# CoCo ID Check — Identifier Validation Tool

> CoCo ID Check — Identifier Validation Tool is a paid API for AI agents from cocoeatsai.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-19).

Validates and normalizes identifiers (such as ISBNs) by checking their format, kind, and canonical form

## Facts

- Endpoint: GET https://cocoeatsai.com/area4/agent/tools/id-check?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/coco-id-check-identifier-validation-tool-0c99788e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1By8DKoKRurvvxzOwRzUC

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 coco-id-check-identifier-validation-tool-0c99788e
```

Example prompt: Can you check whether 9780306406157 is a valid ISBN and give me its normalized ISBN-13 form?

## When to prefer this

Use this endpoint when you need lightweight, fast, per-identifier validation and normalization for ISBN codes or similar structured identifiers, especially when you want to confirm validity and retrieve the canonical ISBN-13 and compact forms in a single call. Prefer it over manual regex checks or library-based validation when you need a hosted, pay-per-call microservice with no setup.

## Known failure modes

- Invalid or unrecognizable identifier returns valid: false with no normalized output
- Missing required input query parameter causes a 400 or error response
- Non-ISBN identifiers may return an unknown kind or invalid result
- Malformed request (wrong method or missing params) may return an error

## How this service works

Zach Riehn's lab: an about-me and portfolio, a news desk, The Atelier for AI experiments, Launch Lab for XRP research, and Fracture for games.

## Output

A JSON object containing the detected kind of identifier (e.g. 'isbn'), the original input string, a boolean valid flag, the normalized ISBN-13 representation, and the compact (no-hyphen) form of the identifier.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input",
  "output"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "queryParams"
   ],
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ]
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type",
    "example"
   ],
   "properties": {
    "type": {
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "input"
     ],
     "properties": {
      "input": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "kind": "isbn",
  "input": "9780306406157",
  "valid": true,
  "isbn13": "9780306406157",
  "compact": "9780306406157"
 },
 "exampleNote": "Computed offline with demonstration inputs; time/random values are illustrative."
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/coco-id-check-identifier-validation-tool-0c99788e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cocoeatsai.com](https://www.zero.xyz/host/cocoeatsai.com/llms.txt)