# 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 block of text up to 50,000 characters.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/text-token/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-10-0f6607bb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8GsuyB5HMvsiDP_1guMEt

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-10-0f6607bb -d '<json body>'
```

Example prompt: Look at this blog post draft and tell me the top 10 hashtags I should use when sharing it on social media: [paste text here].

## When to prefer this

Choose this endpoint when you need a quick, low-cost ($0.03 USDC) automated extraction of exactly the top 10 hashtags from a text body, especially in autonomous agent pipelines where pay-per-call x402 billing on Base is already configured. Prefer this over manual hashtag research or LLM prompting when you want a deterministic ranked list without custom prompt engineering.

## Known failure modes

- Text exceeds 50,000 character limit — request rejected or truncated
- Empty or very short text — may return fewer than 10 hashtags or low-quality results
- Payment failure via x402 — 402 response if USDC funds are insufficient
- Non-English or mixed-language text — hashtag quality may degrade
- Highly technical or niche text — hashtags may be generic rather than domain-specific

## How this service works

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

## Output

Returns a JSON object containing the top 10 hashtags extracted and ranked by relevance from the provided text, suitable for use in social media posts or content tagging.

## 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-10-0f6607bb/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)