Refact Agent Engine API

Local HTTP/LSP API exposed by the Rust `refact-lsp` engine that runs inside the user's IDE or as a standalone server. Implements the agent runtime: provider/model capabilities, chat command queueing, SSE event streams, code completion, tool registry and confirmation rules, AST indexing, RAG/vector search over the workspace, integrations configuration, knowledge graph operations, task board management, and workspace checkpoint/rollback. This is the contract the VS Code and JetBrains plugins and the GUI call over `http://127.0.0.1:/v1`.

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/refact-engine-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

A second provider on the same verified email joins the account you already have.

API entry from apis.yml

apis.yml Raw ↑
aid: refact-ai:refact-engine-api
name: Refact Agent Engine API
description: 'Local HTTP/LSP API exposed by the Rust `refact-lsp` engine that runs inside the user''s
  IDE or as a standalone server. Implements the agent runtime: provider/model capabilities, chat command
  queueing, SSE event streams, code completion, tool registry and confirmation rules, AST indexing, RAG/vector
  search over the workspace, integrations configuration, knowledge graph operations, task board management,
  and workspace checkpoint/rollback. This is the contract the VS Code and JetBrains plugins and the GUI
  call over `http://127.0.0.1:<port>/v1`.'
humanURL: https://docs.refact.ai
tags:
- Artificial Intelligence
- Agents
- LSP
- HTTP
- Local
tags_raw:
- AI
- Agent
- LSP
- HTTP
- Local
properties:
- url: https://docs.refact.ai
  type: Documentation
- url: https://github.com/smallcloudai/refact/tree/main/refact-agent/engine
  type: SourceCode
- url: https://github.com/smallcloudai/refact
  type: GitHubRepository