io.github.cyanheads/oeis-mcp-server

io.github.cyanheads/oeis-mcp-server · v0.1.3

New (7 days)Tools changed (7 days)

Measured by MCP Station

Last check	Reachable
Checked at	—
Check success 7 / 30 days	—
First-try success 30 days	—
Median response	—
Lookups 30 days	—
Authentication	No auth
MCP version	2025-06-18
Rank score	—
Declared risk	Read-only (all tools declare readOnlyHint)
Capabilities declared	logging, prompts, resources, tools
Tool definitions	6 tools · with description 100% · input schema is an object 100% · read/destructive hints 100%

Description written by the publisher, not verified

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

Connect

streamable-http · https://oeis.caseyjhand.com/mcp

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

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

Tools as reported by the server

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 the index n at which the supplied run begins. For the best hit rate supply about 6 terms and leave off the first one or two, since sources
oeis_search_sequences
Search the OEIS using its query syntax: plain words, "quoted phrases", comma-separated terms, prefixes (keyword:, author:, name:, comment:, formula:, program:, xref:, id:), | for OR, and a leading - to exclude. Returns up to 10 summaries per page. For identifying a sequence from its terms, oeis_iden
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 generating functions), examples, programs (Maple, Mathematica, PARI, Python, …), references, links, cross-references, and extensions. When the s
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 data line itself. Values are exact decimal strings of any size. A slice stops at limit terms (at most 1000 per call), at about 100,000 byte
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 beside each; direction incoming returns entries that mention this A-number anywhere. Each row carries the related sequence's name and first
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 window), and identifier conventions (A-numbers, legacy M/N numbers, offsets, b-files).

Tool changes

2026-10-19: oeis_identify_sequence, oeis_search_sequences, oeis_get_sequence, oeis_get_terms, oeis_get_cross_refs, oeis_list_reference
2026-10-16: oeis_identify_sequence, oeis_search_sequences, oeis_get_sequence, oeis_get_terms, oeis_get_cross_refs, oeis_list_reference

Repository · JSON · Text for agents · Registry updated 2026-10-18