# ONE Engine Hashtag Extractor (t5)

> ONE Engine Hashtag Extractor (t5) is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0025/call, status unknown (last checked 2026-10-02).

Extracts hashtags from a given block of text up to 50,000 characters using a pay-per-call x402 API on Base.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/text-extract/hashtags/t5?utm_source=zero.xyz
- Price: $0.0025/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-t5-fd87efee
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vK_dl5auqSUBEeX0dYdr0

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-t5-fd87efee -d '<json body>'
```

Example prompt: Can you pull out all the hashtags from this Instagram caption for me: 'Loving this golden hour shot! #photography #sunset #goldenHour #travel #nature #mood'?

## When to prefer this

Choose this endpoint when you need a cheap, lightweight, pay-per-call service to extract hashtags from arbitrary text without needing a full NLP platform or managing API keys — especially when operating in an autonomous agent context on Base using x402 micropayments.

## Known failure modes

- Text exceeds 50,000 character limit — request rejected
- Payment not included or insufficient USDC — 402 Payment Required response
- Empty or missing 'text' field — 400 Bad Request
- No hashtags found in text — returns empty list
- Malformed JSON body — parsing error

## 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 hashtags extracted from the input text, likely as an array of hashtag strings found within the provided content.

## 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-t5-fd87efee/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)