{ "name": "Retell AI", "slug": "retell-ai", "website_url": "https://www.retellai.com", "vendor_description": "\"#1 AI Voice Agent Platform for Automating Calls\"", "categories": [ "voice-agents" ], "summary": "Retell AI is a voice agent platform for automating phone calls, supporting both inbound and outbound use cases such as customer support, appointment booking, lead qualification, and call center operations. Pricing is usage-based at $0.055 per minute with a $10 free credit on signup, and an enterprise plan is available for higher-volume needs. The REST API supports bring-your-own LLM and voice, SIP trunking, WebRTC web calling, and function calling, with SDKs for Python, Node.js, and browser JavaScript. The platform holds SOC 2 Type II certification and is HIPAA and GDPR compliant, though it currently operates only from US-based infrastructure.", "capabilities": { "supported_actions": [ "realtime_conversation", "inbound_telephony", "outbound_telephony", "sip_trunking", "web_calling_webrtc", "call_transfer", "function_calling", "tool_calling", "interruption_handling", "byo_llm", "byo_voice", "knowledge_base", "batch_calling", "call_recording", "call_analytics", "post_call_analysis", "ai_quality_assurance", "pii_redaction", "dtmf_capture", "ivr_navigation", "dynamic_variable_injection", "webhooks", "mcp_server", "simulation_testing", "voice_cloning", "safety_guardrails", "voicemail_detection", "ab_testing", "agent_versioning" ], "supported_regions": [ "United States", "Canada", "International (via custom SIP/BYO telephony)" ], "supported_languages": [ "English (US)", "English (India)", "English (UK)", "English (Australia)", "English (New Zealand)", "Spanish (Spain)", "Spanish (Latin America)", "French", "Chinese (Mandarin)", "German", "Hindi", "Japanese", "Portuguese (Portugal)", "Portuguese (Brazil)", "Russian", "Italian", "Korean", "Dutch", "Dutch (Belgium)", "Polish", "Turkish", "Vietnamese", "Romanian", "Danish", "Finnish", "Greek", "Indonesian", "Norwegian", "Slovak", "Swedish", "Bulgarian", "Hungarian", "Malay", "Catalan", "Thai", "50+ languages total (dashboard is source of truth; list expands continuously)" ], "input_types": [ "PSTN phone call", "SIP", "WebRTC", "web widget", "audio stream" ], "output_types": [ "audio stream", "call transcript", "webhook events", "call recording", "structured call summary", "post-call analysis", "SMS" ], "webhooks_supported": true, "sandbox_available": false, "sdk_languages": [ "Python", "Node.js", "JavaScript (browser/client)" ], "mcp_server_available": true }, "integration": { "api_style": "rest", "base_url": "https://api.retellai.com", "api_version": "v2", "versioning_scheme": "url", "stability": "ga", "deprecation_policy_url": "https://docs.retellai.com/deprecation-notice/5-30", "auth_methods": [ "api_key" ], "auth_docs_url": "https://docs.retellai.com/accounts/api-keys-overview", "idempotency_supported": false, "error_format": "vendor-specific JSON: {\"status\": \"error\", \"message\": \"...\"}", "webhook_signing": "hmac_sha256", "webhook_events_url": "https://docs.retellai.com/features/webhook", "rate_limit_requests": 20, "rate_limit_window": "concurrent calls", "sdk_packages": [ { "package": "retell-sdk", "language": "Python", "official": true, "repo_url": "https://github.com/RetellAI/retell-python-sdk" }, { "package": "retell-sdk", "language": "Node.js", "official": true, "repo_url": "https://github.com/RetellAI/retell-typescript-sdk" }, { "package": "retell-client-js-sdk", "language": "JavaScript (browser/client)", "official": true, "repo_url": "https://github.com/RetellAI/retell-client-js-sdk" } ], "mcp_url": "https://mcp.retellai.com", "quickstart_url": "https://docs.retellai.com/get-started/quick-start" }, "pricing": { "pricing_model": "usage_based", "has_published_pricing": true, "starting_price_usd": "0.0550", "price_basis": "minute", "free_tier_available": false, "free_tier_limit": "$10 free credit", "free_tier_details": "$10 one-time trial credit on sign-up (not a recurring free