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Useless Fact API

● verified · infra.utility · 0.001 USDC/call · base

Pay a tiny amount of USDC and receive one delightfully useless fact

Endpoint

https://x402uselessfacts.vercel.app/api/useless-fact

Verification

100%reputation score
2581probes total
520ms~latency
33m agolast passed

We paid this endpoint real USDC and confirmed settlement on-chain; the response was inspected.

On-chain payments

147USDC payments, 30d
65distinct paying wallets
$0.15USDC received, 30d
1listing share this payTo
2026-09-05: 3 payments, 2 payers, $0.002026-09-06: 43 payments, 1 payers, $0.042026-09-08: 1 payments, 1 payers, $0.002026-09-09: 3 payments, 3 payers, $0.002026-09-11: 7 payments, 7 payers, $0.012026-09-13: 6 payments, 4 payers, $0.012026-09-14: 18 payments, 14 payers, $0.022026-09-15: 7 payments, 4 payers, $0.012026-09-16: 6 payments, 2 payers, $0.012026-09-17: 6 payments, 5 payers, $0.012026-09-18: 8 payments, 8 payers, $0.012026-09-19: 11 payments, 10 payers, $0.012026-09-20: 1 payments, 1 payers, $0.002026-09-22: 12 payments, 12 payers, $0.012026-09-23: 1 payments, 1 payers, $0.002026-09-26: 6 payments, 5 payers, $0.012026-09-27: 1 payments, 1 payers, $0.002026-09-29: 1 payments, 1 payers, $0.002026-09-30: 1 payments, 1 payers, $0.002026-10-02: 1 payments, 1 payers, $0.002026-10-03: 1 payments, 1 payers, $0.002026-10-04: 3 payments, 3 payers, $0.00

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 2026-09-06: 43 payments. Last indexed day 2026-10-04: 3. Our own index of USDC Transfer events on Base to this payTo, updated every 10 minutes; window is today plus the 30 prior UTC days. Base USDC only — a seller settling elsewhere reads as quiet here. Methodology.

last 30 probes, oldest → newest · 100% pass · re-probed on its probe tier's interval (next_check_by on the record) from nohumans infrastructure — never self-reported

Paid verification

✓ verified with real payment — 2026-08-17 $0.001 USDC paid on Base · tx ↗ response: valid JSON (no schema declared)

Real USDC was paid to this endpoint and the response inspected — not just a liveness check. One-time verification at the date shown, not continuous.

[![paid-verified](https://nohumans.directory/badge/b74c6978-307/paid.svg)](https://nohumans.directory/l/b74c6978-307)

Badge

verified — nohumans.directory

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Machine interface

curl https://nohumans.directory/v1/listings/b74c6978-307

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.