Enterprise-ready API tooling

Parse, validate, transform, and work with OpenAPI, AsyncAPI, Arazzo, Overlay, and JSON Schema using one consistent toolchain.

Built by Swagger alumni, OpenAPI Initiative contributors, and AsyncAPI spec maintainers. Meet the team →

Explore the stack Try the editor

Works with

OpenAPI OpenAPI Specification
AsyncAPI AsyncAPI Specification
Arazzo Arazzo Specification
JSON Schema JSON Schema Specification
Overlay Overlay Specification

Why API specification work still gets messy

Your API specs may be standardized, but the workflows around them rarely are. Teams still have one script for bundling specs, another for linting them in CI, another for converting them for docs, and another for preparing them for release. The result is duplicated logic, inconsistent checks, and fragile automation around the contracts your systems depend on.

One toolchain, multiple use cases

Use one workflow across specification standards

Work consistently with OpenAPI, AsyncAPI, Arazzo, Overlay, and JSON Schema, whether your specs are written in JSON or YAML.

Validate specs the same way everywhere

Use the same validation, normalization, and transformation logic in editors, CI pipelines, review workflows, and internal platforms.

Build on top of SpecLynx

Use SpecLynx as a programmable layer for developer platforms, documentation systems, governance workflows, and custom specification tooling.

One ecosystem for working with API specifications

SpecLynx combines core tooling, developer workflows, and editing surfaces into one consistent stack.

Core library

ApiDOM

Parse and work with API and workflow specifications through one consistent structure.

  • ✓ One API for all specs
  • ✓ Semantic parsing
  • ✓ Query & traverse
  • ✓ Format conversion
Explore ApiDOM
Integration library

Language Service

Add specification-aware validation, navigation, and tooling features to your own editor or platform.

  • ✓ 12+ LSP features
  • ✓ Multi-spec support
  • ✓ Easy to integrate
  • ✓ 15+ years of Swagger/OpenAPI expertise
Explore Language Service
Command line

CLI

Run validation, transformation, and specification processing in local workflows and CI.

  • ✓ CLI-first workflow
  • ✓ Overlay 1.x support
  • ✓ JSON & YAML
  • ✓ npm or npx
Explore CLI
Browser editor

Editor

The fastest way to work with specifications in the browser, built on the same core as the rest of SpecLynx.

  • ✓ Zero installation required
  • ✓ Real-time validation
  • ✓ Smart autocompletion
  • ✓ Works on any device
Explore Editor
VS Code extension

OpenAPI Toolkit

Bring SpecLynx capabilities into VS Code for editing, validation, and feedback while you work.

  • ✓ Context-aware autocompletion
  • ✓ Instant error detection
  • ✓ Live API preview
  • ✓ Works in browser & desktop
Explore OpenAPI Toolkit

Work with us

SpecLynx is free to use. We help teams integrate it into internal tooling, standardize API and workflow specifications, and adopt it across their platform.

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In use by teams building API tooling and internal platforms

Jentic Powering Arazzo Tools & API Scorecard

Local-first by default

Runs locally
Works offline
No accounts
No telemetry