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 21 more developer resources.

🌐 Visit website 📡 Source on GitHub

52.1/100 developing ▬ flat Agent 41/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs 1 MCP Servers

Company Artificial Intelligence Voice AI Conversational AI Speech Voice Agents Telephony Speech to Speech

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 52.1/100 · developing

Contract Quality 14.6 / 23

Developer Ergonomics 11.0 / 18

Access Clarity 5.7 / 18

Operational Transparency 5.9 / 12

Contract Governance 0.5 / 11

Discoverability 6.8 / 9

Create-or-Update Ergonomics 3.3 / 10

Agent readiness — 41/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

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

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. 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. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

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

Open Collections 11

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

API Reference agents API

OPEN COLLECTION

API Reference agents apiKeys API

OPEN COLLECTION

API Reference agents auth API

OPEN COLLECTION

API Reference agents conversationItems API

OPEN COLLECTION

API Reference agents conversations API

OPEN COLLECTION

API Reference agents extractionSchemas API

OPEN COLLECTION

API Reference agents projects API

OPEN COLLECTION

API Reference agents tools API

OPEN COLLECTION

API Reference agents voices API

OPEN COLLECTION

API Reference agents workspace API

OPEN COLLECTION

Scroll for all 11

MCP Servers 1

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

Phonic MCP Server

Phonic's inbound MCP server exposes the Phonic API as MCP tools so a client such as Claude Code, Codex, or Cursor can manage agents, conversations, voices, and projects. It stay...

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

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

MCPServer

LLMsTxt

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conformance

ErrorCatalog

Lifecycle

Conventions

DataModel

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

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: phonic
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - rate-limits
  - security
  generated: '2026-09-03'
  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: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Artificial Intelligence
- Voice AI
- Conversational AI
- Speech
- Voice Agents
- Telephony
- Speech to Speech
tags_raw:
- 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
  tags_raw:
  - 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
  tags_raw:
  - 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:
  - Authentication
  tags_raw:
  - 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: []
  tags_raw:
  - 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
  tags_raw:
  - 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: []
  tags_raw:
  - 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:
  - Project
  tags_raw:
  - 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
  tags_raw:
  - 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
  tags_raw:
  - 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
  tags_raw:
  - 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: Overlay
  url: overlays/phonic-openapi-overlay.yaml
- 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

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