{"category":{"id":"voice-agents-telephony","name":"Voice agents and telephony","description":"Place and receive phone calls handled by AI voice agents, real-time audio/video rooms."},"entries":[
{"id":"bland-ai","name":"Bland AI","homepage":"https://www.bland.ai","docs":"https://docs.bland.ai/api-v1/","auth":"api_key","auth_hint":"Authorization: Bearer <api_key> header (bare key without prefix still accepted)","mcp":{"type":"official","url":"https://api.bland.ai/v1/mcp","maintainer":"vendor","remote_url":"https://api.bland.ai/v1/mcp","tools":["create_call","wait_for_call","stop_call","get_call_log","list_voices","validate_pathway","get_pathway_schema","get_pathway_context","query_analytics","search_bland_docs","get_bland_doc","bland_api_get","call_bland_api"],"covers_full_api":true,"source_url":"https://docs.bland.ai/integrations/mcp/overview","checked_at":"2026-09-24","domain_verified":true,"kind":"vendor-hosted","config":{"transport":"streamable-http","url":"https://api.bland.ai/v1/mcp","headers":{"Authorization":"Bearer $BLAND_API_KEY"},"oauth":false,"docs_only":false,"source_url":"https://docs.bland.ai/integrations/mcp/overview","checked_at":"2026-09-24"}},"free_tier":"free credits + inbound number on signup (Start plan), no credit card required","sdk":[],"openapi":null,"llms_txt":"https://docs.bland.ai/llms.txt","desc_en":"Programmatically create AI phone agents and place/manage automated outbound and inbound calls.","notes":"MCP server rate-limited to 120 req/min/org; distinguishes read-only vs destructive operations.","verified":"2026-09-24","free_plan":{"kind":"free_tier","requires_card":false,"quota":"2 credits + an inbound number; 100 calls/day, 10 concurrent calls","source_url":"https://www.bland.ai/pricing","checked_at":"2026-09-24"},"auth_scheme":{"type":"http","scheme":"bearer","format":"Authorization: Bearer <BLAND_API_KEY> (bare key without prefix also accepted)","source_url":"https://docs.bland.ai/api-v1/post/calls","checked_at":"2026-09-24"},"base_url":"https://api.bland.ai/v1","rate_limits":{"summary":"Start plan: 100 calls/day, 100 calls/hour, 10 concurrent calls; MCP server 120 req/min per org","source_url":"https://www.bland.ai/pricing","checked_at":"2026-09-24"},"async_jobs":{"value":true,"how":"POST /v1/calls returns call_id; poll call status/logs or pass webhook to receive the call object when it ends","source_url":"https://docs.bland.ai/platform/agent-quickstart"},"operations":["voice-agent","phone-calls"],"no_auth":false,"call":{"operation":"place an outbound AI phone call","method":"POST","url":"https://api.bland.ai/v1/calls","example":"curl https://api.bland.ai/v1/calls -H \"Authorization: Bearer $BLAND_API_KEY\" -H \"Content-Type: application/json\" -d '{\"phone_number\": \"+15555550123\", \"task\": \"You are a customer service agent calling about an account update.\"}'","response_fields":["status","call_id","message"],"async":"call runs asynchronously; get transcript/outcome via GET https://api.bland.ai/v1/calls/{call_id} or the webhook parameter","source_url":"https://docs.bland.ai/api-v1/post/calls","checked_at":"2026-09-24"},"unit_price":{"summary":"Connected calls: $0.14/min on Start (no platform fee), $0.12/min on Build ($299/mo platform fee)","source_url":"https://www.bland.ai/pricing","checked_at":"2026-09-24"},"has_free_tier":true,"has_trial":false,"no_card":true,"stale":false,"link_check":{"checked_at":"2026-09-24","docs":"ok","mcp":"reachable","llms_txt":"ok"},"uptime":{"window_days":30,"api":{"url":"https://api.bland.ai/v1","probes":1,"up":1,"median_ms":271,"last":{"at":"2026-09-24T18:26Z","up":true,"detail":404}},"mcp_remote":{"url":"https://api.bland.ai/v1/mcp","probes":1,"up":1,"median_ms":339,"last":{"at":"2026-09-24T18:26Z","up":true,"detail":401}}}},
