The MVAC Stack

Four layers every persistent agent needs — Memory, Vault, Activation, Communication — shipped as two products. What is this? →

M
Live

Memento Protocol

Memory

Structured working memory for AI agents. Facts, decisions, skip lists, decay, consolidation, semantic search. SaaS API — one command to install, free tier, no credit card.

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VAC
Live

Fathom

Vault + Activation + Communication

The persistent agent server. Obsidian-compatible workspace, ping scheduler, identity crystallization, inter-workspace messaging, shared rooms. Local MCP server.

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