# Toll402 PESEL Validator

> Toll402 PESEL Validator is a paid API for AI agents from toll402.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-20).

Offline validation of Polish PESEL national identification numbers, verifying format, checksum, and encoded metadata

## Facts

- Endpoint: POST https://toll402.dev/v1/t/pesel_validate?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/toll402-pesel-validator-34d29720
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YWY5muWssZGmNBUsILFBo

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability toll402-pesel-validator-34d29720 -d '<json body>'
```

Example prompt: Can you check if this Polish PESEL number is valid: 44051401458?

## When to prefer this

Use this endpoint when you need a fast, offline, per-call PESEL validation without setting up any API keys or accounts. Ideal for AI agents doing on-the-fly KYC checks, form validation, or data quality audits on Polish national ID numbers. Prefer this over building your own checksum logic when you want a verified, maintained implementation accessible via a simple HTTP call paid in USDC.

## Known failure modes

- Invalid or malformed PESEL (wrong length, non-numeric characters, failed checksum) returns ok: false
- Missing required 'pesel' field in request body causes validation error
- Non-string input type may cause schema validation failure
- Payment failure via x402 returns HTTP 402 before processing

## How this service works

The OpenRouter for AI-agent tools: one gateway, one wallet, every capability. Built-in tools, forged tools, a global verified business directory and 2,000+ aggregated x402 services, all paid per call in USDC via x402 (HTTP 402). No signup, no API key.

## Output

Returns a JSON object with an 'ok' boolean field indicating whether the PESEL number is valid. May include additional parsed metadata such as date of birth or gender encoded in the PESEL structure.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [
      "pesel"
     ],
     "properties": {
      "pesel": {
       "type": "string",
       "description": "11-digit PESEL number, digits only (spaces allowed)"
      }
     },
     "additionalProperties": false
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/toll402-pesel-validator-34d29720/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from toll402.dev](https://www.zero.xyz/host/toll402.dev/llms.txt)