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Maxwell x402 USPTO Patent Search
x402
Maxwell x402 USPTO Patent Search is a paid API for AI agents from api.maxwellinternational.ai, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-01).
Search US patents by keyword (up to 10 recent USPTO applications/grants) or fetch a single patent by number, returning title, assignee, inventors, dates, status, and CPC classes.
Price / call$0.005
Success—
StatusUnknown
How this service works
US patent search by keywords (?q=, every word must match; up to 10 USPTO applications and grants, newest filing first) or one patent by number (?patentNumber=US11000000). Each result: title, assignee, inventors, CPC classes, filing and grant dates, USPTO status, and patentNumber for granted patents or applicationNumber for pending applications. Uncached: 404, not charged.
Output
Returns a JSON object (or array for keyword search) with patent number, title, assignee, inventors, filing date, grant date, granted boolean, USPTO status string, and CPC classification codes. Keyword search returns up to 10 recent matching USPTO applications and grants.
Example use cases
Competitive patent landscape research
“Search USPTO patents about 'cardiac stent delivery system' and show me the most recent applications and grants — I want to know who the assignees are and what CPC classes keep showing up.”
Verify a specific patent grant
“Can you pull up patent US10500000 for me? I need to confirm it's actually been granted, who the assignee is, and what the filing and grant dates are.”
IP due diligence for a startup
“Find recent USPTO patents related to 'federated machine learning privacy' — I need the titles, assignees, and filing dates to understand the competitive IP landscape before we close this investment.”
Technical details
Endpoint
GEThttps://api.maxwellinternational.ai/v1/uspto/patent?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need structured USPTO patent metadata — title, assignee, inventors, dates, status, and CPC codes — for a specific patent number or a keyword-based search of recent filings. Prefer this over raw USPTO search when you need a simple, pay-per-call API with clean JSON output and no authentication setup. Not suitable for bulk patent mining, full-text patent content, or historical patent corpora beyond recent filings.
Side effects
- Patent number not found — returns empty or error response
- Keyword query returns no results if no recent USPTO filings match
- Malformed patent number format may cause lookup failure
- Rate limiting or payment failure (x402) if USDC payment not processed
- Keyword search limited to recent patents; older patents may not appear
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"cpc": [
"A61F 2/243"
],
"title": "REPOSITIONING WIRES AND METHODS FOR REPOSITIONING PROSTHETIC HEART VALVE DEVI...",
"status": "Patented Case",
"granted": true,
"assignee": "4C MEDICAL TECHNOLOGIES, INC.",
"grantDate": "2021-05-11",
"filingDate": "2019-09-12",
"patentNumber": "US11000000"
}
}Tags
x402
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