Phonic

Phonic is a San Francisco voice AI company (founded 2024, seed-backed by Lux Capital) building the first end-to-end speech-to-speech platform for reliable conversational voice agents. The Phonic API lets developers create and configure voice agents, attach voices, place and receive inbound/outbound phone calls (including via SIP trunking and Amazon Connect), run real-time speech-to-speech conversations over a WebSocket, wire up webhook/WebSocket/context/transfer/MCP tools, and analyze, evaluate, and extract structured data from conversations. It ships an OpenAPI 3.1 REST spec, an AsyncAPI 2.6.0 WebSocket spec, official Node and Python SDKs, a hosted MCP server, and llms.txt docs for AI clients.

Phonic publishes 10 APIs on the APIs.io network, including agents API, apiKeys API, auth API, and 7 more. Tagged areas include Company, Artificial Intelligence, Voice AI, Conversational AI, and Speech.

The Phonic catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Phonic’s developer surface includes authentication, engineering blog, pricing, and 20 more developer resources.

🌐 Visit website 📡 Source on GitHub
48.9/100 developing ▬ flat Agent 78/100 agent native Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessSelf serve
10 APIs 1 MCP Servers
CompanyArtificial IntelligenceVoice AIConversational AISpeechVoice AgentsTelephonySpeech To Speech

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 48.9/100 · developing
Contract Quality 16.1 / 25
Developer Ergonomics 8.7 / 20
Commercial Clarity 6.3 / 20
Operational Transparency 7.9 / 13
Governance 0.0 / 12
Discoverability 10.0 / 10
Agent readiness — 78/100 · agent native
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 6 / 6
Agent Skills 5 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/phonic: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 10

Individual APIs this provider publishes, each with its own machine-readable definition.

Phonic agents API

The agents API from Phonic — 5 operation(s) for agents.

Phonic apiKeys API

The apiKeys API from Phonic — 3 operation(s) for apikeys.

Phonic auth API

The auth API from Phonic — 2 operation(s) for auth.

Phonic conversationItems API

The conversationItems API from Phonic — 1 operation(s) for conversationitems.

Phonic conversations API

The conversations API from Phonic — 9 operation(s) for conversations.

Phonic extractionSchemas API

The extractionSchemas API from Phonic — 2 operation(s) for extractionschemas.

Phonic projects API

The projects API from Phonic — 4 operation(s) for projects.

Phonic tools API

The tools API from Phonic — 2 operation(s) for tools.

Phonic voices API

The voices API from Phonic — 2 operation(s) for voices.

Phonic workspace API

The workspace API from Phonic — 1 operation(s) for workspace.

Scroll for all 10

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

phonic-mcp.yml

MCP SERVER

Rate Limits 1

Documented rate limits and quota policies.

Phonic Rate Limits

3 limits

RATE LIMITS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

API Reference

ASYNCAPI

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Phonic Authentication

http · 1 scheme

SECURITY

Phonic Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Phonic Agentic Access

50 operations · 32 acting

50 operations · 32 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 MCPServer
MCPServer
 LLMsTxt
LLMsTxt
 AgentSkill
AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conformance
Conformance
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Conventions
Conventions
 DataModel
DataModel
 Webhooks
Webhooks

Build 3

SDKs, sample code, and the tooling you integrate with

Packages
Packages
 SDKs
SDKs
 GitHubOrganization
GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 2

