# ONE Engine Text Hashtag Extractor

> ONE Engine Text Hashtag Extractor is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0005/call, status unknown (last checked 2026-10-02).

Extracts relevant hashtags from a given text string of up to 50,000 characters.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/text-token/hashtags/t1?utm_source=zero.xyz
- Price: $0.0005/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-cf954be4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VEczE-2mzhuB3zZeaU92b

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-cf954be4 -d '<json body>'
```

Example prompt: Can you pull out the best hashtags from this text I wrote for my Instagram post: 'Just finished a sunrise hike through the Cascades — the views were unreal, can't wait to go back this fall!'?

## When to prefer this

Choose this endpoint when you need fast, low-cost hashtag extraction from arbitrary text at scale, especially in agentic pipelines where cost-per-call matters. Ideal for automating social media tagging, content enrichment, or SEO workflows where you need hashtags derived directly from source text rather than user-supplied keywords. Its pay-per-call x402 pricing on Base makes it suitable for high-volume or sporadic usage without subscription overhead.

## Known failure modes

- Text exceeds 50,000 character limit — request rejected or truncated
- Empty or whitespace-only text input returns no hashtags
- Payment failure via x402 protocol results in 402 response and no content returned
- Ambiguous or very short text may yield few or low-quality hashtags
- Network timeout on Cloudflare Workers edge node

## How this service works

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

## Output

Returns an object containing extracted hashtags derived from the input text, suitable for use in social media posts, content tagging, or SEO labeling. The exact response structure may include arrays of hashtag strings or scored tag suggestions.

## 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-cf954be4/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)