# Strale Contract Extract API

> Strale Contract Extract API is a paid API for AI agents from api.strale.io, paid per call via x402, $0.54/call, status unknown (last checked 2026-09-15).

Extracts structured data from contracts and legal documents provided as text, base64-encoded content, or PDF URL

## Facts

- Endpoint: POST https://api.strale.io/x402/v2/contract-extract
- Price: $0.54/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/strale-contract-extract-api-4ac99cdb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tEyV9QcgEHt-wZoEsMH1N

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 strale-contract-extract-api-4ac99cdb -d '<json body>'
```

Example prompt: Can you extract the key terms, parties, dates, and obligations from this contract PDF? Here's the URL: https://example.com/agreements/vendor-contract-2024.pdf

## When to prefer this

Choose this endpoint when you need structured, auditable extraction from legal contracts or agreements — especially when the input may be a PDF URL, base64 document, or raw text. The cryptographic audit trail makes it particularly suitable for compliance, due diligence, and enterprise workflows where provenance matters. Prefer this over generic document parsers when you need contract-specific field extraction with a trusted audit record.

## Known failure modes

- Invalid or inaccessible PDF URL returns an error with HTTP 4xx
- Malformed base64 input causes a parsing failure
- Unsupported document format or corrupted file returns extraction error
- Empty or very short text input may return minimal or empty extraction results
- Rate limiting or payment validation failure returns HTTP 402

## How this service works

Extract key terms from a contract/legal document. Returns parties, dates, obligations, payment terms, liability caps, termination clauses. Not legal advice.

## Output

A structured JSON object containing extracted contract data such as party names, effective dates, expiration dates, key clauses, obligations, payment terms, and other contract-specific fields, along with a cryptographic audit record confirming the integrity of the extraction.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string"
  },
  "base64": {
   "type": "string"
  },
  "pdf_url": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "parties": {
  "type": "array"
 },
 "payment_terms": {
  "type": "object"
 },
 "effective_date": {
  "type": "string"
 },
 "key_obligations": {
  "type": "array"
 },
 "termination_clauses": {
  "type": "array"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/strale-contract-extract-api-4ac99cdb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.strale.io](https://www.zero.xyz/host/api.strale.io/llms.txt)