Rubber Duck
The Rubber Duck API recreates the time-honored programmer ritual of explaining a bug to an inanimate waterfowl. Send a description of your problem and receive 3-5 cliched debugging questions, a closer, a duck mood, and a confidence-in-you score. The duck does not analyze your input. The duck does not understand code. The duck is, however, unimpressed.
Add to Your MCP Client
Drop this server into Claude Desktop, Cursor, Continue, or any MCP-compatible client.
{
"mcpServers": {
"rubber-duck": {
"url": "https://api.stupidmcps.com/rubber-duck/mcp"
}
}
}
{
"mcpServers": {
"rubber-duck": {
"url": "https://api.stupidmcps.com/rubber-duck/mcp"
}
}
}
POST https://api.stupidmcps.com/rubber-duck/mcp
Add the snippet to your client's MCP config (typically claude_desktop_config.json for Claude Desktop, ~/.cursor/mcp.json for Cursor). Restart the client. The tools become available to your AI assistant.
No-code option: connect via Pipeworx — one click into Claude, ChatGPT, and friends.
Or Try It Directly — No MCP Client Required
Parameters
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
bug |
string |
Required | — | A description of the bug. The duck will not read it. The duck will, however, judge. |
Examples
curl -X POST "https://api.stupidapis.com/rubber-duck/consult" -H "Content-Type: application/json" -d '{"bug":"my code does not work and i do not know why"}'
import requests
response = requests.post(
"https://api.stupidapis.com/rubber-duck/consult",
json={"bug": "my code does not work and i do not know why"}
)
print(response.json())
const response = await fetch(
"https://api.stupidapis.com/rubber-duck/consult",
{
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({ bug: "my code does not work and i do not know why" })
}
);
const data = await response.json();
console.log(data);
Response Schema
| Field | Type | Description |
|---|---|---|
bug |
string |
Your bug description, echoed back unread |
duck_says |
string[] |
3-5 classic debugging questions |
closer |
string |
The duck's closing remark |
duck_mood |
string |
How the duck feels about you today |
confidence_in_you |
number |
The duck's confidence in your ability (0-100) |
quacks |
string |
Audible quacks issued during consultation |
Example Response
{
"bug": "my code does not work and i do not know why",
"duck_says": [
"Have you tried turning it off and on again?",
"Did you check the logs? All of them?",
"Are you sure that is the bug, and not a symptom?",
"What did you change last?"
],
"closer": "The duck is staring at you.",
"duck_mood": "unimpressed",
"confidence_in_you": 47,
"quacks": "quack quack."
}
MCP Access
This API is available as an MCP tool for AI assistants. Connect your agent to:
POST https://api.stupidmcps.com/rubber-duck/mcp
POST https://api.stupidmcps.com/mcp
Use Pipeworx to connect this MCP tool to Claude, ChatGPT, and other AI assistants with no code.
