SpecShield

APIyesOSS—FREEyesDOCS5/5
SP7.3#10 of 22
outWeb—Windows—Mac—Linux—Android—iOS

Ranked in Contract Testing Tools ·Free plan· paid from $89/mo

About

SpecShield is ranked #10 of 22 in contract testing tools on Inferse. It runs on API, Browser extension, Web. There is a free plan. Paid plans start at $89/mo.

Compared on contract testing tools

Free plan
Yesspecshield.io
Paid from
$75/mospecshield.io
Contract formats
OpenAPI (JSON/YAML), GraphQLspecshield.io
Consumer verification
Yesspecshield.io
Provider verification
Yesspecshield.io
Contract registry
Yesspecshield.io
GraphQL support
Yesspecshield.io
Self-hosted deployment
Yesspecshield.io

Facts

Purpose
SpecShield compares OpenAPI descriptions to flag changes that could break existing API consumers and reports results as GitHub checks.specshield.io · 29 Sept 2026
Breaking change detection
It flags removed endpoints, tightened types, and newly required fields on pull requests.specshield.io · 29 Sept 2026
Consumer registry
The consumer registry records which services depend on an API so the deploy gate can assess compatibility.specshield.io · 29 Sept 2026
Governance
It scores OpenAPI descriptions against OWASP and design rulesets on a 0–100 scale with a letter grade.specshield.io · 29 Sept 2026
Integrations
The product offers a GitHub App and Action, CLI for CI systems, IntelliJ plugin, SARIF output, and an MCP server for AI agents.specshield.io · 29 Sept 2026
GitHub checks
The GitHub App posts pull request checks with a diff and compatibility verdict, and can block merges when a consumer would break.specshield.io · 29 Sept 2026
Team features
The Team plan includes an enforced can-i-deploy gate, audit trail, bidirectional contract testing, Slack alerts, shared workspace, and RBAC.specshield.io · 29 Sept 2026
Security evidence
The maker says its audit log records logins, invites, role changes, contract publishes, deploy verdicts, and breaking-change detections in an append-only table, with CSV export.specshield.io · 29 Sept 2026
Free diff privacy
The free browser diff compares submitted specs in the request and says it does not persist them.specshield.io · 29 Sept 2026
Supported specs
The browser diff accepts OpenAPI specifications in JSON or YAML, including OpenAPI 3.0 and 3.1.specshield.io · 29 Sept 2026
Who it is for
The maker describes the product for backend, mobile, platform, microservices, and release engineering teams shipping OpenAPI APIs.specshield.io · 29 Sept 2026
Free plan limit
The Free plan is limited to one user and includes seven-day compare history and one GitHub App pull request check.specshield.io · 29 Sept 2026
Support
Free includes community support, Team includes priority email support, and Enterprise includes a dedicated SLA.specshield.io · 29 Sept 2026

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Sources