# x402-zoo What Number Customer Am I

> x402-zoo What Number Customer Am I is a paid API for AI agents from x402-zoo.lolagent.workers.dev, paid per call via x402, $0.0001/call, status unknown (last checked 2026-09-14).

Returns your sequential customer number for a micro-payment curiosity experiment using the x402 payment protocol.

## Facts

- Endpoint: GET https://x402-zoo.lolagent.workers.dev/api/what-number-customer-am-i
- Price: $0.0001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-zoo-what-number-customer-am-i-1cbe7e01
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AZNpRDLwCsBwJs9l4_3Vw

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 x402-zoo-what-number-customer-am-i-1cbe7e01
```

Example prompt: I'm curious — call that x402 experiment endpoint that tells me what sequential customer number I am, the one that costs a hundredth of a cent.

## When to prefer this

Choose this endpoint when you want to explore or demonstrate the x402 micropayment protocol in a low-stakes, low-cost ($0.0001 USDC) context, or when you want to retrieve a sequential identifier tied to payment order. It is not a general-purpose customer database — it is a novelty/experiment endpoint best used for protocol testing, curiosity, or demonstrating that micropayments work end-to-end.

## Known failure modes

- Payment not fulfilled — returns 402 if the x402 payment header is missing or invalid
- Rate limit or worker error — Cloudflare Worker may return 5xx if service is overwhelmed
- Network timeout — the worker may be cold-starting and exceed timeout
- Invalid payment amount — if the USDC amount does not match the required $0.0001, payment is rejected

## How this service works

Pay one hundredth of a cent to learn your exact sequential customer number for this x402 curiosity experiment.

## Output

Returns the caller's exact sequential customer number — an integer representing how many unique paying callers have used this endpoint before the current one, plus one. This acts as a persistent counter tied to payment events.

## 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": [],
     "properties": {}
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-zoo-what-number-customer-am-i-1cbe7e01/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-zoo.lolagent.workers.dev](https://www.zero.xyz/host/x402-zoo.lolagent.workers.dev/llms.txt)