# API Linting

**Canonical:** https://apis.io/providers/linting/  
**APIs profiled:** 10

API Linting is a topic index for the tools, rulesets, vocabularies, and practices that automate API style guide enforcement across OpenAPI, AsyncAPI, JSON Schema, and adjacent contract formats. The collection catalogs the major open-source and commercial linters in use across the industry — Spectral, Vacuum, Redocly CLI, Optic, Apicurio, sweater-comb, Speakeasy, and Postman API governance — alongside shared schemas, JSON-LD context, and a working vocabulary so linting concepts can be reasoned about consistently across tools.

## Kin Score — 14.6 / 100 (emerging)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 14.6).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 15.5 |
| Governance | 25.0 |
| Contract Governance | 25.0 |
| Operational Transparency | 2.6 |
| Developer Ergonomics | 0.0 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## APIs (10)

- **Spectral** — Stoplight's flexible JSON/YAML linter for creating automated style guides, with baked-in support for OpenAPI v3.1, v3.0, v2.0, Arazzo v1.0, and AsyncAPI v2.x. Spectral is the de...
- **Vacuum** — A Go-based, ultra-fast OpenAPI linter inspired by Spectral and fully compatible with existing Spectral rulesets. Vacuum tears through API specs at light speed, ships interactive...
- **Redocly CLI** — Redocly's `lint` command identifies and reports problems in OpenAPI, AsyncAPI, Arazzo, or Open-RPC descriptions, helping teams "avoid bugs and make API or Arazzo descriptions mo...
- **Optic** — Optic catches breaking changes and applies lint rules to OpenAPI specs, generating OpenAPI from real traffic and keeping it accurate with automatic schema testing and patches. T...
- **Apicurio Registry** — Red Hat's open-source API/schema registry that stores and validates OpenAPI, AsyncAPI, JSON Schema, Avro, Protobuf, and GraphQL artifacts. While not a pure linter, Apicurio Regi...
- **Sweater Comb** — Snyk's TypeScript ruleset built on Optic CI that enforces consistency standards across OpenAPI specifications. Sweater Comb codifies the Snyk API Program's design rules so a gro...
- **Speakeasy Linter** — Speakeasy's OpenAPI validator with 90+ built-in rules across six categories — SDK generation, spec correctness, best practices, security, schema validation, and Speakeasy-specif...
- **Postman API Governance** — Postman Spec Hub's governance engine applies linting rules to OpenAPI 2.0, 3.0, and 3.1 specifications, surfacing violations directly in the Issues tab below the spec editor. En...
- **Stoplight Studio** — Stoplight's API design IDE embeds Spectral natively, surfacing ruleset violations as real-time editor feedback as designers author OpenAPI and JSON Schema. Studio is the canonic...
- **APIMetrics** — APIMetrics provides live-traffic API monitoring with a rule engine that evaluates JSON Schema and response-shape compliance on every production call. Unlike static linters, APIM...

## Security (1)

- **Linting Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

API Design, API Governance, API Linting, API Style Guide, AsyncAPI, JSON-Schema, Linting, OpenAPI, Quality Assurance, Topic

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/linting/). Scores are computed from the provider's own public artifacts under a published rubric.