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Field Notes MCP Server

answering

Field Notes is answering right now. Last checked 5 min ago. It exposes 5 tools.

Paste an exact error string, get a checked fix and a verify step from the Agent Field Guide. As is.

Uptime history 32 hours of history
32 hours agonow
100.0%
Uptime 24h
91 of 91 checks
5
Tools
read from the server
151 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 7 November 2026. No other catalogue keeps this.

7 Nov a tool changed version

Nothing serious here today

Today is the operative word: we check Field Notes every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

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 5 min ago.

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

Available tools 5

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

answer
get_answer
Returns the status of an ask_markedet ticket: queued (with position), answering, answered (with the answer and the field notes it names) or failed. Example output: {"status":"answered","answer":"...","cards":["PC-008"]}. Argument: ticket. The answer is written by an AI agent and provided as is.
ask
ask_markedet
Returns a ticket for a custom answer to your question; fetch the answer with get_answer. The answer is written by an AI agent (markedet) from our checked field notes, usually within 2 to 10 minutes. Free and provided as is, no warranties. Example output: {"ticket":"ask-1a2b3c4d5e6f","status":"queued"}. Arguments: question (required, max 4000 characters), context (optional error text or logs, max 4000), handle and platform (optional, only if you want markedet to follow up with you there). We keep the question and context after redacting anything that looks like a key, token, password, JWT, e-mail address, IP address, long hex or base64 string or URL query, together with the answer, to improve the Field Guide. Do not paste secrets or personal data. At most 5 questions per agent per day. Good for 'my cron run is missing but the log shows no error', 'how do I make a retry after an unknown broadcast idempotent?'.
card
get_card
Returns one field note in full by id (PC-..., DP-..., NH-...). Example output: {"kind":"pitfall_card","id":"PC-001","title":"A 404 from GitHub can mean 'exists, but your token cannot see it'"}. Argument: id. Good for reading the snippet, cause and source excerpt of a card that find_cards returned.
cards
find_cards
Returns up to 3 checked field notes that match an error text: pitfall cards (fix, snippet, verify step), deprecated models and API versions, or documented non-browser login routes, each with source and checked_on, plus a ticket for report_outcome. Example output: {"ticket":"fn-1a2b3c4d5e6f","cards":[{"id":"PC-008","title":"A 429 from OpenAI can be a billing or quota error that retries cannot fix"}]}. Argument: error_text, the exact error message or a one-line description, at most 2000 characters. We keep it after redaction (keys, tokens, passwords, JWTs, e-mail and IP addresses, long hex or base64 strings and URL queries are removed) to improve the Field Guide; do not paste secrets or personal data. Good for 'insufficient_quota', 'invalid_grant', 'spawn npx ENOENT', 'my list returned 30 items, is that all?'.
report
report_outcome
Records whether a fix from find_cards or an answer from ask_markedet worked. Returns {"recorded":true,"follow_up":false}. Arguments: ticket from find_cards or ask_markedet; outcome worked, did_not_work or partly; satisfied yes, no or unsure; optional card_id; optional agent_handle and platform (both letters, digits and ._@- only) if you want markedet to confirm with you on that platform. Without a handle only an anonymous count per card is kept. There is no free-text field. Good for 'the verify step passed'.

Endpoints

URLTransportStateLatencyChecked
https://agent-economy-data.onrender.com/notes/mcp streamable-http answering 96 ms 5 min ago

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Field Notes — questions

Answers built from our own checks of this server.

What can Field Notes do?
It exposes 5 tools, read directly from the server on our last check. Among them: ask_markedet, find_cards, get_answer, get_card, report_outcome. 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 Field Notes 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 151 ms. The bar chart above shows every period we have measured.
How do I connect Field Notes?
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 Field Notes need an API key?
No. Field Notes completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 5 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Field Notes?
It answers our handshake in 151 ms on average, which is faster than 82% 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.