Is the Cyanheads Reference Data MCP server down?

mcp-registry/io.github.cyanheads/reference-data-mcp-server · v0.1.17

Also listed as glama/cyanheads/-cyanheads/reference-data-mcp-server

As of 2026-10-17 05:34 UTC, the Cyanheads Reference Data MCP server is up with a Glimind reliability score of 83/100 (grade B). Over the last 30 days it answered 99.7% of Glimind's liveness checks. It had 3 outages in 90 days, with a median recovery of 14 minutes.

Countries, timezones, elements, constants, HTTP status codes, unit conversion, and MIME type lookup.

claude mcp add --transport http cyanheads-reference-data-mcp-server https://reference-data.caseyjhand.com/mcp

{
  "mcpServers": {
    "cyanheads-reference-data-mcp-server": {
      "type": "http",
      "url": "https://reference-data.caseyjhand.com/mcp"
    }
  }
}

Third-party server, listed as discovered. Review its source before installing.

Agent-readiness: A (99/100)

What to fix (1)

Get alerted

Get an email or webhook when this server's readiness drops by 10+ points, tool-poisoning text appears, or a tool breaks:

curl -X POST https://glimind.com/v1/subscriptions -H 'content-type: application/json' -d '{"tools":["mcp-registry/io.github.cyanheads/reference-data-mcp-server"],"email":"[email protected]"}'

Agents: watch_tool({"toolId": "mcp-registry/io.github.cyanheads/reference-data-mcp-server"}) over MCP.

Passed

• Every tool has a well-formed, typed input schema.
• Every tool and parameter is described.
• Every tool declares whether it is read-only or destructive.
• No tool-poisoning patterns (hidden characters, instruction overrides, concealment, secret access, tool shadowing).
• Compact tool list (~2,819 tokens).
• Tool names are unique and portable across clients.
• Speaks MCP 2025-06-18.
• 99.75% uptime over 30 days.
• No breaking contract changes in 30 days.

Largest tool definitions

• ref_element_search ~447 tokens
• ref_geo_search ~324 tokens
• ref_timezone_lookup ~311 tokens
• ref_timezone_convert ~307 tokens
• ref_unit_convert ~280 tokens

Static checks of the advertised tools/list (schema, descriptions, annotations, tool-poisoning patterns, names, size) plus observed protocol, uptime, latency and contract changes. Read-only: no tool is ever called. Weights: schema 15, docs 20, safety 15, efficiency 15, compatibility 15, protocol 5, reliability 10, stability 5. Token counts are estimates (~3.6 characters per token).

Operator? Fix these, then re-check live. Embed the readiness badge:

[![MCP agent-readiness](https://glimind.com/v1/readiness/badge/mcp-registry%2Fio.github.cyanheads%2Freference-data-mcp-server.svg)](https://glimind.com/server/mcp-registry%2Fio.github.cyanheads%2Freference-data-mcp-server?ref=badge)

<a href="https://glimind.com/server/mcp-registry%2Fio.github.cyanheads%2Freference-data-mcp-server?ref=badge"><img src="https://glimind.com/v1/readiness/badge/mcp-registry%2Fio.github.cyanheads%2Freference-data-mcp-server.svg" alt="MCP agent-readiness"></a>

.. image:: https://glimind.com/v1/readiness/badge/mcp-registry%2Fio.github.cyanheads%2Freference-data-mcp-server.svg
   :target: https://glimind.com/server/mcp-registry%2Fio.github.cyanheads%2Freference-data-mcp-server?ref=badge
   :alt: MCP agent-readiness

Tool-definition log

Glimind records every version of this server's tool definitions in a signed, append-only transparency log. Current manifest sha256:37dd7ba89f7dc059…, first seen 2026-10-17, included at leaf 1375 of 16,971. Version history · verify what your client received.

Tools (10)

• ref_constant_lookup
• ref_element_lookup
• ref_element_search
• ref_geo_lookup
• ref_geo_search
• ref_http_status
• ref_mime_type
• ref_timezone_convert
• ref_timezone_lookup
• ref_unit_convert

Compare: most reliable knowledge servers · most reliable search servers · most reliable data servers · most reliable other servers

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

{
  "mcpServers": {
    "glimind": {
      "type": "http",
      "url": "https://glimind.com/mcp"
    }
  }
}

FAQ

Is the Cyanheads Reference Data MCP server down right now?

As of 2026-10-17 05:34 UTC, the Cyanheads Reference Data MCP server is up with a Glimind reliability score of 83/100 (grade B). Over the last 30 days it answered 99.7% of Glimind's liveness checks. It had 3 outages in 90 days, with a median recovery of 14 minutes.

How many tools does Cyanheads Reference Data MCP server provide?

Cyanheads Reference Data MCP server advertises 10 tools, including ref_constant_lookup, ref_element_lookup, ref_element_search, ref_geo_lookup, ref_geo_search.

How do I install Cyanheads Reference Data MCP server?

Point your MCP client at this streamable-http endpoint: https://reference-data.caseyjhand.com/mcp

Is the Cyanheads Reference Data MCP server safe to connect to an AI agent?

Glimind scanned all 10 tool definitions for tool-poisoning patterns — hidden or invisible characters, instructions that override the model, concealment from the user, requests to read credential or MCP config files, conversation exfiltration and cross-tool shadowing — and found none. This checks what the server tells the model, not what its code does; review the source before granting access to sensitive data.

Operator of Cyanheads Reference Data MCP server?

Claim this listing to get the Verified operator marker, a remediation checklist and owner analytics, or embed the live badge from any of the tool pages above.

Status is an automated estimate from Glimind's liveness checks (handshake and tool listing only; no tool is ever called) and may lag or differ from your network. Glimind is not affiliated with this server or its operator. Operator? Request a correction or opt out at https://glimind.com/opt-out.