SchemaWatch | OpenApi.tools, from APIs You Won't Hate
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SchemaWatch

Monitor third-party API schemas for breaking changes. Get quality scores, track historical versions, and get alerted before production breaks.

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More Details

OpenAPI Versions Supported

v2.0 v3.0 v3.1

Languages

Overview

SchemaWatch is an API schema monitoring tool that crawls third-party API specifications (OpenAPI/Swagger), detects breaking changes, and alerts teams before production breaks. It maintains historical schema versions in an append-only database, creating a data moat that grows more valuable over time.

Features

  • Quality Scoring — Get an A-F grade for any OpenAPI spec with detailed category breakdowns (Completeness, Consistency, Documentation, Security, Best Practices, Machine Readability)
  • Breaking Change Detection — Automatically detect removed endpoints, changed parameters, modified response schemas, and other breaking changes
  • Historical Tracking — Store every version of every schema, enabling diff views between any two points in time
  • Email Alerts — Get notified when schemas change, with configurable alert thresholds
  • Free Validator — Validate any OpenAPI/Swagger spec URL instantly, no signup required
  • API Quality Leaderboard — See how popular APIs rank by spec quality (Stripe, GitHub, Slack, Twilio, etc.)
  • Embeddable Badges — Show your API quality score in your README with SVG badges

Usage

  1. Visit schemawatch.tuvia.nl/validate
  2. Paste any OpenAPI/Swagger spec URL
  3. Get instant quality score and analysis
  4. Optionally sign up for free monitoring (3 APIs)

API Access

curl -X POST https://schemawatch.tuvia.nl/api/v1/validate \
  -H "Content-Type: application/json" \
  -d '{"url": "https://petstore3.swagger.io/api/v3/openapi.json"}'
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