SpecLynx Editor

A browser-based OpenAPI editor with real-time validation, smart autocompletion, and live preview. No installation required — runs entirely client-side with all processing in-browser. Supports OpenAPI 2.0, 3.0.x, and 3.1.x in both JSON and YAML. Free and open-source under Apache 2.0.

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/editor"
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: speclynx:editor
name: SpecLynx Editor
tags:
- API Design
- Browser
- Developer Tools
- OpenAPI
- Online Tool
humanURL: https://speclynx.com/editor/
properties:
- url: https://speclynx.com/editor/
  type: Documentation
- url: https://editor.speclynx.com/
  type: Portal
description: A browser-based OpenAPI editor with real-time validation, smart autocompletion, and live
  preview. No installation required — runs entirely client-side with all processing in-browser. Supports
  OpenAPI 2.0, 3.0.x, and 3.1.x in both JSON and YAML. Free and open-source under Apache 2.0.