API middleware

10 reusable API middleware libraries across every platform — libraries, SDKs, and drop-in systems. You should never have to know which ecosystem it lives in.

• Asp.NetCore-Fundamentals

  by 149413 · Free · github

  📚 Learn .NET Core and C# fundamentals with this practical guide on SQL, OOP, LINQ, and web development using MVC and Web API for beginners.

  APIDatabase   C#

• Bowire

  by Kuestenlogik · Free · github

  Multi-protocol API workbench for .NET — discover, invoke, record, mock, replay across gRPC, REST, GraphQL, MQTT, SignalR, WebSocket, SSE, MCP, OData, Socket.IO, and more... including your custom protocol.

  APITesting   C#

• Foundgine

  by CristianBarragan · Free · github

  AI-native application runtime for .NET. Turn your domain model into a safe, semantic interface that AI agents can understand, plan, execute, and verify.

  AIAPI   C#

• honua-server

  by honua-io · Free · github

  Cloud-native multi-protocol geospatial server — GeoServices REST, OGC API, WMS/WFS/WMTS/WCS, STAC, OData v4, vector tiles, MCP, and gRPC, backed by PostGIS

  API   C#

• Https-Site-Screaper-Social-Commerce-Court-Web

  by Phyllmox · Free · github

  powerful web scraping tool designed to extract data from HTTPS-secured websites, including social media, e-commerce platforms, and court records, for analysis, monitoring, or research purposes.

  AICommerceAutomationAPI   C#Web

• Https-Site-Screaper-Social-Commerce-Court-Web

  by Synterraapt · Free · github

  powerful web scraping tool designed to extract data from HTTPS-secured websites, including social media, e-commerce platforms, and court records, for analysis, monitoring, or research purposes.

  AICommerceAutomationAPI   C#Web

• mockifyr

  by qorpe · Free · github

  Enterprise API mocking and integration sandbox platform — self-hosted, multi-protocol, one container.

  SimulationAPITesting   C#

• Protocol Buffers

  by Google · Free · BSD-3-Clause · middleware

  Language-neutral, platform-neutral mechanism for serializing structured data.

  SerializationAPI   C++JavaPythonGoC#JavaScript

• synentra

  by synentra · Free · github

  Intent‑aware governance gateway for autonomous AI agents that interact with enterprise APIs.

  AIAPISecurity   C#

• two-tier-user-management-api

  by UnagenteVld · Free · github

  🔧 Build a two-tier user management API using ASP.NET Core, featuring user CRUD operations and robust data handling with Dapper and CQRS.

  APIDatabase   C#