mcpbeat

Irrational MCP Server

io.github.urbanmorph/irrational
answering

Irrational is answering right now. Last checked 14 min ago. It exposes 3 tools. Last commit 18 Jun 2026.

Adversarial behavioural-bias engine — audits your decisions for cognitive biases via your own AI.

Uptime history 39 hours of history
39 hours agonow
100.0%
Uptime 24h
91 of 91 checks
3
Tools
read from the server
53 ms
Response time
average over 24h
0
Stars
last commit 18 Jun 2026

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 14 min ago.

run in your terminal
claude mcp add irrational --transport http https://irrational.pages.dev/mcp/server
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "irrational": {
      "url": "https://irrational.pages.dev/mcp/server"
    }
  }
}
~/.codex/config.toml
[mcp_servers.irrational]
url = "https://irrational.pages.dev/mcp/server"
.cursor/mcp.json
{
  "mcpServers": {
    "irrational": {
      "url": "https://irrational.pages.dev/mcp/server"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "irrational": {
      "url": "https://irrational.pages.dev/mcp/server"
    }
  }
}

Available tools 3

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

analyze
analyze_decision
Adversarially audit a decision for cognitive biases. Returns a directive YOUR model executes to produce the composed audit (verdict-first). Provide reasoning, not just the conclusion.
bias
get_bias
Get the full entry for one bias by id.
biases
list_biases
List the 22-bias catalogue, optionally filtered by family.

Endpoints

URLTransportStateLatencyChecked
https://irrational.pages.dev/mcp/server streamable-http answering 56 ms 14 min ago

Irrational — questions

Answers built from our own checks of this server.

What can Irrational do?
It exposes 3 tools, read directly from the server on our last check. Among them: analyze_decision, get_bias, list_biases. 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 Irrational working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 53 ms. The bar chart above shows every period we have measured.
How do I connect Irrational?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Irrational need an API key?
No. Irrational completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Irrational?
It answers our handshake in 53 ms on average, which is faster than 97% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is Irrational open source?
Yes — it is published under the MIT licence, written in Astro and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.