{"id":"deepgram-voice-agent-api","name":"Deepgram Voice Agent API","homepage":"https://deepgram.com","docs":"https://developers.deepgram.com/docs/voice-agent","auth":"api_key","auth_hint":"Authorization: Token <api_key>","mcp":{"type":"official","url":"https://developers.deepgram.com/developer-tools/cli/mcp-server","maintainer":"vendor","repo":"https://cli.deepgram.com","source_url":"https://developers.deepgram.com/developer-tools/cli/mcp-server","checked_at":"2026-09-24","domain_verified":true,"kind":"vendor-hosted","config":{"transport":"streamable-http","url":"https://developers.deepgram.com/developer-tools/cli/mcp-server","derived":true}},"free_tier":"$200 free credit on signup","sdk":["python","javascript","go","csharp"],"openapi":null,"llms_txt":null,"desc_en":"Run a full-duplex speech-to-speech voice agent pipeline (STT+LLM+TTS) over a WebSocket API.","notes":"Primarily an STT/TTS/voice-agent infra layer, often paired with a telephony provider like Twilio to reach phone calls. MCP server built into the dg CLI ('dg mcp', stdio or SSE); docs MCP at https://developers.deepgram.com/_mcp/server.","verified":"2026-09-24","free_plan":{"kind":"trial","requires_card":false,"quota":"$200 credit","period":"one_time","source_url":"https://deepgram.com/pricing","checked_at":"2026-09-24"},"auth_scheme":{"type":"apiKey","in":"header","name":"Authorization","format":"Authorization: Token <DEEPGRAM_API_KEY>","source_url":"https://developers.deepgram.com/reference/authentication","checked_at":"2026-09-24"},"rate_limits":{"summary":"Pay As You Go: up to 45 concurrent Voice Agent WSS connections (60 on Growth); STT 150 WSS / 50 REST; TTS 45","source_url":"https://deepgram.com/pricing","checked_at":"2026-09-24"},"async_jobs":{"value":false,"how":"real-time WebSocket session","source_url":"https://developers.deepgram.com/docs/voice-agent"},"data_policy":{"summary":"Model Improvement Program may keep data for training; opt out per request with mip_opt_out=true (data kept only for processing)","source_url":"https://developers.deepgram.com/docs/the-deepgram-model-improvement-partnership-program","checked_at":"2026-09-24"},"operations":["voice-agent","speech-to-text","text-to-speech"],"no_auth":false,"unit_price":{"summary":"Voice Agent Standard: $0.075 per minute of WebSocket connection (Pay As You Go); BYO TTS $0.065/min, BYO LLM $0.059/min, BYO LLM+TTS $0.050/min","source_url":"https://deepgram.com/pricing","checked_at":"2026-09-24"},"has_free_tier":false,"has_trial":true,"no_card":true,"stale":false,"link_check":{"checked_at":"2026-09-24","docs":"ok"}},
{"id":"elevenlabs-agents-platform","name":"ElevenLabs Agents Platform","homepage":"https://elevenlabs.io/agents","docs":"https://elevenlabs.io/docs/eleven-agents/overview","auth":"api_key","auth_hint":"xi-api-key: <api_key>","mcp":{"type":"official","url":"https://api.elevenlabs.io/v1/mcp","maintainer":"vendor","remote_url":"https://api.elevenlabs.io/v1/mcp","covers_full_api":false,"source_url":"https://elevenlabs.io/docs/eleven-agents/operate/hosted-mcp","checked_at":"2026-09-24","domain_verified":true,"kind":"vendor-hosted","config":{"transport":"streamable-http","url":"https://api.elevenlabs.io/v1/mcp","headers":null,"oauth":true,"docs_only":false,"source_url":"https://elevenlabs.io/docs/eleven-agents/operate/hosted-mcp","checked_at":"2026-09-24"}},"free_tier":"Free plan: 10k credits/month