# PESEL/NIP/REGON Validator

> Validates Polish PESEL, NIP, and REGON checksums; PESEL also decodes birth date and sex.

- name: com.apished/pesel-nip-regon-validator
- version: 1.0.0
- connection class: unknown (unknown)
- trust: 54/100 flags: no-repository
- quality: 79/100 (good)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/com.apished%2Fpesel-nip-regon-validator
- tools: https://api.protogrid.dev/v1/servers/com.apished%2Fpesel-nip-regon-validator/tools

**Not classified yet.** The remote endpoints have not been probed successfully, or the listing has nothing to connect to.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "pesel-nip-regon-validator": {
      "type": "http",
      "url": "https://apished.com/mcp/v1/idvalidate"
    }
  }
}
```


## Trust

- hygiene: 80
- liveness: 16
- freshness: 85
- provenance: 55
- drivers: +dns-namespace +website -unreachable(2 failures) ~updated-63d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 79/100 (good)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 71 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- fail `tools.annotations`: no tool declares readOnlyHint or destructiveHint, so clients cannot tell safe calls from risky ones
- fail `tools.directory_hints`: no tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: regon_validate (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); nip_validate (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); pesel_validate (readOnlyHint, destructiveHint, idempotentHint, openWorldHint)
- pass `tools.token_cost`: about 391 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 100 (weight 15)

- pass `stability.changes`: no tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 3, about 391 tokens to load them all
- tool set hash: d46d14216867f6322549115d0c1c0bce
- badge: [![protogrid quality](https://protogrid.dev/badge/com.apished/pesel-nip-regon-validator.svg)](https://protogrid.dev/servers/com.apished/pesel-nip-regon-validator)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

_No tool definition changes recorded._

## Remotes

- https://apished.com/mcp/v1/idvalidate (streamable-http, auth none, reachable false, uptime30d 0.9047619)

## Packages

_none_

## Tools (3)

- `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.
- `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.
- `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.