🔍 Detect API model dilution and fingerprint which LLM is actually running behind any OpenAI-compatible or Anthropic endpoint

Public APIs is a community-curated collective list of over 1,400 free APIs organized across 50+ categories, maintained by contributors and the team at APILayer. It is one of the most popular open-source projects on GitHub with over 400k stars.

Node.js demo showing parallel API aggregation, advanced async patterns, error handling, and production-ready wrappers using Promises and async/await.

kubernetes CRD pattern tutorial and sample

APIs.io is an open source API search engine and directory that uses APIs.json files to discover, index, and catalog APIs across the web. Built on the APIs.json specification, it provides a searchable entry point for developers to find public APIs by keyword, resource, action, persona, domain, and schema.

API Harmony was an API discovery and recommendation tool from IBM Research that used graph-based search, machine learning, and cognitive technologies to help developers find, compare, and select compatible APIs. It was offered as a cloud service on IBM Bluemix and has since been discontinued.

🎟️ Event Scheduler - learning project that simulates a microservices-based event management platform with ticketing, feedback, promo codes, gRPC aggregation, and modern architecture (DDD, CQRS, Redis, MSSQL, Docker).

OpenAI-compatible examples for DeepSeek, Qwen, GLM, Claude, GPT, and ModelPort Global

A prototype that uses graphql for aggregating three different RESTful endpoints

精选大语言模型API资源列表 | Awesome LLM API Resources | 涵盖OpenAI/Claude/Gemini/国产大模型全对比

Practical guide to AI API aggregation across domestic and global models

ODDE Search - A modern meta search engine that unifies web, news, and images into one intelligent search experience.

Node/Express service aggregating credit data from three upstream APIs into one response per lookup — SQLite cache-aside, parallel fetching, and Jest + Cypress tests.

A simple backend for front-end demo

An index and topic collection covering API aggregation, marketplaces, directories, unified APIs, and catalog platforms. API aggregation brings together multiple APIs under a single interface, simplifying integration, reducing maintenance overhead, and enabling consistent authentication and data normalization across disparate services.

Whendarr is an open source, self hosted calendar that aggregates release data from *arr services into a simple monthly interface.

Tray.io (now also known as Tray.ai) is an AI-ready integration platform as a service (iPaaS) that enables businesses to integrate and automate workflows across cloud applications using a visual editor, pre-built connectors, and API-level access.

Finverse is a unified open finance API platform providing aggregated access to banking data, payments, and financial services across Asia-Pacific. Often described as the Plaid for Asia, it connects to over 40 banks across Hong Kong, Singapore, Philippines, Vietnam, and other Southeast Asian markets.

APIs.json is an open, machine-readable specification that API providers can use to describe their API operations, similar to how websites use sitemap.xml. The format provides a lightweight means for individuals and organizations to document the location of their APIs, associated descriptions, human and machine-readable specifications, and…

DigitalAPI is an API catalog, marketplace, and management platform that unifies APIs across multiple gateways into a single searchable catalog with governance, discovery, access control, and analytics.