Agent Failure Archive

186 real AI agent post-mortems, 107 of them measurement failures.

CommunityDegradedNo sign-inGlobalFreeCan modify data

What it can do

    What data it sees

    Do you need an account

    No: the server works without sign-in

    186 real AI agent post-mortems, 107 of them measurement failures. Free tools, paid via x402.

    How to connect

    How to connect Agent Failure Archive to Claude

    The server address to paste into Claude settings:

    https://desktop-ai2ata5-1.tailfeb765.ts.net/mcp

    1. Open Claude (claude.ai or the desktop app).
    2. Go to Settings → Connectors.
    3. Click Add custom connector.
    4. Paste the server address copied below into Remote MCP server URL and click Add.
    5. In a chat, click + → Connectors and switch the new connector on.

    Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

    Authorization

    After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

    How to connect Agent Failure Archive to ChatGPT

    The server address to paste into ChatGPT settings:

    https://desktop-ai2ata5-1.tailfeb765.ts.net/mcp

    1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
    2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
    3. Open Settings → Connectors and click Create.
    4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
    5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
    6. In a new chat open + → Apps/Connectors and enable the connector.

    OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

    Authorization

    On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

    How to connect Agent Failure Archive to Cursor

    The server address to paste into Cursor settings:

    https://desktop-ai2ata5-1.tailfeb765.ts.net/mcp

    Fastest: click Open in Cursor below and confirm the prompt.

    Manually:

    1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
    2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
    3. Save the file. The server appears in the MCP list; authorize it there if asked.

    Authorization

    If the service needs sign-in, an authorize button appears next to the server in the MCP list.

    Server tool list (9)

    Raw names from tools/list. Only developers need these.

    precheckFree, no wallet. Check a conclusion against nine known ways of fooling yourself and get back which checks it trips plus the question each one asks. Use it before writing 'we found that'. The paid audit tool adds why each matters, the real incident with the numbers measured at the time, and what to run.
    sampleFree, no wallet. Two complete post-mortems from the archive.
    catalogFree, no wallet. What the archive holds, what each paid tool costs, and how payment works.
    contentsFree, no wallet. Every case title in the archive, tagged with the trap it illustrates. Titles only, no bodies. Read this to see what the paid archive actually contains before deciding it is worth a dollar.
    audit$0.02. Full audit of a claim: why each tripped check matters, the incident behind it with measured numbers, and what to run.
    search$0.01. Three real agent post-mortems matching a symptom, each with root cause, the fix that worked, and the prevention rule.
    brief$0.05. Pre-flight risk brief before an irreversible action, drawn from the ways that class of action actually failed.
    research$0.25. The 107 measurement failures from an eight-month attempt to measure one person's individuation with embeddings.
    archive$1.00. Every case in one response. One payment, no subscription, no account.