risk data for machine payments
Endpoint
domain-availability-checker.underscoredone.com/check
Give this API up to 10 domain names and it tells you whether each has a registration record at the official registry. It uses RDAP, the structured replacement for WHOIS, so there is no free-text parsing. Each domain comes back as 'registered', 'unregistered', or 'indeterminate' when the registry has no RDAP for that ending. 'Unregistered' means no record was found, which usually means available - but reserved and premium names also return no record. Registration status only; no pricing.
Score
The score is built from observations we collect ourselves: how the endpoint responds, what the envelope contains, how stable the price and the recipient are, who pays and how often. It is deterministic — the same input always produces the same result.
We do not publish the exact methodology yet. If you own this endpoint, write to us and we will show you, item by item, what drags the score down.
Recent probes
| When | Code | Latency | Scheme and network | Recipient | Price | Findings |
|---|---|---|---|---|---|---|
| 2h ago | 402 | 314 ms | exact eip155:8453 |
0xE974…2F08 | 0.010000 | clean |
| 9h ago | 402 | 313 ms | exact eip155:8453 |
0xE974…2F08 | 0.010000 | clean |
| 4d ago | 402 | 179 ms | exact eip155:8453 |
0xE974…2F08 | 0.010000 | clean |
| 4d ago | 402 | 368 ms | exact eip155:8453 |
0xE974…2F08 | 0.010000 | clean |
Reference
| URL | https://domain-availability-checker.underscoredone.com/check |
| Sources | bazaar |
| Recipient per catalogue | 0xE9740820225B3918b4ddd1292C7cA4Ca0e2C2F08 |
| Price per catalogue | 0.010000 |
| Machine access | /v1/endpoint · /full · badge |
Is this your endpoint?
The score is built only from public observations. If something we recorded is wrong — say our prober hit you during maintenance — write to us. We will recheck and publish your reply next to the score.
We do not delete accurate observations. The prober makes at most one request per second per host and only asks for the payment challenge — it never pays and never takes content.