Status, limits, changes, and where to get help

StatusPage
StatusPage
 RateLimits
RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Blog
Blog
 Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: phonic
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/phonic.png
name: Phonic
description: Phonic is a San Francisco voice AI company (founded 2024, seed-backed by Lux Capital) building the first end-to-end
  speech-to-speech platform for reliable conversational voice agents. The Phonic API lets developers create and configure
  voice agents, attach voices, place and receive inbound/outbound phone calls (including via SIP trunking and Amazon Connect),
  run real-time speech-to-speech conversations over a WebSocket, wire up webhook/WebSocket/context/transfer/MCP tools, and
  analyze, evaluate, and extract structured data from conversations. It ships an OpenAPI 3.1 REST spec, an AsyncAPI 2.6.0
  WebSocket spec, official Node and Python SDKs, a hosted MCP server, and llms.txt docs for AI clients.
url: https://raw.githubusercontent.com/api-evangelist/phonic/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- lux-capital
x-tier: profiled
x-tier-reason: enriched
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Artificial Intelligence
- Voice AI
- Conversational AI
- Speech
- Voice Agents
- Telephony
- Speech To Speech
apis:
- aid: phonic:phonic-agents-api
  name: Phonic agents API
  description: The agents API from Phonic — 5 operation(s) for agents.
  humanURL: https://docs.phonic.co/
  baseURL: https://api.phonic.ai/v1
  tags:
  - agents
  properties:
  - type: OpenAPI
    url: openapi/phonic-agents-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/phonic-sts-asyncapi-original.yaml
  - type: Documentation
    url: https://docs.phonic.co/
  - type: APIReference
    url: https://docs.phonic.co/api-reference
  - type: GettingStarted
    url: https://docs.phonic.co/docs/get-started/quick-start
- aid: phonic:phonic-apikeys-api
  name: Phonic apiKeys API
  description: The apiKeys API from Phonic — 3 operation(s) for apikeys.
  humanURL: https://docs.phonic.co/
  baseURL: https://api.phonic.ai/v1
  tags:
  - apiKeys
  properties:
  - type: OpenAPI
    url: openapi/phonic-apikeys-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/phonic-sts-asyncapi-original.yaml
  - type: Documentation
    url: https://docs.phonic.co/
  - type: APIReference
    url: https://docs.phonic.co/api-reference
  - type: GettingStarted
    url: https://docs.phonic.co/docs/get-started/quick-start
- aid: phonic:phonic-auth-api
  name: Phonic auth API
  description: The auth API from Phonic — 2 operation(s) for auth.
  humanURL: https://docs.phonic.co/
  baseURL: https://api.phonic.ai/v1
  tags:
  - auth
  properties:
  - type: OpenAPI
    url: openapi/phonic-auth-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/phonic-sts-asyncapi-original.yaml
  - type: Documentation
    url: https://docs.phonic.co/
  - type: APIReference
    url: https://docs.phonic.co/api-reference
  - type: GettingStarted
    url: https://docs.phonic.co/docs/get-started/quick-start
- aid: phonic:phonic-conversationitems-api
  name: Phonic conversationItems API
  description: The conversationItems API from Phonic — 1 operation(s) for conversationitems.
  humanURL: https://docs.phonic.co/
  baseURL: https://api.phonic.ai/v1
  tags:
  - conversationItems
  properties:
  - type: OpenAPI
    url: openapi/phonic-conversationitems-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/phonic-sts-asyncapi-original.yaml
  - type: Documentation
    url: https://docs.phonic.co/
  - type: APIReference
    url: https://docs.phonic.co/api-reference
  - type: GettingStarted
    url: https://docs.phonic.co/docs/get-started/quick-start
- aid: phonic:phonic-conversations-api
  name: Phonic conversations API
  description: The conversations API from Phonic — 9 operation(s) for conversations.
  humanURL: https://docs.phonic.co/
  baseURL: https://api.phonic.ai/v1
  tags:
  - conversations
  properties:
  - type: OpenAPI
    url: openapi/phonic-conversations-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/phonic-sts-asyncapi-original.yaml
  - type: Documentation
    url: https://docs.phonic.co/
  - type: APIReference
    url: https://docs.phonic.co/api-reference
  - type: GettingStarted
    url: https://docs.phonic.co/docs/get-started/quick-start
