "supported_actions",
      "url": "https://developers.mailersend.com/api/v1/activity",
      "excerpt": null,
      "confidence": "medium"
    },
    {
      "field": "documented_rate_limits",
      "url": "https://developers.mailersend.com/general",
      "excerpt": "The default rate limit is 120 requests per minute for /email endpoints, 10 requests per minute for /bulk-email endpoints and 60 requests per",
      "confidence": "medium"
    },
    {
      "field": "documented_rate_limits",
      "url": "https://www.mailersend.com/help/rate-limits-how-to-reduce-403-422-429-errors",
      "excerpt": "Learn to manage MailerSend's API rate limits and quotas to avoid 403, 422, and 429 errors effectively.",
      "confidence": "medium"
    },
    {
      "field": "vendor_description",
      "url": "http://developers.mailersend.com/",
      "excerpt": "MailerSend is a powerful transactional email system built for developers but designed so non-tech teams can contribute without coding.",
      "confidence": "high"
    },
    {
      "field": "output_types",
      "url": "https://developers.mailersend.com/api/v1/email",
      "excerpt": "This endpoint allows you to start sending emails through the MailerSend Email API. Send an email. This endpoint allows you to send an asynchronous email.",
      "confidence": "medium"
    },
    {
      "field": "output_types",
      "url": "https://developers.mailersend.com/guides/setting-up-webhooks",
      "excerpt": "When MailerSend sends a webhook event to your endpoint, it will include a JSON payload with information about the event.",
      "confidence": "medium"
    },
    {
      "field": "sdk_languages",
      "url": "http://mailersend.com/features/smtp-relay",
      "excerpt": "Easily add email to your stack with 7 official libraries and extensive API documentation.",
      "confidence": "medium"
    },
    {
      "field": "sdk_languages",
      "url": "https://developers.mailersend.com/guides/sdk/sending-emails-with-mailersend-and-nodejs",
      "excerpt": "This guide will walk you through the steps required to set up a sample Node.js app that uses the MailerSend SDK to send emails.",
      "confidence": "medium"
    },
    {
      "field": "free_tier_details",
      "url": "https://www.mailersend.com/help/plans-features-and-limits",
      "excerpt": "Free plan allows you to send up to 500 emails a month for free, with a daily limit of 100 emails.",
      "confidence": "medium"
    },
    {
      "field": "free_tier_details",
      "url": "https://www.mailersend.com/pricing",
      "excerpt": "Our Free plan has a few limits per account: 1 template, 1 domain, 1 user (plus 1 accountant), 1 API token, 1 webhook, and 100 daily requests.",
      "confidence": "medium"
    },
    {
      "field": "name",
      "url": "http://developers.mailersend.com/",
      "excerpt": "MailerSend is a powerful transactional email system built for developers but designed so non-tech teams can contribute without coding.",
      "confidence": "high"
    },
    {
      "field": "sla_published",
      "url": "https://www.mailersend.com/legal/service-level-agreement",
      "excerpt": "MailerSend will use commercially reasonable efforts to make our Service available with a Monthly Uptime Percentage of at least 99.5% during any",
      "confidence": "high"
    },
    {
      "field": "iso_27001",
      "url": "https://www.mailersend.com/legal/privacy-policy",
      "excerpt": "Our data storage centers are in the European Union and have an information storage security certificate (ISO 27001) as well as a certificate of IT service",
      "confidence": "high"
    },
    {
      "field": "webhooks_supported",
      "url": "https://developers.mailersend.com/api/v1/webhooks",
      "excerpt": "Webhooks allow you to subscribe to real-time notifications about various events that occur in MailerSend.",
      "confidence": "high"
    },
    {
      "field": "webhooks_supported",
      "url": "https://www.mailersend.com/help/webhooks",
      "excerpt": "You can create a webhook directly from your account. For example, an HTTP POST callback is sent to your provided URL with a payload about the sent email.",
      "confidence": "high"
    },
    {
      "field": "webhooks_supported",
      "url": "https://developers.mailersend.com/api/v1/sms-webhooks",
      "excerpt": "SMS Webhooks allow you to subscribe to real-time notifications about various SMS events that occur in MailerSend.",
      "confidence": "high"
    },
    {
      "field": "free_tier_available",
      "url": "https://www.mailersend.com/help/plans-features-and-limits",
      "excerpt": "Free plan allows you to send up to 500 emails a month for free, with a daily limit of 100 emails.",
