GrayMatter
Rank #11,960io.github.ValkyrLabs/graymatter
Secure durable memory and bounded context for AI agents, with hosted OAuth and local Lite support.
What you can do with GrayMatter
GrayMatter is a Model Context Protocol (MCP) server published by ValkyrLabs. It ranks #11,960 of 152,076 active servers on MCP Toplist, and its repository has 3 GitHub stars. GrayMatter is listed on Official MCP, with 1 tracked version. It was first listed on Aug 27, 2026 and most recently updated on Oct 6, 2026.
Not verifiedMCP Toplist has not yet written a checked profile for this server, so the paragraph above is assembled from registry data only. The repository README is the authority on what it does.
What GrayMatter can and cannot do
Not verifiedMCP Toplist has not catalogued this server's tools or limitations. The repository README lists them.
What you need before using GrayMatter
The registry listing declares no required environment variables or authentication. This is declared metadata, not a verified install — the repository README is the authority.
MCP Toplist probed the public endpoint on Oct 19, 2026 and could not complete the MCP handshake (jsonrpc error). Requirements remain unverified.
Declared by the Official MCP Registry, last synced Oct 25, 2026. Not independently verified by MCP Toplist.
Hosted endpoint declared as public.
Connect GrayMatter and confirm it works
claude mcp add --transport http graymatter https://api-0.valkyrlabs.com/graymatter/mcp[mcp_servers.graymatter]
url = "https://api-0.valkyrlabs.com/graymatter/mcp"Add to ~/.codex/config.toml.
https://api-0.valkyrlabs.com/graymatter/mcpSettings → Connectors → “Add custom connector”, then paste this URL.
{
"mcpServers": {
"graymatter": {
"url": "https://api-0.valkyrlabs.com/graymatter/mcp"
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project).
{
"servers": {
"graymatter": {
"type": "http",
"url": "https://api-0.valkyrlabs.com/graymatter/mcp"
}
}
}Save as .vscode/mcp.json in your workspace.
{
"mcpServers": {
"graymatter": {
"serverUrl": "https://api-0.valkyrlabs.com/graymatter/mcp"
}
}
}Add to ~/.codeium/windsurf/mcp_config.json.
{
"mcpServers": {
"graymatter": {
"url": "https://api-0.valkyrlabs.com/graymatter/mcp"
}
}
}After adding the config, ask your client to list this server's tools. A tool list confirms the connection; an empty list or an error means the server did not start or needs credentials.
What changed, and when this was checked
- First listed
- Aug 27, 2026
- Latest version published
- Oct 6, 2026
- Version history
- 1 version tracked (below)
- Requirements evidence
- MCP Toplist probed the public endpoint on Oct 19, 2026 and could not complete the MCP handshake (jsonrpc error). Requirements remain unverified.
- Profile checked
- Not yet — purpose, capabilities and requirements above come from registry data only
- Ranking data as of
- Oct 6, 2026
- Official MCP ↗listed since Oct 6, 2026 · still listed
Do you maintain GrayMatter? to correct or enrich this profile.
Available versions (1)
| Version | Published |
|---|---|
| 0.3.3 | Oct 6, 2026 |
Ranks ahead of 140,116 of 152,076 servers on MCP Toplist.
Show your rank
Maintain this server? Add the live rank badge to your README — it updates automatically as the leaderboard changes.
[](https://mcptoplist.com/server/io.github.ValkyrLabs%2Fgraymatter)<a href="https://mcptoplist.com/server/io.github.ValkyrLabs%2Fgraymatter"><img src="https://mcptoplist.com/badge/io.github.ValkyrLabs%2Fgraymatter.svg" alt="MCP Toplist: Top 10% of 152,076" /></a>Variants: append ?metric=score or ?metric=stars to the image URL.
Frequently asked questions
- Who maintains GrayMatter?
- GrayMatter is maintained by ValkyrLabs, which publishes 1 MCP server (1 total version) tracked on MCP Toplist.
- Is GrayMatter listed on the Official MCP Registry?
- Yes — GrayMatter is listed on the Official MCP Registry.
- How many versions does GrayMatter have?
- MCP Toplist tracks 1 version of GrayMatter, most recently published on Oct 6, 2026.
- Where can I find the source code for GrayMatter?
- The source code for GrayMatter is hosted at github.com/ValkyrLabs/GrayMatter.
Do you run this server?
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