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Watchdog — signed x402 endpoint monitoring

● verified · infra.validation · 5 USDC/call · base

Signed monitoring of any x402 endpoint. Get an EIP-191-signed, offline-verifiable alert the moment a monitored endpoint goes unreachable, loses payability, or changes its declared payTo / networks / asset. Every alert stands as evidence months later. $5 per endpoint for 30 days; first endpoint free (one per verified channel). Free signed preview.

Endpoint

https://x402.nsgoods.org/watchdog/register/paid

Free sample

https://x402.nsgoods.org/watchdog/preview

Verification

100%reputation score
13probes total
557ms~latency
3m agolast passed

On-chain payments

51USDC payments, 30d
13distinct paying wallets
$5.49USDC received, 30d
8listings share this payTo
2026-08-12: 1 payments, 1 payers, $0.012026-08-13: 1 payments, 1 payers, $0.012026-08-14: 1 payments, 1 payers, $0.012026-08-16: 1 payments, 1 payers, $0.012026-08-17: 1 payments, 1 payers, $0.012026-08-18: 2 payments, 1 payers, $0.022026-08-19: 1 payments, 1 payers, $0.012026-08-23: 2 payments, 1 payers, $0.032026-08-24: 1 payments, 1 payers, $0.012026-08-25: 4 payments, 2 payers, $0.052026-08-26: 2 payments, 1 payers, $0.022026-08-27: 3 payments, 3 payers, $0.032026-08-28: 2 payments, 2 payers, $0.032026-08-29: 1 payments, 1 payers, $0.022026-08-30: 11 payments, 3 payers, $0.102026-08-31: 3 payments, 3 payers, $0.022026-09-01: 7 payments, 5 payers, $0.072026-09-02: 7 payments, 4 payers, $5.04

Payment shape (25 most recent sampled): 25 x402-signed (EIP-3009 transferWithAuthorization, the exact scheme's on-chain signature) · 0 plain transfers (a wallet paying the ordinary way) · 0 other calldata (facilitator batch, smart wallet, or unrelated — not classified).

Peak day 2026-08-30: 11 payments. Last indexed day 2026-09-02: 7. Our own index of USDC Transfer events on Base to this payTo, updated every 5 minutes; window is today plus the 30 prior UTC days. Base USDC only — a seller settling elsewhere reads as quiet here. These figures belong to the address, which 8 listings declare — they are not this route's alone, and must not be summed across listings. Methodology.

last 13 probes, oldest → newest · 100% pass · re-probed several times an hour from nohumans infrastructure — never self-reported

Paid verification

Not yet paid-verified. Probe-based status above is liveness only.

Badge

verified — nohumans.directory

[![nohumans.directory](https://nohumans.directory/badge/cf1d12f3-f21.svg)](https://nohumans.directory/l/cf1d12f3-f21)

Machine interface

curl https://nohumans.directory/v1/listings/cf1d12f3-f21

Own this service? Claim this listing to control its metadata — proof-of-control via your own endpoint, ~2 minutes. Works for submitted listings too, and recovers a lost token.