# ONE Engine Text Domain Extraction (t9)

> ONE Engine Text Domain Extraction (t9) is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.018/call, status unknown (last checked 2026-10-02).

Extracts domain names or domain-related entities from a block of text using the t9 extraction model.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/text-extract/domains/t9?utm_source=zero.xyz
- Price: $0.018/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-domain-extraction-t9-98d4cf90
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_x-7F7EVSh5V9RfZKps1CX

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-domain-extraction-t9-98d4cf90 -d '<json body>'
```

Example prompt: Go through this article text and pull out every domain name or website mentioned in it — here's the text: [paste up to 50,000 characters].

## When to prefer this

Choose this endpoint when you need to extract domain names specifically from free-form text at low cost ($0.018 USDC per call) and you are operating within an x402/Base payment infrastructure. It is well-suited for autonomous agents that need to process text programmatically and surface embedded domain references without building a custom regex or NLP pipeline. Prefer it over general-purpose NLP APIs when cost-per-call economics matter and you are already integrated with the ONE Engine x402 payment flow.

## Known failure modes

- Text exceeds 50,000 character limit — request rejected or truncated
- Empty or whitespace-only text returns no extracted domains
- Text with no domain references returns an empty or null domain list
- Malformed JSON body causes a 400-level error
- Payment failure via x402 prevents the call from completing
- Ambiguous substrings that resemble domains may produce false positives

## How this service works

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

## Output

A JSON object containing the domains or domain-related entities extracted from the input text. The exact structure is open (additionalProperties: true), but callers should expect one or more fields listing detected domain names or grouped domain data found within the submitted text.

## 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-domain-extraction-t9-98d4cf90/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)