Vonage SMS API

Best for: Regulated or enterprise workloads - compliance attestations and an enterprise plan; AI agents and automation - an agent-ready surface (MCP / llms.txt); Cost-sensitive teams - low, transparent entry price

Avoid if: You want to try it free before paying

• ██████▒░░░
  65 / 100
  Agent friendliness
• ████████▒░
  85 / 100
  Pricing transparency
• ███████▒░░
  75 / 100
  Setup speed
• █████▒░░░░
  55 / 100
  Docs quality
• ████████▒░
  85 / 100
  Procurement ease
• ████████▒░
  85 / 100
  Trust readiness

Scores are computed deterministically from this profile's published, sourced fields (pricing, compliance, capabilities, docs and developer-surface signals) - not from reviews or paid placement. Each axis is 0-100; an unknown signal scores 0 for that axis. Procurement ease is the inverse of buying friction (higher = easier to adopt).

Pricing model

Usage-based [2]vonage.com/communications-apis/sms/pricing/“SMS and Voice $1.04 per month”vonage.com/communications-apis/pricing

Published pricing

✓ Yes [3]vonage.com/communications-apis/pricingvonage.com/communications-apis/sms/pricing/“$0.00649 per message”

Free tier

✗ No [4]vonage.com/communications-apis/pricingapidog.com/blog/vonage-sms-api-cost/“Vonage SMS API pricing is pay-as-you-go with no monthly platform minimum”

Free tier details

Start developing now with free credit. No credit card required. [5]vonage.com/communications-apis/pricing

Self-serve signup

✓ Yes [6]github.com/vonage/vonage-node-sdk“Sign up for free at vonage.com”vonage.com/communications-apis/pricing

Requires sales call

✗ No [7]github.com/vonage/vonage-node-sdk“Sign up for free at vonage.com”vonage.com/communications-apis/pricing

Enterprise plan

✓ Yes [8]vonage.com/communications-apis/services/support/“99.99% platform availability SLA”

Supported actions

send_sms, receive_inbound_sms, search_message, delivery_receipt [9]developer.vonage.com/en/messaging/sms/guides/inbound-sms“To receive inbound SMS, create a webhook endpoint and configure your account to use it in the API settings tab of the Vonage Developer Dashboard.”developer.vonage.com/en/api/sms“By default Vonage attempts delivery for 72 hours, however the maximum effective value depends on the operator”developer.vonage.com/en/getting-started/concepts/webhooks“Sends the delivery status of your message and receives inbound SMS”

Regions

Global (Local numbers in 76 countries) [10]vonage.com/communications-apis/sms/features/

Input types

JSON, plain text [11]developer.vonage.com/en/api/sms

Output types

JSON, XML [12]developer.vonage.com/en/api/sms

Webhooks

✓ Yes [13]developer.vonage.com/en/getting-started/concepts/webhooks“Webhooks are used to deliver incoming messages and delivery receipts.”developer.vonage.com/en/messaging/sms/guides/inbound-sms“To receive inbound SMS, create a webhook endpoint and configure your account to use it in the API settings tab of the Vonage Developer Dashboard.”

Sandbox / test mode

✓ Yes [14]api.support.vonage.com/hc/en-us/articles/11679887237276-What-is-the-Messages-API-sandbox-rate-limit“Our Messages API sandbox has a limit of 1 message per second and 100 messages per month for all channels.”developer.vonage.com/en/messages/concepts/messages-api-sandbox“The Messages API Sandbox is a quick way to try out sending messages via certain messaging channels using the Vonage Messages API.”

SDK languages

Node.js, Python, Java, .NET, Ruby, PHP [15]github.com/vonage/vonage-node-sdk“This is the Node.JS Server SDK for Vonage APIs.”github.com/Vonage/vonage-kotlin-sdk“We also provide server SDKs in other languages: Java .NET PHP Python NodeJS Ruby”github.com/vonage/vonage-java-sdk“We also provide server SDKs in other languages: Kotlin .NET · PHP · Python · Ruby · NodeJS”

MCP server

✓ Yes [16]developer.vonage.com/en/blog/introducing-the-vonage-documentation-mcp-server“MCP servers (Model Context Protocol servers) provide a simple but powerful way to bridge external resources into tools like IDEs and AI”developer.vonage.com/en/mcp-server/overview“The Vonage MCP Server enables AI agents and developer tools to discover, describe, and use Vonage capabilities via the Model Context Protocol.”

