Catch API breaking changes before they ship

A deterministic compatibility checker built for AI agents. Compare two OpenAPI, GraphQL, or JSON Schema contracts and get structured, reproducible findings — the core diff runs without any LLM.

35+detection rules
3contract formats
8MCP tools
8REST endpoints
1.0benchmark F1
Deterministic MCP-ready 100% reproducible

Breaking change diff

Compare two contract versions and get a structured, reproducible finding set.

Format

Multi-version chain diff

Analyze v1 → v2 → … → vN transitions across three contract versions.

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SemVer version suggestion

Derive the required major / minor / patch bump from a diff result.

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Compatibility migrations

Get step-by-step migration suggestions for every breaking change.

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SARIF 2.1.0 export

Export diff results as SARIF for GitHub Code Scanning and other static-analysis tooling.

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Release changelog

Generate markdown release notes directly from contract changes.

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Consumer-aware impact scan

Which changes actually affect the paths / schemas / fields your agent uses? Classic diff tools answer "is it breaking for everyone" — this answers "is it breaking for me".

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MCP tools for AI agents

Point any MCP-compatible agent at the /mcp endpoint and it gains six tools out of the box.