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SpecShield

C
C tier on Contract Testing ToolsScore 6.9 · #10 of 22
Android app
Not listed
Free plan
Yes
Paid plans from
$89/mo
Runs on
api, Browser extension, Web
specshield.io
The SpecShield homepage
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Summary

SpecShield compares OpenAPI descriptions to flag changes that could break existing API consumers, then reports results as GitHub checks. It can detect removed endpoints, tightened types and newly required fields on pull requests. A consumer registry tracks which services depend on an API so a deploy gate can check compatibility. GitHub checks include a diff and compatibility verdict, and can block a merge when a consumer would be broken. SpecShield also scores OpenAPI descriptions against OWASP and design rulesets on a 0–100 scale with a letter grade. Integrations include a GitHub App and Action, a CLI for CI systems, an IntelliJ plugin, SARIF output and an MCP server for AI agents. The Free plan costs 0.00 USD per free and is limited to one user, with seven-day comparison history and one GitHub App pull request check. Team costs 89.00 USD per month, or $900/year ($75/mo billed annually), and includes up to 10 users, a consumer registry, deploy gate, audit trail, Slack alerts, shared workspace and RBAC. The browser diff accepts OpenAPI 3.0 and 3.1 in JSON or YAML; submitted specs are compared in the request and not persisted by that free diff.

Who it is for

SpecShield is for backend, mobile, platform, microservices and release engineering teams shipping OpenAPI APIs. It suits teams looking for compatibility checks in pull requests and deployment gates.

What is good

  • Flags breaking changes in pull requests.
  • Consumer registry tracks services that depend on APIs.
  • GitHub checks can block breaking merges.
  • Free browser diff does not persist submitted specs.
  • Supports OpenAPI 3.0 and 3.1 in JSON or YAML.

What to know first

  • Free is limited to one user.
  • Free includes one GitHub App pull request check.
  • Free comparison history lasts seven days.
  • Team costs 89.00 USD per month.

Verdict

SpecShield focuses on API compatibility checks tied to consumer dependencies, with additional governance scoring and team controls. The Free plan has tight user, history and GitHub-check limits.

SpecShield plans and pricing

All plans
SpecShield Free Free Free forever 1 user · unlimited spec comparisons · 1 GitHub App PR check · 7-day compare history · community support specshield.io · 29 Sept 2026
SpecShield Team $89/mo $89/month, or $900/year ($75/mo billed annually) Up to 10 users · consumer registry · can-i-deploy gate · audit trail · BDCT · Slack alerts · shared workspace · RBAC specshield.io · 29 Sept 2026
SpecShield Enterprise Not published Custom pricing Unlimited users · SSO · on-prem/private-cloud on request · advanced RBAC · audit-log export · dedicated onboarding · SLA specshield.io · 29 Sept 2026

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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