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Patent77
What it is
Patent77 searches public patent records for prior art using a plain-English invention description, then returns cited references with a knockout-risk read. Its search process breaks an invention into claim-style elements, broadens terms with synonyms, runs repeated queries and scores relevant candidate documents. Searches query the live Google Patents record, including US and major international collections. Paid patentability reports add an element-by-reference map, a novelty and obviousness discussion, limitations and PDF export. Publication-number lookups are never billed. The product is available as a web app and API, with a hosted MCP server for search, patent lookup and patentability assessment. Anonymous API calls need no account, but are limited to 4 requests per minute, 20 per day and three references per search. The Free plan is free and includes 3 AI searches per month and the top 5 references. Pro costs $49 a month. Patent77 says search descriptions are account-scoped and are not used to train models, shown to other users or sold. It also states that it is not legal advice.
For and against
For
- Searches US and major international patent collections.
- Publication-number lookups are never billed.
- Offers a free tier with 3 AI searches monthly.
- Provides API and hosted MCP access.
Against
- Free tier is limited to 3 AI searches monthly.
- Does not cover non-patent literature.
- Does not include unpublished applications in the 18-month window.
- Not legal advice.
The verdict
Patent77 combines prior-art search with cited references and optional report detail, with access through a web app and API. Its stated corpus exclusions and legal limitation are important to consider before relying on results for filing decisions.
Who it suits
Patent77 is aimed at inventors and founders, attorneys and agents at small firms, and AI agents seeking prior-art references. It may suit users who want an initial search, while filing decisions call for a registered patent attorney or agent.
Plans and prices
Free
3 AI searches/mo · top 5 references · web app only
Read 5 Oct 2026 · patent77.com
Pro
50 searches/mo · 10 reports/mo, then $4/report · API + MCP · 10 monitors
Read 5 Oct 2026 · patent77.com
Scale
300 searches/mo · 60 reports/mo, then $2.50/report · 600 requests/min · 100 monitors
Read 5 Oct 2026 · patent77.com
On the record
- API trial
- Anonymous API calls can search and look up patents without an account, limited to 4 requests per minute, 20 per day, and three references per search.patent77.com · read 5 Oct 2026
- Data processing
- Search descriptions are sent to an AI provider for query planning and reference reading, while derived queries rather than raw descriptions are sent to the public patent corpus.patent77.com · read 5 Oct 2026
- Data source
- Searches query the live Google Patents record, including US and major international patent collections.patent77.com · read 5 Oct 2026
- Deletion
- Deleting an account removes its searches, reports, monitors, and keys, while backups expire on a fixed schedule.patent77.com · read 5 Oct 2026
- Integrations
- The product offers a JSON API and hosted MCP server, with tools named search_prior_art, get_patent, and assess_patentability.patent77.com · read 5 Oct 2026
- Intended users
- The site describes inventors and founders, attorneys and agents at small firms, and AI agents as audiences for the product.patent77.com · read 5 Oct 2026
- Legal limitation
- Patent77 states that it is not legal advice and recommends consulting a registered patent attorney or agent for filing decisions.patent77.com · read 5 Oct 2026
- Limits
- Patent77 does not cover non-patent literature, unpublished applications in the 18-month publication window, or collections outside its corpus.patent77.com · read 5 Oct 2026
- Patent lookup
- Patent lookups by publication number are never billed.patent77.com · read 5 Oct 2026
- Purpose
- Patent77 searches the live public patent record for prior art based on a plain-English invention description and returns cited references with a knockout-risk read.patent77.com · read 5 Oct 2026
- Reports
- Paid patentability reports include an element-by-reference map, an examiner-style novelty and obviousness narrative, limitations, and PDF export.patent77.com · read 5 Oct 2026
- Search method
- The engine decomposes an invention into claim-style elements, expands synonyms, runs iterated queries, reads candidate documents, and scores relevant references.patent77.com · read 5 Oct 2026
- Security
- Patent descriptions are stored as saved searches scoped to the user's account and are not used to train models, shown to other users, or sold.patent77.com · read 5 Oct 2026
- Storage and transport
- The service says it uses TLS, managed Postgres through Supabase with row-level security, and hashed API keys.patent77.com · read 5 Oct 2026
