# ONE Engine Text Token Identifier Extraction (t1)

> ONE Engine Text Token Identifier Extraction (t1) 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 or identifies token-level identifiers from a block of text up to 50,000 characters.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/text-token/identifiers/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-token-identifier-extraction-t1-ef80c7a5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6PI26NUhL9EFUKtGtHOK_

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-token-identifier-extraction-t1-ef80c7a5 -d '<json body>'
```

Example prompt: Can you extract all identifiers and tokens from this text: 'Order #A1023 was placed by user ID 9981 referencing product SKU-7734 on account ACC-00192'?

## When to prefer this

Choose this endpoint when you need a cheap, pay-per-call solution to extract or identify token-level identifiers from text — especially in autonomous agent pipelines where cost control matters. It is well-suited for processing individual text blocks rather than batch document pipelines, and ideal when you are already operating within an x402/Base payment infrastructure.

## Known failure modes

- Text exceeds 50,000 character limit — request rejected
- Empty or missing 'text' field returns validation error
- Ambiguous or unstructured text may yield low-quality or empty identifier sets
- Payment failure via x402 if USDC balance is insufficient
- Network timeout if Cloudflare Worker is under load

## 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 extracted token-level identifiers found within the submitted text, likely including entity labels, token strings, positions, or identifier types depending on the service implementation.

## 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-token-identifier-extraction-t1-ef80c7a5/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)