DirectoryMCP serversAI & agents

Semiotic: MCP server (AI & agents) in 2026

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

Verified working on 2026-10-27 Rank 10 of 192 in AI & agents. Source: MCP Registry record, checked 2026-10-27.

Key facts

TypeMCP server, remote (streamable HTTP)
CategoryAI & agents
Endpointhttps://semiotic-mcp-server-481507046413.us-west1.run.app/mcp
Registry nameio.github.nteract/semiotic
Version (registry)3.13.1
Published in registry2026-10-26
Registry record updated2026-10-26
Repositoryhttps://github.com/nteract/semiotic
Websitehttps://semiotic.nteract.io
AuthenticationNone needed for initialize and tools/list (checked anonymously)
Latest checkUp on 2026-10-27, 103 ms to initialize
Tools listed5
Checks passed1 of 1 daily checks
Last verified working2026-10-27
Sourcehttps://registry.modelcontextprotocol.io/v0/servers/io.github.nteract%2Fsemiotic/versions/latest (pulled 2026-10-27)

Tools (5)

createChart, improveChart, explainChart, auditChart, getChartSchema

Verification history

One probe a day: initialize, then tools/list, nothing else. Last 1 checks: 10-27 up

Install

Claude Code
claude mcp add --transport http semiotic https://semiotic-mcp-server-481507046413.us-west1.run.app/mcp
Claude (claude.ai, Desktop)

Settings > Connectors > Add custom connector. Name: Semiotic. URL: https://semiotic-mcp-server-481507046413.us-west1.run.app/mcp

Cursor
{
  "mcpServers": {
    "semiotic": {
      "url": "https://semiotic-mcp-server-481507046413.us-west1.run.app/mcp"
    }
  }
}

Save as ~/.cursor/mcp.json (all projects) or .cursor/mcp.json (this project).

ChatGPT

Settings > Connectors > Advanced > Developer mode, then Create. Name: Semiotic. MCP server URL: https://semiotic-mcp-server-481507046413.us-west1.run.app/mcp. Authentication: No authentication.

Custom connectors need a plan with Developer mode; menu names change between releases.

Hermes Agent
mcp_servers:
  semiotic:
    url: "https://semiotic-mcp-server-481507046413.us-west1.run.app/mcp"

Add to ~/.hermes/config.yaml, then run /reload-mcp.

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Semiotic: MCP server (AI & agents) in 2026 · Vibe Shipped