Use this index to find the right guide. For a searchable reference inside the
terminal, run fetch -v -h.
- Getting Started — installation, first requests, output basics, and common tasks
- CLI Reference — complete command-line option reference
- Configuration — configuration files, precedence, and per-host settings
- Troubleshooting — common failures, diagnostics, and exit codes
- Request Bodies — raw data, JSON, XML, forms, multipart uploads, stdin, and editor input
- Authentication — Basic, Digest, Bearer, AWS SigV4, custom headers, and mutual TLS
- Output Formatting — content types, article extraction, files, paging, color, and binary output
- Image Rendering — terminal protocols, built-in decoders, and external adapters
- WebSocket — interactive and piped bidirectional connections
- gRPC — reflection, local schemas, protobuf conversion, and streaming
- Advanced Features — custom DNS, proxies, Unix sockets, HTTP versions, TLS, compression, sessions, and timing
- Encrypted Client Hello — ECH discovery, modes, configuration, and inspection
- Updates — manual and automatic updates, verification, and cache files
- Agent Skill — offline installation for supported coding agents