Show HN: SpecShield – Contract testing and can-I-deploy gates for OpenAPI

Category: devtools

Tags: openapi, contract-testing, api-governance, ci-cd, breaking-changes

Score: 6.3/10 (Innovation: 6, Technical: 6, Documentation: 4, Utility: 7)

SpecShield is a commercial contract-testing service for OpenAPI that detects breaking changes in pull requests and enforces consumer-aware deploy gates. It stands out by combining diffing, a consumer registry, and CI integrations (GitHub App, CLI, IntelliJ, MCP) to catch API compatibility issues before production.

Target audience: backend developers, API platform teams, DevOps engineers

Repository: https://specshield.io/

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