{"uid":"cap_bdRRbLs00ncg2AR57gH-u","slug":"halowerk-patent-prior-art-search-b83fd00f","name":"HALOWERK Patent Prior Art Search","description":"Collects up to 15 recent EP publication candidates from a caller-supplied IPC class through the official EPO Linked Open Data endpoint, embeds concept and title/abstract text locally with nomic-embed-text, and returns the closest matches. The IPC scope prevents a misleading full-corpus keyword scan that times out at the source. Coverage is European publications only and candidate retrieval is not exhaustive.","url":"https://research.halowerk.com/v1/patent-prior-art","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"ipc":{"type":"string","pattern":"^[A-H]\\d{2}[A-Z]\\d{1,4}-\\d{2,6}$","description":"Required EPO-style IPC class such as B28B7-00; it defines the official candidate set before semantic ranking."},"limit":{"type":"integer","default":5,"maximum":15,"minimum":1},"concept":{"type":"string","maxLength":5000,"minLength":20},"published_since_days":{"type":"integer","default":365,"maximum":3650,"minimum":7}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.015","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.015/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.015","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.015","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_VjscifoXVcut_Lnmd11F2","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.015","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Retrieves and semantically ranks recent European patent publications matching a given IPC class and concept, using EPO Linked Open Data and local embedding with nomic-embed-text.","exampleAgentPrompt":"Search for prior art in European patents under IPC class B28B7-00 for the concept 'automated mold release mechanisms using pneumatic actuators', looking back over the last 180 days and return the top 5 closest matches.","exampleUseCases":[{"title":"Pre-filing prior art check","prompt":"Before we file our patent on sensor-based tire pressure monitoring, can you search European patents in class B60C23-06 for the concept 'wireless TPMS sensor with Bluetooth low energy and predictive pressure analytics' over the last 2 years and show me the 5 most similar publications?"},{"title":"Freedom-to-operate investigation","prompt":"I need to know if our new biodegradable packaging material process might conflict with existing European patents — can you pull prior art from IPC class B65D65-46 for the concept 'plant-based polymer film for food packaging with moisture barrier properties', going back 3 years, and return the top 10 results?"},{"title":"Competitive patent landscape scan","prompt":"Can you find the most recent European patent publications in IPC class H04W72-04 related to 'dynamic spectrum sharing in 5G NR networks using AI-based scheduling', published in the last 90 days, and give me the 8 closest semantic matches?"}],"resultDescription":"Returns a ranked list of up to 15 European patent publication candidates, each with title, abstract, and a semantic similarity score relative to the input concept. Results are drawn from EPO Linked Open Data and filtered to the specified IPC class, then re-ranked by local embedding similarity using nomic-embed-text.","failureModes":["Invalid or malformed IPC class pattern causes rejection with schema validation error","EPO Linked Open Data SPARQL endpoint timeout if the IPC class is too broad or high-volume","Fewer than the requested number of candidates returned if the IPC class has sparse recent publications","Concept text too short (under 20 chars) or too long (over 5000 chars) triggers input validation error","published_since_days outside 7–3650 range causes parameter rejection","No results returned if IPC class has no publications within the specified time window"],"whenToPreferThis":"Choose this endpoint when you need semantically ranked European patent prior art scoped to a specific IPC class, rather than a full-corpus keyword search (which would time out at the EPO). Best suited for targeted prior art searches where the IPC class is known, coverage of European publications is sufficient, and a small ranked candidate set (up to 15) is acceptable. Not suitable for US or non-European patent searches, exhaustive corpus scans, or cases requiring more than 15 candidates.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:37:06.928Z","isFirstParty":false}