skills.rest
KILWA73
KILWA73COMMUNITY
Explore all skills by this author →
GitHub

api-contract-tester

Validates backend responses against OpenAPI specification and generates deterministic tests.

Updated Apr 12, 2026
Search Tags:#openapi#backend#test-generation#drift-detection#contract-testing#api-testing#schema-validation
One-click install
npx skills add https://github.com/KILWA73/MiniSoc --skill api-contract-tester-kilwa73
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: api-contract-tester
Source: https://github.com/KILWA73/MiniSoc/tree/main/.agents/skills/api-contract-tester
Command: npx skills add https://github.com/KILWA73/MiniSoc --skill api-contract-tester-kilwa73

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Validates that backend responses strictly conform to the OpenAPI specification to prevent contract drift and regressions.

Core Features & Use Cases

  • Contract-first testing: validate endpoints against OpenAPI schemas.
  • Drift detection: identify mismatches between responses and the contract across multiple endpoints.
  • Test generation: automatically generate tests to enforce API contracts and prevent regressions.

Quick Start

Run the API contract tester on your endpoint to verify response conformance against your OpenAPI specification.

Frequently Asked Questions about api-contract-tester

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I validate backend responses against an OpenAPI specification?▼

Contract drift detection identifies mismatches between live backend JSON responses and defined OpenAPI schemas across endpoints, preventing frontend integration regressions and structural failures in development or staging environments.

How do I generate tests to enforce API contracts across endpoints?▼

Yes, schema validation covers error paths by comparing JSON responses from error scenarios against OpenAPI specifications to ensure backend error outputs conform strictly to the defined contract and prevent schema regressions.

What's the difference between contract testing and schema validation for APIs?▼

Schema validation checks individual JSON responses against OpenAPI definitions, while contract testing applies this schema validation across multiple endpoints and scenarios to output deterministic tests that prevent broader contract drift.

Can I use contract testing in staging environments to prevent API regressions?▼

Yes, contract testing applies to staging environments by validating backend responses against OpenAPI schemas across defined endpoints, automatically generating deterministic tests to prevent contract regressions before production deployment.

Related Skills

Explore More Software Engineering Skills→
dhruvinrsonidhruvinrsoni

api-implementation

Generate backend API route handlers, request validation, and response serialization from an OpenAPI specification.

Community
Advanced
cosmicstack-labscosmicstack-labs
364

api-testing

Validate REST and GraphQL APIs against OpenAPI schemas and contracts.

Official
Intermediate
mainsequence-sdkmainsequence-sdk
1

command-center-api-mock-prototyping

Validate Command Center API contracts with mock JSON responses.

Official
Advanced
apassuelloapassuello

automating-api-testing

Generate and execute API tests for REST and GraphQL endpoints.

Community
Intermediate