Lightning Memory MCP Server

Persistent memory for AI agents in the Lightning economy. AI agents spend sats over Lightning via L402 - but they can't remember what they bought. Every session starts from zero. Every vendor is a stranger. Every price is accepted at face value. An agent that paid 500 sats yesterday doesn't know if today's 5,000 sat invoice is a price spike or normal. Its README documents 6 tools, including memory_store, memory_query, memory_list.

People connecting memory tools to Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-03-25 · ★ 9 · #215 OF 259 MAINTAINED MEMORY · VERIFIED 2026-08-25

MIT · Python servers · how we verify → /methodology

01 · Install Lightning Memory

before you install - you'll need

Set PHOENIXD_PASSWORD before connecting.

Claude Code

claude mcp add singularityjason-lightning-memory -- uvx lightning-memory

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "singularityjason-lightning-memory": {
      "command": "uvx",
      "args": [
        "lightning-memory"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · 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.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

pypi package lightning-memory - check the name against the project README before installing (PyPI has no namespace ownership)

registry namespace io.github.singularityjason is GitHub-verified and matches the repo owner

03 · What Lightning Memory can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

What you can build

With this server connected, an agent can search by relevance (FTS5 + optional semantic search), list memories with type/time filters, edit content or metadata with audit trail, and sync with Nostr relays (push/pull).

The 6 tools it gives your agent

Extracted from the project's README - what lightning-memory lets an agent do.

memory_store: - Store a memory (transaction, vendor, preference, error, decision)
memory_query: - Search by relevance (FTS5 + optional semantic search)
memory_list: - List memories with type/time filters
memory_edit: - Edit content or metadata with audit trail
memory_sync: - Sync with Nostr relays (push/pull)
memory_export: - Export as NIP-78 Nostr events

04 · Who maintains Lightning Memory

lightning-memory is maintained by singularityjason. It's the only MCP server we track from this author; the repo dates to Feb 2026.

05 · Facts

repository: github.com/singularityjason/lightning-memory
category: memory - ranked #215 of 259 actively-maintained memory servers as of 2026-08-25.
registry: io.github.singularityjason/lightning-memory (active, first published 2026-03-04)
packages: pypi:lightning-memory

06 · Lightning Memory FAQ

Is Lightning Memory still maintained?

Yes - as of 2026-08-25, its last commit was 2026-03-25. We re-verify nightly.

What can Lightning Memory do?

How do I install Lightning Memory?

Run `uvx lightning-memory`. The README documents one environment variable (PHOENIXD_PASSWORD) to set first. Set PHOENIXD_PASSWORD before connecting. You can also paste the ready-made client config above.

Does Lightning Memory run locally?

Yes - it's a stdio server: it runs on your machine (via uvx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Lightning Memory

Alternatives to Lightning Memory

Maintained memory servers if Lightning Memory isn't the fit.

Pairs well with

Servers that cover what Lightning Memory doesn't - only shown when the pairing reason fits the companion.

More memory MCP servers · Rekindle · M3 Memory · Alphafold Sovereign MCP · Rmbr · Memex (stifler7)

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