PESEL/NIP/REGON Validator
Validates Polish PESEL, NIP, and REGON checksums; PESEL also decodes birth date and sex.
| Endpoint | https://apished.com/mcp/v1/idvalidate (streamable-http) |
|---|---|
| Registry version | 1.0.0 |
| Now | 3 tools · grade B (84) · pin ts_02c3440b9d12278348bc487e68dddec7 · protocol 2025-06-18 |
| First / last listed | 2026-10-27 03:40 UTC / 2026-10-27 03:40 UTC |
| Grade over time | 2026-10-27: B (84), 3 tools |
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Tools: nip_validate pesel_validate regon_validate
nip_validate | Validates the checksum of a 10-digit Polish tax identification number (NIP). Checksum uses weights 6 5 7 2 3 4 5 6 7 over the first 9 digits; sum mod 11 must equal the 10th digit. A sum mod 11 of 10 is itself invalid. params: value* |
pesel_validate | Validates the checksum of an 11-digit Polish national identification number (PESEL). Checksum uses weights 1 3 7 9 1 3 7 9 1 3 over the first 10 digits; control digit is (10 - sum mod 10) mod 10. On success also decodes the date of birth and sex embedded in the number; a checksum-valid number with an impossible calendar date (e.g. Feb 30) is still reported invalid. params: value* |
regon_validate | Validates the checksum of a 9- or 14-digit Polish business registry number (REGON). 9-digit: weights 8 9 2 3 4 5 6 7 over the first 8 digits, sum mod 11 (10 mapped to 0) must equal the 9th digit. 14-digit: the first 9 digits must themselves be a valid 9-digit REGON, and weights 2 4 8 5 0 9 7 3 6 1 2 4 8 over the first 13 digits (sum mod 11, 10 mapped to 0) must equal the 14th digit. params: value* |
Entries describe changes in tool definitions. They are not statements about a server, its quality or its author. The grade measures how the tool definitions fit model providers (token cost, schema compatibility, confusable names) as scored by the ToolFit engine at the time of the listing. JSON: append .json. Opt-out: how or hello@youraitools.co.