tier)", "minimum_commitment": null, "self_serve_signup": true, "requires_sales_call": false, "requires_verification": true, "enterprise_plan_available": true, "price_points": [ { "plan": "Pay As You Go", "item": "Voice agent all-in rate (low end)", "amount_usd": "0.0700", "amount_percent": null, "per": "minute", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "Voice agent all-in rate (high end)", "amount_usd": "0.3100", "amount_percent": null, "per": "minute", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "Retell voice infrastructure (platform/orchestration fee)", "amount_usd": "0.0550", "amount_percent": null, "per": "minute", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "TTS — Retell Platform Voices / Minimax / Fish / Cartesia / OpenAI", "amount_usd": "0.0150", "amount_percent": null, "per": "minute", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "TTS — ElevenLabs voices", "amount_usd": "0.0400", "amount_percent": null, "per": "minute", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "LLM — GPT 5.5", "amount_usd": "0.1600", "amount_percent": null, "per": "minute", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "LLM — GPT 5.4", "amount_usd": "0.0800", "amount_percent": null, "per": "minute", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "LLM — GPT 5.2", "amount_usd": "0.0560", "amount_percent": null, "per": "minute", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "LLM — GPT 5.1 / GPT 5", "amount_usd": "0.0400", "amount_percent": null, "per": "minute", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "LLM — Claude 4.6/4.5 Sonnet", "amount_usd": "0.0800", "amount_percent": null, "per": "minute", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "LLM — Claude 4.5 Haiku", "amount_usd": "0.0250", "amount_percent": null, "per": "minute", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "LLM — Gemini 3.0 Flash", "amount_usd": "0.0270", "amount_percent": null, "per": "minute", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "LLM — Gemini 2.5 Flash", "amount_usd": "0.0350", "amount_percent": null, "per": "minute", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "Telephony — US (Twilio/Telnyx)", "amount_usd": "0.0150", "amount_percent": null, "per": "minute", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "Telephony — SIP trunking / custom telephony (BYO)", "amount_usd": "0.0000", "amount_percent": null, "per": "minute", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "Knowledge base add-on", "amount_usd": "0.0050", "amount_percent": null, "per": "minute", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "Knowledge base subscription (first 10 free)", "amount_usd": "8.0000", "amount_percent": null, "per": "knowledge base/month", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "Safety Guardrails add-on", "amount_usd": "0.0050", "amount_percent": null, "per": "minute", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "Advanced Denoising add-on", "amount_usd": "0.0050", "amount_percent": null, "per": "minute", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "PII Removal add-on", "amount_usd": "0.0100", "amount_percent": null, "per": "minute", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "AI Quality Assurance (first 100 min/month free, then)", "amount_usd": "0.1000", "amount_percent": null, "per": "minute", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "Batch call dial fee", "amount_usd": "0.0050", "amount_percent": null, "per": "dial", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "Branded Call ID add-on", "amount_usd": "0.1000", "amount_percent": null, "per": "outbound call", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "Burst concurrency surcharge (calls exceeding limit)", "amount_usd": "0.1000", "amount_percent": null, "per": "minute (entire call duration)", "currency": "USD", "source_url": "https://docs.retellai.com/deploy/concurrency" }, { "plan": "Pay As You Go", "item": "Additional concurrent calls (beyond 20 free)", "amount_usd": "8.0000", "amount_percent": null, "per": "concurrent line/month", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "Phone