      "confidence": "high"
    },
    {
      "field": "free_tier_available",
      "url": "https://www.mailersend.com/pricing",
      "excerpt": "Our Free plan has a few limits per account: 1 template, 1 domain, 1 user (plus 1 accountant), 1 API token, 1 webhook, and 100 daily requests.",
      "confidence": "high"
    },
    {
      "field": "minimum_commitment",
      "url": "http://mailersend.com/help/how-to-change-or-cancel-your-plan",
      "excerpt": "View the steps to upgrade, change or cancel your MailerSend plan, including how to switch from a monthly to yearly subscription.",
      "confidence": "medium"
    },
    {
      "field": "supported_regions",
      "url": "https://www.mailersend.com/legal/privacy-policy",
      "excerpt": "Our data storage centers are in the European Union and have an information storage security certificate (ISO 27001) as well as a certificate of IT service",
      "confidence": "low"
    },
    {
      "field": "supported_regions",
      "url": "https://www.mailersend.com/legal/terms-of-use",
      "excerpt": "7.2. You can send transactional and marketing emails and / or SMS using MailerSend only if the content is created by you or you have the right to use it.",
      "confidence": "low"
    },
    {
      "field": "known_restrictions",
      "url": "https://www.mailersend.com/legal/terms-of-use",
      "excerpt": "7.2. You can send transactional and marketing emails and / or SMS using MailerSend only if the content is created by you or you have the right to use it.",
      "confidence": "medium"
    },
    {
      "field": "known_restrictions",
      "url": "https://www.mailersend.com/help/plans-features-and-limits",
      "excerpt": "Free plan allows you to send up to 500 emails a month for free, with a daily limit of 100 emails.",
      "confidence": "medium"
    },
    {
      "field": "self_serve_signup",
      "url": "https://www.mailersend.com/help/how-to-start-sending-emails",
      "excerpt": "Send emails using the API · Navigate to the Domains page and click Manage next to the desired domain. · Create an API token. · When your API token is ready, and",
      "confidence": "high"
    },
    {
      "field": "self_serve_signup",
      "url": "https://www.mailersend.com/pricing",
      "excerpt": "Our Free plan has a few limits per account: 1 template, 1 domain, 1 user (plus 1 accountant), 1 API token, 1 webhook, and 100 daily requests.",
      "confidence": "high"
    },
    {
      "field": "gdpr",
      "url": "https://www.mailersend.com/legal/how-mailersend-stays-gdpr-compliant",
      "excerpt": "We have all the necessary documents and GDPR-appropriate technical and organizational measures in place to ensure a high level of personal data protection.",
      "confidence": "high"
    },
    {
      "field": "gdpr",
      "url": "https://www.mailersend.com/legal/security-statement",
      "excerpt": "Learn how MailerSend ensures the security of your data with industry-best practices, certifications, and compliance with GDPR.",
      "confidence": "high"
    },
    {
      "field": "website_url",
      "url": "http://mailersend.com/",
      "excerpt": "# Intuitive email API and SMTP\nEmail sending with high deliverability, easy integration, and a robust API supported by extensive documentation.",
      "confidence": "high"
    },
    {
      "field": "primary_use_cases",
      "url": "http://mailersend.com/features/transactional-emails",
      "excerpt": "MailerSend is the transactional email service providing reliable email delivery you can count on.",
      "confidence": "medium"
    },
    {
      "field": "primary_use_cases",
      "url": "https://developers.mailersend.com/api/v1/sms",
      "excerpt": null,
      "confidence": "medium"
    },
    {
      "field": "primary_use_cases",
      "url": "https://www.mailersend.com/features/inbound-emails",
      "excerpt": "MailerSend's inbound email routing feature helps you create 2-way conversations with you customers and enable them to interact with your app.",
      "confidence": "medium"
    },
    {
      "field": "primary_use_cases",
      "url": "https://developers.mailersend.com/api/v1/email-verification",
      "excerpt": null,
      "confidence": "medium"
    },
    {
      "field": "supported_actions",
      "url": "https://developers.mailersend.com/api/v1/email",
      "excerpt": "This endpoint allows you to start sending emails through the MailerSend Email API. Send an email. This endpoint allows you to send an asynchronous email.",
      "confidence": "medium"
    },
    {
      "field": "supported_actions",
