# ONE Engine Number Max

> ONE Engine Number Max is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0009/call, status unknown (last checked 2026-10-02).

Returns the maximum of two numbers via a pay-per-call API using x402 on Base.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v1/number/max?utm_source=zero.xyz
- Price: $0.0009/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/one-engine-number-max-9ad82f1b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sm7SgZS-T_ZqqRVkjygqm

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 one-engine-number-max-9ad82f1b -d '<json body>'
```

Example prompt: What's the maximum of 47 and 83? Use the ONE Engine number comparison to find out.

## When to prefer this

Choose this endpoint when you need a lightweight, cheap ($0.0009 USDC), pay-per-call maximum computation for two numbers inside an autonomous agent workflow on Base, especially when you want to avoid spinning up local compute or when the x402 payment protocol is already integrated.

## Known failure modes

- Missing or non-numeric input for 'a' or 'b' may result in an error or unexpected result
- Payment failure via x402 if insufficient USDC balance on Base
- Rate limiting or service unavailability from the Cloudflare Worker

## How this service works

Low-cost pay-per-call utility APIs for autonomous agents using x402 on Base.

## Output

Returns a JSON object with a single field 'value' containing the maximum of the two input numbers, e.g. {"value": 10}.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "a": {
   "type": "number"
  },
  "b": {
   "type": "number"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "value": 10
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-number-max-9ad82f1b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from one-search.one-engine.workers.dev](https://www.zero.xyz/host/one-search.one-engine.workers.dev/llms.txt)