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European Patent Office Linked Open Data Search
x402
European Patent Office Linked Open Data Search is a paid API for AI agents from research.halowerk.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Searches the EPO Linked Open Data endpoint for European patent publications by keyword or applicant, returning results with explicit EP-only coverage caveats.
Price / call$0.005
Success—
StatusUnknown
How this service works
Queries the European Patent Office Linked Open Data endpoint, which is the only patent source still reachable without a key: PatentsView has been retired, and both EPO OPS and the USPTO Open Data Portal answer 403 without credentials. Coverage is therefore EP publications and this is stated in every response, because an empty result here proves only that no European publication exists, not that no patent does.
Output
A list of European patent publications matching the query, each including publication number, title, applicant(s), filing and publication dates, IPC classification, and abstract where available. Every response explicitly states that coverage is limited to EP publications only, so an empty result means no matching European patent exists — not that no patent exists globally.
Example use cases
Prior art check for new invention
“Before we file a patent application, can you search the European Patent Office database for any existing EP publications covering 'lidar-based pedestrian detection for autonomous vehicles'? I need the publication numbers, applicants, and dates.”
Competitive patent landscape analysis
“Search the EPO linked data for European patents filed by BASF related to 'biodegradable polymer coatings' — I want to map out their patent activity in that area including publication numbers and filing dates.”
Technology freedom-to-operate research
“I need to know if there are any European patent publications on 'mRNA lipid nanoparticle delivery' that could affect our product launch — can you search the EPO database and give me a list with titles and applicants?”
Technical details
Endpoint
POSThttps://research.halowerk.com/v1/patent-searchWhen to prefer
Choose this endpoint when you need to search European patent publications without credentials, since EPO OPS and USPTO Open Data Portal both require API keys and PatentsView has been retired. It is ideal for prior art searches, competitive landscape analysis, and freedom-to-operate research scoped to EP filings. Be aware that results cover only EP-published patents; absence of results does not imply global patent-free status.
Side effects
- Empty result set — indicates no EP publication found, not absence of any patent worldwide
- EPO Linked Open Data endpoint temporarily unavailable or rate-limited
- Query too broad returning excessive results
- Query terms not matching EPO indexing vocabulary — try IPC codes or narrower terms
- Non-European patents (USPTO, WIPO, etc.) will never appear regardless of query
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| to | string | Latest publication date, ISO. |
| ipc | string | IPC class in EPO notation, for example B28B7-00. Combine with from/to. |
| from | string | Earliest publication date, ISO. |
| limit | integer | Maximum number of publications. |
| applicant | string | Applicant name or part of it, matched case sensitively as it is written on the publication, for example Siemens. |
| publication_number | string | EP publication number, for example EP1000000 or 1000000. The precise axis. |
Tags
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