SOC 2

SOC 2 Type II [17]vonage.com/resources/articles/vonage-network-apis-soc-2-type-2-compliance/prnewswire.com/news-releases/vonage-achieves-soc-2-type-ii-compliance-for-network-apis-reinforcing-its-commitment-to-data-security-and-customer-trust-302355586.html“It provides independent validation that Vonage has implemented the necessary controls to safeguard sensitive information, detect anomalies”vonage.com/communications-apis/platform/“Our platform is certified* for ISO27001, HIPAA, SOC 2, and PCI DSS”

HIPAA

✓ Yes [18]vonage.com/communications-apis/platform/“Our platform is certified* for ISO27001, HIPAA, SOC 2, and PCI DSS”vonage.com/communications-apis/healthcare/hipaa-compliance/

GDPR

– Unknown [19]vonage.com/legal/data/dpa/“Each party shall comply with its respective obligations under Applicable Data Protection Law in connection with the processing of Customer Personal Data”vonage.com/legal/privacy-policy/“In compliance with the EU-U.S. DPF, the UK Extension to the EU-U.S. DPF and the Swiss-U.S. DPF, Vonage commits to refer unresolved privacy”

ISO 27001

✓ Yes [20]vonage.com/security/vonage.com/communications-apis/platform/“Our platform is certified* for ISO27001, HIPAA, SOC 2, and PCI DSS”

PCI DSS

✓ Yes [21]vonage.com/communications-apis/platform/“Our platform is certified* for ISO27001, HIPAA, SOC 2, and PCI DSS”vonage.com/security/

Published SLA

✓ Yes [22]vonage.com/communications-apis/services/support/“99.99% platform availability SLA”vonage.com/communications-apis/platform/“Vonage API platform boasts 99.99% uptime”

Rate limits

due to carrier restrictions, the rate limit for outbound SMS can be as low as one request per second; the Message API has a rate limit of 1 message per second when sending messages within the US [23]api.support.vonage.com/hc/en-us/articles/4406782736532-10-DLC-Throughput-Limits“Vonage has configured a shared rate limit for all other carriers set at 600 TPM, per number”developer.vonage.com/en/blog/respect-api-rate-limits-with-a-backoff-dr“due to carrier restrictions, the rate limit for outbound SMS can be as low as one request per second”

Known restrictions

due to carrier restrictions, the rate limit for outbound SMS can be as low as one request per second, By default Vonage attempts delivery for 72 hours, however the maximum effective value depends on the operator and is typically 24 - 48 hours, country-specific requirements for Sender ID registrations, high-volume traffic queued automatically in accordance with each carrier's regulations, 10 DLC throughput limits vary by carrier (e.g. 600 TPM per number for some carriers) [24]developer.vonage.com/en/blog/respect-api-rate-limits-with-a-backoff-dr“due to carrier restrictions, the rate limit for outbound SMS can be as low as one request per second”api.support.vonage.com/hc/en-us/articles/4406782736532-10-DLC-Throughput-Limits“Vonage has configured a shared rate limit for all other carriers set at 600 TPM, per number”developer.vonage.com/en/api/sms“By default Vonage attempts delivery for 72 hours, however the maximum effective value depends on the operator and is typically 24 - 48 hours”

• Docs
• API reference
• llms.txt
• Changelog

Docs rendering: static · llms.txt present

API style

rest

Base URL

https://rest.nexmo.com

Versioning

none

Stability

ga

Auth methods

api_key, basic

Error format

vendor-specific

Webhook signing

hmac_sha256

Rate limit

30 / second

SDKs

• Node.js @vonage/server-sdk (npm) · repo
• Python vonage (pypi) · repo
• Java com.vonage:server-sdk (maven) · repo
• .NET Vonage (nuget) · repo
• Ruby vonage (rubygems) · repo
• PHP vonage/client (packagist) · repo

• Auth docs
• Quickstart
• MCP server
• Webhook events

Notable customers

Domino's Pizza, InTouch Health, Story Corps, The Princeton Review, Kickstarter, Doxy.me

• Twilio Programmable Messaging

  One Messaging API to reliably reach 7B+ devices

  Usage · public pricing · self-serve

• Sinch SMS API

  "Simple, secure SMS API for global reach"

  Usage · public pricing · self-serve

• Bird

  The global SMS API that scales with you

  Usage · public pricing · self-serve

• Telnyx SMS API

  Carrier-grade SMS API with direct routing. No aggregator markup, no middleman margin. Programmable messaging on infrastructure Telnyx owns end-to-end.

  Usage · public pricing · self-serve

• Infobip SMS API

  Send business text messages with a leading SMS service provider

  Usage · public pricing · self-serve

• AWS End User Messaging

  AWS End User Messaging empowers developers to integrate scalable and reliable messaging capabilities into their applications. AWS End User Messaging helps you engage your customers by sending them SMS, voice messages, WhatsApp, and push notifications.

  Usage · free tier · public pricing · self-serve

Vonage SMS API alternatives · Vonage SMS API vs Twilio Programmable Messaging · All SMS APIs APIs

Each field above carries a numbered source - hover for a preview, click to jump here.

