tampermonkey-mcp
MCP server that enables AI assistants to manage Tampermonkey userscripts via the Tampermonkey Editors browser extension, including listing, reading, creating, updating, and deleting scripts.
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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Tampermonkey
Source: Glama
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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.
These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.
tampermonkey_get_connection_codeREQUIRED FIRST STEP: Get the connection code to connect Tampermonkey Editors to the MCP server. **How it works:** The MCP server creates a WebSocket server that waits for Tampermonkey Editors to connect. You must call this tool FIRST to start the WebSocket server and get a c…
tampermonkey_listList all userscripts available in Tampermonkey. **Input:** - `pattern` (optional): Filter scripts by name pattern - `includePattern` (optional): Filter scripts by include URL pattern **Output:** Array of userscript metadata including: …
tampermonkey_getGet the content of a specific userscript. **Input:** - `path`: The script path (from list operation) - `ifNotModifiedSince` (optional): Unix timestamp - only return if script was modified after this time **Output:** - `value`: The script source c…
tampermonkey_patchUpdate the content of a userscript. **Input:** - `path`: The script or resource path (from list operation) - `value`: The new script content - `lastModified` (optional): Unix timestamp for optimistic locking **Output:** - `success`: t…
tampermonkey_putCreate a new userscript. **Input:** - `value`: The script source code content - `lastModified` (optional): Unix timestamp for optimistic locking **Output:** - `success`: true if script was created successfully - `path/name`: The path …
tampermonkey_deleteDelete a userscript by path. **Input:** - `path`: The script or resource path (<script-uuid>/source, <script-uuid>/storage or <script-uuid>/<external-resource-url>) **Output:** - `success`: true if script was deleted successfully - `error`: Error…
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse
ws: Memory exhaustion DoS from tiny fragments and data chunks
ws: Uninitialized memory disclosure
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
6/6 tools missing one or more hints — tampermonkey_get_connection_code (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); tampermonkey_list (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); tampermonkey_get (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +3 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.
Tool inputs are validated
5/6 tool handlers declare input schemas (83%)
Declare an inputSchema with zod/joi/yup on every tool definition.
License file
No license file
Add a LICENSE file (MIT, Apache-2.0, etc.).
Tool test coverage
Only 0/6 tools referenced in tests (0%)
Write tests that reference each tool by name so every tool has at least one test.
Production dependencies are patched
0 critical, 2 high severity in production deps — @modelcontextprotocol/sdk@1.25.3 (high), ws@8.18.3 (high)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
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