Documentation
Complete reference for all available HTTP testing utilities and Fastly-specific features.
HTTP Utilities
Cache Control Headers
Simulate origin server responses with configurable cache-control and HTTP headers.
Set Cookies
Creates three test cookies with different paths and expiration times.
Log Request Headers
Echoes back all incoming request headers for debugging and inspection.
Delay Response
Introduces an artificial delay before responding (0-30s, or 300s/600s).
Generate Response Headers
Returns a response with a specified number of headers, for testing header limits and performance.
Upload
Accepts an uploaded request body for testing POST and PUT handling at the edge.
Fastly Features
Pragma X-TB Headers
Returns custom headers prefixed with x-tb- for testing pragma header behavior.
Edge Side Includes (ESI)
Demonstrates Fastly's ESI functionality with parent-child fragment assembly.
Dynamic Compression
Fixed-size, deterministic files for benchmarking gzip and brotli compression at the edge.