api-contract

Prevent OpenAPI Generator from redefining your Java contract. Contract-preserving client generation for Spring Boot — available on Maven Central.

Backend-native API workbench that detects when your running implementation disagrees with OpenAPI.

Git diff for your API responses.

A lightweight, Git-friendly tool for designing and collaborating on API contracts

通用系统工程化的系统架构搭建流程助手 Skill / A reusable system architecture builder skill for AI coding agents

Runtime-validated contracts, status-typed clients, and OpenAPI for Nuxt server routes.

Efficient expense tracking app for individuals and businesses. Log daily expenses, generate monthly reports, categorize spending, and integrate with a database. Check out the API contract: https://petstore.swagger.io/?url=https://raw.githubusercontent.com/pradipmudi/expensys/main/src/main/java/com/expensys/openapi/expensys_openapi.yml

Keeps hand-written contracts between languages in sync and stops AI coding agents from leaving one-sided changes: a Claude Code stop hook, contract drift checks, and an owner-approved map of every error fallback.

Design a format-agnostic internal IDL with a form-based console, live-compiling to OpenAPI 3.1 (REST) and protobuf/gRPC (RPC) contracts, with a built-in mock debugger. 开源可视化 IDL 建模工具，支持 Protobuf/gRPC，以图形化表单从零设计 RPC 接口契约，双向同步生成标准OpenAPI 3.1（REST）与 proto3 源码，落地 API-First 开发流程。 内置 mock 调试台方便前后端验收调试.

API workspace in plain markdown. Design specs, send requests, validate contracts from CLI, browser, and coding agents.

OpenAPI 3.1 definition and Assurance Graph for the Heyrafiki API.

A CLI tool that does health and idempotency checks for your REST APIs

Offener API-Vertrag zwischen der Open-Source-Handwerkersoftware OpenGewerk und dem Kanzlei-Hub für Steuerberater: OpenAPI 3.1, JSON-Schemas und Konformitätstests, versioniert nach SemVer, Apache-2.0.

API Contract & Mocking for Front-end — build without waiting for the backend.

Vue 2 and Element UI admin dashboard practice with routing, CRUD pages and API contract documentation.

Compact, validated data-layer manifests for token-efficient AI development — entities, endpoints, components and the requirements they serve, in one file your build can check.

Type-safe IPC for Electron — define the contract once and every argument, return value and event payload is inferred across main, preload and renderer. Zero runtime dependencies.

Claude Code plugin that keeps your app and backend API in sync: detects and fixes endpoint/contract drift (Flutter + FastAPI, stack-agnostic)

API (or Service) Contract example (for my own reference)

A VS Code extension that catches breaking API changes across Git revisions and identifies potentially affected consumers before they break.