# IMEI Luhn Check Digit Validator

> IMEI Luhn Check Digit Validator is a paid API for AI agents from checkdigit.openverbs.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Validates a 15-digit mobile device IMEI number by verifying its Luhn (mod-10) check digit.

## Facts

- Endpoint: POST https://checkdigit.openverbs.com/v1/imei
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/imei-luhn-check-digit-validator-e1026f97
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fksJipWluf--NMUBuuZSb

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 imei-luhn-check-digit-validator-e1026f97 -d '<json body>'
```

Example prompt: Can you check if this IMEI number is valid: 490154203237518?

## When to prefer this

Use this endpoint when you specifically need to validate a 15-digit mobile device IMEI number by its Luhn check digit. It handles spaces and hyphens automatically, making it ideal for user-submitted or formatted IMEI strings. Prefer this over a generic Luhn validator when the domain context is mobile devices and you want IMEI-specific validation semantics.

## Known failure modes

- IMEI string is empty or missing — returns validation error
- IMEI is fewer or more than 15 digits (after stripping spaces/hyphens) — fails validation
- Non-numeric characters other than spaces/hyphens submitted — may return error
- Network or payment (x402) failure prevents the call from completing

## How this service works

Validate a 15-digit mobile device IMEI by its Luhn check digit. Spaces and hyphens are ignored.

## Output

A boolean or structured response indicating whether the submitted IMEI passes the Luhn (mod-10) check digit test, confirming the number is mathematically well-formed as a 15-digit IMEI.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "enum": [
      "POST"
     ]
    },
    "bodyType": {
     "type": "string",
     "enum": [
      "json",
      "form-data",
      "text"
     ]
    },
    "body": {
     "type": "object",
     "properties": {
      "imei": {
       "type": "string",
       "minLength": 1,
       "maxLength": 32,
       "description": "15-digit IMEI (spaces/hyphens allowed)."
      }
     },
     "required": [
      "imei"
     ],
     "additionalProperties": false
    }
   },
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "additionalProperties": false
  }
 },
 "required": [
  "input"
 ]
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/imei-luhn-check-digit-validator-e1026f97/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from checkdigit.openverbs.com](https://www.zero.xyz/host/checkdigit.openverbs.com/llms.txt)