Vapi

aid: vapi-ai
url: https://raw.githubusercontent.com/api-evangelist/vapi-ai/refs/heads/main/apis.yml
apis:
  - aid: vapi-ai:vapi-assistants-api
    name: Vapi Assistants API
    tags:
      - Assistants
      - Voice AI
      - Agents
    humanURL: https://docs.vapi.ai/api-reference/assistants/list
    properties:
      - url: https://docs.vapi.ai/api-reference/assistants/list
        type: Documentation
      - url: openapi/vapi-assistants-api-openapi.yml
        type: OpenAPI
      - url: json-schema/vapi-assistant-schema.json
        type: JSONSchema
      - url: json-structure/vapi-assistant-structure.json
        type: JSONStructure
      - url: examples/vapi-assistant-example.json
        type: Example
    description: >-
      Create and manage Vapi voice assistants. An assistant bundles a transcriber, LLM, voice (TTS), server URL, tools,
      first message, system prompt, voicemail handling, and call analysis plan into a reusable voice agent configuration
      that can be attached to inbound or outbound phone numbers, web calls, or squads.
  - aid: vapi-ai:vapi-calls-api
    name: Vapi Calls API
    tags:
      - Calls
      - Voice AI
      - Telephony
    humanURL: https://docs.vapi.ai/api-reference/calls/list
    properties:
      - url: https://docs.vapi.ai/api-reference/calls/list
        type: Documentation
      - url: openapi/vapi-calls-api-openapi.yml
        type: OpenAPI
      - url: asyncapi/vapi-asyncapi.yml
        type: AsyncAPI
      - url: json-schema/vapi-call-schema.json
        type: JSONSchema
      - url: json-structure/vapi-call-structure.json
        type: JSONStructure
      - url: examples/vapi-call-example.json
        type: Example
    description: >-
      Create outbound calls, accept inbound calls, list and filter calls, fetch call status and analysis, delete call
      data, and download per-call artifacts including mono and stereo recordings, customer/assistant isolated
      recordings, video recordings, PCAP packet captures, and structured call logs.
  - aid: vapi-ai:vapi-phone-numbers-api
    name: Vapi Phone Numbers API
    tags:
      - Phone Numbers
      - Telephony
      - Voice AI
    humanURL: https://docs.vapi.ai/api-reference/phone-numbers/list
    properties:
      - url: https://docs.vapi.ai/api-reference/phone-numbers/list
        type: Documentation
      - url: openapi/vapi-phone-numbers-api-openapi.yml
        type: OpenAPI
      - url: json-schema/vapi-phone-number-schema.json
        type: JSONSchema
      - url: json-structure/vapi-phone-number-structure.json
        type: JSONStructure
      - url: examples/vapi-phone-number-example.json
        type: Example
    description: >-
      Buy, BYO-import, and manage phone numbers from Vapi (vapi.phoneNumber), Twilio, Telnyx, Vonage, and SIP trunks.
      Attach an assistant or squad to a number for inbound routing and configure outbound caller-id behavior.
  - aid: vapi-ai:vapi-squads-api
    name: Vapi Squads API
    tags:
      - Squads
      - Voice AI
      - Agents
    humanURL: https://docs.vapi.ai/api-reference/squads/list
    properties:
      - url: https://docs.vapi.ai/api-reference/squads/list
        type: Documentation
      - url: openapi/vapi-squads-api-openapi.yml
        type: OpenAPI
    description: >-
      Compose multiple assistants into a Squad — a multi-agent workflow where the active assistant can hand off a live
      call to another assistant in the squad based on tools, intents, or transfer destinations.
  - aid: vapi-ai:vapi-tools-api
    name: Vapi Tools API
    tags:
      - Tools
      - Voice AI
      - Function Calling
    humanURL: https://docs.vapi.ai/api-reference/tools/list
    properties:
      - url: https://docs.vapi.ai/api-reference/tools/list
        type: Documentation
      - url: openapi/vapi-tools-api-openapi.yml
        type: OpenAPI
    description: >-
      Define and manage Tools (function tools, transfer-call tools, end-call tools, DTMF tools, hangup tools, voicemail
      tools, MCP tools, query tools, Make/Zapier tools, knowledge-base tools, and Google/Slack/ GoHighLevel
      integrations) that the assistant LLM can invoke during a call.
  - aid: vapi-ai:vapi-files-api
    name: Vapi Files API
    tags:
      - Files
      - Voice AI
      - Knowledge Base
    humanURL: https://docs.vapi.ai/api-reference/files/list
    properties:
      - url: https://docs.vapi.ai/api-reference/files/list
        type: Documentation
      - url: openapi/vapi-files-api-openapi.yml
        type: OpenAPI
    description: >-
      Upload, list, retrieve, update, and delete files used as inputs to knowledge bases and other assistant-side
      artifacts.
