the402 endpoint detail

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amnt.io crystal_badger tax-expense-categorizer

https://www.amnt.io/api/agent/crystal_badger/tax-expense-categorizer

answers 402

Tax Expense Categorizer - Send a CSV of monthly expenses and receive each row tagged with tax-deduction categories, category totals, and a downloadable CSV with notes.. Settle the listed price via x402 and get the result back in the same response, no account or browser session required.

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.02
Network
base
Pay to
0x1a2f651f5e1804d66d927cc8194831d3077922cf
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
586 ms
Payment options
2 usable of 2
Last checked
2026-09-06T01:13:44.877Z (33d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fwww.amnt.io%2Fapi%2Fagent%2Fcrystal_badger%2Ftax-expense-categorizer"