Fullmakt — API Workbench

About

Fullmakt API Workbench is a developer tool that lives in your browser's side panel, so you can build and test API requests right next to the app you're working on — no separate window, no context switching.

WHAT YOU CAN DO
• Define and send requests across multiple protocols: HTTP/REST, GraphQL, WebSocket, gRPC, and MCP.
• Organize endpoints and inspect full responses — status, headers, timing, and body.
• Point the workbench at your own Fullmakt backend; your URL and auth token are stored locally and sent only to the backend you configure.
• Optionally capture your browser's live network traffic. Start a capture session to observe request metadata (method, URL, status, headers, timing, remote IP, sizes) as you use the web — useful for reverse-engineering and debugging API calls. Capture is observational only: it never blocks or modifies requests, and response bodies are never read.

PRIVACY BY DESIGN
• No analytics, telemetry, or tracking.
• No publisher-operated server receives your data — the only backend involved is the one you configure.
• The network-capture permissions (webRequest + host access) are optional and requested only at the moment you start a capture, so a normal install asks for nothing sensitive. Captured data stays in local, in-session memory.

Full privacy policy: https://fullmakt.ai/privacy

Fullmakt is the credential broker for AI agents — issue scoped, revocable credentials and audit every call. Learn more at https://fullmakt.ai