# ONE Engine – Return First N Numeric Fields (Tier 2)

> ONE Engine – Return First N Numeric Fields (Tier 2) is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0014/call, status unknown (last checked 2026-10-13).

Processes a JSON object and returns its first 8 numeric fields, with Tier 2 progressive diagnostics included in the response.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v11/record-process/number-fields/p6/t2?utm_source=zero.xyz
- Price: $0.0014/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/one-engine-return-first-n-numeric-fields-tier-2-f1e2a22e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GMfGFUxqfkZ8qvvObKktD

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-return-first-n-numeric-fields-tier-2-f1e2a22e -d '<json body>'
```

Example prompt: Take this JSON object and extract the first 8 numeric fields from it, including the Tier 2 diagnostics: {"id":1,"score":98.5,"age":34,"weight":72.3,"height":180,"temperature":36.6,"pressure":1013,"humidity":55,"name":"Alice","city":"NY"}.

## When to prefer this

Choose this endpoint when you need a cheap, deterministic, pay-per-call utility to extract numeric fields from a JSON object without writing custom parsing logic. Ideal for agent pipelines that need to isolate numeric data from mixed-type JSON payloads quickly, with the added benefit of Tier 2 diagnostics for debugging or auditing field selection.

## Known failure modes

- JSON body is malformed or unparseable — returns parse error
- JSON object contains fewer than 8 numeric fields — returns only those found
- Non-JSON content type submitted — returns content type error
- Empty JSON object submitted — returns empty numeric field set
- Payment not attached or insufficient — returns 402 Payment Required

## How this service works

Deterministic JSON object processing utility: Return first N numeric fields; parameter=8. Tier 2/10 provides progressively richer diagnostics.

## Output

Returns a structured response containing the names and values of the first 8 numeric fields found in the submitted JSON object, along with Tier 2 progressive diagnostic metadata about the processing operation.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-return-first-n-numeric-fields-tier-2-f1e2a22e/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)