# 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 all hashtags from a given text input, returning a structured list of discovered hashtag tokens.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/text-extract/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-3b54789d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4kRlBUqSgTTJIKOnKau7k

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-3b54789d -d '<json body>'
```

Example prompt: Pull all the hashtags out of this Instagram caption for me: 'Loving the new season vibes! #autumn #fashion #OOTD #style2024 — can't believe how fast the year is going #blessed'

## When to prefer this

Choose this endpoint when you need a cheap, fast, pay-per-call hashtag extraction from raw text without setting up a full NLP pipeline. At $0.0005 USDC per call via x402 on Base, it's ideal for autonomous agents processing social media content at scale where cost-per-call matters. Prefer this over general-purpose NLP APIs when you only need hashtag extraction and want micropayment-based billing with no subscription overhead.

## Known failure modes

- Text exceeds 50,000 character limit — request rejected or truncated
- Empty text input returns empty hashtag array
- Text with no hashtags returns an empty result set
- Payment failure via x402 protocol results in 402 response and no extraction
- Malformed JSON body causes a 400 error

## 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 list of hashtags found in the submitted text, including the hashtag strings (with or without the '#' prefix depending on implementation). The response may also include counts or positions depending on the service's output format.

## 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-3b54789d/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)