Automatically validate API requests and responses with OpenAPI 3 and Express.
HTTP2 client, just with the familiar `https` API
x402 Payment Protocol Extensions
A straightforward forward-proxy.
Transcend MCP Server — unified server with all domain tools.
Error comparison and information related utility for node and the browser
Controller with middleware for logging requests and responses to restricted and permissions-related methods
Core library for interfacing with AutoRest generated code
Node.js body parsing middleware
A small fast zlib stream built on [minipass](http://npm.im/minipass) and Node.js's zlib binding.
WebSocket protocol handler with pluggable I/O
Shared OpenAI SDK base adapters for TanStack AI providers using Chat Completions and Responses APIs.
Cypress's fork of a simplified HTTP request client.
Developer-friendly & type-safe Typescript SDK specifically catered to leverage *@unkey/api* API.
Isomorphic fetch with response parsing taken care of for you (based on headers) and response binding built in
Local proxy server that converts any Chat Completions / Anthropic Messages API into OpenAI Responses API so Codex and Claude Code can use any LLM.
Utility functions
OpenAI-compatible Responses API gateway for Codex, CLI tools and developer agents.
Helpers for context windows, usage normalization, compaction, and cost estimation.
Full BCP 47 language subtag data from the official IANA repository, in JSON format with multiple indices.
Seamless REST/GraphQL API mocking library for browser and Node.js.
nodejs wrapper for nektos/act
Interact with HTTP status code
mock http request response