# Open Source Filings – USPTO Patent Search

> Open Source Filings – USPTO Patent Search is a paid API for AI agents from api.osf-master-server.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Search granted US patents from the USPTO Open Data Portal by keyword, assignee, inventor, or patent number, returning structured patent metadata with provenance URLs.

## Facts

- Endpoint: GET https://api.osf-master-server.com/x402/patents/search/:query
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/open-source-filings-uspto-patent-search-528fc701
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_k8JQ7sruq-ZOIyaIsVHAm

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 open-source-filings-uspto-patent-search-528fc701
```

Example prompt: Can you search for granted US patents on solid-state battery electrolytes and show me the patent numbers, titles, assignees, and grant dates?

## When to prefer this

Use this endpoint when you need structured, provenance-stamped data from the official USPTO patent corpus — specifically for prior art searches, freedom-to-operate analysis, competitor IP monitoring, or patent portfolio lookups. Prefer this over general web search when you need authoritative, machine-readable patent records with grant dates, filing dates, USPC classifications, and official provenance links. Ideal for legal research workflows, AI agents doing IP due diligence, or systems that need to cite official USPTO sources.

## Known failure modes

- No matching patents found for the query — returns empty result set
- Overly broad keyword returns too many low-relevance results
- Misspelled assignee or inventor name yields no matches
- Query too ambiguous to retrieve meaningful results
- USPTO Open Data Portal upstream unavailability causes request failure
- Rate limiting or payment failure for $0.05 USDC per call

## How this service works

Search granted US patents from the USPTO Open Data Portal by keyword: invention title, assignee company, inventor name, patent number, or technology area. Returns patent number, title, grant date, filing date, assignee, inventors, USPC classification and a provenance URL per match. For prior art checks, freedom to operate research, competitor IP monitoring, and patent portfolio lookup.

## Output

Returns a list of matching granted US patents, each with patent number, invention title, grant date, filing date, assignee name, inventor names, USPC classification code, and a provenance URL linking back to the official USPTO record.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "query"
     ],
     "properties": {
      "query": {
       "type": "string",
       "description": "Keyword(s): invention topic, assignee company, inventor name, or patent number. E.g. 'lithium battery cathode' or 'Cytiva'."
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/open-source-filings-uspto-patent-search-528fc701/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.osf-master-server.com](https://www.zero.xyz/host/api.osf-master-server.com/llms.txt)