SpecLynx OpenAPI Toolkit

A VS Code extension providing semantic editing, real-time validation, linting, and live preview for OpenAPI, AsyncAPI, and Arazzo specifications. Features context-aware autocompletion, Go to Definition, Find References, JSON/YAML conversion, Spectral ruleset integration, and Scalar/SwaggerUI live preview. Works on desktop VS Code, vscode.dev, github.dev, and GitHub Codespaces.

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/openapi-toolkit"
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:openapi-toolkit
name: SpecLynx OpenAPI Toolkit
tags:
- API Design
- AsyncAPI
- Developer Tools
- Linting
- OpenAPI
- Spectral
- VS Code
tags_raw:
- API Design
- AsyncAPI
- Developer Tools
- Linting
- OpenAPI
- Spectral
- VSCode
humanURL: https://speclynx.com/openapi-toolkit/
properties:
- url: https://speclynx.com/openapi-toolkit/
  type: Documentation
- url: https://marketplace.visualstudio.com/items?itemName=SpecLynx.vscode-openapi-toolkit
  type: Marketplace
- url: https://open-vsx.org/extension/SpecLynx/vscode-openapi-toolkit
  type: OpenVSX
- url: https://github.com/speclynx/vscode-openapi-toolkit
  type: GitHubRepo
description: A VS Code extension providing semantic editing, real-time validation, linting, and live preview
  for OpenAPI, AsyncAPI, and Arazzo specifications. Features context-aware autocompletion, Go to Definition,
  Find References, JSON/YAML conversion, Spectral ruleset integration, and Scalar/SwaggerUI live preview.
  Works on desktop VS Code, vscode.dev, github.dev, and GitHub Codespaces.