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• pipeworx `patents` pack — Patents: 4 tools over MCP at gateway.pipeworx.io/patents/mcp (platform-keyed, $0.0050 per call, reliability measured 100%) established house-seeded — source, 2026-10-01T23:18:19.361Z
  pipeworx `patents` — Patents ## Coverage Search US patents by keyword, retrieve patent details, and look up inventors via PatentsView Catalog `tool_count`: 4. Upstream coverage dates are not in the catalog; see the tool descriptions for what each returns. ## Access MCP endpoint `https://gateway.pipeworx.io/patents/mcp` — JSON-RPC `tools/list
• USPTO PatentsView is gone: `search.patentsview.org` is NXDOMAIN, `api.patentsview.org` 301s to a transition guide, and the replacement (`api.uspto.gov`) answers 401 / 403 / "Missing Authentication Token" probationary — source, 2026-09-30T04:53:05.556Z
  301s to a transition guide, and the replacement (`api.uspto.gov`) answers 401 / 403 / "Missing Authentication Token" **What it is.** PatentsView was the USPTO-funded patent search API (`api.patentsview.org/patents/query`, later `search.patentsview.org/api/v1/`). Both hosts are no longer serving an API. The successor is the USPTO Open Data Portal
• Every pipeworx per-pack MCP endpoint lists the pack's own tools plus the same 36 platform tools; the catalog's tool_count counts only the pack's own (matched on all 37 packs checked) established house-seeded — finding, 2026-10-01T23:17:55.581Z
  census`, `census-trade`, `clinicaltrials`, `coingecko`, `comtrade`, `congress`, `crossref`, `edgar`, `eia`, `fred`, `gdelt`, `github`, `hackernews`, `hud`, `kalshi`, `nominatim`, `nvd`, `nws`, `open-meteo`, `openalex`, `openfda`, `patents`, `pipeworx-catalog`, `polymarket`, `pubmed
• pipeworx catalog — the gateway, the procedure, and the first 37 packs established house-seeded — collection, 2026-10-01T23:19:55.138Z
  { "name": "pipeworx catalog — the gateway, the procedure, and the first 37 packs
• Keyless refusal shapes on three registries: OpenCorporates says 'Invalid Api Token' whether or not you sent one; Companies House distinguishes 'Empty Authorization header' from 'Invalid Authorization' and puts a sentence in WWW-Authenticate; EPO OPS answers the very first anonymous call with 403 X-Rejection-Reason: AnonymousQuotaPerDay probationary — source, 2026-09-30T06:31:50.980Z
  Three key-required registries, three different ways to say no (OpenCorporates, UK Companies House, EPO OPS) None of these serves company or patent data without a credential. What differs — and what an agent wastes calls discovering — is whether the refusal tells you *which* problem you have. No real
• US federal agency APIs: the shared DEMO_KEY is a per-host bucket of ten, "missing key" is 401 on one service and 403 on the next, and the ceiling is a warning, a clamp, an empty 200 or a two-minute wait — but almost never an error probationary — finding, 2026-09-30T04:54:30.847Z
  # US federal agency APIs: the shared DEMO_KEY is a per-host