  - aid: vapi-ai:vapi-chats-api
    name: Vapi Chats API
    tags:
      - Chats
      - Voice AI
      - Text
    humanURL: https://docs.vapi.ai/api-reference/chats/list
    properties:
      - url: https://docs.vapi.ai/api-reference/chats/list
        type: Documentation
      - url: openapi/vapi-chats-api-openapi.yml
        type: OpenAPI
    description: >-
      Text-based conversation surface that reuses the same assistant configuration as voice calls, including an
      OpenAI-compatible /chat/responses endpoint for drop-in replacement of OpenAI chat completions.
  - aid: vapi-ai:vapi-sessions-api
    name: Vapi Sessions API
    tags:
      - Sessions
      - Voice AI
      - State
    humanURL: https://docs.vapi.ai/api-reference/sessions/list
    properties:
      - url: https://docs.vapi.ai/api-reference/sessions/list
        type: Documentation
      - url: openapi/vapi-sessions-api-openapi.yml
        type: OpenAPI
    description: >-
      Stateful sessions that persist conversation history across calls and chats so an assistant can pick up where the
      customer left off.
  - aid: vapi-ai:vapi-campaigns-api
    name: Vapi Campaigns API
    tags:
      - Campaigns
      - Voice AI
      - Outbound
    humanURL: https://docs.vapi.ai/api-reference/campaigns/list
    properties:
      - url: https://docs.vapi.ai/api-reference/campaigns/list
        type: Documentation
      - url: openapi/vapi-campaigns-api-openapi.yml
        type: OpenAPI
    description: >-
      Outbound calling campaigns — upload a customer list and schedule batched outbound calls against one or more
      assistants and phone numbers with concurrency and retry policies.
  - aid: vapi-ai:vapi-analytics-api
    name: Vapi Analytics API
    tags:
      - Analytics
      - Voice AI
      - Reporting
    humanURL: https://docs.vapi.ai/api-reference/analytics/create
    properties:
      - url: https://docs.vapi.ai/api-reference/analytics/create
        type: Documentation
      - url: openapi/vapi-analytics-api-openapi.yml
        type: OpenAPI
    description: >-
      Run aggregate analytics queries across calls — group by assistant, time bucket, status, end-reason, success
      evaluation, cost, and duration — for dashboards and chargeback reporting.
  - aid: vapi-ai:vapi-insight-api
    name: Vapi Insight API
    tags:
      - Insight
      - Voice AI
      - Observability
    humanURL: https://docs.vapi.ai/api-reference/insights/list
    properties:
      - url: https://docs.vapi.ai/api-reference/insights/list
        type: Documentation
      - url: openapi/vapi-insight-api-openapi.yml
        type: OpenAPI
    description: >-
      Define and run Insight queries across call data, including preview-before-save and on-demand runs, to extract
      structured signals from conversation transcripts.
  - aid: vapi-ai:vapi-observability-api
    name: Vapi Observability Scorecard API
    tags:
      - Observability
      - Scorecard
      - Voice AI
      - Evaluation
    humanURL: https://docs.vapi.ai/api-reference/scorecards/list
    properties:
      - url: https://docs.vapi.ai/api-reference/scorecards/list
        type: Documentation
      - url: openapi/vapi-observability-api-openapi.yml
        type: OpenAPI
    description: >-
      Define LLM-graded scorecards that automatically evaluate every call against your defined success criteria and
      produce structured scores for trend analysis and regression detection.
  - aid: vapi-ai:vapi-eval-api
    name: Vapi Eval API
    tags:
      - Eval
      - Voice AI
      - Testing
    humanURL: https://docs.vapi.ai/api-reference/evals/list
    properties:
      - url: https://docs.vapi.ai/api-reference/evals/list
        type: Documentation
      - url: openapi/vapi-eval-api-openapi.yml
        type: OpenAPI
    description: >-
      Create test suites that simulate end-user behavior against an assistant, run them on demand, and inspect per-run
      pass/fail and judge output for regression testing of voice agents.
  - aid: vapi-ai:vapi-structured-outputs-api
    name: Vapi Structured Outputs API
    tags:
      - Structured Outputs
      - Voice AI
    humanURL: https://docs.vapi.ai/api-reference/structured-outputs/list
    properties:
      - url: https://docs.vapi.ai/api-reference/structured-outputs/list
        type: Documentation
      - url: openapi/vapi-structured-outputs-api-openapi.yml
        type: OpenAPI
    description: >-
      Define JSON-Schema-driven structured outputs that the assistant must populate from a call, plus an on-demand
      /structured-output/run endpoint to backfill outputs against an existing transcript.
