# EPO Worldwide Patent Search via 2s.io

> EPO Worldwide Patent Search via 2s.io is a paid API for AI agents from 2s.io, paid per call via x402, $0.0045/call, status unknown (last checked 2026-09-14).

Search worldwide patent publications using the European Patent Office's Open Patent Services (OPS) via a CQL query, returning matching publications with metadata and total result count.

## Facts

- Endpoint: GET https://2s.io/api/patents/epo-search
- Price: $0.0045/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/epo-worldwide-patent-search-via-2s-io-e38c1758
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XJDOId49L2EYfT-SgoWO7

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 epo-worldwide-patent-search-via-2s-io-e38c1758
```

Example prompt: Search worldwide patents for quantum computing inventions by Tesla — use the CQL query 'ti=quantum computing and pa=tesla' and return up to 20 matching publications with their country, document number, and kind code.

## When to prefer this

Use this endpoint when you need worldwide patent coverage beyond US-only sources, especially for European Patent Office (EP) publications and patents from 100+ international authorities. Prefer this over US-patent-only APIs when searching by CPC classification, inventor, assignee, or publication number across global jurisdictions.

## Known failure modes

- Invalid or malformed CQL query returns an error
- Query string shorter than 2 characters is rejected
- Limit parameter outside 1-100 range returns validation error
- No results found for highly specific queries
- EPO OPS upstream service unavailable causing timeout or 5xx error
- Payment failure (x402) if USDC balance is insufficient

## How this service works

Search worldwide patent publications via the European Patent Office's Open Patent Services (OPS). Pass a CQL query (e.g. ti=quantum computing, in=tesla, pa=siemens, cpc=H01M, pn=EP1000000) and get matching publications with country, document number, kind code, and a combined publication number, plus the total result count. Covers EP + 100+ patent authorities worldwide — net-new vs our US-only patents.search.

## Output

A list of matching patent publications each containing country code, document number, kind code, and a combined publication number, plus the total count of matching results across EP and 100+ worldwide patent authorities.

## 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": {
     "type": "object",
     "required": [
      "q"
     ],
     "properties": {
      "q": {
       "type": "string",
       "maxLength": 400,
       "minLength": 2,
       "description": "CQL query, e.g. \"ti=quantum computing\" or \"pa=siemens and cpc=H01M\"."
      },
      "limit": {
       "type": "integer",
       "maximum": 100,
       "minimum": 1
      }
     },
     "additionalProperties": false
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/epo-worldwide-patent-search-via-2s-io-e38c1758/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)