Connect
Use this site from inside your AI assistant
Add one address to Claude or ChatGPT and it can search every essay here, read the claim ledger behind each checked essay, and look up every call made in the Weekly. It can only read. There is no account and no sign-in.
Your connector address
https://mcp.durabilitycurve.com/mcp Your address ends in a random code that your browser makes when you click. Nothing is sent when it is made. The code lets me count how many people use the connector and how many come back, without knowing who anyone is. Until you click, the address above is the plain one, which works the same way and is counted only in total.
The code at the end of this address was made in this browser, and nothing was sent when it was made. This browser keeps it, so you see the same address when you come back. It lets me count how many people use the connector and how many return, without knowing who anyone is.
Add it to your assistant
Claude, on the web or the desktop app
- Open Customize, then Connectors.
- Click Add, then Add custom connector.
- Name it The Durability Curve, paste your address, set Authentication to No sign-in and click Add.
- In a chat, open the + menu, choose Connectors and switch it on.
Free, Pro and Max accounts can do this; a free account can add one custom connector. On a Team or Enterprise plan, an owner adds it under Organization settings, then Connectors. Once added on the web, it also works in the Claude phone apps.
ChatGPT, on the web
- Go to chatgpt.com/plugins and click +, then Create custom MCP server.
- Name it The Durability Curve, paste your address and choose No authentication.
- Read the warning, confirm it, and click Create as a plugin.
- In a chat, type @ and pick it.
This needs a Plus or Pro account; free ChatGPT accounts cannot add custom servers yet. ChatGPT warns about any server it has not reviewed itself, this one included. Business and Enterprise workspaces need an admin to allow it.
Claude Code
claude mcp add --transport http durability-curve https://mcp.durabilitycurve.com/mcpCursor and VS Code
Cursor: add this to ~/.cursor/mcp.json.
{
"mcpServers": {
"durability-curve": {
"url": "https://mcp.durabilitycurve.com/mcp"
}
}
}
VS Code with Copilot: add this to ~/.copilot/mcp-config.json. Keep it in this file in your home
folder rather than in a project, so your address is never committed with your code.
{
"mcpServers": {
"durability-curve": {
"type": "http",
"url": "https://mcp.durabilitycurve.com/mcp"
}
}
}Things to ask it
Search The Durability Curve for what it says about agent reliability, then show me the claim ledger behind the best match.
Which calls in The Durability Curve Weekly resolve before April 2027, and at what confidence?
Read the essay about the marathon gap and tell me which of its claims were checked against a primary source.
What it can and cannot do
It has four tools, and each one only reads: search across the essays, their claims, the weekly calls, the five laws the essays are tested against and the free tools; get_essay for the full public text of one essay; get_claim_ledger for the claims one essay makes and how each was checked; and get_weekly_calls for every call with its printed confidence. For a paid essay it sees only the free part, the same as any visitor.
It retrieves what is published here and says where each answer came from. It does not decide whether a claim is true. A claim ledger records what the source said and how it was checked, and your assistant should cite the page it links to.
It sees what your assistant sends it, such as a search phrase, uses that to answer, and keeps none of it. What it keeps is a weekly record for each connector code: the week, which tools were used and how often, under a scrambled form of the code that cannot be turned back into it. The privacy page explains it, and how to have yours deleted.