Crystal

io.github.EraHQ/crystalVersion 1.0.0

Self-curating memory your AI tools share: provenance, verified citations, and trust tiers.

Status

Sign-in required304 msNov 14, 2026, 14:37 UTCReachable. It asks for authorization, so we did not look inside.

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Data from the official MCP Registry, checked by run.zero. How we check

Streamable HTTP

https://crystal-api-118881845105.us-east5.run.app/mcpSign-in required304 msNov 14, 2026, 14:37 UTC

OAuth sign-in

This server asks for sign-in. Your client opens the sign-in when it connects.

claude mcp add --transport http crystal https://crystal-api-118881845105.us-east5.run.app/mcp

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Settings > Connectors > Add custom connector
Name: crystal
Remote MCP server URL: https://crystal-api-118881845105.us-east5.run.app/mcp

{
  "mcpServers": {
    "crystal": {
      "url": "https://crystal-api-118881845105.us-east5.run.app/mcp"
    }
  }
}

code --add-mcp '{"name":"crystal","type":"http","url":"https://crystal-api-118881845105.us-east5.run.app/mcp"}'

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Registry status: Active
Published: Sep 28, 2026
Updated: Sep 28, 2026
Website: https://crystal.erahq.ai/⁠ (opens in a new tab)
Repository: Not given
Categories (suggested): Knowledge and notesSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared