# ONE Engine Alphanumeric Token Extractor (t4)

> ONE Engine Alphanumeric Token Extractor (t4) 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 or filters alphanumeric tokens from a given text string, returning only alphanumeric character sequences.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/text-token/alphanumeric/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-alphanumeric-token-extractor-t4-a643d9a7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qYehtoXEdExZpWaJfUxAe

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-alphanumeric-token-extractor-t4-a643d9a7 -d '<json body>'
```

Example prompt: Can you extract all the alphanumeric tokens from this raw text for me? Here's the string: 'Hello, world! Order #4521 was placed on 2024-03-15 @ 09:00am — please confirm.'

## When to prefer this

Choose this endpoint when you need a fast, low-cost ($0.0015 USDC per call) pay-per-call alphanumeric tokenizer for text up to 50,000 characters, especially when operating in an autonomous agent context on Base using x402 micropayments. Prefer it over custom regex solutions when you want a managed, scalable utility without infrastructure overhead.

## Known failure modes

- Text exceeds 50,000 character limit — request rejected
- Empty text field — may return empty token list or validation error
- Malformed JSON body — 400 error
- Payment failure via x402 on Base — 402 response with payment details
- Text containing only non-alphanumeric characters — returns empty token set

## 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 alphanumeric tokens parsed from the submitted text, with non-alphanumeric characters and sequences removed or separated.

## 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-alphanumeric-token-extractor-t4-a643d9a7/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)