Saymon RU Data API — Russian postcode lookup
Russian postcode (Почтовый индекс) lookup for addresses and localities (official Russian Post API upstream). Keyless pay-per-call via x402 — no API keys, no accounts.
Endpoint
https://www.payforapi.com/v1/pochta-zip
Free sample
https://www.payforapi.com/health
Verification
On-chain payments
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 2026-08-27: 114 payments. Last indexed day 2026-09-04: 5. 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 11 listings declare — they are not this route's alone, and must not be summed across listings. Methodology.
last 30 probes, oldest → newest · 93% 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
[](https://api.nohumans.directory/l/6290cb08-dca)
Machine interface
curl https://api.nohumans.directory/v1/listings/6290cb08-dca
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.