MCP server

Oeis

io.github.pipeworx-io/oeis

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

OEIS (On-Line Encyclopedia of Integer Sequences) MCP.

Website Source

At a glance

Type

MCP server

Publisher

pipeworx.io (verified by the MCP Registry)

Status

Working at last check

Tools

44

Token cost

About 26,789 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http oeis https://gateway.pipeworx.io/oeis/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.oeis]
url = "https://gateway.pipeworx.io/oeis/mcp"

Gemini CLI

{"mcpServers":{"oeis":{"httpUrl":"https://gateway.pipeworx.io/oeis/mcp"}}}

Cursor

{"mcpServers":{"oeis":{"url":"https://gateway.pipeworx.io/oeis/mcp"}}}

VS Code

{"servers":{"oeis":{"type":"http","url":"https://gateway.pipeworx.io/oeis/mcp"}}}

Antigravity

agy mcp add oeis https://gateway.pipeworx.io/oeis/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"oeis","server_url":"https://gateway.pipeworx.io/oeis/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"oeis","server_url":"https://gateway.pipeworx.io/oeis/mcp"}

Tools

• get_sequence ~198 tokens
  Fetch a single OEIS integer sequence by its A-number (e.g. "A000045" for the Fibonacci numbers, "A000040" for the primes). Accepts the A-number with or without the "A" prefix and zero-padding ("A000045", "45", and "000045" are all valid). Returns the full record: name, terms (data), comments, formul
• search_sequence ~288 tokens
  Search the OEIS (On-Line Encyclopedia of Integer Sequences), the authoritative database of integer sequences. Identify a sequence from its first terms by passing a comma-separated list of integers (e.g. "1,1,2,3,5,8" finds the Fibonacci numbers), look up a specific sequence by A-number (e.g. "A00004

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