| FMRS | 66 / 100 · C | 75 / 100 · B |
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| Reliability | 9 / 20 | 12 / 20 |
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| Security and permissions | 14 / 20 | 16 / 20 |
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| Maintenance | 12 / 20 | 14 / 20 |
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| Documentation | 17 / 20 | 18 / 20 |
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| Setup experience | 14 / 20 | 15 / 20 |
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| Best for | - Hevy PRO users
- Fitness enthusiasts who want AI-assisted training analysis and planning
- Developers who want to integrate Hevy data into MCP clients like Claude Desktop, Codex, Cursor
| - Individuals or teams who prioritise privacy and offline operation and do not want data leaving the machine
- Users who share memory across multiple MCP clients such as Claude Code, Claude Desktop, Hermes Agent, OpenClaw, Cursor, Codex and Gemini CLI
- Scenarios that need encrypted storage, a hash-chained audit log and verifiable vault migration
- Users who want low-latency recall, a bundled embedding model and no extra LLM calls inside the memory layer
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| Not for | - Users without Hevy PRO subscription
- Users who need deletion capabilities (Hevy API does not expose delete endpoints)
- Users looking for official support (this is community-maintained, not affiliated with Hevy)
| - Users who need cloud multi-device sync or a hosted team memory service; moving between machines means locking the vault and copying the file
- Users who expect the server itself to run an LLM that extracts facts and decides what to remember; Compartment explicitly keeps no LLM inside and leaves that to the host model
- Users who cannot keep a passphrase safe or who need a recovery path if it is lost, since Compartment never generates a password, seed or recovery phrase
- Deployments that require network transports such as SSE or streamable-http; this server is stdio only and opens no ports
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| Required permissions | - Requires Hevy API key (`HEVY_API_KEY`)
- Can read and write Hevy data (workouts, routines, exercise templates, body measurements, etc.)
- Hosted endpoint validates the API key with Hevy on each request and forwards it as `api-key` header
| - Read and write the vault file under the user's home directory, by default ~/.compartment/memory.vault, and its sibling settings file
- Access the session directory holding the unlock credential (configurable with COMPARTMENT_SESSION_DIR), which also carries the shared embedding process's Unix socket
- Optionally use the macOS keychain (compartment unlock --keychain is an explicit opt-in, and it survives reboots)
- Write or merge an mcpServers entry into each MCP client's own configuration file, taking a byte-exact backup first
- Install a PostToolUse hook for Claude Code that captures memory files the agent writes
- Serve a read-only dashboard on 127.0.0.1 behind a one-time random URL token
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| Risks and side effects | - API key leakage risk: never put key in source control, URLs, logs, or screenshots.
- Mutation risk: create operations may produce duplicates on retry; update operations replace existing records.
- Privacy: local package enables telemetry by default (can be disabled), sending errors and metrics to external services.
- Dependency on third-party service: hosted endpoint relies on Cloudflare Worker, availability may vary.
- Tool confirmation: mutation tools may require client confirmation, but support varies by client.
| - A leaked passphrase means the encrypted content can be decrypted; Compartment generates no recovery phrase and cannot recover a lost passphrase
- Enabling the memory_unlock tool places the passphrase in the model's context, which is why it is off by default
- If a 2FA keyfile is lost, for example a USB stick, the vault cannot be opened even with the passphrase
- `export --plaintext` writes the vault as unencrypted JSONL, so that file must be handled carefully
- Memory content can come from untrusted sources; recall wraps memories with a notice that they are stored data and content can be marked quarantined, but the host agent must still treat memory as data to limit prompt-injection risk
- The capture hook and client integration write into the user's own settings files, although the implementation backs up and merges rather than replacing
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| Supported clients | Claude Desktop, Codex, Cursor, Antigravity | Claude Desktop, Claude Code, Hermes Agent, OpenClaw, Cursor, VS Code, Codex, Gemini CLI, Cline, Roo Code, Zed, OpenCode, LM Studio, AnythingLLM, BoltAI, Goose, Kiro |
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| Tools | 26 | 14 |
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