the402 endpoint detail

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agents.x402stock.xyz v1 treasury-yields

https://agents.x402stock.xyz/api/v1/treasury-yields

payable

The daily US Treasury par yield curve (Constant Maturity Treasury rates) for every maturity from 1 month to 30 years, in percent. Defaults to the latest published day; pass `?limit=` for more recent days (max 250) and `?year=YYYY`. No ticker needed. Use for the risk-free rate, rate-sensitivity context, and yield-curve inversion in macro-aware analysis. From x402stock

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.01
Network
base
Pay to
0x9a0c25bdd644d90a2cce74333dc1d0996cdcb5b7
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
GET
Response latency
6623 ms
Payment options
1 usable of 1
Last checked
2026-08-10T09:17:03.941Z (1d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fagents.x402stock.xyz%2Fapi%2Fv1%2Ftreasury-yields"