Free-tier api clients

Insomnia is an AI-native API collaboration platform for developers who design, test, debug, and manage endpoints across REST, GraphQL, gRPC, WebSocket, Socket.IO, and SSE workflows. It combines an API...

Screenshot Scout

Screenshot Scout is a managed screenshot API for developers. It captures screenshots of any URL through a single HTTP request and supports full-page captures, element capture, device emulation, viewport sizing, and pre-capture actions such as clicking or hiding elements.

Kreya

Kreya is a desktop API client for macOS, Windows, and Linux that supports gRPC, REST, GraphQL, WebSocket, and Server-Sent Events workflows from a single workspace. It includes request testing, snapshot comparisons, scripting, CLI automation, and Git-based project files for version control.

Postman

Postman is an API platform for designing, testing, documenting, monitoring, and distributing APIs and services. It includes an API client, collections and environments, specs, mock servers, Flows, CLI support, and workspace collaboration features.

OpenRouter

OpenRouter is a unified API and chat interface for accessing large language models from multiple providers through a single OpenAI-compatible endpoint. It supports model browsing, routing, fallback selection, and API key management for developers integrating LLMs into applications.

CurlHub.io

CurlHub is a no-install debugger for API requests. It lets developers inspect API traffic and create a simple request bin without installing local tooling.

Zero Sheets

Zero Sheets is a developer-focused service that turns Google Sheets spreadsheets into RESTful JSON APIs. It is designed to help teams rapidly build prototypes, websites, apps, and other data-driven products without creating a custom backend from scratch.

Apidog

Apidog is an all-in-one API platform for designing OpenAPI specifications, debugging requests against those specs, running automated API tests, publishing interactive documentation, and generating moc...

Hoppscotch

Hoppscotch is a developer-first API platform for creating, testing, documenting, and sharing APIs. It is designed to help teams move from prototyping to production without switching tools, and it supports both cloud use and self-hosted deployment.