number", "amount_usd": "2.0000", "amount_percent": null, "per": "number/month", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "Retell SMS", "amount_usd": "20.0000", "amount_percent": null, "per": "month", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "Verified phone number (recurring)", "amount_usd": "10.0000", "amount_percent": null, "per": "phone number/month", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Pay As You Go", "item": "Verified phone number (one-time setup fee)", "amount_usd": "10.0000", "amount_percent": null, "per": "phone number", "currency": "USD", "source_url": "https://www.retellai.com/pricing" }, { "plan": "Enterprise", "item": "Voice agent orchestration", "amount_usd": null, "amount_percent": null, "per": "minute (custom)", "currency": "USD", "source_url": "https://www.retellai.com/pricing" } ] }, "compliance": { "soc2": "type_2", "hipaa": true, "gdpr": true, "iso_27001": false, "pci_dss": false, "sla_published": true, "sla_url": "https://www.retellai.com/legal/terms-of-service", "data_retention_policy_url": "https://docs.retellai.com/accounts/data-retention", "documented_rate_limits": "Pay-as-you-go plan includes 20 free concurrent calls; additional concurrent call capacity at $8/concurrent call/month. Burst mode allows temporarily exceeding the limit at a $0.10/min surcharge for the entire call duration (burst cap = lower of 3× limit or limit + 300). Max call duration is 1 hour (expandable to 2 hours). Enterprise plan: no cap, custom options starting at 50+ concurrent calls.", "known_restrictions": [ "Services not currently operational within the EU (GDPR compliant via AWS but US-region only)", "Not designed for medical, emergency, aviation, nuclear, or safety-critical environments", "Cannot submit HIPAA/PCI/biometric data without a signed BAA or express authorization", "Reselling AI-generated voices as standalone products is prohibited", "TCPA, FCC, and Do-Not-Call compliance is the customer's responsibility" ] }, "developer": { "docs_url": "https://docs.retellai.com/general/introduction", "api_reference_url": null, "openapi_spec_url": null, "postman_collection_url": null, "changelog_url": "https://www.retellai.com/changelog", "status_page_url": "https://status.retellai.com", "llms_txt_url": "https://www.retellai.com/llms.txt", "markdown_docs_url": null, "rendering": "static" }, "adoption": { "launched_at": "2023-01-01", "ga_date": "2024-02-01", "github_stars": null, "github_stars_at": null, "notable_customers": [ "Lenovo", "Asbury Auto", "Anker", "StorageVault" ] }, "scores": { "agent_friendliness": 65, "pricing_transparency": 85, "setup_speed": 60, "docs_quality": 35, "procurement_friction": 85, "trust_readiness": 75, "best_for": [ "Regulated or enterprise workloads - compliance attestations and an enterprise plan", "AI agents and automation - an agent-ready surface (MCP / llms.txt)", "Teams needing broad API coverage out of the box" ], "avoid_if": [ "You want to try it free before paying" ] }, "sources": [ { "field": "sla_published", "url": "https://docs.retellai.com/reliability/reliability-overview", "excerpt": "Retell guarantees >99.9% uptime", "confidence": "high" }, { "field": "known_restrictions", "url": "https://www.retellai.com/legal/terms-of-service", "excerpt": "Services not designed for medical, emergency, aviation, nuclear, or safety-critical environments. Cannot submit heightened-security data (HIPAA, PCI DSS, biometric data) unless expressly authorized or covered by a BAA.", "confidence": "high" }, { "field": "supported_regions", "url": "https://www.retellai.com/blog/enterprise-voice-ai-compliance-guide", "excerpt": "Call processing occurs in US regions (AWS US-East/US-West)", "confidence": "high" }, { "field": "output_types", "url": "https://docs.retellai.com/llms.txt", "excerpt": "Call recording with secure URL expiration. Post-call analysis with custom field extraction. Webhook-based event delivery. Three event types: