the402 endpoint detail

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app.heinrichstech.com cdp json-repair

https://app.heinrichstech.com/v1/cdp/json-repair

payable, partial

BitBooth JSON Repair: take any almost-JSON string (LLM tool output, broken API response, etc.), fix the common errors (trailing commas, single quotes, unquoted keys, missing brackets), and optionally validate against a JSON Schema. Built for AI agents that wrap every tool call in defensive parsing. Pay 0.001 USDC per call, no API key, no subscription.

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse. It advertises 8 ways to pay and only 6 of them are usable.
Price
$0.001
Network
base
Pay to
0xDa2F35d283c42dd60B965322394bc658a5c1769F
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
62 ms
Payment options
6 usable of 8
Last checked
2026-08-10T09:14:14.173Z (1d ago)
Category
ai-inference

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapp.heinrichstech.com%2Fv1%2Fcdp%2Fjson-repair"