The Semiotic MCP server,
connected in one click.
Verified React chart generation: select, validate, repair, render, and inspect charts through MCP. Connect the official Semiotic MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
Add Semiotic to your AI in one minute
Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.
claude mcp add --transport http semiotic https://semiotic-mcp-server-481507046413.us-west1.run.app/mcpRun in your terminal, then restart Claude Code.
Semiotic · https://semiotic-mcp-server-481507046413.us-west1.run.app/mcp
What your AI can do with Semiotic
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “createChart”: Select, validate, diagnose, render, and prove a static-data Semiotic chart. This is the default public workflow.”
“Use “improveChart”: Diagnose a chart configuration, assess data fit, and propose repairs or variants.”
“Use “explainChart”: Return reader grounding: chart description, communicative intent, and navigable data structure.”
“Use “auditChart”: Run design diagnostics plus accessibility and mobile audits, returning prioritized structured findings.”
How secure is the Semiotic MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Semiotic holds up.
Security grade A
gate scanned 5 tools on Sep 21, 2026 for prompt injection and risky tool definitions — nothing to flag.
Official endpoint
Operated by Semiotic (nteract.io) at its documented MCP endpoint — not a third-party mirror or community re-host.
No sign-in needed
This server only exposes public data — no account and no credentials are involved when you connect.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If Semiotic adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick Semiotic
Choose Semiotic in the gate directory. No sign-in needed.
Use it anywhere
Semiotic's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools Semiotic exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
createChart — Select, validate, diagnose, render, and prove a static-data Semiotic chart. This is the default public workflow.
improveChart — Diagnose a chart configuration, assess data fit, and propose repairs or variants.
explainChart — Return reader grounding: chart description, communicative intent, and navigable data structure.
auditChart — Run design diagnostics plus accessibility and mobile audits, returning prioritized structured findings.
getChartSchema — Return canonical Semiotic prop-schema guidance for code editing and advanced configuration.
Who runs the Semiotic MCP server?
The Semiotic MCP server at a glance
https://semiotic-mcp-server-481507046413.us-west1.run.app/mcpQuestions, answered
Is there an official Semiotic MCP server?
Yes — Semiotic operates its own remote MCP server at semiotic-mcp-server-481507046413.us-west1.run.app. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect Semiotic to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick Semiotic in the directory. No account or sign-in is needed. From then on, Semiotic's tools are available in every client you've connected to gate.
Do I need to host anything?
No. Semiotic runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the Semiotic MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect Semiotic in minutes. No credit card required.
Connect more than just Semiotic
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up Semiotic in: Claude · Claude Code · ChatGPT · Cursor · VS Code