call_started, call_ended, call_analyzed.", "confidence": "high" }, { "field": "auth_methods", "url": "https://docs.retellai.com/api-references/create-phone-call", "excerpt": "Authorization: Bearer YOUR_API_KEY", "confidence": "high" }, { "field": "api_version", "url": "https://docs.retellai.com/api-references/create-phone-call", "excerpt": "Endpoint Path: /v2/create-phone-call", "confidence": "high" }, { "field": "sdk_packages", "url": "https://docs.retellai.com/get-started/sdk", "excerpt": "Official clients for Node.js and Python with typed clients, simplified API key auth, structured error handling", "confidence": "high" }, { "field": "sdk_packages", "url": "https://www.npmjs.com/package/retell-client-js-sdk", "excerpt": "retell-client-js-sdk; a frontend JavaScript SDK that abstracts away the details of capturing microphone input", "confidence": "high" }, { "field": "mcp_url", "url": "https://www.retellai.com/blog/connect-retell-ai-mcp-server-to-ai-assistant", "excerpt": "claude mcp add --transport http retell https://mcp.retellai.com", "confidence": "high" }, { "field": "error_format", "url": "https://docs.retellai.com/api-references/get-voice", "excerpt": "{\"status\": \"error\", \"message\": \"API key is missing or invalid.\"}", "confidence": "high" }, { "field": "webhook_signing", "url": "https://docs.retellai.com/features/webhook", "excerpt": "You can use the x-retell-signature header together with your Retell API Key to verify the webhook", "confidence": "high" }, { "field": "rate_limit_requests", "url": "https://docs.retellai.com/deploy/concurrency", "excerpt": "Pay-As-You-Go workspaces are allocated a quota of 20 concurrent calls by default", "confidence": "high" }, { "field": "requires_verification", "url": "https://docs.retellai.com/accounts/kyc", "excerpt": "Before you can make outbound calls with Retell, you'll need to complete KYC (Know Your Customer) verification", "confidence": "high" }, { "field": "data_retention_policy_url", "url": "https://docs.retellai.com/accounts/data-retention", "excerpt": "By default, data is kept indefinitely (no automatic deletion). Retention periods available: 1 day, 3 days, 7 days, 30 days, 60 days, 90 days, 180 days, 365 days, and 730 days (2 years)", "confidence": "high" }, { "field": "price_basis", "url": "https://www.retellai.com/pricing", "excerpt": "Voice AI Agents: $0.07–$0.31 per minute (rates vary by LLM selection)", "confidence": "high" }, { "field": "launched_at", "url": "https://www.retellai.com/about-us", "excerpt": "Y Combinator Acceptance: November 2023", "confidence": "medium" }, { "field": "notable_customers", "url": "https://tracxn.com/d/companies/retell/__qAFnbwN7vHuMUKADfyXxnzuEXs4E8UwpfKZrjdIsu_Y", "excerpt": "Customers of Retell AI include Lenovo and Asbury Auto. Early customers include Anker, Asbury Auto and StorageVault", "confidence": "medium" }, { "field": "idempotency_supported", "url": "https://docs.retellai.com/api-references/create-phone-call", "excerpt": "Idempotency Support: Not mentioned in the documentation", "confidence": "low" }, { "field": "vendor_description", "url": "https://www.retellai.com", "excerpt": "#1 AI Voice Agent Platform for Automating Calls", "confidence": "high" }, { "field": "supported_actions", "url": "https://docs.retellai.com/llms.txt", "excerpt": "Inbound and outbound calling on Retell-managed or imported numbers. SIP integration via elastic SIP trunking with providers (Twilio, Telnyx, Vonage, Genesys, Five9, Avaya). Web calling through WebRTC with the Retell Web SDK. Call transfer (warm/cold) to humans or other AI agents. Batch calling for campaign outreach. Function calling (tool use) for API integration mid-call. Interruption handling with configurable sensitivity. Bring-your-own-LLM via WebSocket integration. Custom voice support (cloning, community voices, platform voices). Call recording with secure URL expiration.", "confidence": "high" }, { "field": "supported_languages", "url": "https://community.retellai.com/t/22-new-languages-thats-50-live-for-all-retell-customers/163", "excerpt": "We just shipped 22 new languages, that's 50+ Live for all Retell