Docs
Two readers, one page
A business owner deciding whether to use this, and an agent about to call its API. Pick one.
Running your own outreach
MastroSDR finds businesses that fit your trade and place, writes a personalized email to each one, and sends timed follow-ups. You read every email before it sends, unless you issue a key with sending turned on.
When somebody replies asking for time, MastroSDR can propose slots and book the meeting once you turn that on in Settings. MastroSDR tracks every reply and bounce automatically, across every connected mailbox.
An address on your do-not-contact list stays there. Nobody, including you, can take it off.
Pointing an agent at it
Hand your own agent a link and a key and it can run outreach here without you driving it: finding prospects, drafting, and queuing what it writes for review. Sending is a separate permission your agent has to be granted deliberately.
Hand this to your agent
One link and a key. Covers what to call first, the order to call things in, and how to connect Claude, ChatGPT, Claude Code and anything else that speaks MCP.
Point your own agent at itAPI reference
Every endpoint, every scope, and the machine-readable OpenAPI spec a model can read before it holds a key.
Read the API reference