imap-mcp-server (nikolausm/imap-mcp-server) is an MCP server listed on the M8ven Trust Index. M8ven has not graded it: we have no way to read this server ourselves. No publisher has claimed this listing.
A powerful Model Context Protocol (MCP) server for IMAP email integration with Claude
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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nikolausm
Source: Glama · also listed on npm, github_topic
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Install from
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Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
body-parser is vulnerable to denial of service when url encoding is used
IMAP_DOWNLOAD_DIRIMAP_MAX_UPLOAD_SIZEIMAP_SPAM_DOMAINSIMAP_UPLOAD_TTL_MSIMAP_WHITELIST_DOMAINSIPQUALITYSCORE_API_KEYPORTTool 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
40/40 tools missing one or more hints — imap_add_account (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); imap_update_account (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); imap_list_accounts (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +37 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 — imap_upload_file deletes at line 257 (fs.unlinkSync(entryPath))
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
37/40 tool handlers declare input schemas (93%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool handlers catch errors
Only 10/40 tool handlers wrap calls in try/catch (25%)
Wrap each tool handler body in try/catch and return a structured error response.
Tool test coverage
Only 11/40 tools referenced in tests (28%)
Write tests that reference each tool by name so every tool has at least one test.
Shell command execution
2 child_process calls — runs shell commands
Prefer library functions over shell-outs. If you must shell out, ensure all inputs are properly escaped.
Dependency freshness
1/17 production deps stale: turndown-plugin-gfm@2022-05-22 (4.2y)
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https://m8ven.ai/api/mcp/tool-check