customers", "confidence": "high" }, { "field": "mcp_server_available", "url": "https://docs.retellai.com/get-started/mcp-server", "excerpt": "Retell supports the Model Context Protocol (MCP) so you can build Retell AI voice agents directly from MCP-capable clients.", "confidence": "high" }, { "field": "webhooks_supported", "url": "https://docs.retellai.com/features/webhook", "excerpt": "call_started, call_ended, call_analyzed, transcript_updated, transfer_started, transfer_bridged, transfer_cancelled, transfer_ended, chat_started, chat_ended, chat_analyzed", "confidence": "high" }, { "field": "pricing_model", "url": "https://www.retellai.com/pricing", "excerpt": "Voice Infrastructure: $0.055/min", "confidence": "high" }, { "field": "free_tier_available", "url": "https://www.retellai.com/pricing", "excerpt": "$10 in free credits with full platform access, no commitments", "confidence": "high" }, { "field": "enterprise_plan_available", "url": "https://www.retellai.com/pricing", "excerpt": "Enterprise Plan: Custom Pricing for both voice and chat agents. Concurrent Calls: No cap; custom options starting 50+ calls. Additional Features: Dedicated implementation support, custom MSA/DPA terms, role-based access control, dedicated stable server, custom SSO, 24/7 Omnichannel Support with Dedicated Portal.", "confidence": "high" }, { "field": "documented_rate_limits", "url": "https://docs.retellai.com/deploy/concurrency", "excerpt": "Calls that exceed your normal limit (but stay within the burst limit) will proceed with an $0.10/min surcharge applied to the entire call duration. Burst capacity is calculated as the lower of 3× your limit or your limit + 300.", "confidence": "high" }, { "field": "soc2", "url": "https://www.retellai.com", "excerpt": "HIPAA, SOC2 Type II, and GDPR compliance", "confidence": "high" }, { "field": "hipaa", "url": "https://www.retellai.com/blog/hipaa-compliant-voice-ai-without-enterprise-contract", "excerpt": "HIPAA compliance is not gated to enterprise. Every Retell account, including pay-as-you-go, can operate as a HIPAA-eligible workload once a BAA is in place.", "confidence": "high" }, { "field": "gdpr", "url": "https://docs.retellai.com/general/compliance", "excerpt": "we do not currently operate services within the European Union", "confidence": "high" }, { "field": "pci_dss", "url": "https://docs.retellai.com/general/compliance", "excerpt": "HIPAA compliant, GDPR compliant, SOC 2 Type 1 & Type 2 certified", "confidence": "high" }, { "field": "primary_use_cases", "url": "https://www.retellai.com", "excerpt": "Lead qualification, Customer support and receptionists, Appointment booking, Dispatch services, Debt collection, Outbound batch calling campaigns", "confidence": "high" }, { "field": "supported_actions", "url": "https://docs.retellai.com/deploy/concurrency", "excerpt": "Calls that exceed your normal limit (but stay within the burst limit) will proceed with an $0.10/min surcharge applied to the entire call duration.", "confidence": "high" }, { "field": "supported_languages", "url": "https://www.retellai.com/blog/how-to-use-ai-phone-agents-for-multilingual-communication", "excerpt": "Retell AI currently supports 31+ languages, including: English (US, India, UK, Australia, New Zealand), Spanish (Spain, Latin America), French, Chinese, German, Hindi, Japanese, Portuguese (Portugal, Brazil), Russian, Italian, Korean, Dutch, Dutch (Belgium), Polish, Turkish, Vietnamese, Romanian, Danish, Finnish, Greek, Indonesian, Norwegian, Slovak, Swedish, Bulgarian, Hungarian, Malay, Catalan, and Thai.", "confidence": "high" }, { "field": "sdk_languages", "url": "https://docs.retellai.com/llms.txt", "excerpt": "Retell provides official SDKs for Node.js and Python, offering typed clients, simplified API key auth, structured error handling, and full coverage of voice and chat endpoints.", "confidence": "high" }, { "field": "pricing_model", "url": "https://www.retellai.com/pricing", "excerpt": "$0.07-$0.31 / min for AI Voice Agents", "confidence": "high" }, { "field": "has_published_pricing", "url": "https://www.retellai.com/pricing", "excerpt": "Voice