Identify integer sequences by terms, search the OEIS, read formulas, programs, b-files, cross-refs.
Connect Remote server
claude mcp add --transport http oeis-mcp-server https://oeis.caseyjhand.com/mcp
{
"mcpServers": {
"oeis-mcp-server": {
"url": "https://oeis.caseyjhand.com/mcp"
}
}
}
{
"servers": {
"oeis-mcp-server": {
"type": "http",
"url": "https://oeis.caseyjhand.com/mcp"
}
}
}
Settings > Connectors > Add custom connector
URL: https://oeis.caseyjhand.com/mcp
Tools 6 found in our last check
oeis_identify_sequenceIdentify 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 o…
oeis_search_sequencesSearch 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…
oeis_get_sequenceFetch 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 e…
oeis_get_termsList 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 returns up to limit terms (at most 1000 per ca…
oeis_get_cross_refsList 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 seque…
oeis_list_referenceLook 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).
Details
| Endpoint | https://oeis.caseyjhand.com/mcp (Streamable HTTP) |
| Package | @cyanheads/[email protected] (NPM, stdio) |
| Package | @cyanheads/[email protected] (NPM, streamable-http) |
| First published | 11 Nov 2026 |
| Last updated | 11 Nov 2026 |
| Registry name | io.github.cyanheads/oeis-mcp-server |
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