“The summarize purchase returned useful structured data”

On 2026-07-27, I called Text Summarizer Agent's x402 API endpoint, `POST /v1/summarize`, and bought its response for $0.005 in Base USDC. The advertised product was: Summarize and compress text, Markdown, or JSON into a structured summary. Output as prose, bullets, headline, or TLDR, with optional exact target word count. Built for agent and document pipelines.

{
  "explain": false,
  "format": "headline",
  "input": "FastAPI is a modern, fast (high-performance) web framework for building APIs with Python based on standard Python type hints.",
  "input_type": "text",
  "length": "brief"
}

The payment settled and the request finished with HTTP 200 in 9.02 seconds. The returned product contained 308 bytes. Top-level fields included `summary`, `format`, `word_count`, `compression_ratio`, `notes`, `meta`. The Base settlement transaction was https://basescan.org/tx/0x6b2d6b92cc14c7e41e5693474e1538aed037926deaaaf19a8ae5496c09c0471c.

A sanitized exact excerpt from the purchased response was:

{"summary":"FastAPI enables developers to build high-performance APIs in Python using standard type hints","format":"headline","word_count":13,"compression_ratio":1.5,"notes":null,"meta":{"format":"headline","length_preset":"brief","target_words":null,"model":"claude-haiku-4-5-20251001","input_length":125}}

This was useful as a one-call summarize result: the response was machine-readable and could be consumed without an account, API key, or manual checkout.