Fastmail MCP Server (Jordonh18/fastmail-mcp-server) is an MCP server listed on the M8ven Trust Index. It scores 74 out of 100, grade C. It declares 132 tools. No publisher has claimed this listing.

Back to MCP Trust IndexM8ven
C
Emerging
74/100
2 months ago

Fastmail MCP Server

Enables AI assistants to read, send, and manage emails, calendars, and contacts in a Fastmail account via the JMAP protocol.

→ Jordonh18/fastmail-mcp-server· listed on glama

Emerging. No concerning findings. Grades remain capped until the project builds reputation through adoption. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

How we verified

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Who stands behind it

Jordonh18

Source: Glama

Is this your MCP?

Claim it to get a verified publisher badge, a free copy of our full audit findings, and direct contact for any high-priority issues we find. Or connect your repo for our deepest verification, Live Monitored: read-only, revoke anytime. What we access →

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Install from

Glama

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// key findings
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
✅
Open source with a license and README
Anyone can audit the code, the license is declared, and the publisher documents what it does.
🔐
You'll be asked for 1 credential: FASTMAIL_API_TOKEN
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
🔐 secretFASTMAIL_API_TOKEN"": "your-api-token-here"
// quality suggestions

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

132/132 tools missing one or more hints — list_calendars (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); list_calendars (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); list_calendars (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +129 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

30/45 tool handlers declare input schemas (67%)

Declare an inputSchema with zod/joi/yup on every tool definition.

Tool handlers catch errors

Only 0/45 tool handlers wrap calls in try/catch (0%)

Wrap each tool handler body in try/catch and return a structured error response.

Tool test coverage

82/132 tools referenced in tests (62%)

Write tests that reference each tool by name so every tool has at least one test.

Domain consistency

npm scope @jordonh19 doesn't match GitHub owner jordonh18

Use the same org name across GitHub, npm, and your homepage so users can verify the publisher.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 6 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Score](https://m8ven.ai/badge/mcp/jordonh18/fastmail-mcp-server)](https://m8ven.ai/mcp/jordonh18/fastmail-mcp-server)
Shows your grade and updates automatically. Prefer no grade? Append ?variant=verified to the badge URL.
commit: ec7e2f144052d4ae546962f061f63e77d079d62c
code hash: 8d957b7feb8b341118044a9f941d4470710257c61209cf43d43abd0a154eecd5
verified: 6/22/2026, 12:06:15 PM
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