Sema4 Ai

Sema4.ai REST API

The v2 REST API drives the Sema4.ai platform programmatically — list and talk to agents, stream responses, queue and manage Work Items, read data connections, manage MCP servers, and read audits. Each deployment serves its own OpenAPI spec at GET /api/v2. Authenticated with a bearer API key.

GitHub

Documentation

📖
APIReference
https://sema4.ai/docs/v2/api
📖
Authentication
https://raw.githubusercontent.com/api-evangelist/sema4-ai/refs/heads/main/authentication/sema4-ai-authentication.yml

Other Resources

🔗
Conventions
https://raw.githubusercontent.com/api-evangelist/sema4-ai/refs/heads/main/conventions/sema4-ai-conventions.yml
🔗
ErrorCatalog
https://raw.githubusercontent.com/api-evangelist/sema4-ai/refs/heads/main/errors/sema4-ai-problem-types.yml
🔗
DataModel
https://raw.githubusercontent.com/api-evangelist/sema4-ai/refs/heads/main/data-model/sema4-ai-data-model.yml
🔗
APIsJSON
https://raw.githubusercontent.com/api-evangelist/sema4-ai/refs/heads/main/apis.yml

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/sema4ai-rest-api"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

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API entry from apis.yml

apis.yml Raw ↑ 
name: Sema4.ai REST API
description: The v2 REST API drives the Sema4.ai platform programmatically — list and talk to agents,
  stream responses, queue and manage Work Items, read data connections, manage MCP servers, and read audits.
  Each deployment serves its own OpenAPI spec at GET /api/v2. Authenticated with a bearer API key.
humanURL: https://sema4.ai/docs/v2/api
baseURL: https://sema4.ai
properties:
- type: APIReference
  url: https://sema4.ai/docs/v2/api
- type: Authentication
  url: authentication/sema4-ai-authentication.yml
- type: Conventions
  url: conventions/sema4-ai-conventions.yml
- type: ErrorCatalog
  url: errors/sema4-ai-problem-types.yml
- type: DataModel
  url: data-model/sema4-ai-data-model.yml