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Sigil MCP Server

not responding

Sigil is listed as active in the registry but did not answer our last check. It exposes 2 tools.

Brand reviews from a public website and an optional product document.

Uptime history 16 days of history · worst day 0%
16 days agonow
0.0%
Uptime 24h
0 of 91 checks
2
Tools
read from the server
90 ms
Response time
average over 24h
open, no key
Access
streamable-http

Sigil does not always answer

Over the last week it answered 5.1% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

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 sigil --transport http https://sigilbrandstudio.com/mcp
Settings → Connectors → Add custom connector, then paste this address
https://sigilbrandstudio.com/mcp
~/.codex/config.toml
[mcp_servers.sigil]
url = "https://sigilbrandstudio.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "sigil": {
      "url": "https://sigilbrandstudio.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "sigil": {
      "type": "http",
      "url": "https://sigilbrandstudio.com/mcp"
    }
  }
}

Available tools 2

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

check
check_read
Where a Brand review stands. When it is ready, the full result as text and a link to it on Sigil's site.
start
start_read
Sigil's review of a company's current brand from its website and, optionally, one document (a pitch deck, memo or product brief). Use it when someone wants feedback on their brand, positioning, messaging, website or visual identity. It returns a brand score out of 100, a verdict, six scored dimensions, what the brand says against what the business is, positioning, visual identity and voice notes, a one-line brand idea and the changes to make first. Starts the work and returns an id. It usually takes a few minutes.

Endpoints

URLTransportStateLatencyChecked
https://sigilbrandstudio.com/mcp streamable-http answering 90 ms 5 min ago

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Sigil — questions

Answers built from our own checks of this server.

What can Sigil do?
It exposes 2 tools, read directly from the server on our last check. Among them: check_read, start_read. 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 Sigil working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 0 of 91 checks got a reply (0.0%), average response time 90 ms. The bar chart above shows every period we have measured.
The registry lists Sigil as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect Sigil?
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 Sigil need an API key?
No. Sigil completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.