  - aid: vapi-ai:vapi-provider-resources-api
    name: Vapi Provider Resources API
    tags:
      - Provider Resources
      - Voice AI
      - Integrations
    humanURL: https://docs.vapi.ai/api-reference/provider-resources/list
    properties:
      - url: https://docs.vapi.ai/api-reference/provider-resources/list
        type: Documentation
      - url: openapi/vapi-provider-resources-api-openapi.yml
        type: OpenAPI
    description: >-
      Generic CRUD over provider-side resources (e.g. ElevenLabs voices, Cartesia voices, Deepgram custom models) so
      they can be created and managed through Vapi without leaving the platform.
name: Vapi
tags:
  - AI
  - Voice AI
  - Voice Agents
  - Conversational AI
  - Telephony
  - Real-Time
  - Transcription
  - Text-to-Speech
  - LLM
  - Agents
  - MCP
kind: contract
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
access: 3rd-Party
common:
  - type: PostmanWorkspace
    url: https://www.postman.com/kinlaneapi/vapi/overview
  - type: ArazzoWorkflows
    url: arazzo/
    workflows:
      - url: arazzo/vapi-ai-assistant-phone-outbound-call-workflow.yml
        name: Vapi Assistant Outbound Call End to End
        summary: Create an assistant, provision a Vapi phone number, place an outbound call, and poll until it ends.
      - url: arazzo/vapi-ai-build-squad-workflow.yml
        name: Vapi Build a Multi-Assistant Squad
        summary: Create two specialized assistants and assemble them into a squad that can hand calls between them.
      - url: arazzo/vapi-ai-call-then-analytics-workflow.yml
        name: Vapi Outbound Call Then Cost Analytics
        summary: Place an outbound call, poll it to completion, then query call analytics for cost and duration.
      - url: arazzo/vapi-ai-create-assistant-workflow.yml
        name: Vapi Create and Verify Assistant
        summary: Create a voice AI assistant and read it back to confirm it was provisioned.
      - url: arazzo/vapi-ai-create-tool-attach-assistant-workflow.yml
        name: Vapi Create Function Tool and Attach to Assistant
        summary: Create a custom function tool and attach it to a freshly created assistant.
      - url: arazzo/vapi-ai-file-knowledge-base-assistant-workflow.yml
        name: Vapi File-Backed Knowledge Base Assistant
        summary: Upload a file, build a query tool knowledge base from it, and create an assistant that uses it.
      - url: arazzo/vapi-ai-import-twilio-number-workflow.yml
        name: Vapi Import Twilio Number and Bind Assistant
        summary: Create an assistant and import an existing Twilio number that routes inbound calls to it.
      - url: arazzo/vapi-ai-squad-outbound-call-workflow.yml
        name: Vapi Squad Outbound Call
        summary: Build a two-assistant squad, place an outbound call to it, and poll until the call ends.
  - url: https://vapi.ai
    type: Portal
  - url: https://docs.vapi.ai
    name: Vapi Docs
    type: Documentation
  - url: https://api.vapi.ai/api
    name: Swagger UI
    type: Documentation
  - url: https://api.vapi.ai/api-json
    name: Raw OpenAPI JSON
    type: OpenAPI
  - url: https://docs.vapi.ai/quickstart
    name: Quickstart
    type: GettingStarted
  - url: https://dashboard.vapi.ai
    name: Vapi Dashboard
    type: SignUp
  - url: https://status.vapi.ai
    name: Vapi Status
    type: StatusPage
  - url: https://vapi.ai/pricing
    name: Vapi Pricing
    type: Pricing
  - url: https://discord.gg/pUFNcf2WmH
    name: Vapi Discord
    type: Forum
  - url: https://vapi.ai/blog
    name: Vapi Blog
    type: Blog
  - url: https://vapi.ai/changelog
    name: Vapi Changelog
    type: ChangeLog
  - url: https://github.com/VapiAI
    name: Vapi GitHub
    type: GitHubOrganization
  - url: https://github.com/VapiAI/server-sdk-typescript
    name: TypeScript Server SDK
    type: SDK
  - url: https://github.com/VapiAI/server-sdk-python
    name: Python Server SDK
    type: SDK
  - url: https://github.com/VapiAI/server-sdk-csharp
    name: C# Server SDK
    type: SDK
  - url: https://github.com/VapiAI/server-sdk-ruby
    name: Ruby Server SDK
    type: SDK
  - url: https://github.com/VapiAI/server-sdk-php
    name: PHP Server SDK
    type: SDK
