Phonic website screenshot

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 API contracts indexed on the APIs.io network, including Agents API, Auth API, Conversation Items 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 and 1 Spectral governance ruleset.

Phonic’s developer surface includes authentication, engineering blog, pricing, and 22 more developer resources.

60.9/100 strong ▬ flat Agent 58/100 agent ready Front door AI 4/6 moderate Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →
AccessFreemiumSelf serve⚡ Free to try
1 published contract 1 MCP Servers 2 Agent Skills
CompanyArtificial IntelligenceVoice AIConversational AISpeechVoice AgentsTelephonySpeech to SpeechReal-Time

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0
Regulatory Posture applies to this provider. Its tags matched the AI & Biometrics regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
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.
The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
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Agent readiness — checks not met, largest first (exact, from this profile):
  • Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
  • A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
  • Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
  • Agentic Commerce Well-Known Document +5 pts — a parsing /.well-known/ucp.json or acp.json declaring a version and at least one service, OR (0.27) a live x402 payment challenge from _data/x402-adoption.json — `self` when its endpoints are on the provider's own domain, `platform` when they are on a vendor's
  • Well-Known Catalog +4 pts — common[].type includes WellKnown, APICatalog, or api-catalog
  • Consent & Bot Identity +3 pts — common[].type includes AIPREF, ContentSignal, WebBotAuth, or HTTPMessageSignatures
Kin Score — facets with the most composite points still available (weight × headroom):
Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.
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 the provider profile at artifacts.apis.io/phonic/apis.yml: open an issue on github.com/api-evangelist/phonic to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 4

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

measured — observed by APIs.io (verified)
measured — observed by APIs.io (verified)
measured — observed by APIs.io (published)
measured — observed by APIs.io (published)

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 Auth API

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

Phonic Conversation Items 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 Extraction Schemas 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.

Phonic API Keys API

The API Keys API from Phonic — 3 operation(s) for api keys.

Scroll for all 10

Open Collections 10

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

API Reference agents API

OPEN COLLECTION

Scroll for all 10

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

Agent Skills 2

Packaged agent skills for driving this provider's APIs from an AI assistant.

Phonic API pricing

Prices published by Phonic, read 2026-10-07 from phonic.ai/pricing.

PlanPrice
Starter $0/mo
Includes: $30/month in free credits; 3 Workspace seats; Unlimited voices; 10 agents; 10 concurrent calls
Pro $240/mo
Includes: $240/month in free credits; 30 Workspace seats; 50 concurrent calls; 50 agents; Support via private
enterprise Custom Pricing
Includes: Custom seats, agents, concurrency; On-prem / VPC deployment; BAAs for HIPAA; volume discounts

Plan details, limits and sources →

Rate limits

Rate-limit details →

Billed by: subscription · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Phonic Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Phonic Rate Limits

3 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Phonic

SLA

FinOps 1

Cost, billing, and metering signals for API financial operations.

Event Specifications 1

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

API Reference

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Phonic API Rules

55 rules · 48 errors 5 warnings 2 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Phonic Openapi Overlay

2 actions · update · phonic-openapi-original.yaml

DERIVED

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

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Build 3

SDKs, sample code, and the tooling you integrate with

Access & Security 2

Authentication, authorization, and security posture

Operate 2

Status, limits, changes, and where to get help

Commercial 4

Pricing, plans, and the legal terms of use

Company 2

The organization behind the API

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

apis.yml Raw ↑
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: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  generated: '2026-11-06'
  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'
x-docs-platform: fern
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-04
tags:
- Company
- Artificial Intelligence
- Voice AI
- Conversational AI
- Speech
- Voice Agents
- Telephony
- Speech to Speech
- Real-Time
tags_raw:
- Company
- Artificial Intelligence
- Voice AI
- Conversational AI
- Speech
- Voice Agents
- Telephony
- Speech To Speech
- Real-Time
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-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 Conversation Items 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 Extraction Schemas 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:
  - Voice
  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
- aid: phonic:phonic-api-keys-api
  name: Phonic API Keys API
  description: The API Keys API from Phonic — 3 operation(s) for api keys.
  humanURL: https://docs.phonic.co/
  baseURL: https://api.phonic.ai/v1
  tags:
  - APIKeys
  tags_raw:
  - API Keys
  properties:
  - type: OpenAPI
    url: openapi/phonic-api-keys-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: Plans
  url: plans/phonic-plans-pricing.yml
- 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

Phonic API — frequently asked questions

Does Phonic have an API?

Yes. APIs.io lists 10 APIs from Phonic, including Phonic Agents API, Phonic Auth API and Phonic Conversation Items API, and 7 more.

Is there an OpenAPI specification for the Phonic API?

Yes. APIs.io indexes 10 OpenAPI specifications for Phonic, each linked for download from this page.

How do I authenticate with the Phonic API?

Phonic documents its authentication (http · 1 scheme). The details are profiled on APIs.io as Phonic Authentication.

How much does the Phonic API cost?

Phonic publishes its prices; its Starter plan is $0/mo as of 2026-10-07. APIs.io lists 3 pricing plans for Phonic, with each plan's price, limits and inclusions under Pricing on this page.

Does Phonic have an MCP server?

Yes. APIs.io lists 1 MCP server for Phonic: 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 stays up to date with the P

Is the Phonic API ready for AI agents?

Phonic has a Kin Score of 60.9 out of 100 (strong) and an Agent Readiness score of 57.9 (agent-ready), scored by API Evangelist on 2026-11-06.

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