      "url": "https://developers.mailersend.com/api/v1/sms",
      "excerpt": null,
      "confidence": "medium"
    },
    {
      "field": "supported_actions",
      "url": "https://developers.mailersend.com/api/v1/domains",
      "excerpt": null,
      "confidence": "medium"
    },
    {
      "field": "supported_actions",
      "url": "https://developers.mailersend.com/api/v1/templates",
      "excerpt": null,
      "confidence": "medium"
    },
    {
      "field": "categories",
      "url": "http://mailersend.com/features/transactional-emails",
      "excerpt": "MailerSend is the transactional email service providing reliable email delivery you can count on.",
      "confidence": "high"
    },
    {
      "field": "categories",
      "url": "https://developers.mailersend.com/api/v1/sms",
      "excerpt": null,
      "confidence": "high"
    },
    {
      "field": "hipaa",
      "url": "https://www.paubox.com/blog/can-i-use-mailersend-and-be-hipaa-compliant",
      "excerpt": "While we found references to their stance on GDPR compliance, we did not find anything when it came to HIPAA, BAA, or PHI.",
      "confidence": "medium"
    },
    {
      "field": "supported_languages",
      "url": "http://developers.mailersend.com/",
      "excerpt": "MailerSend is a powerful transactional email system built for developers but designed so non-tech teams can contribute without coding.",
      "confidence": "high"
    },
    {
      "field": "soc2",
      "url": "https://www.mailersend.com/legal/security-statement",
      "excerpt": "Learn how MailerSend ensures the security of your data with industry-best practices, certifications, and compliance with GDPR.",
      "confidence": "medium"
    },
    {
      "field": "mcp_server_available",
      "url": "http://mailersend.com/help/how-to-connect-mailersends-mcp",
      "excerpt": "The MailerSend MCP (Model Context Protocols) server can be integrated with your AI tools in just a few steps—no downloads or extensive configuration needed.",
      "confidence": "high"
    },
    {
      "field": "pci_dss",
      "url": "https://www.mailersend.com/legal/security-statement",
      "excerpt": "Learn how MailerSend ensures the security of your data with industry-best practices, certifications, and compliance with GDPR.",
      "confidence": "medium"
    },
    {
      "field": "pricing_model",
      "url": "https://checkthat.ai/brands/mailersend/pricing",
      "excerpt": null,
      "confidence": "medium"
    },
    {
      "field": "pricing_model",
      "url": "https://www.mailersend.com/help/plans-features-and-limits",
      "excerpt": "Free plan allows you to send up to 500 emails a month for free, with a daily limit of 100 emails. Starter plans start from as little as $35 a month, or $31.50",
      "confidence": "medium"
    },
    {
      "field": "pricing_model",
      "url": "https://www.mailersend.com/pricing",
      "excerpt": "Our Free plan has a few limits per account: 1 template, 1 domain, 1 user (plus 1 accountant), 1 API token, 1 webhook, and 100 daily requests.",
      "confidence": "medium"
    },
    {
      "field": "has_published_pricing",
      "url": "https://www.mailersend.com/pricing",
      "excerpt": "Our Free plan has a few limits per account: 1 template, 1 domain, 1 user (plus 1 accountant), 1 API token, 1 webhook, and 100 daily requests.",
      "confidence": "high"
    },
    {
      "field": "has_published_pricing",
      "url": "https://checkthat.ai/brands/mailersend/pricing",
      "excerpt": null,
      "confidence": "high"
    },
    {
      "field": "requires_sales_call",
      "url": "https://www.mailersend.com/help/how-to-start-sending-emails",
      "excerpt": "Send emails using the API · Navigate to the Domains page and click Manage next to the desired domain. · Create an API token. · When your API token is ready, and",
      "confidence": "high"
    },
    {
      "field": "enterprise_plan_available",
      "url": "https://www.mailersend.com/pricing",
      "excerpt": "Our Free plan has a few limits per account: 1 template, 1 domain, 1 user (plus 1 accountant), 1 API token, 1 webhook, and 100 daily requests. To increase your",
      "confidence": "medium"
    },
    {
      "field": "enterprise_plan_available",
      "url": "https://checkthat.ai/brands/mailersend/pricing",
      "excerpt": null,
      "confidence": "medium"
    },
    {
      "field": "input_types",
      "url": "https://developers.mailersend.com/api/v1/email",
      "excerpt": "This endpoint allows you to start sending emails through the MailerSend Email API. Send an email. This endpoint allows you to send an asynchronous email.",
      "confidence": "medium"
    },
