The agent you have
It does not have to be ours. If it can call an API, it can run a campaign and write back when someone answers. A chat, Cowork, and Grok are the same kind of caller.
API
Connect the agent you already use.
Claude, Grok, Cowork, a chat, OpenClaw, Hermes, or whatever is running the work next month. The API is how it reaches Entrance: send the campaign, read the reply, and leave the thread in the same workspace.
How it works
One key. The send and the answer.
The workspace you have
Campaigns, messages, and the reply stay together. A person on the team can take a thread the agent has not claimed.
The docs are the contract
The same catalog is there for a person and for the agent. It says which call comes first, so the agent does not have to guess.