# ONE Engine Deterministic Text Segmentation – Return Last Words (param=2, tier=7)

> ONE Engine Deterministic Text Segmentation – Return Last Words (param=2, tier=7) is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0027/call, status unknown (last checked 2026-10-19).

Extracts the last 2 words from a text input with tier-7 diagnostic enrichment, returning a deterministic segmented tail slice.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v11/text-segment/tail-words/p2/t7?utm_source=zero.xyz
- Price: $0.0027/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/one-engine-deterministic-text-segmentation-return-last-words-param-2-b550d228
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wKdA_zwakVVlB-3enxp_Q

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-deterministic-text-segmentation-return-last-words-param-2-b550d228 -d '<json body>'
```

Example prompt: Take this sentence — 'The quick brown fox jumped over the lazy dog' — and extract just the last 2 words using the deterministic word-tail segmentation endpoint with tier-7 diagnostics.

## When to prefer this

Choose this endpoint when you need a cheap, deterministic, pay-per-call utility to reliably extract the last 2 words from a text string and want richer tier-7 diagnostic metadata alongside the result. Ideal for autonomous agent pipelines that need lightweight, reproducible text tail extraction without spinning up a full NLP service.

## Known failure modes

- Empty or missing input text returns an error or empty result
- Input with fewer than 2 words may return all available words or an error
- Malformed POST body (non-string input) causes a 400-level error
- Payment failure via x402 returns a 402 Payment Required response
- Network timeouts on the workers.dev edge may cause transient 5xx errors

## How this service works

Deterministic text segmentation utility: Return last words; parameter=2. Tier 7/10 provides progressively richer diagnostics.

## Output

Returns the last 2 words extracted from the input text, along with tier-7 progressive diagnostics that include richer segmentation metadata such as character offsets, word boundaries, and processing details about the extraction.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-deterministic-text-segmentation-return-last-words-param-2-b550d228/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)