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Compare MCP servers

Compare scores, permissions, risks, and fit in one decision-focused table.

DimensionSecond BrainOne memory layer, every AI tool.Hevy MCPManage your Hevy workout data from AI assistants via MCP.
FMRS57 / 100 · C77 / 100 · B
Reliability5 / 2012 / 20
Security and permissions10 / 2016 / 20
Maintenance14 / 2016 / 20
Documentation15 / 2018 / 20
Setup experience13 / 2015 / 20
Best for
  • Individual users needing shared persistent memory across multiple AI tools.
  • Developers who want to self-host a memory layer on Cloudflare's free tier.
  • Users prioritizing data privacy and control, as data stays in their own cloud account.
  • Users wanting a quick setup with complete ecosystem support (desktop app, CLI, extensions, etc.).
  • Hevy PRO users who want AI assistants to directly access their workout data
  • People who prefer using MCP clients like Claude, Cursor, Codex for fitness tracking
  • Anyone needing summaries and insights from their training data
Not for
  • Teams needing collaborative memory (currently single-user design).
  • Users wanting zero technical setup without touching Cloudflare (except desktop app).
  • Users requiring offline or local-only memory (depends on cloud services).
  • Strict compliance environments that require non-cloud infrastructure.
  • Users without a Hevy PRO subscription (API key required)
  • Users who want to use the server without an API key
  • Those needing delete workflows (Hevy API does not expose delete endpoints)
Required permissions
  • Requires a Cloudflare account to deploy the Worker and infrastructure.
  • Requires an AUTH_TOKEN (or password) to authorize all clients.
  • Supports OAuth 2.0 dynamic client registration; clients do not need to embed the token in configs.
  • For calendar, email, and Notion integrations, requires iCal links, app passwords, or Notion connection secrets.
  • Requires HEVY_API_KEY environment variable for Hevy API authentication
  • Can create, update, and replace workouts, routines, folders, templates, and body measurements via tools
  • Read operations can fetch workouts, routines, folders, templates, history, and user info
Risks and side effects
  • Self-hosting means you are responsible for maintenance and updates.
  • Data is stored on Cloudflare, subject to Cloudflare's privacy policy (though within your own account).
  • Free tier may have usage limits (e.g., vector index size).
  • If you forget your password, you must log into Cloudflare to reset; you might temporarily lose access to memories.
  • Deploying with incorrect parameters (e.g., Vectorize dimensions) can degrade search functionality.
  • API key can be misused if leaked; do not expose in URLs, logs, or screenshots
  • Create operations may produce duplicates on retry; update operations replace existing records
  • The server sends data to the Hevy API and may send telemetry to external services unless disabled
Supported clientsClaude, ChatGPT, Cursor, CodexClaude Desktop, Cursor, Codex, Antigravity
Tools826