shared across ElevenLabs products; no commercial license (from Starter, $6/month)","sdk":["python","javascript","react","swift","kotlin"],"openapi":"https://api.elevenlabs.io/openapi.json","llms_txt":"https://elevenlabs.io/docs/llms.txt","desc_en":"Build and deploy conversational AI voice agents with telephony (SIP/Twilio) integration via API and SDKs.","notes":"Official hosted MCP server uses OAuth (sign in with ElevenLabs account) rather than a raw API key; core REST API uses api-key auth.","verified":"2026-09-24","free_plan":{"kind":"free_tier","quota":"10k credits","period":"month","source_url":"https://elevenlabs.io/pricing","checked_at":"2026-09-24"},"auth_scheme":{"type":"apiKey","in":"header","name":"xi-api-key","format":"xi-api-key: <ELEVENLABS_API_KEY>","source_url":"https://elevenlabs.io/docs/api-reference/authentication","checked_at":"2026-09-24"},"base_url":"https://api.elevenlabs.io/v1","data_policy":{"summary":"Zero Retention Mode available per agent and for Enterprise API use","source_url":"https://elevenlabs.io/docs/llms.txt","checked_at":"2026-09-24"},"operations":["voice-agent","phone-calls"],"no_auth":false,"call":{"operation":"create a conversational agent","method":"POST","url":"https://api.elevenlabs.io/v1/convai/agents/create","example":"curl -X POST https://api.elevenlabs.io/v1/convai/agents/create -H \"xi-api-key: $ELEVENLABS_API_KEY\" -H 'Content-Type: application/json' -d '{\"conversation_config\":{}}'","response_fields":["agent_id"],"async":null,"source_url":"https://elevenlabs.io/docs/api-reference/agents/create","checked_at":"2026-09-24"},"unit_price":{"summary":"Agents (Speech Engine): $0.08 per minute beyond plan-included minutes, $0.16 per burst minute","source_url":"https://elevenlabs.io/pricing/api","checked_at":"2026-09-24"},"has_free_tier":true,"has_trial":false,"no_card":false,"stale":false,"link_check":{"checked_at":"2026-09-24","docs":"ok","mcp":"reachable","openapi":"ok","llms_txt":"ok"},"uptime":{"window_days":30,"api":{"url":"https://api.elevenlabs.io/v1","probes":1,"up":1,"median_ms":200,"last":{"at":"2026-09-24T18:26Z","up":true,"detail":404}},"mcp_remote":{"url":"https://api.elevenlabs.io/v1/mcp","probes":1,"up":1,"median_ms":275,"last":{"at":"2026-09-24T18:26Z","up":true,"detail":401}}}},
{"id":"livekit-cloud","name":"LiveKit Cloud","homepage":"https://livekit.com","docs":"https://docs.livekit.io/reference/","auth":"api_key","auth_hint":"API key + secret sign a JWT access token sent as Authorization: Bearer <token>","mcp":{"type":"none","url":null,"maintainer":"none","source_url":"https://docs.livekit.io/reference/developer-tools/docs-mcp.md","checked_at":"2026-09-24","domain_verified":null,"kind":"none","config":null},"free_tier":"free Build plan: 1,000 agent session minutes/mo, 5,000 WebRTC participant minutes/mo, 50GB data transfer","sdk":["python","typescript","go","rust","swift","kotlin","ruby"],"openapi":null,"llms_txt":"https://docs.livekit.io/llms.txt","desc_en":"Build and deploy real-time voice AI agents with SIP telephony support using LiveKit's server SDKs and APIs.","notes":"Self-hosted open-source option also exists; Cloud is the managed offering with usage-based billing beyond the free tier.","verified":"2026-09-24","free_plan":{"kind":"free_tier","requires_card":false,"quota":"1,000 agent session min, 5,000 WebRTC participant min, 50GB transfer, $2.50 inference credits","period":"month","source_url":"https://livekit.com/pricing","checked_at":"2026-09-24"},"auth_scheme":{"type":"http","scheme":"bearer","format":"Authorization: Bearer <JWT signed