    {
      "field": "input_types",
      "url": "http://mailersend.com/features/smtp-relay",
      "excerpt": "Easily add email to your stack with 7 official libraries and extensive API documentation.",
      "confidence": "medium"
    },
    {
      "field": "input_types",
      "url": "http://mailersend.com/features/email-api",
      "excerpt": "MailerSend is a transactional messaging service provider that offers a powerful email sending API and SMTP relay, built so that developers can integrate",
      "confidence": "medium"
    },
    {
      "field": "sandbox_available",
      "url": "https://www.mailersend.com/help/how-to-test-email-sending-in-mailersend",
      "excerpt": "Learn to test MailerSend's email capabilities using blackhole recipients. Including API, SMTP sending, webhooks, and activity tracking.",
      "confidence": "medium"
    },
    {
      "field": "webhook_events_url",
      "url": "https://developers.mailersend.com/api/v1/webhooks",
      "excerpt": "You can create a webhook directly from your MailerSend account and listen for events so your integration can automatically trigger reactions. # Webhooks",
      "confidence": "high"
    },
    {
      "field": "base_url",
      "url": "https://developers.mailersend.com/",
      "excerpt": "Discover the ultimate API resources and authentication guide for MailerSend Developers. Improve your transactional messaging with our powerful API.",
      "confidence": "medium"
    },
    {
      "field": "base_url",
      "url": "https://developers.mailersend.com/api/v1/domains",
      "excerpt": "Get information about your domain names, their account verification statuses, activity statistics, and history.",
      "confidence": "medium"
    },
    {
      "field": "free_tier_limit",
      "url": "https://www.mailersend.com/pricing",
      "excerpt": "How does the Free plan work? Once your account is approved, you can subscribe to a Free plan. This plan lets you send up to 500 emails per month for free!",
      "confidence": "high"
    },
    {
      "field": "free_tier_limit",
      "url": "https://www.mailersend.com/",
      "excerpt": "Start with 500 emails/month for free and upgrade to get more volume or features.",
      "confidence": "high"
    },
    {
      "field": "fields_not_found",
      "url": "https://www.mailersend.com/about-us",
      "excerpt": "We launched MailerSend to give you the same advantages for transactional emails. After 10+ years of sending huge volumes of emails and experiencing similar",
      "confidence": "medium"
    },
    {
      "field": "fields_not_found",
      "url": "https://developers.mailersend.com/",
      "excerpt": "Discover the ultimate API resources and authentication guide for MailerSend Developers.",
      "confidence": "medium"
    },
    {
      "field": "rate_limit_window",
      "url": "https://www.mailersend.com/help/rate-limits-how-to-reduce-403-422-429-errors",
      "excerpt": "Learn to manage MailerSend's API rate limits and quotas to avoid 403, 422, and 429 errors effectively.",
      "confidence": "medium"
    },
    {
      "field": "starting_price_usd",
      "url": "https://www.mailersend.com/compare/mandrill-alternative",
      "excerpt": "5,000 emails/month, $7",
      "confidence": "high"
    },
    {
      "field": "starting_price_usd",
      "url": "https://www.mailersend.com/compare/smtp-alternative",
      "excerpt": "Start with 500 free emails per month, then upgrade for as little as $7/month to get more emails and features!",
      "confidence": "high"
    },
    {
      "field": "versioning_scheme",
      "url": "https://developers.mailersend.com/",
      "excerpt": "Discover the ultimate API resources and authentication guide for MailerSend Developers. Improve your transactional messaging with our powerful API.",
      "confidence": "high"
    },
    {
      "field": "versioning_scheme",
      "url": "https://developers.mailersend.com/api/v1/email",
      "excerpt": "Learn how to start sending emails quickly with MailerSend's Email API and comprehensive developers' documentation.",
      "confidence": "high"
    },
    {
      "field": "auth_docs_url",
      "url": "https://developers.mailersend.com/general",
      "excerpt": "Authentication is done by adding an Authorization header containing an API token as a value to your API request. To do this, you need to add an",
      "confidence": "high"
    },
    {
      "field": "price_basis",
      "url": "https://www.mailersend.com/compare/smtp-alternative",
      "excerpt": "upgrade for as little as $7/month to get more emails and features!",
      "confidence": "high"
    },
    {
      "field": "price_basis",
