sibyl-memory-mcp 0.1.0

MCP server for Sibyl Memory Plugin — wraps the local SQLite + FTS5 memory engine and exposes it to MCP-compatible agents (Claude Code, Codex, Cursor, Continue, anything that speaks MCP).

sibyl-memory-mcp

MCP server for Sibyl Memory Plugin. Exposes the local SQLite + FTS5 memory engine to any MCP-compatible agent: Claude Code, Codex CLI, Cursor, Continue, anything that speaks Model Context Protocol.

Install

pip install sibyl-memory-mcp

You also need an activated Sibyl Memory account. If you haven't already:

sibyl init

This creates ~/.sibyl-memory/credentials.json (server-issued, HMAC-signed) and a local SQLite database at ~/.sibyl-memory/memory.db. The MCP server reads both automatically.

Add to Claude Code

Edit ~/.claude/settings.json (global) or .mcp.json (project-local):

{
  "mcpServers": {
    "sibyl-memory": {
      "command": "sibyl-memory-mcp"
    }
  }
}

Restart Claude Code. The 8 memory tools (prefixed memory_*) become available immediately.

Add to Codex CLI

Edit ~/.codex/config.toml:

[[mcp_servers]]
name = "sibyl-memory"
command = "sibyl-memory-mcp"

Restart Codex.

Tools exposed

Tool	What it does
memory_remember	Store an entity by (category, name)
memory_recall	Read an entity by exact key
memory_search	FTS5 search across all entities
memory_list	List entities in a category
memory_forget	Archive an entity (recoverable)
memory_set_state	Write a HOT-tier state doc
memory_get_state	Read a HOT-tier state doc
memory_record_event	Append a COLD-tier journal event

Full docs at docs.sibyllabs.org/memory/integrations.

Environment overrides

Var	Default	What it overrides
SIBYL_MEMORY_DB	~/.sibyl-memory/memory.db	Local SQLite path
SIBYL_CREDENTIALS	~/.sibyl-memory/credentials.json	Credentials file path

Tier behavior

• Free tier: 8 tools work. Hard-capped at 2 MB of local storage. Writes that would push past the cap return CAP_EXCEEDED with an upgrade_url. Self-learning and memory-check-up tools are not exposed on free tier.
• Paid tiers (Sync / Stake / Lifetime / Enterprise): cap removed. All tools enabled.

The cap-gate runs against the server-authoritative tier (verified via HMAC-signed credentials) — the MCP server can't bypass it by editing the local file.

License

MIT — same as the rest of the sibyl-memory-* family.