# ONE Engine Text Hashtag Extractor (Top 10)

> ONE Engine Text Hashtag Extractor (Top 10) is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-02).

Extracts the top 10 most relevant hashtags from a given text input, up to 50,000 characters.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/text-extract/hashtags/t10?utm_source=zero.xyz
- Price: $0.03/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-text-hashtag-extractor-top-10-f6764104
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cmMvV8Lf65VHh7ro3EA97

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-text-hashtag-extractor-top-10-f6764104 -d '<json body>'
```

Example prompt: Extract the top 10 hashtags from this article text: 'Artificial intelligence is transforming healthcare with new diagnostic tools, helping doctors detect diseases earlier and improve patient outcomes across global hospital networks.'

## When to prefer this

Choose this endpoint when you need a quick, low-cost ($0.03 USDC) extraction of the top 10 ranked hashtags from a text block of up to 50,000 characters, especially in autonomous agent pipelines that use x402 micropayment rails on Base. Ideal when you want a fixed-size top-10 hashtag set rather than an open-ended or configurable count.

## Known failure modes

- Text exceeds 50,000 character limit — request rejected or truncated
- Empty or whitespace-only text input yields no hashtags
- Payment failure via x402 on Base blockchain prevents endpoint access
- Text with no discernible topics may return fewer than 10 hashtags
- Non-English or mixed-language text may produce lower quality results

## How this service works

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

## Output

Returns a structured object containing the top 10 hashtags extracted and ranked by relevance from the submitted text. Hashtags are likely returned as an array or ranked list derived from the key themes and entities in the input.

## 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-text-hashtag-extractor-top-10-f6764104/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)