Lexicon MCP

An AI prompt library and manager for macOS with a built-in MCP server. Organize, template, and trigger your best prompts straight from Claude.

$1.99/mo

PlatformmacOS 14+

StorageSQLite · local

ProtocolMCP · Claude

TelemetryNone

Access$1.99 / month

01 / 03

---

What it does.

01

Prompt library

Every prompt, versioned and searchable in one place.

02

Template variables

Parameterize prompts; fill the blanks at call time.

03

Smart collections

Auto-group prompts by tag, use, or project.

04

Slash commands

Trigger any prompt from Claude Desktop and Claude Code.

---

Wired to Claudethrough MCP.

Lexicon ships a Model Context Protocol server. Connect it once and trigger any prompt — variables filled — straight from the conversation.

▸ Slash commands in Claude Desktop & Code

▸ Template variables resolved at call time

▸ Local-only — prompts never leave your Mac

claude — mcp · lexicon

› claude mcp add lexicon

connecting to local server …

✓ registered · 0 cloud calls

› /review-pr lang=swift focus=perf

resolving template @ ~/lexicon.db

→ 3 variables filled · prompt ready

› █

---

Building a Prompt Library Organize, template, and reuse your best prompts — local-only storage.

Code Review Prompts Variables for language, framework, and focus; trigger as slash commands.

AI Writing Workflows Editing, tone, and drafting prompts, consistent across audiences.

Data Analysis Prompts Reusable templates for source, output format, and chart styling.