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About Sidemail MCP

Sidemail's MCP server exposes its email platform for transactional email delivery, contact and group management, templates, sending domains, Messenger drafts, inbound email, and API logs.

What you can use it for

  • Send and query transactional emails
  • Manage sending domains and DNS verification
  • Manage contacts, groups, templates, and Messenger drafts
  • Inspect inbound routes/received emails and API logs
  • Validate email addresses
Connection and setup
Hosting
both
Transport
Not documented
Endpoint
https://api.sidemail.io/mcp
Authentication
Hosted remote server uses an Authorization: Bearer Sidemail API key. Local package uses SIDEMAIL_API_KEY. API key must be stored in client secret storage or environment configuration.

Requirements

  • Sidemail account and API key
  • Node.js 20+ for local npm package

Setup steps

  1. Create an API key in Sidemail account settings.
  2. Remote-capable clients can connect to https://api.sidemail.io/mcp using Authorization: Bearer <API_KEY>.
  3. For local stdio, configure command `npx`, args `-y`, `@sidemail/mcp`, and env SIDEMAIL_API_KEY.
  4. Restart client and start with read-only listing or query actions. Do not test by sending a real email.
Tools 43

Current Sidemail official docs enumerate 43 tools across domains, projects, Messenger, groups, contacts, emails, email validation, templates, inbound email and API logs; stored names match. The hosted Streamable HTTP endpoint requires a Sidemail bearer API key; email send/delete and other write tools can change external state.

  • list-domains

    Sidemail list domains operation.

    01
  • create-domain

    Sidemail create domain operation.

    02
  • check-domain

    Sidemail check domain operation.

    03
  • setup-domain-mail-from

    Sidemail setup domain mail from operation.

    04
  • delete-domain

    Sidemail delete domain operation.

    05
  • get-project

    Sidemail get project operation.

    06
  • create-linked-project

    Sidemail create linked project operation.

    07
  • update-project

    Sidemail update project operation.

    08
  • delete-linked-project

    Sidemail delete linked project operation.

    09
  • list-messenger-drafts

    Sidemail list messenger drafts operation.

    10
  • get-messenger-draft

    Sidemail get messenger draft operation.

    11
  • create-messenger-draft

    Sidemail create messenger draft operation.

    12
  • update-messenger-draft

    Sidemail update messenger draft operation.

    13
  • delete-messenger-draft

    Sidemail delete messenger draft operation.

    14
  • list-groups

    Sidemail list groups operation.

    15
  • create-group

    Sidemail create group operation.

    16
  • update-group

    Sidemail update group operation.

    17
  • delete-group

    Sidemail delete group operation.

    18
  • create-or-update-contact

    Sidemail create or update contact operation.

    19
  • list-contacts

    Sidemail list contacts operation.

    20
  • query-contacts

    Sidemail query contacts operation.

    21
  • clean-contacts-batch

    Sidemail clean contacts batch operation.

    22
  • find-contact

    Sidemail find contact operation.

    23
  • delete-contact

    Sidemail delete contact operation.

    24
  • send-email

    Sidemail send email operation.

    25
  • query-emails

    Sidemail query emails operation.

    26
  • get-email

    Sidemail get email operation.

    27
  • delete-email

    Sidemail delete email operation.

    28
  • validate-email

    Sidemail validate email operation.

    29
  • list-templates

    Sidemail list templates operation.

    30
  • get-template

    Sidemail get template operation.

    31
  • create-template

    Sidemail create template operation.

    32
  • update-template

    Sidemail update template operation.

    33
  • list-template-gallery

    Sidemail list template gallery operation.

    34
  • list-template-fonts

    Sidemail list template fonts operation.

    35
  • list-inbound-routes

    Sidemail list inbound routes operation.

    36
  • create-inbound-route

    Sidemail create inbound route operation.

    37
  • update-inbound-route

    Sidemail update inbound route operation.

    38
  • delete-inbound-route

    Sidemail delete inbound route operation.

    39
  • list-received-emails

    Sidemail list received emails operation.

    40
  • get-received-email

    Sidemail get received email operation.

    41
  • query-api-request-logs

    Sidemail query api request logs operation.

    42
  • get-api-request-log-stats

    Sidemail get api request log stats operation.

    43
Limitations and notes
  • Tools can send emails, delete contacts/domains/templates, change project settings, and create inbound routes. Review and confirm external effects before execution.
  • Deep SMTP validation can consume validation credits.
  • No pricing/plan limitation assumed; service access depends on the Sidemail account.
Original sources
  • official tool reference

    Current Sidemail official docs enumerate 43 tools across domains, projects, Messenger, groups, contacts, emails, email validation, templates, inbound email and API logs; stored names match. The hosted Streamable HTTP endpoint requires a Sidemail bearer API key; email send/delete and other write tools can change external state.

  • official documentation or source

    Current Sidemail official docs enumerate 43 tools across domains, projects, Messenger, groups, contacts, emails, email validation, templates, inbound email and API logs; stored names match. The hosted Streamable HTTP endpoint requires a Sidemail bearer API key; email send/delete and other write tools can change external state.

Documentation checked 2026-10-28T13:45:00.000Z. Connection has not been runtime tested.

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