x402 PayTo Pre-Flight

https://payto-preflight.hergertsynthora.com/service

● healthy a2a-agent

x402 PayTo Pre-Flight: verify a payTo address against the live registry before paying. Detects payTo hijacking, stale endpoints and unknown resources. Deterministic, <200ms, no external network. 0.001 USDC via x402 on Base. SYNTHORA.

Paid verification

How it works

No sponsored paid call yet.

Pay this endpoint once from your own wallet (Base USDC, up to $1.00) and we call it and record what came back. Your wallet pays the listed recipient directly; Agent Tools never holds funds. Sponsored checks prove delivery; they do not count as demand.

Quality grade

How grading works

B 78.6 / 100

Availability 40.0 / 40

Endpoint responded (HTTP 402)

Payability 20.0 / 20

✓ Answers a real HTTP 402 challenge
✓ Publishes a /.well-known/x402 descriptor
✓ Payment address on record
✓ Settlement network declared
✓ Price declared

Demand 18.6 / 40

18 distinct payers, 148 USDC transfers in the last 30 days

Owner verified 0.0 / 3

Nobody has claimed this listing yet

Endpoint last checked 4 h ago. On-chain activity last read 2 d ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass.

How to call

cURL · x402-fetch / x402-axios will auto-handle 402

curl -sS -i -X GET https://payto-preflight.hergertsynthora.com/service  # expect HTTP 402 Payment Required (about 0.01 USDC/call)

/.well-known/x402.json

https://payto-preflight.hergertsynthora.com/.well-known/x402

Listed in

Directories this entry was found in.

a2a x402