Agent Rate: $0.07-$0.31 / min for AI Voice Agents. Voice Infrastructure: $0.055/minute. Text-to-Speech Options: $0.015-$0.040/minute. LLM Costs: Range from $0.003/minute to $0.16/minute. Telephony: $0.015/min for US.", "confidence": "high" }, { "field": "free_tier_available", "url": "https://www.retellai.com/pricing", "excerpt": "The $10 appears to be a one-time trial allowance for new users. There is no mention of recurring monthly free minutes.", "confidence": "high" }, { "field": "documented_rate_limits", "url": "https://docs.retellai.com/deploy/concurrency", "excerpt": "Pay-As-You-Go workspaces are allocated a quota of 20 concurrent calls by default", "confidence": "high" }, { "field": "soc2", "url": "https://docs.retellai.com/general/compliance", "excerpt": "SOC 2 Type 1 & Type 2 certified", "confidence": "high" }, { "field": "hipaa", "url": "https://docs.retellai.com/general/compliance", "excerpt": "HIPAA compliant. Our BAA and DPA agreements are available for self signing.", "confidence": "high" }, { "field": "gdpr", "url": "https://docs.retellai.com/general/compliance", "excerpt": "GDPR compliant. Retell leverages AWS infrastructure, which includes a GDPR-compliant Data Processing Addendum.", "confidence": "high" }, { "field": "iso_27001", "url": "https://docs.retellai.com/general/compliance", "excerpt": "HIPAA compliant, GDPR compliant, SOC 2 Type 1 & Type 2 certified", "confidence": "high" }, { "field": "sla_published", "url": "https://www.retellai.com/legal/terms-of-service", "excerpt": "Retell AI shall use commercially reasonable efforts to maintain at least 99.5% uptime for the Services, excluding scheduled maintenance windows (not to exceed six (6) hours per month) and events of force majeure", "confidence": "high" }, { "field": "known_restrictions", "url": "https://docs.retellai.com/general/compliance", "excerpt": "we do not currently operate services within the European Union", "confidence": "high" }, { "field": "supported_regions", "url": "https://docs.retellai.com/general/compliance", "excerpt": "we do not currently operate services within the European Union", "confidence": "high" }, { "field": "input_types", "url": "https://docs.retellai.com/llms.txt", "excerpt": "Inbound and outbound calling on Retell-managed or imported numbers. SIP integration via elastic SIP trunking with providers. Web calling through WebRTC with the Retell Web SDK.", "confidence": "high" }, { "field": "auth_methods", "url": "https://docs.retellai.com/accounts/api-keys-overview", "excerpt": "API keys authenticate your Retell REST API requests, SDK integrations, and webhook endpoints", "confidence": "high" }, { "field": "base_url", "url": "https://docs.retellai.com/api-references/get-voice", "excerpt": "Base URL: https://api.retellai.com", "confidence": "high" }, { "field": "versioning_scheme", "url": "https://docs.retellai.com/api-references/create-phone-call", "excerpt": "Endpoint Path: /v2/create-phone-call", "confidence": "high" }, { "field": "sdk_packages", "url": "https://github.com/RetellAI/retell-python-sdk", "excerpt": "PyPI Package Name: retell-sdk; officially maintained by RetellAI, latest release v5.51.0 as of June 17, 2026", "confidence": "high" }, { "field": "mcp_url", "url": "https://docs.retellai.com/get-started/mcp-server", "excerpt": "Official Endpoint: https://mcp.retellai.com; your MCP client connects to Retell's hosted MCP endpoint over HTTP, authenticates with your Retell API key", "confidence": "high" }, { "field": "quickstart_url", "url": "https://docs.retellai.com/get-started/quick-start", "excerpt": "Create your first phone agent in 5 minutes", "confidence": "high" }, { "field": "webhook_signing", "url": "https://docs.retellai.com/features/secure-webhook", "excerpt": "the HMAC-SHA256 hex digest of the raw request body concatenated with the