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.
Kin Score
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.
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 COLLECTIONAPI Reference agents apiKeys API
OPEN COLLECTIONAPI Reference agents auth API
OPEN COLLECTIONAPI Reference agents conversationItems API
OPEN COLLECTIONAPI Reference agents conversations API
OPEN COLLECTIONAPI Reference agents extractionSchemas API
OPEN COLLECTIONAPI Reference agents projects API
OPEN COLLECTIONAPI Reference agents tools API
OPEN COLLECTIONAPI Reference agents voices API
OPEN COLLECTIONAPI Reference agents workspace API
OPEN COLLECTIONScroll 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 SERVERAgent 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.
| Plan | Price |
|---|---|
| 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
- : second
- : second
- : second
Billed by: subscription · FinOps profile →
Pricing Plans 2
Published pricing tiers and plan structures.
Phonic Plans Pricing
PLANSRate Limits 1
Documented rate limits and quota policies.
Phonic Rate Limits
RATE LIMITSService Levels 1
Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.
Phonic
SLAFinOps 1
Cost, billing, and metering signals for API financial operations.
Phonic Finops
FINOPSEvent Specifications 1
AsyncAPI definitions for this provider's event-driven and streaming APIs.
API Reference
ASYNCAPISpectral Rules 1
Spectral governance rulesets for linting and validating these APIs.
Phonic API Rules
SPECTRALOpenAPI 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
DERIVEDSecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
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)
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.
Work with this as data
Every provider here is available over the APIs.io API and to AI agents over MCP.