# ONE Engine Number Analysis Pack Tier 4

> ONE Engine Number Analysis Pack Tier 4 is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0018/call, status unknown (last checked 2026-10-02).

Performs tier-4 numeric analysis on a given number value via a low-cost pay-per-call API using x402 on Base.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v2/number-analysis-pack/t4?utm_source=zero.xyz
- Price: $0.0018/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-analysis-pack-tier-4-9d700842
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VdJrgJlGSQ3bR5ISB04MR

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-analysis-pack-tier-4-9d700842 -d '<json body>'
```

Example prompt: Run a tier-4 number analysis on the value 42 and tell me what the result is.

## When to prefer this

Choose this endpoint when you need lightweight, low-cost numeric computation or classification at tier 4 specifically, and are operating in an autonomous agent context that supports x402 micropayments on Base. It is particularly suitable when cost-per-call efficiency matters and the input is a single numeric value.

## Known failure modes

- Missing or invalid 'value' field returns a validation error
- Non-numeric input may cause a 400 bad request
- Payment failure via x402 returns a 402 Payment Required response
- Service unavailability on Cloudflare Workers returns a 503 error

## How this service works

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

## Output

Returns a JSON object containing the tier level (4) and a tier-dependent analysis result for the submitted numeric value. The exact nature of the result depends on the tier's computation logic.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "value": {
   "type": "number"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tier": 4,
  "result": "Tier-dependent output"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-number-analysis-pack-tier-4-9d700842/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)