      "url": "https://www.mailersend.com/help/plans-features-and-limits",
      "excerpt": "Professional plans start at $110 a month, or $99 a month with an annual plan, for an allowance of 50,000 emails per month.",
      "confidence": "high"
    },
    {
      "field": "requires_verification",
      "url": "https://www.mailersend.com/help/getting-started",
      "excerpt": "Check out our guide on how to start using MailerSend. In less than 5 minutes, learn how to verify your account and start sending transactional emails.",
      "confidence": "medium"
    },
    {
      "field": "requires_verification",
      "url": "https://www.mailersend.com/help/how-to-start-sending-emails",
      "excerpt": "Your API token or your SMTP credentials must be valid and authorized before you can start sending emails ... Make sure your account has been approved so you can",
      "confidence": "medium"
    },
    {
      "field": "api_style",
      "url": "https://www.mailersend.com/features/email-api",
      "excerpt": "Integrate in minutes with our powerful RESTful email API and official libraries. Node.js, PHP, Laravel, Python, Ruby, Go and Java SDK's. Start for free now!",
      "confidence": "high"
    },
    {
      "field": "idempotency_supported",
      "url": "https://developers.mailersend.com/",
      "excerpt": "Discover the ultimate API resources and authentication guide for MailerSend Developers. Improve your transactional messaging with our powerful API.",
      "confidence": "low"
    },
    {
      "field": "notable_customers",
      "url": "https://www.mailersend.com/",
      "excerpt": "Pricing. Four simple plans, no hidden costs. Start with 500 emails/month for free and upgrade to get more volume or features.",
      "confidence": "high"
    },
    {
      "field": "notable_customers",
      "url": "https://www.mailersend.com/about-us",
      "excerpt": "We launched MailerSend to give you the same advantages for transactional emails.",
      "confidence": "high"
    },
    {
      "field": "mcp_url",
      "url": "https://mailersend.com/help/how-to-connect-mailersends-mcp",
      "excerpt": "How to connect MailerSend's MCP with your AI tools",
      "confidence": "medium"
    },
    {
      "field": "ga_date",
      "url": "https://developers.mailersend.com/general",
      "excerpt": "Mar 5, 2022 — Authentication is done by adding an Authorization header containing an API token as a value to your API request.",
      "confidence": "low"
    },
    {
      "field": "stability",
      "url": "https://developers.mailersend.com/",
      "excerpt": "Discover the ultimate API resources and authentication guide for MailerSend Developers. Improve your transactional messaging with our powerful API.",
      "confidence": "medium"
    },
    {
      "field": "stability",
      "url": "https://www.mailersend.com/legal/service-level-agreement",
      "excerpt": "MailerSend will use commercially reasonable efforts to make our Service available with a Monthly Uptime Percentage of at least 99.5% during any",
      "confidence": "medium"
    },
    {
      "field": "data_retention_policy_url",
      "url": "https://www.mailersend.com/whats-new/data-retention-add-on",
      "excerpt": "Dec 19, 2024 — With the new add-on options, you can choose to retain your activity data for 7, 30, 90, 180, or 365 days.",
      "confidence": "medium"
    },
    {
      "field": "data_retention_policy_url",
      "url": "http://mailersend.com/legal/privacy-policy",
      "excerpt": "MailerSend is a corporation whose legal name is MailerSend, Inc. (228 Park Ave S, PMB 54955, New York, New York 10003-1502, US, \"MailerSend\").\n\"). MailerSend provides cloud-based transactional e",
      "confidence": "medium"
    },
    {
      "field": "rate_limit_requests",
      "url": "https://www.mailersend.com/help/rate-limits-how-to-reduce-403-422-429-errors",
      "excerpt": "Learn to manage MailerSend's API rate limits and quotas to avoid 403, 422, and 429 errors effectively.",
      "confidence": "medium"
    },
    {
      "field": "deprecation_policy_url",
      "url": "https://www.mailersend.com/legal",
      "excerpt": "Because, at MailerSend, we take confidentiality seriously and because your trust is paramount to us, find all legal resources below.",
      "confidence": "medium"
    },
    {
      "field": "deprecation_policy_url",
      "url": "https://www.mailersend.com/legal/api-use-policy",
      "excerpt": "MailerSend reserves the right to change this API Use Policy at any time. If we decide to change this document, we will post changes on this page",
      "confidence": "medium"
    },
    {
      "field": "quickstart_url",