timestamp", "confidence": "high" }, { "field": "webhook_events_url", "url": "https://docs.retellai.com/features/webhook", "excerpt": "call_started, call_ended, call_analyzed, transcript_updated, transfer_started, transfer_bridged, transfer_cancelled, transfer_ended, chat_started, chat_ended, chat_analyzed", "confidence": "high" }, { "field": "rate_limit_window", "url": "https://docs.retellai.com/deploy/concurrency", "excerpt": "Concurrency refers to the number of simultaneous active voice calls that can be handled by your system at any given moment", "confidence": "high" }, { "field": "sla_url", "url": "https://www.retellai.com/legal/terms-of-service", "excerpt": "Retell AI shall use commercially reasonable efforts to maintain at least 99.5% uptime for the Services, excluding scheduled maintenance windows (not to exceed six (6) hours per month) and events of force majeure", "confidence": "high" }, { "field": "starting_price_usd", "url": "https://www.retellai.com/pricing", "excerpt": "Voice Infrastructure: $0.055/min", "confidence": "high" }, { "field": "free_tier_limit", "url": "https://www.retellai.com/pricing", "excerpt": "Starting price: $0 with $10 in free credits; Free concurrent calls: 20 included", "confidence": "high" }, { "field": "ga_date", "url": "https://www.retellai.com/about-us", "excerpt": "Public Launch: February 2024 (Hacker News and ProductHunt)", "confidence": "medium" }, { "field": "deprecation_policy_url", "url": "https://docs.retellai.com/deprecation-notice/5-30", "excerpt": "Retell will deprecate the old single-agent phone number fields", "confidence": "medium" } ], "fields_not_found": [ "iso_27001 (compliance page exists but does not mention it)", "pci_dss (compliance page exists but does not mention it)", "sandbox_available (no dedicated test environment; simulation testing exists in live environment)", "ga_date_exact", "idempotency_supported_confirmed" ], "source_confidence": "high", "last_verified_at": "2026-06-21T00:00:00.000Z", "contribute": { "note": "This data is crowd-editable. Suggest corrections or leave a review via these endpoints - no auth required, requests are rate-limited, and every submission is reviewed before it goes live. For a field edit, {field} is any key in this response and a citation is required.", "endpoints": [ { "action": "review", "label": "Leave a review or comment", "method": "POST", "url": "https://apio.sh/api/feedback/retell-ai", "example_body": { "kind": "review", "rating": 5, "body": "Your experience with this API…" } }, { "action": "field_edit", "label": "Suggest a correction to a field (cite a source)", "method": "POST", "url": "https://apio.sh/api/suggest/retell-ai/{field}", "example_body": { "value": "corrected value", "citations": [ { "url": "https://source.example/page", "excerpt": "supporting quote" } ], "note": "what changed and why" } }, { "action": "new_api", "label": "Suggest a new API to add (only name is required - send as much as you can cite)", "method": "POST", "url": "https://apio.sh/api/suggest/api", "example_body": { "value": { "name": "Acme Email API", "website_url": "https://acme.example", "vendor_name": "Acme", "categories": [ "email" ], "pricing_model": "usage_based", "has_published_pricing": true, "free_tier_available": true, "price_points": [ { "plan": "Pay as you go", "item": "1,000 emails", "amount_usd": 1, "per": "1,000 emails", "source_url": "https://acme.example/pricing" } ], "soc2": "type_2", "docs_url": "https://docs.acme.example" }, "citations": [ { "url": "https://acme.example/pricing", "excerpt": "$1 per 1,000 emails" } ] }, "value_schema": [ { "field": "name", "type": "string", "label": "Product name (the only required field)" }, { "field": "website_url", "type": "string", "label": "Marketing website URL" }, { "field": "vendor_name", "type": "string", "label": "Company/vendor name behind the product" }, { "field": "vendor_description", "type": "string", "label": "One-line description, quoted from the vendor" }, { "field": "categories", "type": "string[]", "label": "Category/leaf slugs it belongs to, e.g. [\"email\",\"sms\"]" }, { "field": "primary_use_cases", "type": "string[]", "label": "What it's used for" }, { "field": "supported_actions", "type": "string[]", "label": "Concrete