x402 Format Checker: pl-nip
https://validate.crewofthecaptain.com/api/validate/pl-nipOverview
Polish NIP tax id: 10 digits + weighted mod-11 checksum. Only $0.001 (0.1 cent) per check, paid via x402 in USDC on Base. POST JSON {"value": "..."}; values are never stored.
Protocol
x402 (POST)
Price
$0.0010
Payment Asset
USDC
Payment Network
Base
Category
verification
Provider
Crew of the Captain
Source
self-registered
Indexed
2026-10-11 15:47:32
Health
Status
healthy
Latency (p50)
823ms
Uptime (30d)
100.0%
Reliability Score
90/100
Last Checked
2026-10-22 07:53:21
Last Healthy
2026-10-22 07:53:21
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
Valid
Asset Verified
Known USDC
Facilitator
—
Recent Health Checks
| Time | Status | HTTP | Latency | Error |
|---|---|---|---|---|
| 2026-10-22 07:53:21 | healthy | 402 | 823ms | |
| 2026-10-21 19:25:04 | healthy | 402 | 1383ms | |
| 2026-10-21 06:03:44 | healthy | 402 | 699ms | |
| 2026-10-20 19:11:06 | healthy | 402 | 603ms | |
| 2026-10-20 03:50:26 | healthy | 402 | 527ms | |
| 2026-10-19 19:21:31 | healthy | 402 | 1419ms |