MCPLow riskUnclaimed

GrayMatter

Secure durable memory and bounded context for AI agents, with hosted OAuth and local Lite support.

ValkyrLabsvalkyrlabs/graymatter★ 2Updated Oct 6, 2026

server.json

{
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "name": "io.github.ValkyrLabs/graymatter",
  "description": "Secure durable memory and bounded context for AI agents, with hosted OAuth and local Lite support.",
  "title": "GrayMatter",
  "repository": {
    "url": "https://github.com/ValkyrLabs/GrayMatter",
    "source": "github"
  },
  "version": "0.3.3",
  "websiteUrl": "https://github.com/ValkyrLabs/GrayMatter",
  "remotes": [
    {
      "type": "streamable-http",
      "url": "https://api-0.valkyrlabs.com/graymatter/mcp"
    }
  ],
  "_meta": {
    "io.modelcontextprotocol.registry/publisher-provided": {
      "authentication": {
        "authorizationServerMetadataUrl": "https://api-0.valkyrlabs.com/.well-known/oauth-authorization-server",
        "hostedAccountRequired": true,
        "protectedResourceMetadataUrl": "https://api-0.valkyrlabs.com/.well-known/oauth-protected-resource",
        "type": "oauth2"
      },
      "installationDocumentationUrl": "https://github.com/ValkyrLabs/GrayMatter/blob/main/docs/mcp-registry.md",
      "localLite": {
        "documentationUrl": "https://github.com/ValkyrLabs/GrayMatter/blob/main/docs/graymatter-light.md",
        "hostedAccountRequired": false,
        "installation": "Separate source or GrayMatter extension setup; this listing installs the hosted connection.",
        "registryPackagePublished": false
      },
      "publisher": {
        "name": "Valkyr Labs",
        "url": "https://github.com/ValkyrLabs"
      },
      "supportUrl": "https://github.com/ValkyrLabs/GrayMatter/issues"
    }
  }
}

Permissions

DeclaredDetected
Runs code—None
Installs—None
Runs install scripts—None
Networkapi-0.valkyrlabs.comapi-0.valkyrlabs.com
Needs credentialsNoneNone
Outside the workspace—None
Agent tools—None

Checks

Low risk · Nothing worth a warning was found.

Not reviewed by a person · Checked by rules; the model review is not switched on yet.

Versions

  1. #10.3.3latestOct 7, 2026