account_statusLABSCO SUMMARY
diagnose_failed_send is the tool that answers the only question anyone asks about transactional email.
Nobody investigates a successful send. The failures — bounced, suppressed, rejected by DKIM, held by a filter — are where the time goes, and they normally mean reading logs across two systems. A dedicated diagnostic tool is the right thing to build. Note the domain verification prerequisite: without it nothing sends, and that is an infrastructure task rather than a config one.
What it is
Mailchimp's endpoint for their transactional product, Mandrill. Rather than a tool per endpoint it exposes the API itself, plus a diagnostic tool for the question people actually ask.
What you get
- call_api, describe_api, list_api — the transactional API, discoverable and callable
- build_template — construct a template
- diagnose_failed_send — work out why a message did not arrive
- Account status and integration guidance
Requirements
A Transactional API key and a verified sending domain. If the key is restricted, it needs the AI Agents permission group.
Setup effort
Paste a URL with a key — add the endpoint to your client
USE CASES
01
Working out why a message did not arrive
Run the diagnosis rather than piecing it together from logs.
02
Calling the API without a client library
Describe the endpoint, then call it.
03
Building a template
Construct it from the conversation rather than the template editor.
9 tools
Listed in project docs. Your client may show a different list.
build_templatecall_apidescribe_apidiagnose_failed_sendintegrate_apilist_apionboardingsubmit_feedbackBEFORE YOU INSTALL
What to know first
Tools you get
9 tools named in the project's documentation.
Requires
- an MCP client that can reach a remote endpoint
- A bearer Transactional API key; a restricted key must have the AI Agents permission group enabled
INSTALLATION
Connect your client
Add the endpoint to your client.
Server setup
ENDPOINT URL
https://mandrillapp.com/mcpRequirements
- A bearer Transactional API key; a restricted key must have the AI Agents permission group enabled
