# Sindri Checksum Identifier Generator

> Sindri Checksum Identifier Generator is a paid API for AI agents from ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).

Generates structurally valid checksummed identifiers (ISBN, UPC, VIN, IMEI) using each format's real check-digit algorithm

## Facts

- Endpoint: POST https://ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/generateChecksumFormat?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sindri-checksum-identifier-generator-168a85c3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_e2tg0UVjzv11fNnwxMhWL

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 sindri-checksum-identifier-generator-168a85c3 -d '<json body>'
```

Example prompt: Generate a valid ISBN-13 for me — I need a structurally correct one with a proper check digit for testing my book catalog system.

## When to prefer this

Choose this endpoint when you need test or dummy identifiers that are structurally valid and pass checksum validation — not just random numbers. Ideal for seeding test databases, mocking APIs, or generating realistic sample data. Unlike random number generators, this endpoint applies the real check-digit algorithm so the output passes format validation.

## Known failure modes

- Invalid field value (not isbn/upc/vin/imei) returns an error
- Passing args to vin or imei (which accept no arguments) may return an error
- Invalid locale format may produce unexpected results
- Network timeout from Lambda cold start

## How this service works

Checksummed-identifier-format generator API. Generates a structurally valid isbn, upc, vin, or imei, each computed with its real check-digit algorithm. vin and imei take no arguments. Accepts optional locale (default en_US).

## Output

Returns a structurally valid, checksummed identifier string for the requested format (ISBN, UPC, VIN, or IMEI), computed using each format's authentic check-digit algorithm. The generated value passes real validation checks for its respective format.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "args": {
   "type": "object",
   "description": "Method-specific options, e.g. {\"variant\":13} for isbn. Not accepted for vin/imei."
  },
  "field": {
   "enum": [
    "isbn",
    "upc",
    "vin",
    "imei"
   ],
   "type": "string",
   "description": "Which checksummed identifier format to generate."
  },
  "locale": {
   "type": "string",
   "default": "en_US",
   "description": "Locale code, e.g. \"en_US\", \"de\"."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sindri-checksum-identifier-generator-168a85c3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws](https://www.zero.xyz/host/ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/llms.txt)