web · 8

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Watching what a web page sends: browser capture, screenshots, HAR and Fiddler SAZ files, and tracing each API request back to the bundle code that makes it. Other guides read and redact HAR files before you share them, convert WebAssembly to WAT, and list the tools a page exposes to browser AI agents through WebMCP. REA 6.4.0 reads HAR and mitmproxy captures; Fiddler SAZ files are converted to HAR first.

• Analyze a .pcap / .pcapng Capture Offline with REA

  Read a saved packet capture without replaying it: inspect endpoints, DNS, TLS SNI and protocols, then extract TShark fields as Evidence with inspect-pcap-capture and inspect-packet-capture.

  9 min read · REA 6.7.0

• Decode an X.509 Certificate (PEM) and Check the Chain Order

  Read a PEM or DER certificate's subject, issuer, SANs, validity, key usage and fingerprints, then check the chain order and trust with openssl verify.

  8 min read

• Decode Protobuf Without the .proto: Wire Types and gRPC Frames

  Read a protobuf or gRPC body with no schema: wire types, varint vs zigzag, string vs message vs packed, the gRPC 5-byte prefix, checked against protoc --decode_raw.

  8 min read

• HAR File Analyzer: Read, Summarize and Safely Share a HAR

  Export a HAR from Chrome, Edge, Firefox or Safari, read what is inside, group requests by endpoint, find slow calls and errors, and redact it before sharing.

  11 min read · REA 6.7.0

• Inspect and Diff WebAssembly Modules with REA 6.7 and WABT

  Use REA 6.7.0 inspect-wasm-artifact and compare-wasm-interfaces with WABT 1.0.42 to record a WASM module as Evidence and diff imports and exports across builds.

  8 min read · REA 6.7.0

• Trace Website API Calls with REA: Browser, HAR and Bundles

  Use REA to capture a page, take screenshots, observe network requests, read saved HAR captures, and find the front-end code that makes each API call.

  10 min read · REA 6.7.0

• WASM to WAT: Inspect a WebAssembly Module in Your Browser

  Convert WASM to WAT and read a WebAssembly module's imports, exports, memory, functions and custom sections in your browser, then confirm the result with wabt.

  9 min read

• WebMCP Explained: See Which AI Tools a Web Page Exposes

  What WebMCP is, how a page registers tools for browser AI agents, and how to list them with REA 6.7.0 without calling them, plus a diff that catches new tools.

  9 min read · REA 6.7.0