1. ↑Description: vonage.com
2. ↑Pricing model: vonage.com · vonage.com
3. ↑Published pricing: vonage.com · vonage.com
4. ↑Free tier: vonage.com · apidog.com
5. ↑Free tier details: vonage.com
6. ↑Self-serve signup: github.com · vonage.com
7. ↑Requires sales call: github.com · vonage.com
8. ↑Enterprise plan: vonage.com
9. ↑Supported actions: developer.vonage.com · developer.vonage.com · developer.vonage.com
10. ↑Regions: vonage.com
11. ↑Input types: developer.vonage.com
12. ↑Output types: developer.vonage.com
13. ↑Webhooks: developer.vonage.com · developer.vonage.com
14. ↑Sandbox: api.support.vonage.com · developer.vonage.com
15. ↑SDK languages: github.com · github.com · github.com
16. ↑MCP server: developer.vonage.com · developer.vonage.com
17. ↑SOC 2: vonage.com · prnewswire.com · vonage.com
18. ↑HIPAA: vonage.com · vonage.com
19. ↑GDPR: vonage.com · vonage.com
20. ↑ISO 27001: vonage.com · vonage.com
21. ↑PCI DSS: vonage.com · vonage.com
22. ↑Published SLA: vonage.com · vonage.com
23. ↑Rate limits: api.support.vonage.com · developer.vonage.com
24. ↑Known restrictions: developer.vonage.com · api.support.vonage.com · developer.vonage.com

Every field change, who made it, and when - from our audited data pipeline and editors.

1. 2026-06-15 Score Agent Friendliness: 55 → 65
2. 2026-06-15 Score Docs Quality: 35 → 55
3. 2026-06-15 API Reference URL: (none) → https://developer.vonage.com/en/reference
4. 2026-06-15 Robots Allows Agents: (none) → Yes
5. 2026-06-15 Has Structured Data: (none) → No
6. 2026-06-14 Score Agent Friendliness: 40 → 55
7. 2026-06-14 Score Docs Quality: 0 → 35
8. 2026-06-14 Llms Txt URL: (none) → https://developer.vonage.com/llms.txt
9. 2026-06-14 Changelog URL: (none) → https://developer.vonage.com/changelog
10. 2026-06-14 Rendering: (none) → static
11. 2026-06-14 Llms Txt Present: (none) → Yes
12. 2026-06-14 Docs URL: (none) → https://developer.vonage.com
13. 2026-06-10 Last Verified At: 2026-06-06T00:00:00.000Z → 2026-06-10T00:00:00.000Z
14. 2026-06-10 Scoring Methodology: (none) → Scores are computed deterministically from this profile's published, sourced fi…
15. 2026-06-10 Avoid If: (none) → You want to try it free before paying
16. 2026-06-10 Best For: (none) → Regulated or enterprise workloads - compliance attestations and an enterprise p…
17. 2026-06-10 Score Trust Readiness: (none) → 85
18. 2026-06-10 Score Procurement Friction: (none) → 85
19. 2026-06-10 Score Docs Quality: (none) → 0
20. 2026-06-10 Score Setup Speed: (none) → 75
21. 2026-06-10 Score Agent Friendliness: (none) → 40
22. 2026-06-10 Score Pricing Transparency: (none) → 85
23. 2026-06-10 Starting Price Usd: 0.0081 → 0.00809
24. 2026-06-10 SDK Packages: Node.js, Python, Java, .NET, Ruby, PHP → Node.js, Python, Java, .NET, Ruby, PHP
25. 2026-06-10 HIPAA: set to Yes
26. 2026-06-10 ISO 27001: set to Yes
27. 2026-06-10 PCI DSS: set to Yes
28. 2026-06-10 SLA Published: set to Yes
29. 2026-06-10 Data Retention Policy URL: set to https://api.support.vonage.com/hc/en-us/articles/360001183228-How-long-does-Von…
30. 2026-06-10 Documented Rate Limits: set to due to carrier restrictions, the rate limit for outbound SMS can be as low as o…
31. 2026-06-10 Rate Limit Requests: set to 30
32. 2026-06-10 Rate Limit Window: set to second
33. 2026-06-10 Known Restrictions: set to due to carrier restrictions, the rate limit for outbound SMS can be as low as o…
34. 2026-06-10 Auth Methods: set to api_key, basic
35. 2026-06-10 Auth Docs URL: set to https://developer.vonage.com/en/getting-started/concepts/authentication
36. 2026-06-10 API Style: set to rest
37. 2026-06-10 Base URL: set to https://rest.nexmo.com
38. 2026-06-10 Versioning Scheme: set to none
39. 2026-06-10 Stability: set to ga
40. 2026-06-10 MCP URL: set to https://documentation-mcp.vonage.dev/mcp
41. 2026-06-10 Quickstart URL: set to https://developer.vonage.com/en/messaging/sms/code-snippets/send-an-sms
42. 2026-06-10 Error Format: set to vendor-specific
43. 2026-06-10 Webhook Signing: set to hmac_sha256
44. 2026-06-10 Webhook Events URL: set to https://developer.vonage.com/en/messaging/sms/guides/delivery-receipts
45. 2026-06-10 Requires Verification: set to No
46. 2026-06-10 Starting Price Usd: set to 0.0081
47. 2026-06-10 Price Basis: set to message
48. 2026-06-10 Free Tier Limit: set to €2 free credit
49. 2026-06-10 Slug: set to vonage-sms
50. 2026-06-10 Fields Not Found: set to gdpr, ga_date, launched_at, idempotency_supported, api_version, deprecation_pol…

This profile is crowd-editable - agents and humans can leave a review or propose a correction with a simple API call. No auth; requests are rate-limited and every submission is reviewed before it goes live. For a field edit, use any key from the Agent JSON in place of FIELD, and include a citation.

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