SpecLynx

SpecLynx provides enterprise-ready API tooling for authors and maintainers of OpenAPI, AsyncAPI, and Arazzo specifications. Built by veterans with 15+ years of Swagger and OpenAPI development experience, SpecLynx products prioritize security (specs never leave your machine), accuracy, and developer productivity. Core products include a VS Code extension, browser-based editor, CLI, language service library, and the ApiDOM semantic parsing engine. Every SpecLynx product is open source under the Apache-2.0 license; there are no paid plans.

SpecLynx publishes 6 APIs on the APIs.io network. Tagged areas include API Design, AsyncAPI, Developer Tools, JSON Schema, and OpenAPI.

The SpecLynx catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

SpecLynx’s developer surface includes documentation and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub

15.2/100 emerging ▬ flat Agent 0/100 human only self hosted · Apache-2.0 Full breakdown ↓
scored 2026-10-04 · rubric v0.23.0

6 APIs 17 Features

API Design AsyncAPI Developer Tools JSON Schema OpenAPI Toolkit VS Code

Kin Score

Kin Score How this is scored →
scored 2026-10-04 · rubric v0.23.0

Composite quality — 15.2/100 · emerging

Contract Quality 3.1 / 21

Developer Ergonomics 3.2 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.3 / 11

Contract Governance 1.0 / 10

Discoverability 5.9 / 9

Regulatory Posture 1.6 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/speclynx: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 6

Individual APIs this provider publishes, each with its own machine-readable definition.

SpecLynx

Stop wrestling with OpenAPI specs. SpecLynx OpenAPI Toolkit delivers the most effective way to author and manage your API specs, bringing unprecedented ease, pinpoint accuracy, ...

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 autocomp...

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-bro...

SpecLynx CLI

A command-line interface for overlay operations, dereferencing, bundling, format conversion (JSON/YAML), and validation of OpenAPI, AsyncAPI, Arazzo, and JSON Schema documents.

SpecLynx Language Service

An LSP-compatible npm library (@speclynx/apidom-ls) providing 13 intelligent editing capabilities for API description languages, including validation, completion, hover document...

SpecLynx ApiDOM

A unified semantic parsing engine that underpins all SpecLynx products. ApiDOM parses OpenAPI, AsyncAPI, Arazzo, and JSON Schema specifications into a semantic data model with l...

Features 17

Notable capabilities this provider offers.

Semantic Editing

Context-Aware Autocompletion

Real-Time Validation

Spectral Integration

Semantic Validation

Live Preview

Scalar Renderer

SwaggerUI Renderer

Go to Definition

Find References

JSON/YAML Conversion

Formatting

Dereferencing

Overlay Support

No Telemetry

Offline-First

Multi-Spec Support

Scroll for all 17

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Speclynx Context

5 classes · 11 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

SpecLynx API Rules

5 rules · 3 warnings 2 info

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

SpecLynx Completion Item

9 properties

JSON SCHEMA

SpecLynx Validation Result

7 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Speclynx Product Structure

0 properties

JSON STRUCTURE

Examples 1

Example request and response payloads for these APIs.

Speclynx Validation Result Example

5 fields

EXAMPLE

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Speclynx Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LlmsText

LlmsText

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

GitHubRepo

GitHubRepo

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Contact

Contact

Commercial 1

Pricing, plans, and the legal terms of use

License

License

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Marketplace

Marketplace

OpenVSX

OpenVSX

Source (apis.yml)

