Atrahasis Features
Everything you need to develop, design, test, and ship APIs — from a single HTTP request to a CI/CD-gated load test.
Every protocol, every method, every response surface.
🌐
HTTP Client
Full HTTP client with every method and body type.
- GET, POST, PUT, PATCH, DELETE, HEAD, OPTIONS
- JSON, XML, form-data, URL-encoded, binary
- Query params, path variables, custom headers
⚡
HTTP/3 & QUIC
Latest protocols with automatic negotiation.
- HTTP/1.1, HTTP/2, HTTP/3 (QUIC)
- Automatic protocol selection
- Connection pooling and reuse
📊
GraphQL
Full GraphQL client with schema explorer.
- Query, mutation, and subscription support
- Schema introspection with visual builder
- Variables, headers, and auth per request
🔌
WebSocket
Real-time bidirectional connections.
- Text, binary, ping, pong, close frames
- Subprotocols and custom handshake headers
- Handshake detail and full message history
📡
Server-Sent Events
Real-time one-way event streaming.
- Live event viewer with filtering
- Automatic reconnection
- Last-Event-ID resume support
🔗
URL Autocomplete
Smart URL suggestions from your history.
- Case-insensitive substring matching
- Method badge and status code display
- Keyboard and click navigation
🔍
Response Viewer
Five tabs for every response detail.
- Body, Headers, Cookies, Detail, and Contract tabs
- Auto-format JSON and XML with syntax highlighting
- Streaming preview for large bodies
⏱️
Timing Breakdown
Per-phase timing for every request.
- DNS, TCP, TLS, request, TTFB, download
- Headers and body size split for both directions
- TLS certificate detail on every HTTPS response