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.

clawsgo.cn 完整复刻：前端原样产物 + 零依赖 Node 复刻后端（211 条命令）+ 219 项端到端验收全绿。MIT.

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

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

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

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

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

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.

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

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.

Document QA prototype with upload workflow, question-answering interface, and AI application engineering notes.

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

Contracts and TypeScript clients generated from a running ASP.NET Core 10 API. The client reads and writes exactly the JSON the server does — int64, decimal and date offsets intact — and what cannot be described is reported, never guessed.

lenscheck-contract — your Django backend keeps a list of what it does, and can't lie about it. Runtime companion to pryti-semantic-reviewer.

Detect API schema drift before your integrations break.