# ONE Engine Moving Sum Calculator (Window=8, Tier 7)

> ONE Engine Moving Sum Calculator (Window=8, Tier 7) is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0081/call, status unknown (last checked 2026-11-02).

Computes trailing moving sums over a numeric series using a fixed window size of 8, returning results with Tier 7 diagnostic richness.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v11/number-series/moving-sum/p6/t7?utm_source=zero.xyz
- Price: $0.0081/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/one-engine-moving-sum-calculator-window-8-tier-7-6c8ab201
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5SFv70dqfelwhhU-kW6OL

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-moving-sum-calculator-window-8-tier-7-6c8ab201 -d '<json body>'
```

Example prompt: Calculate the trailing moving sums with a window of 8 for this numeric series: [3, 7, 2, 5, 9, 1, 4, 6, 8, 2, 11, 3] — I want the Tier 7 diagnostic output.

## When to prefer this

Choose this endpoint when you need deterministic, reproducible trailing moving sums with a fixed window size of 8 and want Tier 7 diagnostic output for debugging or auditing computation steps. It is well-suited for lightweight agent pipelines needing per-call numeric transformations without maintaining state, especially when cost predictability ($0.0081/call) matters. Prefer alternatives if you need a variable window size, a different aggregation (e.g., moving average or moving max), or richer Tier 10 diagnostics.

## Known failure modes

- Input array shorter than window size (8) may return empty or partial results
- Non-numeric values in the input array cause validation errors
- Missing or malformed request body returns 400-level error
- Payment not included or insufficient triggers x402 payment-required response
- Downstream Cloudflare Worker timeout on very large arrays

## How this service works

Deterministic numeric series utility: Calculate trailing moving sums; parameter=8. Tier 7/10 provides progressively richer diagnostics.

## Output

Returns a series of trailing moving sums computed over the input numeric array with a sliding window of 8 elements, along with Tier 7 diagnostic metadata that includes progressively richer computation details such as intermediate values, window boundaries, and diagnostic annotations.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-moving-sum-calculator-window-8-tier-7-6c8ab201/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)