io.github.cyanheads/oeis-mcp-server

up checked 2026-11-10T23:37:48.609Z

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Publisher-provided description

Identify integer sequences by terms, search the OEIS, read formulas, programs, b-files, cross-refs.

Summary by lookupd

Searches and identifies integer sequences by terms or keywords, and retrieves formulas, programs, b-file terms and cross-references.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http oeis-mcp-server https://oeis.caseyjhand.com/mcp

Claude Code, npm package (stdio)

claude mcp add oeis-mcp-server -- npx -y @cyanheads/oeis-mcp-server

Claude Code, npm package (stdio)

claude mcp add oeis-mcp-server -- npx -y @cyanheads/oeis-mcp-server

Codex, remote (streamable-http)

codex mcp add oeis-mcp-server --url https://oeis.caseyjhand.com/mcp

Codex, npm package (stdio)

codex mcp add oeis-mcp-server -- npx -y @cyanheads/oeis-mcp-server

Codex, npm package (stdio)

codex mcp add oeis-mcp-server -- npx -y @cyanheads/oeis-mcp-server

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "oeis-mcp-server": {
      "url": "https://oeis.caseyjhand.com/mcp"
    }
  }
}

Cursor, npm package (stdio) → .cursor/mcp.json

{
  "mcpServers": {
    "oeis-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/oeis-mcp-server"
      ]
    }
  }
}

Cursor, npm package (stdio) → .cursor/mcp.json

{
  "mcpServers": {
    "oeis-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/oeis-mcp-server"
      ]
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (6 tools)

Publisher-provided text

• oeis_identify_sequence Identify integer sequences that contain a run of consecutive terms, e.g. "1, 2, 5, 14, 42". Returns up to 10 matches per page in OEIS relevance order, each with
• oeis_search_sequences Search the OEIS using its query syntax: plain words, "quoted phrases", comma-separated terms, prefixes (keyword:, author:, name:, comment:, formula:, program:,
• oeis_get_sequence Fetch one OEIS entry by A-number. Returns the name, data-line terms, offset, keywords, author, dates, and the sections: comments, formulas (recurrences and gene
• oeis_get_terms List terms a(n) of a sequence with their indices n. Reads the entry's b-file when it has one — often thousands of terms beyond the data line — and otherwise the
• oeis_get_cross_refs List sequences related to an OEIS entry. direction outgoing returns the A-numbers named in the entry's cross-reference (Cf.) lines, with any parenthetical note
• oeis_list_reference Look up OEIS vocabulary used by the other tools: keyword flags (nonn, core, tabl, cons, …), search syntax (prefixes, operators, wildcards, sort orders, paging w

Changes

Newest first, as lookupd saw them

• 2026-11-11: version 0.1.3 → 0.2.0

Details

• Version: 0.2.0
• Transports: streamable-http, stdio
• Uptime (7 days): 100%
• Median latency: 654 ms
• First indexed: 2026-11-01T09:26:23.058Z
• Last seen in registry: 2026-11-11T06:17:19.804Z
• Repository: https://github.com/cyanheads/oeis-mcp-server

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