# x402stock USPTO Patent Lookup by Application Number

> x402stock USPTO Patent Lookup by Application Number is a paid API for AI agents from x402stock.xyz, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-22).

Retrieves full USPTO patent record details for a given patent application number, including title, status, inventors, dates, and classification codes

## Facts

- Endpoint: GET https://x402stock.xyz/api/v1/patent/%7Bapplication%7D?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402stock-uspto-patent-lookup-by-application-number-251e1478
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Zi2z-_lPxIgb32sI2dIwE

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 x402stock-uspto-patent-lookup-by-application-number-251e1478
```

Example prompt: Look up the USPTO patent application number 18687455 and tell me the title, current status, grant date, inventors, and CPC classification codes.

## When to prefer this

Use this endpoint when you need structured, machine-readable USPTO patent data for a specific application number without requiring an API key or account setup. Ideal for AI agents that need to programmatically retrieve patent status, inventor information, or classification codes on a pay-per-call basis using USDC via x402 on Base.

## Known failure modes

- Invalid or malformed application number returns an error or empty result
- Application number not found in USPTO database returns a 404 or empty patent object
- Unpublished or sealed applications may return no data
- Payment failure via x402/USDC prevents the request from being processed
- Rate limiting or network issues may cause timeouts

## How this service works

Pay-per-call market and economic data API for AI agents: US stocks, ETFs and options, forex, crypto and on-chain perps, energy commodities, US and global macro (Fed, CPI, jobs, GDP, Treasury, World Bank), SEC filings, congressional trades, and market sentiment. No API keys, no accounts. Pay per request in USDC via x402 on Base.

## Output

A JSON object containing the full patent record as of a given timestamp, including patent title, status, applicant, inventor list, filing date, grant date, patent number, publication number, application type, CPC classification codes, group art unit, examiner, parent count, assignment count, patent term adjustment days, a Google Patents URL, and attribution to USPTO Open Data Portal.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "as_of": "2026-06-18T12:00:00.000Z",
  "patent": {
   "url": "https://patents.google.com/patent/US12179682",
   "title": "BIASED BAG WRAP FOR RIMLESS STEERING WHEEL",
   "status": "Patented Case",
   "examiner": "CENTRAL, DOCKET",
   "applicant": "TESLA, INC.",
   "inventors": [
    "Kurt FISCHER",
    "Aditya MOHANTY"
   ],
   "grant_date": "2024-12-31",
   "cpc_classes": [
    "B62D 1/06",
    "B60R 21/2035"
   ],
   "filing_date": "2024-02-28",
   "parent_count": 1,
   "patent_number": "12179682",
   "group_art_unit": "3611",
   "application_type": "Utility",
   "assignment_count": 2,
   "application_number": "18687455",
   "publication_number": "US20240208565A1",
   "earliest_publication_date": "2024-06-27",
   "patent_term_adjustment_days": 0
  },
  "source": "uspto",
  "attribution": "Source: U.S. Patent and Trademark Office (USPTO) Open Data Portal",
  "application_number": "18687455"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402stock-uspto-patent-lookup-by-application-number-251e1478/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402stock.xyz](https://www.zero.xyz/host/x402stock.xyz/llms.txt)