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mcp

com.twelvedata/mcp

Twelve Data MCP: real-time & historical market data (stocks, crypto, forex, etc).

Finance

Findings

  • (connection) · transport

    Streamable HTTP error: Error POSTing to endpoint: {"type":"https://developers.cloudflare.com/support/troubleshooting/http-status-codes/cloudflare-5xx-errors/error-521/","title":"Error 521: Web server is down","status":521,"detail":"Cloudflare attempted to connect to the origin web server, but the connection was refused. The origin is down, blocking Cloudflare IPs, or not accepting connections on the configured port.","instance":"a2ffde6d7c50d476","error_code":521,"error_name":"origin_down","erro

Check history

updated 16d ago·re-checked weekly

DateGradeErrorsWarnings
2026-08-24unreachable——
2026-08-17auth required——
2026-08-10auth required——
2026-08-03auth required——
2026-07-27auth required——

Graded by connecting to the live server and validating every tool schema. Grades re-run on every sync. Findings and grades are never editable by the publisher.

Related servers

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Kick the tires on your own server: run a check

Grade
–

Not graded: unreachable on the last check.

How grading works

Install

Claude Code (remote)

claude mcp add --transport http com-twelvedata-mcp https://mcp.twelvedata.com/mcp

Endpoint (streamable HTTP)

https://mcp.twelvedata.com/mcp

Verify it yourself

npx tirekick check https://mcp.twelvedata.com/mcp
Links
  • MCP registry entry
  • Your server? Claim this listing