Layercode

Layercode provides voice-AI agent infrastructure - low-latency voice pipelines that turn any LLM or text-based agent into a conversational voice agent for web, mobile, and phone. A REST API manages agents, sessions, and outbound calls, while a realtime WebSocket transport streams audio to the browser and a signed webhook delivers transcripts to your backend, which streams text-to-speech responses back over Server-Sent Events.

Layercode publishes 5 APIs on the APIs.io network, including Realtime Voice API, Webhooks API, Agents API, and 2 more. Tagged areas include Artificial Intelligence, Voice, Voice Agents, Real-Time, and Low Latency.

The Layercode catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

Layercode’s developer surface includes authentication, documentation, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

37.4/100 thin ▬ flat Agent 21/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs

Artificial Intelligence Voice Voice Agents Real-Time Low Latency

Kin Score

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

Composite quality — 37.4/100 · thin

Contract Quality 12.3 / 23

Developer Ergonomics 5.4 / 18

Access Clarity 5.2 / 18

Operational Transparency 4.0 / 12

Contract Governance 1.2 / 11

Discoverability 6.2 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 21/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 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/layercode: 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 5

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

Layercode Realtime Voice API

Bidirectional realtime WebSocket transport that streams base64 PCM microphone audio from the browser to Layercode and streams synthesized speech, transcripts, and structured dat...

Layercode Webhooks API

HMAC-signed webhook Layercode POSTs to your backend with session and transcript events (session.start, message, data, session.update, session.end); your backend streams response...

Layercode Agents API

The Agents API from Layercode — 2 operation(s) for agents.

Layercode Calls API

The Calls API from Layercode — 1 operation(s) for calls.

Layercode Sessions API

The Sessions API from Layercode — 3 operation(s) for sessions.

Open Collections 5

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

API Collection

OPEN COLLECTION

Layercode REST Agents API

OPEN COLLECTION

Layercode REST Agents Calls API

OPEN COLLECTION

Layercode REST Agents Sessions API

OPEN COLLECTION

Layercode REST API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Layercode Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Layercode Rate Limits

3 limits

RATE LIMITS

FinOps 1

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

Layercode Finops

FINOPS

Event Specifications 1

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

Layercode Realtime Voice WebSocket API

AsyncAPI 2.6 description of Layercode's **realtime voice transport**, a genuine bidirectional WebSocket documented at https://docs.layercode.com/api-reference/frontend-ws-api. U...

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Layercode API Rules

5 rules · 1 errors 4 warnings

SPECTRAL

Security Posture 2

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

Layercode Authentication

http · 1 scheme

SECURITY

Layercode Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access 1

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

Layercode Agentic Access

8 operations · 4 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 2

The organization behind the API

LinkedIn

Website

Website

Source (apis.yml)

