Public Domain Check

io.github.chomkaevan/public-domain-checkVersion 0.7.0

Is a book, film or song public domain in the US, UK, EU, Canada or Japan? Pay per call via x402.

Status

Responds245 msNov 14, 2026, 14:48 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 14:48 UTC
Latency: 245 ms
Remotes responding: 1 of 1
Sign-in: No sign-in
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 22:14 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://public-domain-check-production.up.railway.app/copyright/mcpResponds245 msNov 14, 2026, 14:48 UTC

No sign-in

Claude Code

claude mcp add --transport http public-domain-check https://public-domain-check-production.up.railway.app/copyright/mcp

Claude Desktop and claude.ai

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Settings > Connectors > Add custom connector
Name: public-domain-check
Remote MCP server URL: https://public-domain-check-production.up.railway.app/copyright/mcp

Cursor

{
  "mcpServers": {
    "public-domain-check": {
      "url": "https://public-domain-check-production.up.railway.app/copyright/mcp"
    }
  }
}

VS Code

code --add-mcp '{"name":"public-domain-check","type":"http","url":"https://public-domain-check-production.up.railway.app/copyright/mcp"}'

Streamable HTTP

npm: public-domain-check-mcp 0.7.0

Package only

npm (npx)

claude mcp add public-domain-check -- npx -y public-domain-check-mcp@0.7.0

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Tools

5 tools

Tools of Public Domain Check
	Description		Read-only	Idempotent	Open world
`check_public_domain`Check whether a specific book, film, song, recording or artwork is in the US public domain, and the date it enters it. Use this instead of answering from memory when the work was published 1929–1963 (its status depends on a copyright renewal that models usually don't know), when the work is obscure, or when you need a citable answer before quoting, reprinting, adapting, selling or training on it. Looks up 2.38M US Copyright Office registrations and 434k renewals; a title is usually enough for 1923–1977 books. Returns status, date, confidence, a one-line reason and record IDs, plus a second opinion from HathiTrust's human copyright reviewers and a free-copy link when there is one. Add countries=uk,eu,canada,australia,japan,china,india (or all) to get the answer for those countries in the same call. Not charged if it can't answer. Costs $0.01 (x402, USDC on Base).	Check whether a specific book, film, song, recording or artwork is in the US public domain, and the date it enters it. Use this instead of answering from memory when the work was published 1929–1963 (its status depends on a copyright renewal that models usually don't know), when the work is obscure, or when you need a citable answer before quoting, reprinting, adapting, selling or training on it. Looks up 2.38M US Copyright Office registrations and 434k renewals; a title is usually enough for 1923–1977 books. Returns status, date, confidence, a one-line reason and record IDs, plus a second opinion from HathiTrust's human copyright reviewers and a free-copy link when there is one. Add countries=uk,eu,canada,australia,japan,china,india (or all) to get the answer for those countries in the same call. Not charged if it can't answer. Costs $0.01 (x402, USDC on Base).	Not declared	Yes	Not declared	No
`check_public_domain_full`Same check as check_public_domain, but with the complete reasoning, every matching registration and renewal record, and all caveats. Use when you must show your work, cite sources in detail, or audit the decision. Costs $0.02 (x402, USDC on Base).	Same check as check_public_domain, but with the complete reasoning, every matching registration and renewal record, and all caveats. Use when you must show your work, cite sources in detail, or audit the decision. Costs $0.02 (x402, USDC on Base).	Not declared	Yes	Not declared	No
`copyright_rules_for_year`Free. Given a publication year (and type of work), say which US copyright rule applies and whether a records lookup is needed. Call this first when you only know the year: many years are settled by the rules alone.	Free. Given a publication year (and type of work), say which US copyright rule applies and whether a records lookup is needed. Call this first when you only know the year: many years are settled by the rules alone.	Not declared	Yes	Not declared	No
`public_domain_day`Free. What enters the US public domain on January 1 of a given year.	Free. What enters the US public domain on January 1 of a given year.	Not declared	Yes	Not declared	No
`search_copyright_renewals`Find who renewed a 1929–1963 work's US copyright and when: usually the current rightsholder or their estate. Use when you need to know whom to ask for permission or a license. Costs $0.01 (x402, USDC on Base).	Find who renewed a 1929–1963 work's US copyright and when: usually the current rightsholder or their estate. Use when you need to know whom to ask for permission or a license. Costs $0.01 (x402, USDC on Base).	Not declared	Yes	Not declared	No

Details

Registry status: Active
Published: Nov 14, 2026
Updated: Nov 14, 2026
Website: https://public-domain-check-production.up.railway.app/copyright⁠ (opens in a new tab)
Repository: https://github.com/chomkaevan/public-domain-check-mcp⁠ (opens in a new tab)
Categories (suggested): Design and mediaSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared

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