mcpbeat

Semiotic MCP Server

io.github.nteract/semiotic
answering

Semiotic is answering right now. Last checked 8 min ago. 10 878 installs a week from npm. It exposes 5 tools. Last commit 4 Aug 2026.

Verified React chart generation: select, validate, repair, render, and inspect charts through MCP.

Installs per day peak 3 136 · avg 1 340 · -3% w/w
a month agotoday
Uptime history 45 hours of history
45 hours agonow
100.0%
Uptime 24h
91 of 91 checks
5
Tools
read from the server
265 ms
Response time
average over 24h
10 878
Installs / week
npm and PyPI

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 8 min ago.

run in your terminal
claude mcp add semiotic --transport http https://semiotic-mcp-server-481507046413.us-west1.run.app/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "semiotic": {
      "url": "https://semiotic-mcp-server-481507046413.us-west1.run.app/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.semiotic]
url = "https://semiotic-mcp-server-481507046413.us-west1.run.app/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "semiotic": {
      "url": "https://semiotic-mcp-server-481507046413.us-west1.run.app/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "semiotic": {
      "url": "https://semiotic-mcp-server-481507046413.us-west1.run.app/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.

auditchart
auditChart
Run design diagnostics plus accessibility and mobile audits, returning prioritized structured findings.
createchart
createChart
Select, validate, diagnose, render, and prove a static-data Semiotic chart. This is the default public workflow.
explainchart
explainChart
Return reader grounding: chart description, communicative intent, and navigable data structure.
getchartschema
getChartSchema
Return canonical Semiotic prop-schema guidance for code editing and advanced configuration.
improvechart
improveChart
Diagnose a chart configuration, assess data fit, and propose repairs or variants.

Endpoints

URLTransportStateLatencyChecked
https://semiotic-mcp-server-481507046413.us-west1.run.app/mcp streamable-http answering 278 ms 8 min ago

Semiotic — questions

Answers built from our own checks of this server.

What can Semiotic do?
It exposes 5 tools, read directly from the server on our last check. Among them: auditChart, createChart, explainChart, getChartSchema, improveChart. 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 Semiotic 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 265 ms. The bar chart above shows every period we have measured.
How do I connect Semiotic?
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 Semiotic need an API key?
No. Semiotic 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 Semiotic?
It answers our handshake in 265 ms on average, which is faster than 51% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
How many people use Semiotic?
The npm package semiotic was installed 10 878 times in the last week. Week over week that is -3%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Semiotic open source?
Yes — it is published under the Apache-2.0 licence, written in TypeScript and 2 690 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.