SERVER

Lex

Rank #8,099

dev.smartergpt/lex

Episodic memory, Frames, Policy Neighborhoods, and policy enforcement for AI agents.

19 versions

by guffawaffle (2 servers)View repository ↗

First listed

Nov 2, 2025

Last publish date

Oct 20, 2026

PURPOSE

What you can do with Lex

Lex is a Model Context Protocol (MCP) server published by guffawaffle. It ranks #8,099 of 168,415 active servers on MCP Toplist. Lex is listed across 2 registries — Official MCP and PulseMCP, with 19 tracked versions. It was first listed on Nov 2, 2025 and most recently updated on Oct 20, 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.

CAPABILITIES AND LIMITATIONS

What Lex can and cannot do

Not verifiedMCP Toplist has not catalogued this server's tools or limitations. The repository README lists them.

REQUIREMENTS

What you need before using Lex

DeclaredNo credentialsNo credentials declared

The registry listing declares no required environment variables or authentication. This is declared metadata, not a verified install — the repository README is the authority.

Declared by the Official MCP Registry, last synced Nov 4, 2026. Not independently verified by MCP Toplist.

Declared in the registry install config

LEX_WORKSPACE_ROOT · optional
LEX_STORE · optional
LEX_DB_PATH · optional
LEX_MEMORY_DB · optional
LEX_DATABASE_URL · optional
LEX_POSTGRES_PASSWORD · optional
LEX_POSTGRES_POOL_MAX · optional
LEX_DEBUG · optional

INSTALLATION AND FIRST TASK

Connect Lex and confirm it works

npm package

claude mcp add lex -e "LEX_WORKSPACE_ROOT=<your LEX_WORKSPACE_ROOT>" -e "LEX_STORE=<your LEX_STORE>" -e "LEX_DB_PATH=<your LEX_DB_PATH>" -e "LEX_MEMORY_DB=<your LEX_MEMORY_DB>" -e "LEX_DATABASE_URL=<your LEX_DATABASE_URL>" -e "LEX_POSTGRES_PASSWORD=<your LEX_POSTGRES_PASSWORD>" -e "LEX_POSTGRES_POOL_MAX=<your LEX_POSTGRES_POOL_MAX>" -e "LEX_DEBUG=<your LEX_DEBUG>" -- npx -y @smartergpt/lex-mcp

Replace each placeholder with your own value before saving.

npm package

[mcp_servers.lex]
command = "npx"
args = ["-y", "@smartergpt/lex-mcp"]

[mcp_servers.lex.env]
LEX_WORKSPACE_ROOT = "<your LEX_WORKSPACE_ROOT>"
LEX_STORE = "<your LEX_STORE>"
LEX_DB_PATH = "<your LEX_DB_PATH>"
LEX_MEMORY_DB = "<your LEX_MEMORY_DB>"
LEX_DATABASE_URL = "<your LEX_DATABASE_URL>"
LEX_POSTGRES_PASSWORD = "<your LEX_POSTGRES_PASSWORD>"
LEX_POSTGRES_POOL_MAX = "<your LEX_POSTGRES_POOL_MAX>"
LEX_DEBUG = "<your LEX_DEBUG>"

Add to ~/.codex/config.toml. Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "lex": {
      "command": "npx",
      "args": [
        "-y",
        "@smartergpt/lex-mcp"
      ],
      "env": {
        "LEX_WORKSPACE_ROOT": "<your LEX_WORKSPACE_ROOT>",
        "LEX_STORE": "<your LEX_STORE>",
        "LEX_DB_PATH": "<your LEX_DB_PATH>",
        "LEX_MEMORY_DB": "<your LEX_MEMORY_DB>",
        "LEX_DATABASE_URL": "<your LEX_DATABASE_URL>",
        "LEX_POSTGRES_PASSWORD": "<your LEX_POSTGRES_PASSWORD>",
        "LEX_POSTGRES_POOL_MAX": "<your LEX_POSTGRES_POOL_MAX>",
        "LEX_DEBUG": "<your LEX_DEBUG>"
      }
    }
  }
}

Add to claude_desktop_config.json (Settings → Developer → Edit Config). Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "lex": {
      "command": "npx",
      "args": [
        "-y",
        "@smartergpt/lex-mcp"
      ],
      "env": {
        "LEX_WORKSPACE_ROOT": "<your LEX_WORKSPACE_ROOT>",
        "LEX_STORE": "<your LEX_STORE>",
        "LEX_DB_PATH": "<your LEX_DB_PATH>",
        "LEX_MEMORY_DB": "<your LEX_MEMORY_DB>",
        "LEX_DATABASE_URL": "<your LEX_DATABASE_URL>",
        "LEX_POSTGRES_PASSWORD": "<your LEX_POSTGRES_PASSWORD>",
        "LEX_POSTGRES_POOL_MAX": "<your LEX_POSTGRES_POOL_MAX>",
        "LEX_DEBUG": "<your LEX_DEBUG>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project). Replace each placeholder with your own value before saving.

