# ONE Engine Number Scale Factor 0.5 (Tier 1)

> ONE Engine Number Scale Factor 0.5 (Tier 1) is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0008/call, status unknown (last checked 2026-10-25).

Multiplies all numeric values in a payload by 0.5 (halves them), with Tier 1 richer diagnostic output, via a pay-per-call x402 API.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v6/number-scale/factor-0_5/t1?utm_source=zero.xyz
- Price: $0.0008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-25
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/one-engine-number-scale-factor-0-5-tier-1-6499842b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1VmCGwnaEgwGvAeAdnEHU

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-scale-factor-0-5-tier-1-6499842b -d '<json body>'
```

Example prompt: Halve this number for me — take 48.6 and multiply it by 0.5 using the ONE Engine number scaling API, and give me back the result with full diagnostics.

## When to prefer this

Choose this endpoint when you need a deterministic, auditable, pay-per-call microservice to halve numeric values — especially in autonomous agent workflows where you want diagnostic output (Tier 1) confirming the computation. Ideal when you need a verifiable external computation step rather than doing arithmetic inline, or when your workflow already uses x402 micropayment infrastructure on Base.

## Known failure modes

- Non-numeric input causes validation error or unexpected result
- Missing or malformed request body returns 4xx error
- Payment not attached or insufficient funds results in 402 Payment Required
- Rate limiting or quota exceeded returns 429
- Network timeout if worker is cold-starting

## How this service works

Multiply numeric values by 0.5. Tier 1/10 adds richer diagnostics.

## Output

Returns the input numeric value(s) multiplied by 0.5 (i.e., halved), along with Tier 1 richer diagnostic metadata about the computation such as input echo, applied factor, tier level, and processing details.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-number-scale-factor-0-5-tier-1-6499842b/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)