# USPTO Patent Application Continuity / Family Lookup

> USPTO Patent Application Continuity / Family Lookup is a paid API for AI agents from agents.x402stock.xyz, paid per call via MPP, $0.01/call, status unknown (last checked 2026-09-14).

Returns the patent family tree for a given USPTO application number, listing parent and child applications with filing dates, status, and continuity relationship types.

## Facts

- Endpoint: GET https://agents.x402stock.xyz/api/v1/patent/{application}/continuity
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Provider: agents.x402stock.xyz
- Website: https://agents.x402stock.xyz
- Canonical page: https://www.zero.xyz/c/agents-x402stock-xyz-uspto-patent-application-continuity-family-lookup-579f8110
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TbqcNyq7SeslzoNSsIgA3

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 agents-x402stock-xyz-uspto-patent-application-continuity-family-lookup-579f8110
```

Example prompt: Can you pull up the full patent family for USPTO application number 16123456 — I want to see all the parent and child applications, their filing dates, statuses, and whether they're continuations, divisionals, or national-stage entries?

## When to prefer this

Use this endpoint when you need to map the full continuity chain of a specific USPTO patent application — its parent priority claims and child continuation, divisional, or national-stage entries. Prefer this over general patent search when you already have an application number and need structured family hierarchy data rather than text search results.

## Known failure modes

- Invalid or nonexistent application number returns empty parents/children arrays or error
- Application number format errors may cause request failure
- USPTO data may have a lag so very recent filings might not appear
- Some relationship or status fields may be null if USPTO data is incomplete

## How this service works

The patent family for one application — pass the `{application}` number. Returns parent and child applications with their numbers, filing dates, status, and the continuity relationship (continuation, divisional, national-stage entry, etc.). Maps how deep a company's protection on an invention runs. Source: USPTO. From x402stock, a market & economic data API (x402, USDC).

## Output

A JSON object containing the queried application number, a timestamp, the data source (USPTO), an array of parent applications (each with application number, filing date, status, and relationship type), and an array of child applications (each with application number, filing date, status, and relationship type), plus attribution text.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "application"
 ],
 "properties": {
  "application": {
   "type": "string",
   "description": "The application path parameter."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "source",
  "as_of",
  "application_number",
  "parents",
  "children",
  "attribution"
 ],
 "properties": {
  "as_of": {
   "type": "string"
  },
  "source": {
   "type": "string",
   "const": "uspto"
  },
  "parents": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "application_number",
     "filing_date",
     "status",
     "relationship"
    ],
    "properties": {
     "status": {
      "anyOf": [
       {
        "type": "string"
       },
       {
        "type": "null"
       }
      ]
     },
     "filing_date": {
      "anyOf": [
       {
        "type": "string"
       },
       {
        "type": "null"
       }
      ]
     },
     "relationship": {
      "anyOf": [
       {
        "type": "string"
       },
       {
        "type": "null"
       }
      ]
     },
     "application_number": {
      "anyOf": [
       {
        "type": "string"
       },
       {
        "type": "null"
       }
      ]
     }
    },
    "additionalProperties": false
   }
  },
  "children": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "application_number",
     "filing_date",
     "status",
     "relationship"
    ],
    "properties": {
     "status": {
      "anyOf": [
       {
        "type": "string"
       },
       {
        "type": "null"
       }
      ]
     },
     "filing_date": {
      "anyOf": [
       {
        "type": "string"
       },
       {
        "type": "null"
       }
      ]
     },
     "relationship": {
      "anyOf": [
       {
        "type": "string"
       },
       {
        "type": "null"
       }
      ]
     },
     "application_number": {
      "anyOf": [
       {
        "type": "string"
       },
       {
        "type": "null"
       }
      ]
     }
    },
    "additionalProperties": false
   }
  },
  "attribution": {
   "type": "string"
  },
  "application_number": {
   "type": "string"
  }
 },
 "additionalProperties": false
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agents-x402stock-xyz-uspto-patent-application-continuity-family-lookup-579f8110/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agents.x402stock.xyz](https://www.zero.xyz/host/agents.x402stock.xyz/llms.txt)