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Professor Otter MCP Server

by professorotter Your server? Claim it
not responding

Professor Otter is listed as active in the registry but did not answer our last check. It exposes 6 tools.

Free printable kids activities: word searches, mazes, color by number, sudoku and more.

Uptime history 36 days of history · worst day 0%
36 days agonow
0.0%
Uptime 24h
0 of 91 checks
6
Tools
read from the server
121 ms
Response time
average over 24h
open, no key
Access
streamable-http

What changed 1

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 8 October 2026. No other catalogue keeps this.

8 Oct a tool description was rewritten list_products

Professor Otter does not always answer

Over the last week it answered 2.7% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 15 min ago.

run in your terminal
claude mcp add activities --transport http https://professorotter.com/mcp
Settings → Connectors → Add custom connector, then paste this address
https://professorotter.com/mcp
~/.codex/config.toml
[mcp_servers.activities]
url = "https://professorotter.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "activities": {
      "url": "https://professorotter.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "activities": {
      "type": "http",
      "url": "https://professorotter.com/mcp"
    }
  }
}

Available tools 6

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

activities
list_activities
List the Professor Otter printable activities (word searches, color by number, coloring pages, mazes, dot-to-dot, drawing practice, criss-cross, word scrambles, spot the difference, sudoku, games, secret codes, bingo, nonograms) with how many puzzles each has, its levels and its topics. Start here to see what the site offers.
search_activities
Search every printable activity by title, topic or a word in the puzzle, like the site's search box. Each query word must start a word in the puzzle ("ant" finds Ants, not Elephant). Narrow by activity or level if you like. Each hit includes the printable PDF and the play URL, plus slugs for get_activity and show_word_search. Puzzle PDFs include an answer key. Game and drawing practice PDFs do not.
activity
get_activity
Get one printable puzzle as Markdown (description, level, word list or color key) with its play URL and its PDF URL. A puzzle PDF has an answer key. A game or drawing practice PDF does not. Use an activity and slug from search_activities.
make
make_word_search
Turn a list of 4 to 20 words, like a child's spelling list, into a word search they can play in the chat, with a link to print it as a PDF with an answer key. Paste the list as one string or pass the words as an array. A word longer than the level's grid makes the grid grow to fit it. If the list breaks a rule (too few words, a word over 20 letters, a word inside another), the error says what to fix.
products
list_products
List the Professor Otter shop: printable PDF books, topic packs and the Everything Bundle, with prices and availability. Checkout is a browser page on the shop. Send the person there; never collect payment details or try to buy for them.
show
show_word_search
Show a word search a child can play in the chat: drag across the letters to find each word, and found words cross off the list. Also returns the grid as text and a link to print the PDF. Pass a seed for a new grid; a slug and seed always give the same grid here, on the site and in the PDF.

Endpoints

URLTransportStateLatencyChecked
https://professorotter.com/mcp streamable-http answering 121 ms 15 min ago

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Professor Otter — questions

Answers built from our own checks of this server.

What can Professor Otter do?
It exposes 6 tools, read directly from the server on our last check. Among them: get_activity, list_activities, list_products, make_word_search, search_activities, show_word_search. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is Professor Otter working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 0 of 91 checks got a reply (0.0%), average response time 121 ms. The bar chart above shows every period we have measured.
The registry lists Professor Otter as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect Professor Otter?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Professor Otter need an API key?
No. Professor Otter completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 6 of them are readable on this page. This is what we observed, not what the docs claim.