# farsi-tools Iranian Postal Code Validator

> farsi-tools Iranian Postal Code Validator is a paid API for AI agents from farsi-tools.johnaio281.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-31).

Validates a 10-digit Iranian postal code and returns whether it is valid along with its associated region/province

## Facts

- Endpoint: GET https://farsi-tools.johnaio281.workers.dev/api/fa/validate-postal-code?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/farsi-tools-iranian-postal-code-validator-d0ccfc99
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_n-My25Cdxfui29zvc4mPy

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 farsi-tools-iranian-postal-code-validator-d0ccfc99
```

Example prompt: Can you check if the Iranian postal code 1234567891 is valid and tell me what region it belongs to?

## When to prefer this

Use this endpoint when you need to validate Iranian (Persian) postal codes specifically, including resolving the associated geographic region. It is purpose-built for Iranian address data workflows, supports pay-per-call with no API key or signup required, and returns results in Persian script alongside a boolean validity flag — making it ideal for agent pipelines handling Iranian user data.

## Known failure modes

- Missing or malformed 'value' query parameter returns an error
- Postal code that is not exactly 10 digits is flagged as invalid
- Non-numeric characters in postal code cause validation failure
- Valid-format but non-existent postal code area returns valid: false
- Payment failure (402) if USDC balance is insufficient on Base network

## How this service works

Persian (Farsi) and Iranian utility API for AI agents. Text normalization, transliteration, Jalali (Solar Hijri) calendar conversion, Persian digits and number-to-words, Iranian national ID / Sheba (IBAN) / mobile / landline / postal code / bank card (Luhn PAN) / company ID / economic code validators, Iranian provinces and cities, official Jalali holidays, Rial-Toman conversion. Also a FIXED-PRICE deliverable SKU: Persian/Arabic data cleanup at $0.90, $9 or $25 flat per file (not per call) - upload a CSV, TSV or text file and get it back normalized, with an optional Latin transliteration column. Pay per request in USDC on Base via x402 - no signup, no API key, no KYC.

## Output

A JSON object with a boolean 'valid' field indicating whether the postal code is a legitimate 10-digit Iranian postal code, and a 'region' field containing the associated Iranian province or region name in Persian (e.g. تهران) if valid.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "value"
     ],
     "properties": {
      "value": {
       "type": "string",
       "description": "10-digit postal code"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "valid": true,
  "region": "تهران"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/farsi-tools-iranian-postal-code-validator-d0ccfc99/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from farsi-tools.johnaio281.workers.dev](https://www.zero.xyz/host/farsi-tools.johnaio281.workers.dev/llms.txt)