resend-mcp-server (199-mcp/mcp-send-email) is an MCP server listed on the M8ven Trust Index. It scores 67 out of 100, grade C. It declares 29 tools. No publisher has claimed this listing.

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C
Caution
67/100

resend-mcp-server

Complete MCP server for Resend API with all endpoints - send emails, manage domains, contacts, broadcasts, and more

→ 199-mcp/mcp-send-email· npm: resend-mcp-server· listed on npm

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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Who stands behind it

199-mcp

Source: npm

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Install from

npmscored separately

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.

// key findings
🚨
Secret credentials may flow to a network call
1 flow detected: RESEND_API_KEY. We can’t prove the destination matches the brand the credential belongs to.
⚠️
Known vulnerabilities in dependencies: 2 high
Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.
🔐
You'll be asked for 1 credential: RESEND_API_KEY
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// tools this server exposes29 tools

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.

send-email

Send an email using Resend

send-batch-emails

Send multiple emails in a single batch (up to 100 emails)

get-email

Retrieve information about a specific email

update-email

Update properties of an email (e.g., scheduled time)

cancel-email

Cancel a scheduled email

create-domain

Add a new sending domain to Resend

list-domains

List all domains in your Resend account

get-domain

Get details of a specific domain

update-domain

Update domain settings (tracking, TLS)

delete-domain

Remove a domain from your Resend account

verify-domain

Trigger domain verification

create-api-key

Create a new API key

list-api-keys

List all API keys in your account

delete-api-key

Delete an API key

create-audience

Create a new audience (contact list)

list-audiences

List all audiences in your account

get-audience

Get details of a specific audience

delete-audience

Delete an audience

create-contact

Add a contact to an audience

list-contacts

List all contacts in an audience

get-contact

Get details of a specific contact

update-contact

Update contact information

delete-contact

Delete a contact by ID or email

create-broadcast

Create an email broadcast for an audience

list-broadcasts

List all broadcasts

get-broadcast

Get details of a specific broadcast

send-broadcast

Send a broadcast immediately or schedule it

update-broadcast

Update a broadcast (only if created via API)

delete-broadcast

Delete a draft broadcast

// known CVEs in dependencies2 high

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

high@modelcontextprotocol/sdk@1.5.0GHSA-8r9q-7v3j-jr4g

Anthropic's MCP TypeScript SDK has a ReDoS vulnerability

high@modelcontextprotocol/sdk@1.5.0GHSA-w48q-cv73-mx4w

Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default

Depend on this server? Get alerted when its CVEs change.Watch this server free →
// 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.
configREPLY_TO_EMAIL_ADDRESSESDefault reply-to addresses (comma-separated)
🔐 secretRESEND_API_KEYYour Resend API key
configSENDER_EMAIL_ADDRESSDefault sender email
// 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

29/29 tools missing one or more hints — send-email (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); send-batch-emails (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get-email (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +26 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

25/29 tool handlers declare input schemas (86%)

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

Tests exist

No test files found

Add tests that exercise each declared tool.

Production dependencies are patched

0 critical, 2 high severity in production deps — @modelcontextprotocol/sdk@1.5.0 (high), @modelcontextprotocol/sdk@1.5.0 (high)

Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.

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 5 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
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commit: d4f3b05636f859a5a26153f0cec52dc852b5908d
code hash: c8d2c868008cb8c4950e73e5c91722748bdd4b879bcb0e0c50edfe5dc3dccba8
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