# ONE Engine Word Bigram Extractor

> ONE Engine Word Bigram Extractor is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0065/call, status unknown (last checked 2026-10-02).

Extracts all consecutive word bigrams (two-word pairs) from a given text string up to 50,000 characters.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/text-token/word-bigrams/t7?utm_source=zero.xyz
- Price: $0.0065/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-word-bigram-extractor-d3c267da
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xaLhigZrgROFns5RVtDYG

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-word-bigram-extractor-d3c267da -d '<json body>'
```

Example prompt: Extract all word bigrams from this text: 'The quick brown fox jumps over the lazy dog. The dog barked loudly.'

## When to prefer this

Choose this endpoint when you need a lightweight, pay-per-call bigram extraction utility without spinning up your own NLP infrastructure. Ideal for agents running NLP preprocessing pipelines, keyword analysis, or document similarity tasks at low cost ($0.0065 USDC per call) on Base via x402. Best for texts under 50,000 characters where you need raw bigram output fast.

## Known failure modes

- Text exceeds 50,000 character limit — request rejected or truncated
- Empty or missing 'text' field — validation error returned
- Payment not authorized via x402/Base — 402 Payment Required response
- Malformed JSON body — 400 Bad Request
- Service unavailable or rate-limited — 5xx error

## How this service works

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

## Output

Returns an object containing the extracted word bigrams from the input text, likely as an array or map of consecutive two-word token pairs derived from the input string.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "text"
 ],
 "properties": {
  "text": {
   "type": "string",
   "description": "Text up to 50000 characters"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "additionalProperties": true
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-word-bigram-extractor-d3c267da/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)