API actions/capabilities" }, { "field": "supported_regions", "type": "string[]", "label": "Countries/regions/data-residency" }, { "field": "supported_languages", "type": "string[]", "label": "Human/spoken languages supported" }, { "field": "input_types", "type": "string[]", "label": "Accepted input types/formats" }, { "field": "output_types", "type": "string[]", "label": "Produced output types/formats" }, { "field": "webhooks_supported", "type": "bool", "label": "Supports webhooks?" }, { "field": "sandbox_available", "type": "bool", "label": "Dedicated sandbox/test mode?" }, { "field": "sdk_languages", "type": "string[]", "label": "Languages with an official SDK" }, { "field": "mcp_server_available", "type": "bool", "label": "Official MCP server?" }, { "field": "pricing_model", "type": "enum", "label": "Pricing model", "values": [ "usage_based", "subscription", "seat_based", "hybrid", "contact_sales" ] }, { "field": "has_published_pricing", "type": "bool", "label": "Concrete prices published publicly?" }, { "field": "free_tier_available", "type": "bool", "label": "Recurring/perpetual free tier (not a trial)?" }, { "field": "free_tier_details", "type": "string", "label": "What the free tier includes" }, { "field": "minimum_commitment", "type": "string", "label": "Any stated minimum spend/commitment" }, { "field": "self_serve_signup", "type": "bool", "label": "Get an API key without talking to sales?" }, { "field": "requires_sales_call", "type": "bool", "label": "Does going live require sales?" }, { "field": "enterprise_plan_available", "type": "bool", "label": "Named enterprise tier?" }, { "field": "starting_price_usd", "type": "number", "label": "Lowest published paid entry price (USD number)" }, { "field": "price_basis", "type": "string", "label": "Unit the starting price is per, e.g. '1,000 emails'" }, { "field": "free_tier_limit", "type": "string", "label": "Free-tier ceiling in literal terms" }, { "field": "price_points", "type": "object[]", "label": "Structured prices: [{plan,item,amount_usd,amount_percent,per,source_url}]" }, { "field": "soc2", "type": "enum", "label": "SOC 2 status", "values": [ "type_2", "type_1", "in_progress", "none", "unknown" ] }, { "field": "hipaa", "type": "bool", "label": "HIPAA (e.g. BAA available)?" }, { "field": "gdpr", "type": "bool", "label": "GDPR compliance stated?" }, { "field": "iso_27001", "type": "bool", "label": "ISO 27001 certified?" }, { "field": "pci_dss", "type": "bool", "label": "PCI DSS compliant?" }, { "field": "sla_published", "type": "bool", "label": "Published SLA / uptime commitment?" }, { "field": "documented_rate_limits", "type": "string", "label": "Documented rate limits, quoted" }, { "field": "known_restrictions", "type": "string[]", "label": "Notable documented restrictions/limits" }, { "field": "auth_methods", "type": "string[]", "label": "Auth methods", "values": [ "api_key", "oauth2", "jwt", "basic", "hmac_signature", "mtls", "session" ] }, { "field": "api_style", "type": "enum", "label": "Primary API style", "values": [ "rest", "graphql", "grpc", "soap", "websocket" ] }, { "field": "base_url", "type": "string", "label": "API root/base URL" }, { "field": "api_version", "type": "string", "label": "Current API version string" }, { "field": "quickstart_url", "type": "string", "label": "Quickstart / hello-world URL" }, { "field": "docs_url", "type": "string", "label": "Developer docs URL" }, { "field": "api_reference_url", "type": "string", "label": "API reference URL" }, { "field": "openapi_spec_url", "type": "string", "label": "OpenAPI spec URL" }, { "field": "changelog_url", "type": "string", "label": "Changelog URL" }, { "field": "status_page_url", "type": "string", "label": "Status page URL" }, { "field": "notable_customers", "type": "string[]", "label": "Named public customers" }, { "field": "launched_at", "type": "string", "label": "Launch date (ISO date or year)" } ] }, { "action": "token", "label": "Optional - raise your rate limit", "method": "GET", "url": "https://apio.sh/api/feedback/token" } ] } }