mac-bridge-mcp
An MCP server that runs on a Mac and exposes a small, sharp set of tools (shell, file transfer, binary execution, screenshots) over a token-protected network port.
Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
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IamLeandrooooo
Source: Glama
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Install from
The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
MCP_BRIDGE_HOSTWith the default =127.0.0.1, the server is reachable only fromMCP_BRIDGE_PORT8765 Listen port.MCP_BRIDGE_PATH/mcp URL path for the MCP endpoint.MCP_BRIDGE_TOKENexport ="$(python3 -c 'import secrets;print(secrets.token_urlsafe(32))')"MCP_BRIDGE_SHELL/bin/zsh Shell used by run_command.MCP_BRIDGE_ROOTunset Confine all file/binary operations under this directory.MCP_BRIDGE_ALLOW_IPSunset Comma-separated IPs/CIDRs allowed to connect. Unset = any IP (token still required).MCP_BRIDGE_TRUST_FORWARDEDunset Read client IP from X-Forwarded-For. ONLY behind a proxy you control.MCP_BRIDGE_TLS_CERTunset Path to a PEM certificate. Set with MCP_BRIDGE_TLS_KEY to serve HTTPS.MCP_BRIDGE_TLS_KEYMCP_BRIDGE_TLS_CERT unset Path to a PEM certificate. Set with to serve HTTPS.MCP_BRIDGE_TLS_KEY_PASSWORDunset Password for the private key, if it is encrypted.Tool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
7/7 tools missing one or more hints — system_info (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); run_command (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); run_binary (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +4 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Destructive tools are labelled
1 tool perform destructive updates without destructiveHint — screenshot deletes at line 368 (os.unlink(tmp_path))
Add destructiveHint:true to any tool whose handler calls .delete(), .upsert(), .update(), unlink, rm, DELETE, DROP, REPLACE INTO, or any operation that overwrites existing data.
Tool inputs are validated
5/7 tool handlers declare input schemas (71%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool handlers catch errors
Only 3/7 tool handlers wrap calls in try/catch (43%)
Wrap each tool handler body in try/catch and return a structured error response.
License file
No license file
Add a LICENSE file (MIT, Apache-2.0, etc.).
Tests exist
No test files found
Add tests that exercise each declared tool.
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