Gray Matter MCP Server
AI agents forget everything between sessions. GrayMatter gives them persistent memory, a self-building knowledge graph, and cuts context tokens by 90%.
People who work with persistent memory, self hosted and offline first and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in Go.
VERIFIED ACTIVE
LAST COMMIT 2026-09-07 · ★ 471 · #236 OF 304 MAINTAINED MEMORY · VERIFIED 2026-09-18
MIT · Go servers · how we verify → /methodology
01 · Evidence
Security posture
What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.
license MIT - declared in the repository
registry namespace io.github.angelnicolasc is GitHub-verified and matches the repo owner
02 · What Gray Matter can do
Prose above is summarized from the project's README and registry record - no invented capabilities.
Latest releases
v0.19.1 · 2026-09-07
GrayMatter v0.19.1 · Persistent memory for Go AI agents. Single binary. Zero infra. · Quick install · bash · go install github.com/angelnicolasc/graymatter/cmd/[email protected] · Prebuilt binaries for Linux, macOS…
v0.19.0 · 2026-09-07
GrayMatter v0.19.0 · Persistent memory for Go AI agents. Single binary. Zero infra. · Quick install · bash · go install github.com/angelnicolasc/graymatter/cmd/[email protected] · Prebuilt binaries for Linux, macOS…
v0.18.0 · 2026-08-28
GrayMatter v0.18.0 · Persistent memory for Go AI agents. Single binary. Zero infra. · Quick install · bash · go install github.com/angelnicolasc/graymatter/cmd/[email protected] · Prebuilt binaries for Linux, macOS…
03 · Who maintains Gray Matter
GrayMatter is maintained by angelnicolasc. It's the only MCP server we track from this author; the repo dates to Apr 2026.
04 · Facts
- repository
- github.com/angelnicolasc/graymatter
- category
- memory - ranked #236 of 304 actively-maintained memory servers as of 2026-09-18.
- release cadence
- 10+ releases in the last 90 days (latest 2026-09-07)
- registry
- io.github.angelnicolasc/graymatter (active, first published 2026-08-26 · 2 versions)
05 · Gray Matter FAQ
What is Gray Matter?
AI agents forget everything between sessions. GrayMatter gives them persistent memory, a self-building knowledge graph, and cuts context tokens by 90%.
Is Gray Matter still maintained?
Yes - as of 2026-09-18, its last commit was 2026-09-07 and it shipped 10+ releases in the last 90 days. We re-verify nightly.
06 · Alternatives to Gray Matter
Alternatives to Gray Matter
Maintained memory servers if Gray Matter isn't the fit.
- Codebase Memory Codebase knowledge graph for AI agents - 162 languages, sub-ms queries, 99% fewer tokens. ★ 43,715 · 2026-09-18
- Superlog Open-source agent that observes and fixes your application. Query logs, traces, metrics, incidents. ★ 1,449 · 2026-09-17
- Tradememory Protocol Tamper-evident decision audit trail and outcome-weighted memory for AI trading agents. ★ 1,419 · 2026-09-14
- Persome Local-first personal memory and model server for trusted MCP agents on macOS. ★ 1,322 · 2026-08-21
- Neo4j Memory MCP Neo4j Knowledge Graph Memory Server ★ 984 · 2026-09-09
- Projectmem Coding agent memory - one local MCP server for every project. Warns before repeating failed fixes. ★ 826 · 2026-09-15
Pairs well with
Servers that cover what Gray Matter doesn't - only shown when the pairing reason fits the companion.
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