with API key + secret>","source_url":"https://docs.livekit.io/reference/other/roomservice-api.md","checked_at":"2026-09-24"},"rate_limits":{"summary":"Build plan: up to 100 concurrent users and agents","source_url":"https://livekit.com/pricing","checked_at":"2026-09-24"},"operations":["voice-agent","phone-calls"],"no_auth":false,"call":{"operation":"dispatch a voice agent into a room","method":"POST","url":"https://{projectDomain}/twirp/livekit.AgentDispatchService/CreateDispatch","example":"curl -X POST https://$LIVEKIT_PROJECT_DOMAIN/twirp/livekit.AgentDispatchService/CreateDispatch -H \"Authorization: Bearer $LIVEKIT_ADMIN_JWT\" -H 'Content-Type: application/json' -d '{\"agent_name\": \"my-agent\", \"room\": \"my-room\"}'","response_fields":["id","agent_name","room","state"],"async":null,"source_url":"https://docs.livekit.io/reference/agents/agent-dispatch-service-api.md","checked_at":"2026-09-24"},"unit_price":{"summary":"Agent sessions: $0.01 per minute overage on paid plans (Build includes 1,000 min/mo free); WebRTC overage $0.0004-$0.0005 per participant minute","source_url":"https://livekit.com/pricing","checked_at":"2026-09-24"},"has_free_tier":true,"has_trial":false,"no_card":true,"stale":false,"link_check":{"checked_at":"2026-09-24","docs":"ok","llms_txt":"ok"}},
{"id":"retell-ai","name":"Retell AI","homepage":"https://www.retellai.com","docs":"https://docs.retellai.com/api-references/overview","auth":"api_key","auth_hint":"Authorization: Bearer <api_key>","mcp":{"type":"official","url":"https://mcp.retellai.com","maintainer":"vendor","remote_url":"https://mcp.retellai.com","source_url":"https://docs.retellai.com/get-started/mcp-server","checked_at":"2026-09-24","domain_verified":true,"kind":"vendor-hosted","config":{"transport":"streamable-http","url":"https://mcp.retellai.com","headers":{"Authorization":"Bearer $RETELL_API_KEY"},"oauth":false,"docs_only":false,"source_url":"https://docs.retellai.com/get-started/mcp-server","checked_at":"2026-09-24"}},"free_tier":"$10 free credit on signup, then pay-as-you-go ($0.07-$0.31/min for voice)","sdk":["python","typescript"],"openapi":null,"llms_txt":"https://docs.retellai.com/llms.txt","desc_en":"Build, deploy, and manage AI voice agents that handle phone and web calls via REST API and SDKs.","notes":"Official MCP at https://mcp.retellai.com (Streamable HTTP) authenticates with Authorization: Bearer <RETELL_API_KEY>.","verified":"2026-09-24","operations":["voice-agent","phone-calls"],"free_plan":{"kind":"trial","quota":"$10 in free credits","period":"one_time","source_url":"https://www.retellai.com/pricing","checked_at":"2026-09-24"},"auth_scheme":{"type":"http","scheme":"bearer","format":"Authorization: Bearer <RETELL_API_KEY>","source_url":"https://docs.retellai.com/api-references/overview","checked_at":"2026-09-24"},"base_url":"https://api.retellai.com","rate_limits":{"summary":"Pay-As-You-Go workspaces: 20 concurrent calls by default (extra $8/call/month); calls max 1 hour by default","source_url":"https://docs.retellai.com/deploy/concurrency","checked_at":"2026-09-24"},"no_auth":false,"call":{"operation":"place an outbound AI phone call","method":"POST","url":"https://api.retellai.com/v2/create-phone-call","example":"curl -X POST https://api.retellai.com/v2/create-phone-call -H \"Authorization: Bearer $RETELL_API_KEY\" -H \"Content-Type: application/json\" -d '{\"from_number\":\"+14157774444\",\"to_number\":\"+12137774445\"}'","response_fields":["call_id","call_status","agent_id"],"async":"poll GET https://api.retellai.com/v2/get-call/{call_id} (or