# ONE Engine ISO Date Extractor

> ONE Engine ISO Date Extractor is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).

Extracts ISO-formatted dates from freeform text using a pay-per-call API secured by x402 micropayments on Base.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/text-extract/iso-dates/t8?utm_source=zero.xyz
- Price: $0.01/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-iso-date-extractor-f20b9da4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KOh-1rLOWpP_I_Z31myKW

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-iso-date-extractor-f20b9da4 -d '<json body>'
```

Example prompt: Can you pull out all the ISO-formatted dates from this contract text: 'The lease begins March 3rd, 2025 and expires on the 28th of February, 2027, with a renewal option by December 1, 2026.'

## When to prefer this

Choose this endpoint when you need to extract and normalize date expressions from unstructured or semi-structured text into ISO 8601 format, especially in agentic pipelines that process documents, emails, contracts, or notes. It is ideal for lightweight, pay-per-call use cases where you don't want to pay for a full NLP subscription service. At $0.01 USDC per call, it suits high-volume or on-demand document pipelines on Base.

## Known failure modes

- Text exceeds 50,000 character limit — request rejected
- No dates found in text — returns empty array or empty result
- Ambiguous dates (e.g. '01/02/03') may be misinterpreted or omitted
- Payment failure via x402 — 402 response returned before processing
- Malformed request body missing required 'text' field — 400 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 ISO-formatted dates extracted from the input text, likely as an array of date strings (e.g. YYYY-MM-DD) identified from natural language or mixed-format date expressions in the input.

## 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-iso-date-extractor-f20b9da4/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)