# ONE Engine Hashtag Extractor

> ONE Engine Hashtag Extractor is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0015/call, status unknown (last checked 2026-10-02).

Extracts all hashtags from a given text string, returning them as a structured list

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/text-extract/hashtags/t4?utm_source=zero.xyz
- Price: $0.0015/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-hashtag-extractor-5f22e5e2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4gojBUiHwryoyKUfoPMFV

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-hashtag-extractor-5f22e5e2 -d '<json body>'
```

Example prompt: Pull all the hashtags out of this Instagram caption for me: 'Loving the golden hour vibes today 🌅 #sunset #photography #travel #goldenHour #nature #landscapephotography.'

## When to prefer this

Choose this endpoint when you need a lightweight, cheap ($0.0015 USDC), pay-per-call extraction of hashtags from text without spinning up your own regex or NLP pipeline. Ideal for autonomous agents that process social media content at scale and need a reliable microservice for hashtag parsing. Not suitable for full social media analytics, sentiment analysis, or mention extraction.

## Known failure modes

- Text exceeds 50,000 character limit — request rejected
- Empty text input — may return empty hashtag list or error
- Text with no hashtags — returns empty list
- Malformed JSON body — 400 error
- Payment not provided or insufficient — 402 Payment Required via x402 protocol

## How this service works

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

## Output

A structured object containing the list of hashtags found within the input text, extracted and returned as discrete tokens (e.g. ['#sunset', '#travel', '#photography']). The response schema is open (additionalProperties: true), so the exact field names may vary.

## 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-hashtag-extractor-5f22e5e2/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)