- aid: phonic:phonic-extractionschemas-api
  name: Phonic extractionSchemas API
  description: The extractionSchemas API from Phonic — 2 operation(s) for extractionschemas.
  humanURL: https://docs.phonic.co/
  baseURL: https://api.phonic.ai/v1
  tags:
  - extractionSchemas
  properties:
  - type: OpenAPI
    url: openapi/phonic-extractionschemas-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/phonic-sts-asyncapi-original.yaml
  - type: Documentation
    url: https://docs.phonic.co/
  - type: APIReference
    url: https://docs.phonic.co/api-reference
  - type: GettingStarted
    url: https://docs.phonic.co/docs/get-started/quick-start
- aid: phonic:phonic-projects-api
  name: Phonic projects API
  description: The projects API from Phonic — 4 operation(s) for projects.
  humanURL: https://docs.phonic.co/
  baseURL: https://api.phonic.ai/v1
  tags:
  - projects
  properties:
  - type: OpenAPI
    url: openapi/phonic-projects-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/phonic-sts-asyncapi-original.yaml
  - type: Documentation
    url: https://docs.phonic.co/
  - type: APIReference
    url: https://docs.phonic.co/api-reference
  - type: GettingStarted
    url: https://docs.phonic.co/docs/get-started/quick-start
- aid: phonic:phonic-tools-api
  name: Phonic tools API
  description: The tools API from Phonic — 2 operation(s) for tools.
  humanURL: https://docs.phonic.co/
  baseURL: https://api.phonic.ai/v1
  tags:
  - tools
  properties:
  - type: OpenAPI
    url: openapi/phonic-tools-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/phonic-sts-asyncapi-original.yaml
  - type: Documentation
    url: https://docs.phonic.co/
  - type: APIReference
    url: https://docs.phonic.co/api-reference
  - type: GettingStarted
    url: https://docs.phonic.co/docs/get-started/quick-start
- aid: phonic:phonic-voices-api
  name: Phonic voices API
  description: The voices API from Phonic — 2 operation(s) for voices.
  humanURL: https://docs.phonic.co/
  baseURL: https://api.phonic.ai/v1
  tags:
  - voices
  properties:
  - type: OpenAPI
    url: openapi/phonic-voices-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/phonic-sts-asyncapi-original.yaml
  - type: Documentation
    url: https://docs.phonic.co/
  - type: APIReference
    url: https://docs.phonic.co/api-reference
  - type: GettingStarted
    url: https://docs.phonic.co/docs/get-started/quick-start
- aid: phonic:phonic-workspace-api
  name: Phonic workspace API
  description: The workspace API from Phonic — 1 operation(s) for workspace.
  humanURL: https://docs.phonic.co/
  baseURL: https://api.phonic.ai/v1
  tags:
  - workspace
  properties:
  - type: OpenAPI
    url: openapi/phonic-workspace-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/phonic-sts-asyncapi-original.yaml
  - type: Documentation
    url: https://docs.phonic.co/
  - type: APIReference
    url: https://docs.phonic.co/api-reference
  - type: GettingStarted
    url: https://docs.phonic.co/docs/get-started/quick-start
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/phonic-agentic-access.yml
- type: DomainSecurity
  url: security/phonic-domain-security.yml
- type: Authentication
  url: authentication/phonic-authentication.yml
- type: Packages
  url: packages/phonic-packages.yml
- type: SDKs
  url: packages/phonic-packages.yml
- type: MCPServer
  url: mcp/phonic-mcp.yml
- type: LLMsTxt
  url: llms/phonic-llms.txt
- type: Conformance
  url: conformance/phonic-conformance.yml
- type: ErrorCatalog
  url: errors/phonic-problem-types.yml
- type: Lifecycle
  url: lifecycle/phonic-lifecycle.yml
- type: StatusPage
  url: https://status.phonic.ai/
- type: Conventions
  url: conventions/phonic-conventions.yml
- type: RateLimits
  url: rate-limits/phonic-rate-limits.yml
- type: DataModel
  url: data-model/phonic-data-model.yml
- type: Webhooks
  url: https://docs.phonic.co/webhooks/overview
- type: AgentSkill
  url: skills/_index.yml
- type: DeveloperPortal
  url: https://docs.phonic.co/
- type: Blog
  url: https://phonic.co/blog
- type: GitHubOrganization
  url: https://github.com/Phonic-Co
- type: Pricing
  url: https://phonic.co/pricing
- type: TermsOfService
  url: https://phonic.co/terms-of-service
- type: PrivacyPolicy
  url: https://phonic.co/privacy-policy
- type: Website
  url: https://phonic.ai/
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 16
  pass: local-v1