use webhooks) for transcript and outcome","source_url":"https://docs.retellai.com/api-references/create-phone-call","checked_at":"2026-09-24"},"unit_price":{"summary":"Per call minute: voice infra $0.055 + LLM (e.g. $0.064 GPT 5.6 Terra) + telephony ($0.015 US via Twilio); advertised $0.07-$0.31/min","source_url":"https://www.retellai.com/pricing","checked_at":"2026-09-24"},"has_free_tier":false,"has_trial":true,"no_card":false,"stale":false,"link_check":{"checked_at":"2026-09-24","docs":"ok","mcp":"reachable","llms_txt":"ok"},"ratings":[{"source":"sourceforge","rating":1.0,"reviews":1,"url":"https://sourceforge.net/software/product/Retell-AI/","fetched_at":"2026-09-24T16:58Z"}],"uptime":{"window_days":30,"api":{"url":"https://api.retellai.com","probes":1,"up":1,"median_ms":278,"last":{"at":"2026-09-24T18:26Z","up":true,"detail":200}},"mcp_remote":{"url":"https://mcp.retellai.com","probes":1,"up":1,"median_ms":406,"last":{"at":"2026-09-24T18:26Z","up":true,"detail":200}}},"reviews_url":"https://raw.githubusercontent.com/eater2/ai_agents_api_library/main/catalog/reviews/retell-ai.json"},
{"id":"synthflow-api","name":"Synthflow API","homepage":"https://synthflow.ai","docs":"https://docs.synthflow.ai/getting-started-with-your-api","auth":"api_key","auth_hint":"Authorization: Bearer <api_key>","mcp":{"type":"official","url":"https://mcp.synthflow.ai/mcp","maintainer":"vendor","remote_url":"https://mcp.synthflow.ai/mcp","tools":["list_agents","get_agent","create_agent","update_agent","publish_agent_draft","delete_agent","list_calls","get_call_details","get_call_analytics","start_test_call","create_action","list_knowledge_bases","create_knowledge_base","execute_simulation_suite","list_phone_numbers","list_contacts","search_docs"],"covers_full_api":true,"source_url":"https://docs.synthflow.ai/mcp-server","checked_at":"2026-09-24","domain_verified":true,"kind":"vendor-hosted","config":{"transport":"streamable-http","url":"https://mcp.synthflow.ai/mcp","derived":true}},"free_tier":"Paid only: pricing page lists Enterprise contracts from $30,000/year; no self-serve free trial shown","sdk":[],"openapi":null,"llms_txt":"https://docs.synthflow.ai/llms-full.txt","desc_en":"Create and manage AI phone voice agents and trigger/manage outbound calls programmatically via REST API.","notes":"Go-to-market is enterprise sales. Official remote MCP (~60 tools) also has regional URLs: https://mcp.us.synthflow.ai/mcp and https://mcp.eu.synthflow.ai/mcp.","verified":"2026-09-24","operations":["voice-agent","phone-calls"],"auth_scheme":{"type":"http","scheme":"bearer","format":"Authorization: Bearer <SYNTHFLOW_API_KEY>","source_url":"https://docs.synthflow.ai/getting-started-with-your-api","checked_at":"2026-09-24"},"base_url":"https://api.synthflow.ai/v2","rate_limits":{"summary":"Per-workspace concurrency limit and CAPS (calls initiated per second) limit; excess returns 429 or is queued","source_url":"https://docs.synthflow.ai/concurrency-calling-limits","checked_at":"2026-09-24"},"no_auth":false,"has_free_tier":false,"has_trial":true,"no_card":false,"stale":false,"link_check":{"checked_at":"2026-09-24","docs":"ok","llms_txt":"ok"},"ratings":[{"source":"sourceforge","rating":1.0,"reviews":1,"url":"https://sourceforge.net/software/product/Synthflow/","fetched_at":"2026-09-24T16:58Z"}],"uptime":{"window_days":30,"api":{"url":"https://api.synthflow.ai/v2","probes":1,"up":1,"median_ms":678,"last":{"at":"2026-09-24T18:26Z","up":true,"detail":404}},"mcp_remote":{"url":"https://mcp.synthflow.ai/mcp","probes":1,"up":1,"median_ms":427,"last":{"at":"2026-09-24T18:26Z","up":true,"detail":401}}},"reviews_url":"https://raw.githubusercontent.com/eater2/ai_agents_api_library/main/catalog/reviews/synthflow-api.json"},