      "url": "https://developers.mailersend.com/guides/sdk/",
      "excerpt": "MailerSend offers various first-party SDKs that you can use to send emails. Check out these guides on how to quick start the process: Sending Emails with",
      "confidence": "high"
    },
    {
      "field": "auth_methods",
      "url": "https://developers.mailersend.com/general",
      "excerpt": "Authentication is done by adding an Authorization header containing an API token as a value to your API request. To do this, you need to add an",
      "confidence": "high"
    },
    {
      "field": "auth_methods",
      "url": "https://www.mailersend.com/help/managing-api-tokens",
      "excerpt": "API tokens are used for authentication when sending emails or accessing server-specific endpoints. Locate MailerSend API and click Manage. 3. Click Create new",
      "confidence": "high"
    },
    {
      "field": "api_version",
      "url": "https://developers.mailersend.com/api/v1/email",
      "excerpt": "Learn how to start sending emails quickly with MailerSend's Email API and comprehensive developers' documentation.",
      "confidence": "high"
    },
    {
      "field": "api_version",
      "url": "https://developers.mailersend.com/api/v1/webhooks",
      "excerpt": "You can create a webhook directly from your MailerSend account and listen for events so your integration can automatically trigger reactions.",
      "confidence": "high"
    },
    {
      "field": "sdk_packages",
      "url": "https://github.com/mailersend",
      "excerpt": "Send emails and SMS in minutes. Developers come for the high deliverability, and stay because our intuitive API and built-in integrations make life easier.",
      "confidence": "medium"
    },
    {
      "field": "sdk_packages",
      "url": "https://github.com/mailersend/mailersend-python",
      "excerpt": "The MailerSend SDK provides flexible ways to access and work with API response data.",
      "confidence": "medium"
    },
    {
      "field": "sdk_packages",
      "url": "https://github.com/mailersend/mailersend-nodejs",
      "excerpt": "Send emails and SMS in minutes.",
      "confidence": "medium"
    },
    {
      "field": "sdk_packages",
      "url": "https://github.com/mailersend/mailersend-go",
      "excerpt": "Send an email · Add CC, BCC recipients · Send a template-based email · Personalization · Send email with attachment · Send email with inline attachment.",
      "confidence": "medium"
    },
    {
      "field": "sdk_packages",
      "url": "https://github.com/mailersend/mailersend-php",
      "excerpt": "This library is built atop of PSR-7 and PSR-18.",
      "confidence": "medium"
    },
    {
      "field": "sdk_packages",
      "url": "https://developers.mailersend.com/guides/sdk/",
      "excerpt": "MailerSend offers various first-party SDKs that you can use to send emails. Check out these guides on how to quick start the process",
      "confidence": "medium"
    },
    {
      "field": "error_format",
      "url": "https://www.mailersend.com/help/rest-api-response-codes",
      "excerpt": "422 usually means the API call has not been correctly formatted and/or there is a validation error due to the reasons outlined below. \"The attachments.0",
      "confidence": "medium"
    },
    {
      "field": "sla_url",
      "url": "https://www.mailersend.com/legal/service-level-agreement",
      "excerpt": "MailerSend will use commercially reasonable efforts to make our Service available with a Monthly Uptime Percentage of at least 99.5% during any",
      "confidence": "high"
    },
    {
      "field": "launched_at",
      "url": "https://www.mailersend.com/about-us",
      "excerpt": "We launched MailerSend to give you the same advantages for transactional emails. After 10+ years of sending huge volumes of emails and experiencing similar",
      "confidence": "low"
    },
    {
      "field": "webhook_signing",
      "url": "https://developers.mailersend.com/api/v1/webhooks",
      "excerpt": "You can create a webhook directly from your MailerSend account and listen for events so your integration can automatically trigger reactions.",
      "confidence": "medium"
    },
    {
      "field": "webhook_signing",
      "url": "https://developers.mailersend.com/guides/setting-up-webhooks",
      "excerpt": "Webhooks are a way for MailerSend to notify your application or service when certain events occur, such as when an email is sent or opened.",
      "confidence": "medium"
    }
  ],
  "fields_not_found": [
    "ga_date",
    "launched_at",
    "idempotency_supported"
  ],
  "source_confidence": "high",
  "last_verified_at": "2026-06-06T00:00:00.000Z"
}