npm package

{
  "servers": {
    "lex": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@smartergpt/lex-mcp"
      ],
      "env": {
        "LEX_WORKSPACE_ROOT": "<your LEX_WORKSPACE_ROOT>",
        "LEX_STORE": "<your LEX_STORE>",
        "LEX_DB_PATH": "<your LEX_DB_PATH>",
        "LEX_MEMORY_DB": "<your LEX_MEMORY_DB>",
        "LEX_DATABASE_URL": "<your LEX_DATABASE_URL>",
        "LEX_POSTGRES_PASSWORD": "<your LEX_POSTGRES_PASSWORD>",
        "LEX_POSTGRES_POOL_MAX": "<your LEX_POSTGRES_POOL_MAX>",
        "LEX_DEBUG": "<your LEX_DEBUG>"
      }
    }
  }
}

Save as .vscode/mcp.json in your workspace. Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "lex": {
      "command": "npx",
      "args": [
        "-y",
        "@smartergpt/lex-mcp"
      ],
      "env": {
        "LEX_WORKSPACE_ROOT": "<your LEX_WORKSPACE_ROOT>",
        "LEX_STORE": "<your LEX_STORE>",
        "LEX_DB_PATH": "<your LEX_DB_PATH>",
        "LEX_MEMORY_DB": "<your LEX_MEMORY_DB>",
        "LEX_DATABASE_URL": "<your LEX_DATABASE_URL>",
        "LEX_POSTGRES_PASSWORD": "<your LEX_POSTGRES_PASSWORD>",
        "LEX_POSTGRES_POOL_MAX": "<your LEX_POSTGRES_POOL_MAX>",
        "LEX_DEBUG": "<your LEX_DEBUG>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json. Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "lex": {
      "command": "npx",
      "args": [
        "-y",
        "@smartergpt/lex-mcp"
      ],
      "env": {
        "LEX_WORKSPACE_ROOT": "<your LEX_WORKSPACE_ROOT>",
        "LEX_STORE": "<your LEX_STORE>",
        "LEX_DB_PATH": "<your LEX_DB_PATH>",
        "LEX_MEMORY_DB": "<your LEX_MEMORY_DB>",
        "LEX_DATABASE_URL": "<your LEX_DATABASE_URL>",
        "LEX_POSTGRES_PASSWORD": "<your LEX_POSTGRES_PASSWORD>",
        "LEX_POSTGRES_POOL_MAX": "<your LEX_POSTGRES_POOL_MAX>",
        "LEX_DEBUG": "<your LEX_DEBUG>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

First successful task

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.

ALTERNATIVES

When to choose another server

Other servers by guffawaffle

AXF#10,487

View all guffawaffle servers →

No task-specific alternatives are catalogued for Lexyet; the list above is its publisher's other servers.

MAINTENANCE AND EVIDENCE

What changed, and when this was checked

First listed: Nov 2, 2025
Latest version published: Oct 20, 2026
Version history: 19 versions tracked (below)
Requirements evidence: Declared by the Official MCP Registry, last synced Nov 4, 2026. Not independently verified by MCP Toplist.
Profile checked: Not yet — purpose, capabilities and requirements above come from registry data only
Ranking data as of: Oct 20, 2026

Registry sightings

Official MCP ↗listed since Apr 25, 2026 · still listed
PulseMCP ↗listed since May 22, 2026 · still listed
Official MCP ↗listed since Jul 24, 2026 · still listed

Do you maintain Lex? to correct or enrich this profile.

VERSIONS

Available versions (19)

Version	Published
4.4.4	Oct 20, 2026
4.4.3	Oct 20, 2026
4.4.2	Oct 20, 2026
4.4.1	Sep 18, 2026
4.4.0	Sep 17, 2026
4.3.0	Sep 17, 2026
4.2.0	Sep 5, 2026
4.1.0	Sep 5, 2026
4.0.4	Aug 29, 2026
4.0.3	Aug 28, 2026
3.0.1	Jul 21, 2026
3.0.0	Jul 19, 2026
2.10.0	Jul 17, 2026
2.9.1	Jul 16, 2026
2.8.0	Jul 11, 2026
2.1.2	Feb 1, 2026
1.0.2	Dec 31, 2025
1.0.1	Dec 31, 2025
0.1.0	Nov 25, 2024

STANDING

#8,099of 168,415 active serversTop 5%

Ranks ahead of 160,316 of 168,415 servers on MCP Toplist.

BADGE

Show your rank

Maintain this server? Add the live rank badge to your README — it updates automatically as the leaderboard changes.

Markdown

[![MCP Toplist](https://mcptoplist.com/badge/dev.smartergpt%2Flex.svg)](https://mcptoplist.com/server/dev.smartergpt%2Flex)

HTML

<a href="https://mcptoplist.com/server/dev.smartergpt%2Flex"><img src="https://mcptoplist.com/badge/dev.smartergpt%2Flex.svg" alt="MCP Toplist: Top 5% of 168,415" /></a>

Variants: append ?metric=score or ?metric=stars to the image URL.

FAQ

Frequently asked questions

Who maintains Lex?: Lex is maintained by guffawaffle, which publishes 2 MCP servers (30 total versions) tracked on MCP Toplist.
Is Lex listed on the Official MCP Registry?: Yes — Lex is listed on the Official MCP Registry, alongside PulseMCP.
How many versions does Lex have?: MCP Toplist tracks 19 versions of Lex, most recently published on Oct 20, 2026.
Where can I find the source code for Lex?: The source code for Lex is hosted at github.com/guffawaffle/lex.

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