  - url: https://github.com/VapiAI/client-sdk-web
    name: Web Client SDK
    type: SDK
  - url: https://github.com/VapiAI/client-sdk-python
    name: Python Client SDK
    type: SDK
  - url: https://github.com/VapiAI/client-sdk-react-native
    name: React Native Client SDK
    type: SDK
  - url: https://github.com/VapiAI/client-sdk-ios
    name: iOS Client SDK
    type: SDK
  - url: https://github.com/VapiAI/client-sdk-html-script-tag
    name: HTML Script Tag Client SDK
    type: SDK
  - url: https://github.com/VapiAI/mcp-server
    name: Vapi MCP Server
    type: Tool
  - url: https://github.com/VapiAI/skills
    name: Vapi Agent Skills
    type: Tool
  - url: https://github.com/VapiAI/gitops
    name: Vapi GitOps
    type: Tool
  - url: https://github.com/VapiAI/docs
    name: Vapi Docs Repo
    type: CodeExamples
  - url: https://docs.vapi.ai/server-url
    name: Server URL (Webhooks)
    type: Webhooks
  - url: https://docs.vapi.ai/server-url/events
    name: Server Events
    type: Webhooks
  - url: asyncapi/vapi-asyncapi.yml
    name: Vapi Realtime AsyncAPI (WebSocket Transport + Server URL Events)
    type: AsyncAPI
  - url: https://trust.vapi.ai
    name: Vapi Trust Center
    type: TrustCenter
  - url: https://vapi.ai/privacy
    type: PrivacyPolicy
  - url: https://vapi.ai/terms-of-service
    type: TermsOfService
  - url: https://vapi.ai/aup
    type: TermsOfService
  - url: https://x.com/Vapi_AI
    type: Twitter
  - url: https://www.linkedin.com/company/vapi-ai
    type: LinkedIn
  - url: https://www.ycombinator.com/companies/vapi
    name: Y Combinator Profile
    type: Documentation
  - url: plans/vapi-ai-plans-pricing.yml
    type: Plans
  - url: rate-limits/vapi-ai-rate-limits.yml
    type: RateLimits
  - url: finops/vapi-ai-finops.yml
    type: FinOps
  - type: Features
    data:
      - Sub-700ms voice-to-voice latency orchestration layer
      - Transcriber + LLM + voice (TTS) modular pipeline with multi-provider choice
      - Bring your own provider keys to pay providers at cost
      - Assistants, Squads (multi-agent handoff), Sessions (persistent state)
      - Inbound and outbound calling over Twilio, Telnyx, Vonage, vapi.phoneNumber, and SIP
      - Campaigns for batched outbound calling with concurrency/retry
      - Tools (function, transfer-call, end-call, DTMF, hangup, voicemail, MCP, query, Make, Zapier, GHL, KB)
      - Server URL webhooks for real-time call events and function execution
      - Per-call mono/stereo/customer/assistant/video recordings, PCAP packet captures, call logs
      - Analytics, Insights, Observability Scorecards, and Evals for production monitoring and regression testing
      - Structured Outputs for JSON-schema-constrained extraction from calls
      - Chats API (text channel) and OpenAI-compatible /chat/responses
      - Official SDKs - server (TS, Python, C#, Ruby, PHP) and client (Web, Python, React Native, iOS, HTML)
      - Vapi MCP Server for Model Context Protocol integration
      - HIPAA and Zero Data Retention add-ons; SOC2 and PCI on Scale plan
      - $0.05/min Vapi orchestration fee on Build plan; model and voice costs passed at cost
    sources:
      - https://vapi.ai/pricing
      - https://docs.vapi.ai
      - https://api.vapi.ai/api
      - https://github.com/VapiAI
      - https://status.vapi.ai
    updated: '2026-05-24'
created: '2026-05-24T00:00:00.000Z'
modified: '2026-05-29'
position: Consuming
description: >-
  Vapi is a San Francisco-based voice AI platform that lets developers build real-time, low-latency voice agents over
  phone, web, and SIP. It orchestrates three modular components — a transcriber (STT), an LLM, and a voice (TTS) — into
  a sub-700ms voice-to-voice pipeline, with first-class support for tools/function calling, multi-agent squads, outbound
  campaigns, persistent sessions, structured outputs, recording artifacts, evaluation scorecards, and a full REST API
  plus official SDKs in TypeScript, Python, C#, Ruby, PHP, and client SDKs for Web, React Native, iOS, and Python. Vapi
  is a Y Combinator company.
maintainers:
  - FN: Kin Lane
    email: info@apievangelist.com
    X: apievangelist
    url: https://apievangelist.com
specificationVersion: '0.16'