GMass
Powerful mail merge and cold email system for Gmail.
How to connect
What your agent can do
Connect GMass
Starter prompt
“Claude, use GMass to send a mail merge campaign to this list of leads and set up 3 automated follow-ups for non-repliers.”
About GMass
GMass provides an API for programmatically managing cold email campaigns, follow-ups, and lead lists directly within the Gmail ecosystem. It is a popular tool for sales reps and individual outbounders who want to leverage Gmail's deliverability while using powerful automation features. The API enables the creation of automated sequences, lead verification, and synchronization of campaign results.
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