{"id":"twilio-programmable-voice","name":"Twilio Programmable Voice","homepage":"https://www.twilio.com/en-us/voice","docs":"https://www.twilio.com/docs/voice","auth":"api_key","auth_hint":"Basic Auth (Account SID + Auth Token) or API Key/Secret","mcp":{"type":"official","url":"https://github.com/twilio-labs/mcp","maintainer":"vendor","repo":"https://github.com/twilio-labs/mcp","covers_full_api":true,"source_url":"https://github.com/twilio-labs/mcp","checked_at":"2026-09-24","domain_verified":null,"kind":"official","config":{"transport":"stdio","command":"npx","args":["-y","@twilio-alpha/mcp","$TWILIO_ACCOUNT_SID/$TWILIO_API_KEY:$TWILIO_API_SECRET"],"env":[],"docs_only":false,"source_url":"https://github.com/twilio-labs/mcp#quick-start","checked_at":"2026-09-24"}},"free_tier":"Trial: one-time free units (e.g. 75 voice minutes, 100 SMS, 100 WhatsApp, 3,000 emails), no card, expires after 30 days; then pay-as-you-go","sdk":["python","javascript","java","csharp","php","ruby"],"openapi":"https://github.com/twilio/twilio-oai","llms_txt":null,"desc_en":"Programmatically make, receive, and control phone calls (IVR, recording, conferencing) via REST API.","notes":"Widely used as the underlying telephony carrier beneath voice-agent platforms (Vapi, Retell, ElevenLabs, LiveKit) for actual call carriage. Twilio's own MCP (npm @twilio-alpha/mcp) is alpha.","verified":"2026-09-24","operations":["phone-calls"],"free_plan":{"kind":"trial","requires_card":false,"quota":"75 voice minutes, 100 SMS, 100 WhatsApp messages, 3,000 emails; verified numbers only","period":"one_time","source_url":"https://www.twilio.com/docs/usage/tutorials/how-to-use-your-free-trial-account","checked_at":"2026-09-24"},"auth_scheme":{"type":"http","scheme":"basic","format":"Authorization: Basic base64(<API_KEY_SID>:<API_KEY_SECRET>) (or AccountSid:AuthToken)","source_url":"https://www.twilio.com/docs/usage/requests-to-twilio","checked_at":"2026-09-24"},"base_url":"https://api.twilio.com/2010-04-01","rate_limits":{"summary":"Account API concurrency limit; exceeding returns 429 Too Many Requests","source_url":"https://www.twilio.com/docs/usage/twilios-response","checked_at":"2026-09-24"},"no_auth":false,"call":{"operation":"make an outbound call","method":"POST","url":"https://api.twilio.com/2010-04-01/Accounts/{AccountSid}/Calls.json","example":"curl -X POST \"https://api.twilio.com/2010-04-01/Accounts/$TWILIO_ACCOUNT_SID/Calls.json\" -u \"$TWILIO_ACCOUNT_SID:$TWILIO_AUTH_TOKEN\" --data-urlencode \"To=+15558675310\" --data-urlencode \"From=$TWILIO_NUMBER\" --data-urlencode \"Twiml=<Response><Say>Hello</Say></Response>\"","response_fields":["sid","status","duration","price"],"async":"poll GET .../Calls/{sid}.json for status, or set StatusCallback","source_url":"https://www.twilio.com/docs/voice/api/call-resource","checked_at":"2026-09-24"},"unit_price":{"summary":"US: outbound calls $0.0140/min; inbound $0.0085/min on local numbers (+$1.15/mo per number)","source_url":"https://www.twilio.com/en-us/voice/pricing/us","checked_at":"2026-09-24"},"has_free_tier":false,"has_trial":true,"no_card":true,"stale":false,"link_check":{"checked_at":"2026-09-24","docs":"ok","mcp":"ok","openapi":"ok"},"ratings":[{"source":"github","repo":"twilio/twilio-oai","stars":169,"forks":106,"pushed_at":"2026-09-09","archived":false,"url":"https://github.com/twilio/twilio-oai","fetched_at":"2026-09-24T16:54Z"},{"source":"github","repo":"twilio-labs/mcp","stars":111,"forks":41,"pushed_at":"2026-02-14","archived":false,"url":"https://github.com/twilio-labs/mcp","fetched_at":"2026-09-24T16:54Z"}],"uptime":{"window_days":30,"api":{"url":"https://api.twilio.com/2010-04-01","probes":1,"up":1,"median_ms":152,"last":{"at":"2026-09-24T18:26Z","up":true,"detail":200}}}},
