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OpenAPI JSON Diff & Breaking Change Checker

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Compare two OpenAPI 3.0/3.1 JSON specs before release. Flag removed endpoints, newly required inputs and selected type or enum changes. Get an HTML review, CSV findings and JSON for release workflows. Focused change checks, not a complete compatibility validator.

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from $0.35 / completed api spec comparison

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yipee Gameplay

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OpenAPI Spec Diff Auditor

junipr/openapi-spec-diff-auditor

Diff OpenAPI specs for breaking changes, added or removed endpoints, required parameters, response drift, and schema compatibility. by default.

junipr

OpenAPI Breaking Change Checker

ceddl/openapi-consumer-breakage-gate

Compare baseline and revision OpenAPI 3.x contracts against a versioned consumer profile. Get breaking-change findings plus checked waivers and SARIF, JUnit, JSON, and Markdown evidence for API release decisions.

Cedric Günther

OpenAPI Spec Drift Detector

stellar_ballet_0bu/openapi-spec-drift-detector

Compare two OpenAPI 3.0/3.1 specs (JSON or YAML) and emit per-endpoint / per-operation / per-schema change rows with a `breaking` flag. Pairs with the api-response-delta-monitor.

Nikita S

OpenAPI Contract & Breaking Change Monitor

quanmatrix/openapi-breaking-change-monitor

Use this Actor to monitor openapi contract and breaking change changes and return decision-ready change signals. Compare OpenAPI specifications and identify removed paths, methods, parameters, responses, and required-field changes before clients break.

Rafael Barreto Haddad

OpenAPI Consumer Breakage Gate

quietrelay/openapi-consumer-breakage-gate

API contract monitor for OpenAPI 3.0/3.1. Catch consumer-breaking changes before release: compare an HTTPS spec to a baseline and export Dataset findings, SUMMARY, SARIF, and JUnit for CI or schedules.

quiet relay

OpenAPI Breaking Change Detector

bmiller1009/openapi-breaking-change-detector

Compare two OpenAPI specs and identify breaking, non-breaking, and noteworthy API contract changes.

Sentinel Signal

OpenAPI Change Monitor

prophed/openapi-change-monitor

Monitor OpenAPI JSON/YAML specifications and output structured breaking/non-breaking API change records.

Prophed Com

OpenAPI Breaking Change Monitor

silicon1235/openapi-breaking-change-monitor

Monitor public OpenAPI specs for removed paths, operations, operation IDs, and security schemes.

X L

Third-Party OpenAPI Change Monitor

monema/third-party-openapi-change-monitor

Monitor public OpenAPI and Swagger specifications for structural changes. Get persistent baselines plus review-oriented records for removed operations, new required inputs, response/schema changes, and additive updates.

Maarten Vreeburg

SpecDelta — Signed AI Tool Compatibility Receipts

analytical_gratefulness/specdelta

Detect breaking changes and permission expansion in MCP, OpenAI function-tool, and OpenAPI 3.x schemas. Finds removed operations, newly required fields, type or enum narrowing, tighter bounds, and risky descriptions; returns an Ed25519-signed compatibility receipt via REST or MCP.