Mailtrap vs Jmap MCP
A side-by-side look at the Mailtrap and Jmap MCP MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose Mailtrap for communication work as a local process; choose Jmap MCP for communication over a hosted endpoint. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose Mailtrap when
- You need dedicated capabilities in the Communication domain.
- You prefer a local stdio subprocess transport.
- You have the keys it needs:
MAILTRAP_API_TOKEN, MAILTRAP_ACCOUNT_ID, DEFAULT_FROM_EMAIL, MAILTRAP_SANDBOX_ID, MAILTRAP_TEST_INBOX_ID, MAILTRAP_ORGANIZATION_ID, MAILTRAP_ORGANIZATION_API_TOKEN. - You want tools like
send-email, batch-send-transactional-email, batch-send-bulk-email.
Choose Jmap MCP when
- You need dedicated capabilities in the Communication domain.
- You prefer a remote HTTP/SSE transport.
- Its auth model fits you: API key required.
- You have the keys it needs:
JMAP_SESSION_URL, JMAP_BEARER_TOKEN. - You want tools like
get_mailboxes, search_emails, get_emails.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Communication | Communication |
| Quality signal | 64/100 · Good | 60/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Remote HTTP/SSE |
| Auth | Not declared | API key required |
| Pricing | Not declared | BYOK (pay the provider) |
| Required env vars | MAILTRAP_API_TOKENMAILTRAP_ACCOUNT_IDDEFAULT_FROM_EMAILMAILTRAP_SANDBOX_IDMAILTRAP_TEST_INBOX_IDMAILTRAP_ORGANIZATION_IDMAILTRAP_ORGANIZATION_API_TOKEN | JMAP_SESSION_URLJMAP_BEARER_TOKEN |
| Verified owner | Community listing | Community listing |
| GitHub stars | 66 | 178 |
| Directory activity | 0 views 0 installs 0 upvotes | 2 views 0 installs 0 upvotes |
| Tools | 125 | 12 |
| Full listing | View Mailtrap | View Jmap MCP |
Tools & capabilities
Mailtrap tools 125
send-emailSend an email to your recipient email address using Mailtrap Email API. You can send emails to multiple recipients at once.batch-send-transactional-emailSend a batch of transactional emails in one Mailtrap API call. Shared fields go on `base`; per-recipient overrides go in `requests[]`. Each request must include `to`.batch-send-bulk-emailSend a batch of bulk emails (Mailtrap bulk-stream API) in one call. Shared fields go on `base`; per-recipient overrides go in `requests[]`. Each request must include at least one of `to`/`cc`/`bcc`.create-templateCreate a new email templatelist-templatesList the account's email templates with page-token pagination (`token`, `per_page`). Pages are offsets over the newest-first list, so after deleting templates list again from token 1 instead of continuing with the next token.get-templateGet a single email template by ID, including subject, category, and HTML/text body.update-templateUpdate an existing email templatedelete-templateDelete an existing email templatesend-sandbox-emailSend an email in sandbox mode to a test inbox without delivering to your recipientsbatch-send-sandbox-emailSend a batch of emails in sandbox mode to a test inbox in one Mailtrap API call. Shared fields go on `base`; per-recipient overrides go in `requests[]`. Requires `sandbox_id` or the MAILTRAP_SANDBOX_ID env var.get-sandbox-messagesGet list of messages from the sandbox test inboxshow-sandbox-email-messageShow sandbox email message details and content from the sandbox test inbox. Optionally include spam report (SpamAssassin score) and HTML analysis (client compatibility) for email testing workflows.- +113 more on the listing page
Jmap MCP tools 12
get_mailboxesList mailboxes/folders with their IDs, names, and metadata. **Call this first**search_emailsSearch emails with filters. **All filters are AND'd together.** Returns onlyget_emailsRetrieve specific emails by their IDs. Use `properties` to request only what youget_threadsGet email threads by their IDs. Thread IDs come from `get_emails` responsesget_email_changesGet IDs of emails created, updated, or destroyed since a previous state. Use theget_search_updatesGet changes within a previous search query since its `queryState`. Must use themark_emailsMark emails as read/unread or flagged/unflagged.move_emailsMove emails to a different mailbox. Use `get_mailboxes` to find the targetpatch_email_mailboxesAdd or remove selected mailbox memberships without replacing unspecifieddelete_emailsDelete emails permanently (cannot be undone). Prefer moving to Trash viasend_emailSend a new email. Requires either `textBody` or `htmlBody` (or both).reply_to_emailReply to an existing email. Automatically sets To/CC, Re: subject prefix, and
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
Mailtrap
{
"mcpServers": {
"mailtrap": {
"command": "npx",
"args": [
"-y",
"mcp-mailtrap"
],
"env": {
"MAILTRAP_API_TOKEN": "YOUR_MAILTRAP_API_TOKEN_HERE",
"MAILTRAP_ACCOUNT_ID": "YOUR_MAILTRAP_ACCOUNT_ID_HERE",
"DEFAULT_FROM_EMAIL": "YOUR_DEFAULT_FROM_EMAIL_HERE",
"MAILTRAP_SANDBOX_ID": "YOUR_MAILTRAP_SANDBOX_ID_HERE",
"MAILTRAP_TEST_INBOX_ID": "YOUR_MAILTRAP_TEST_INBOX_ID_HERE",
"MAILTRAP_ORGANIZATION_ID": "YOUR_MAILTRAP_ORGANIZATION_ID_HERE",
"MAILTRAP_ORGANIZATION_API_TOKEN": "YOUR_MAILTRAP_ORGANIZATION_API_TOKEN_HERE"
}
}
}
}
Jmap MCP
{
"mcpServers": {
"wyattjoh-jmap-mcp": {
"url": "https://api.fastmail.com/jmap/session"
}
}
}
Frequently asked questions
Mailtrap is categorized under Communication and uses a local stdio subprocess. Jmap MCP belongs to Communication and uses a remote HTTP/SSE transport. Pick Mailtrap for communication work and Jmap MCP for communication.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
Mailtrap has no declared pricing — check the project's own site. Jmap MCP is bring-your-own-key: usage is billed by the API provider you supply a key for. Auth: api key required. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add mailtrap and wyattjoh-jmap-mcp as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Mailtrap has a quality signal of 64/100 (Good) with 0 views, 0 installs and 66 GitHub stars. Jmap MCP has 60/100 (Good) with 2 views, 0 installs and 178 GitHub stars.