{"id":"vapi","name":"Vapi","homepage":"https://vapi.ai","docs":"https://docs.vapi.ai/api-reference","auth":"api_key","auth_hint":"Authorization: Bearer <api_key>","mcp":{"type":"official","url":"https://mcp.vapi.ai/mcp","maintainer":"vendor","remote_url":"https://mcp.vapi.ai/mcp","repo":"https://github.com/VapiAI/mcp-server","tools":["list_assistants","create_assistant","get_assistant","list_calls","create_call","get_call","list_phone_numbers","get_phone_number","list_tools","get_tool"],"covers_full_api":false,"source_url":"https://docs.vapi.ai/sdk/mcp-server","checked_at":"2026-09-24","domain_verified":true,"kind":"vendor-hosted","config":{"transport":"streamable-http","url":"https://mcp.vapi.ai/mcp","headers":{"Authorization":"Bearer $VAPI_API_KEY"},"oauth":false,"env":["VAPI_API_KEY"],"docs_only":false,"source_url":"https://docs.vapi.ai/sdk/mcp-server","checked_at":"2026-09-24"}},"free_tier":"$5 free credit on signup, then pay-as-you-go (~$0.05/min platform fee + provider costs)","sdk":["python","typescript"],"openapi":"https://api.vapi.ai/api","llms_txt":"https://docs.vapi.ai/llms.txt","desc_en":"Create, configure, and run AI voice assistants that make and receive phone calls via REST API.","notes":"Also has an official MCP server (streamable-HTTP and SSE endpoints) exposing assistants/calls/phone numbers as tools.","verified":"2026-09-24","operations":["voice-agent","phone-calls"],"free_plan":{"kind":"trial","quota":"$5 free credits","period":"one_time","source_url":"https://vapi.ai/pricing","checked_at":"2026-09-24"},"auth_scheme":{"type":"http","scheme":"bearer","format":"Authorization: Bearer <VAPI_PRIVATE_API_KEY>","source_url":"https://docs.vapi.ai/api-reference","checked_at":"2026-09-24"},"base_url":"https://api.vapi.ai","rate_limits":{"summary":"4 concurrent calls with no Success Package; 10 on Core ($29/mo), 30 on Pro","source_url":"https://vapi.ai/pricing","checked_at":"2026-09-24"},"no_auth":false,"call":{"operation":"start an outbound phone call with an assistant","method":"POST","url":"https://api.vapi.ai/call","example":"curl -X POST https://api.vapi.ai/call -H \"Authorization: Bearer $VAPI_PRIVATE_API_KEY\" -H \"Content-Type: application/json\" -d '{\"assistantId\": \"your-assistant-id\", \"phoneNumberId\": \"your-phone-number-id\", \"customer\": {\"number\": \"+14155551234\"}}'","response_fields":["id","status"],"async":"call runs asynchronously; GET https://api.vapi.ai/call/{id} for status and results","source_url":"https://docs.vapi.ai/api-reference/calls/create","checked_at":"2026-09-24"},"unit_price":{"summary":"$0.05 per call minute Vapi hosting fee; transcriber, LLM, voice and telephony billed separately at cost","source_url":"https://vapi.ai/pricing","checked_at":"2026-09-24"},"has_free_tier":false,"has_trial":true,"no_card":false,"stale":false,"link_check":{"checked_at":"2026-09-24","docs":"ok","mcp":"reachable","openapi":"ok","llms_txt":"ok"},"uptime":{"window_days":30,"api":{"url":"https://api.vapi.ai","probes":1,"up":1,"median_ms":424,"last":{"at":"2026-09-24T18:26Z","up":true,"detail":200}},"mcp_remote":{"url":"https://mcp.vapi.ai/mcp","probes":1,"up":1,"median_ms":163,"last":{"at":"2026-09-24T18:26Z","up":true,"detail":401}}}}
]}