I cannot add another agent
Agents are counted against your plan, the same as numbers.
Every plan includes as many agents as it includes numbers — 1, 3 or 5 — because a phone number routes to exactly one agent. A free account with no plan keeps one, so you can always build and test.
Free a slot#
Archiving an agent releases its slot, and nothing about it is lost. Open the agent you are not using and archive it; you can restore it later, as long as there is a free slot for it to come back into.
Or take a larger plan#
Standard includes three, Pro includes five. Both also raise your plan minutes and how many calls you can take at once.
NoteIf your plan has lapsed you keep every agent you already had — new ones are paused at one until you renew. Nothing you built was touched.