aid: speclynx
url: https://raw.githubusercontent.com/api-evangelist/speclynx/refs/heads/main/apis.yml
name: SpecLynx
description: SpecLynx provides enterprise-ready API tooling for authors and maintainers of OpenAPI, AsyncAPI, and Arazzo specifications.
  Built by veterans with 15+ years of Swagger and OpenAPI development experience, SpecLynx products prioritize security (specs
  never leave your machine), accuracy, and developer productivity. Core products include a VS Code extension, browser-based
  editor, CLI, language service library, and the ApiDOM semantic parsing engine. Every SpecLynx product is open source under
  the Apache-2.0 license; there are no paid plans.
type: Index
deliveryModel:
  model: self-hosted
  license: Apache-2.0
  open_source: true
  commercial: false
  callable_host: false
  label: Self-hosted open source · you run it yourself
  confidence: high
  source:
  - license
  generated: '2026-09-17'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-09-17'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/speclynx.png
access: 3rd-Party
tags:
- API Design
- AsyncAPI
- Developer Tools
- JSON Schema
- OpenAPI
- Toolkit
- VS Code
tags_raw:
- API Design
- AsyncAPI
- Developer Tools
- JSON Schema
- OpenAPI
- Toolkit
- VSCode
- JSON-Schema
created: '2026-01-02'
modified: '2026-05-02'
position: Consuming
segments:
- Developer Tools
- API Design
apis:
- aid: speclynx:speclynx
  name: SpecLynx
  tags:
  - API Design
  - Developer Tools
  - OpenAPI
  - Toolkit
  - VS Code
  tags_raw:
  - API Design
  - Developer Tools
  - OpenAPI
  - Toolkit
  - VSCode
  humanURL: https://speclynx.com/
  properties:
  - url: https://speclynx.com/
    type: Website
  - url: https://speclynx.com/openapi-toolkit/
    type: Documentation
  - url: https://github.com/speclynx/vscode-openapi-toolkit
    type: GitHubRepo
  - url: https://marketplace.visualstudio.com/items?itemName=SpecLynx.vscode-openapi-toolkit
    type: Marketplace
  description: Stop wrestling with OpenAPI specs. SpecLynx OpenAPI Toolkit delivers the most effective way to author and manage
    your API specs, bringing unprecedented ease, pinpoint accuracy, and unmatched power directly to your VSCode workflow.
    Supports OpenAPI 2.0/3.0/3.1, AsyncAPI 2.x, Arazzo 1.x, and JSON Schema.
- 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.
- 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.
- aid: speclynx:cli
  name: SpecLynx CLI
  tags:
  - CLI
  - Developer Tools
  - JSON Schema
  - OpenAPI
  - Tooling
  tags_raw:
  - CLI
  - Developer Tools
  - JSON Schema
  - OpenAPI
  - Tooling
  - JSON-Schema
  humanURL: https://speclynx.com/
  properties:
  - url: https://speclynx.com/
    type: Documentation
  description: A command-line interface for overlay operations, dereferencing, bundling, format conversion (JSON/YAML), and
    validation of OpenAPI, AsyncAPI, Arazzo, and JSON Schema documents.
- aid: speclynx:language-service
  name: SpecLynx Language Service
  tags:
  - API Design
  - Developer Tools
  - LSP
  - Library
  - OpenAPI
  humanURL: https://speclynx.com/language-service/
  properties:
  - url: https://speclynx.com/language-service/
    type: Documentation
  description: An LSP-compatible npm library (@speclynx/apidom-ls) providing 13 intelligent editing capabilities for API description
    languages, including validation, completion, hover documentation, Go to Definition, Find References, semantic tokens,
    formatting, dereferencing, and format conversion. Composable with any editor through an LSP wrapper.
- aid: speclynx:apidom
  name: SpecLynx ApiDOM
  tags:
  - API Design
  - Developer Tools
  - Library
  - OpenAPI
  - Parser
  humanURL: https://speclynx.com/apidom/
  properties:
  - url: https://speclynx.com/apidom/
    type: Documentation
  description: A unified semantic parsing engine that underpins all SpecLynx products. ApiDOM parses OpenAPI, AsyncAPI, Arazzo,
    and JSON Schema specifications into a semantic data model with lossless preservation of comments, key ordering, and source
    maps. Built on Tree-sitter for error recovery during editing. Isomorphic — works identically in Node.js and browser environments.
common:
- type: GitHubOrganization
  url: https://github.com/speclynx
- type: License
  name: Apache-2.0
  url: https://github.com/speclynx/vscode-openapi-toolkit/blob/main/LICENSE
- type: DomainSecurity
  url: security/speclynx-domain-security.yml
- url: https://speclynx.com/
  name: Website | SpecLynx
  type: Website
  description: 'null'
- url: https://speclynx.com/openapi-toolkit/
  name: OpenAPI Toolkit Documentation | SpecLynx
  type: Documentation
  description: 'null'
- url: https://marketplace.visualstudio.com/items?itemName=SpecLynx.vscode-openapi-toolkit
  name: VS Code Marketplace | SpecLynx OpenAPI Toolkit
  type: Marketplace
  description: 'null'
- url: https://github.com/speclynx/vscode-openapi-toolkit
  name: GitHub Repository | SpecLynx OpenAPI Toolkit
  type: GitHubRepo
  description: 'null'
- url: https://open-vsx.org/extension/SpecLynx/vscode-openapi-toolkit
  name: Open VSX Registry | SpecLynx OpenAPI Toolkit
  type: OpenVSX
  description: 'null'
- url: mailto:info@speclynx.com
  name: Contact | SpecLynx
  type: Contact
  description: 'null'
- name: Features
  type: Features
  data:
  - name: Semantic Editing
  - name: Context-Aware Autocompletion
  - name: Real-Time Validation
  - name: Spectral Integration
  - name: Semantic Validation
  - name: Live Preview
  - name: Scalar Renderer
  - name: SwaggerUI Renderer
  - name: Go to Definition
  - name: Find References
  - name: JSON/YAML Conversion
  - name: Formatting
  - name: Dereferencing
  - name: Overlay Support
  - name: No Telemetry
  - name: Offline-First
  - name: Multi-Spec Support
- type: LlmsText
  url: https://speclynx.com/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
specificationVersion: '0.23'

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