Oeis MCP server
MCP server for the OEIS (Online Encyclopedia of Integer Sequences) API
1 stars14 downloads/wk
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If you have run it, two minutes of your experience saves the next person an afternoon.
Oeis tools (3)
write = sends, deletes, buys or postsRead from the package source without running it. The installed server may list more.
get_sequence_by_idGet a sequence by its OEIS ID (e.g., "A000109" for simplicial polyhedra, "A000045" for Fibonacci).
search_by_nameSearch OEIS sequences by name or keyword.
search_by_termsSearch OEIS sequences by providing integer terms.
Public scan report
scanner v0.1.9 · 2026-09-27 · same rubric, same numbers if you re-run it
- Code scan5 source files scanned25/25
- –Live reliabilityno gateway calls yet and no remote to proben/a
- –Tool poisoningtools not inspected (local package is not executed); not countedn/a
- Auth qualitylocal package, no credentials required12/15
- Maintenancelast push 159 days ago8/15
- Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
How Oeis compares
Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.
- Safety score
- 82/100
- higher than 63% of 48,273 servers
- Tools
- 3
- the typical server has 7
- Tools that change things
- 0%
- typical: 0%. Fewer write tools means less an agent can break
- GitHub stars
- 1
- more than 65% of 28,534 servers
- Downloads a week
- 14
- more than 4% of 11,915 servers with a package
What its tools let an agent do: 3 read
Install Oeis in Claude Code, Cursor or VS Code
claude mcp add mcp-oeis -- uvx mcp-oeis
What the publisher says
From the Oeis repository's README, as published. We do not edit it. Read it on GitHub
mcp-oeis
MCP server for the OEIS (Online Encyclopedia of Integer Sequences) API
mcp-name: io.github.daedalus/mcp-oeis
Install
pip install mcp-oeisUsage
As an MCP Server
Configure in your MCP settings:
{
"mcpServers": {
"mcp-oeis": {
"command": "mcp-oeis"
}
}
}Python API
from mcp_oeis import mcp
# Get a sequence by ID
result = mcp.get_sequence_by_id("A000109")
print(result["terms"]) # [1, 1, 1, 2, 5, 14, ...]
# Search by terms
results = mcp.search_by_terms([1, 1, 2, 3, 5, 8])
print(results[0]["name"]) # "Fibonacci numbers"
# Search by name
results = mcp.search_by_name("prime")
print(results[0]["id"]) # "A000040"MCP Tools
getsequenceby_id
Get a sequence by its OEIS ID (e.g., "A000109" for simplicial polyhedra, "A000045" for Fibonacci).
searchbyterms
Search OEIS sequences by providing integer terms. For example, searching [1,1,2,3,5,8] will find the Fibonacci sequence.
searchbyname
Search OEIS sequences by name or keyword. For example, searching "Fibonacci" will find Fibonacci-related sequences.
Development
git clone https://github.com/daedalus/mcp-oeis.git
cd mcp-oeis
pip install -e ".[test]"
# run tests
pytest
# format
ruff format src/ tests/
# lint
ruff check src/ tests/
# type check
mypy src/Nothing above is checked by us. What we check is on the safety report.
Oeis: common questions
- Is Oeis MCP server safe?
- Mostly: it is graded B (82/100). Read the Oeis safety report
- How do I install Oeis?
- It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
- Does Oeis need an API key?
- Not as far as the registry entry and our scan can tell: no credentials are declared or required.
- Is Oeis maintained?
- The last commit was 195 days ago (2026-04-21). The latest release is v0.1.0.
- How does Oeis compare with other MCP servers?
- safety score 82/100 (higher than 63% of 48,273 servers); tools 3 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.