aid: layercode
url: https://raw.githubusercontent.com/api-evangelist/layercode/refs/heads/main/apis.yml
name: Layercode
kind: company
description: Layercode provides voice-AI agent infrastructure - low-latency voice pipelines that turn any LLM or text-based
  agent into a conversational voice agent for web, mobile, and phone. A REST API manages agents, sessions, and outbound calls,
  while a realtime WebSocket transport streams audio to the browser and a signed webhook delivers transcripts to your backend,
  which streams text-to-speech responses back over Server-Sent Events.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  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:
  - plans
  - authentication
  - security
  - url: https://layercode.com
    status: 301
    note: declared website redirects to https://toyo.ai/ — a different registrable domain (layercode.com -> toyo.ai), possible
      rename or acquisition (probed 2026-09-03, roadmap#169)
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/layercode.png
tags:
- Artificial Intelligence
- Voice
- Voice Agents
- Real-Time
- Low Latency
tags_raw:
- AI
- Voice
- Voice Agents
- Realtime
- Low Latency
created: '2026-06-21'
modified: '2026-06-21'
specificationVersion: '0.23'
apis:
- aid: layercode:layercode-realtime-voice-api
  name: Layercode Realtime Voice API
  tags:
  - Real-Time
  - WebSocket
  - Voice
  - Audio
  tags_raw:
  - Realtime
  - WebSocket
  - Voice
  - Audio
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.layercode.com/api-reference/frontend-ws-api
  baseURL: wss://api.layercode.com/v1/agents/web/websocket
  properties:
  - url: https://docs.layercode.com/api-reference/frontend-ws-api
    type: Documentation
  - url: https://docs.layercode.com/api-reference/frontend-ws-api
    type: APIReference
  - url: asyncapi/layercode-asyncapi.yml
    type: AsyncAPI
  description: Bidirectional realtime WebSocket transport that streams base64 PCM microphone audio from the browser to Layercode
    and streams synthesized speech, transcripts, and structured data back, authorized with a short-lived client_session_key.
- aid: layercode:layercode-webhooks-api
  name: Layercode Webhooks API
  tags:
  - Webhook
  - SSE
  - Event
  tags_raw:
  - Webhooks
  - SSE
  - Events
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.layercode.com/api-reference/webhook-sse-api
  baseURL: https://docs.layercode.com/api-reference/webhook-sse-api
  properties:
  - url: https://docs.layercode.com/api-reference/webhook-sse-api
    type: Documentation
  - url: https://docs.layercode.com/api-reference/webhook-sse-api
    type: APIReference
  - url: asyncapi/layercode-asyncapi.yml
    type: AsyncAPI
  description: HMAC-signed webhook Layercode POSTs to your backend with session and transcript events (session.start, message,
    data, session.update, session.end); your backend streams response.tts / response.data / response.end events back as Server-Sent
    Events that drive the agent's speech.
- aid: layercode:layercode-agents-api
  name: Layercode Agents API
  description: The Agents API from Layercode — 2 operation(s) for agents.
  humanURL: https://docs.layercode.com/api-reference/rest-api
  baseURL: https://api.layercode.com/v1
  tags:
  - Agents
  properties:
  - type: OpenAPI
    url: openapi/layercode-agents-api-openapi.yml
  - type: Documentation
    url: https://docs.layercode.com/api-reference/rest-api
  - type: APIReference
    url: https://docs.layercode.com/api-reference/rest-api
  - type: PostmanCollection
    url: collections/layercode.postman_collection.json
  - type: OpenCollection
    url: collections/layercode.opencollection.json
- aid: layercode:layercode-calls-api
  name: Layercode Calls API
  description: The Calls API from Layercode — 1 operation(s) for calls.
  humanURL: https://docs.layercode.com/api-reference/rest-api
  baseURL: https://api.layercode.com/v1
  tags:
  - Calls
  properties:
  - type: OpenAPI
    url: openapi/layercode-calls-api-openapi.yml
  - type: Documentation
    url: https://docs.layercode.com/api-reference/rest-api
  - type: APIReference
    url: https://docs.layercode.com/api-reference/rest-api
  - type: PostmanCollection
    url: collections/layercode.postman_collection.json
  - type: OpenCollection
    url: collections/layercode.opencollection.json
- aid: layercode:layercode-sessions-api
  name: Layercode Sessions API
  description: The Sessions API from Layercode — 3 operation(s) for sessions.
  humanURL: https://docs.layercode.com/api-reference/rest-api
  baseURL: https://api.layercode.com/v1
  tags:
  - Sessions
  properties:
  - type: OpenAPI
    url: openapi/layercode-sessions-api-openapi.yml
  - type: Documentation
    url: https://docs.layercode.com/api-reference/rest-api
  - type: APIReference
    url: https://docs.layercode.com/api-reference/rest-api
  - type: PostmanCollection
    url: collections/layercode.postman_collection.json
  - type: OpenCollection
    url: collections/layercode.opencollection.json
common:
- type: AgenticAccess
  url: agentic-access/layercode-agentic-access.yml
- type: DomainSecurity
  url: security/layercode-domain-security.yml
- type: Authentication
  url: authentication/layercode-authentication.yml
- type: GitHubOrganization
  url: https://github.com/layercodedev
- type: LinkedIn
  url: https://www.linkedin.com/company/layercode
- type: Website
  url: https://layercode.com
- type: Documentation
  url: https://docs.layercode.com
- type: Plans
  url: plans/layercode-plans-pricing.yml
- type: RateLimits
  url: rate-limits/layercode-rate-limits.yml
- type: FinOps
  url: finops/layercode-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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