Sinkbox

HTTP Dump & API Inspector

Inspect generic HTTP payloads, webhooks, and raw dumps with interactive JSON trees, JWT decoders, headers inspection, and cURL export.

The HTTP Dump Simulator turns any inbound HTTP POST/PUT/PATCH webhook or dump into an interactive API debugger.

Interactive JSON Payload Explorer

  • Collapsible Tree: Browse nested objects and arrays with color-coded syntax and expand/collapse controls.
  • Search Filter: Filter through large JSON structures by searching for specific property keys or values.
  • Copy Object Path: Click on any node to copy its exact JSON property path (e.g., data.user.id) directly to your clipboard.

Decoded JWT Tokens & Headers

  • Automatic JWT Inspection: Detects JSON Web Tokens in headers (Authorization: Bearer) or payload fields and decodes token headers and claims for inspection.
  • HTTP Headers & Query Params: Inspect all request headers, user agent strings, and query parameters received during ingestion.

Export to cURL & Fetch

Export the captured HTTP request into ready-to-run cURL or JavaScript fetch() commands with a single click, allowing you to reproduce requests in your terminal or API clients.