# 2s.io US Patent Application File-Wrapper Detail

> 2s.io US Patent Application File-Wrapper Detail is a paid API for AI agents from 2s.io, paid per call via x402, $0.0018/call, status unknown (last checked 2026-09-16).

Returns full USPTO file-wrapper detail for a US patent application by application number, including bibliographic data, prosecution history timeline, continuity chain, assignments, and foreign priority claims.

## Facts

- Endpoint: GET https://2s.io/api/patents/detail
- Price: $0.0018/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/2s-io-443cc6e0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VjiQb5rXz0LwOif--haQz

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 2s-io-443cc6e0
```

Example prompt: Pull the full file-wrapper for USPTO application number 18566276 — I need the prosecution history timeline, inventor and applicant info, any recorded assignments, and the continuity chain showing parent applications.

## When to prefer this

Use this endpoint when you need comprehensive, structured USPTO file-wrapper data for a specific US patent application by its application number — especially when you need prosecution history events, assignment chain, continuity relationships, or foreign priority claims in a single call. Prefer over manual USPTO PAIR/Patent Center lookups when automating patent due diligence, portfolio analysis, or legal research workflows.

## Known failure modes

- Application number not found — USPTO has no record of that application ID
- Invalid application number format — must be 6–10 digits
- Application data not yet publicly available (pre-publication)
- Payment failure via x402 protocol — insufficient USDC balance
- Network timeout on USPTO data retrieval

## How this service works

Full US patent application file-wrapper detail by application number. Returns bibliographic data (title, inventors, applicants, dates, status, examiner, art unit, docket #, confirmation #) plus the file-wrapper event timeline (filing, IDS, Office Actions, allowance, abandonment, …), continuity chain (parent / continuation / divisional / national stage), recorded assignments (assignor → assignee with reel/frame + conveyance text), and foreign priority claims under 35 USC § 119. Application number is the 6-10 digit USPTO ID (e.g. 18566276).

## Output

Returns a structured record containing: bibliographic data (title, inventors, applicants, filing/publication dates, status, examiner, art unit, docket number, confirmation number), a chronological file-wrapper event timeline (filing, IDS submissions, Office Actions, responses, allowance or abandonment events), the continuity chain (parent, continuation, divisional, national stage relationships), recorded assignments (assignor to assignee with reel/frame numbers and conveyance text), and foreign priority claims under 35 USC § 119.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "applicationNumber": "18566276"
  }
 }
}
```

## 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",
    "queryParams"
   ],
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "const": "GET"
    },
    "queryParams": {
     "required": [
      "applicationNumber"
     ],
     "properties": {
      "applicationNumber": {
       "type": "string",
       "description": "6-10 digit USPTO application number."
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/2s-io-443cc6e0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 2s.io](https://www.zero.xyz/host/2s.io/llms.txt)