Creating a MyApi account takes a minute and does not require a credit card. Sign up, connect your first service with OAuth, and issue a scoped token that your agent can use straight away.
The point of MyApi is that your agents stop holding your credentials. Instead of pasting an API key into a config file that ends up in a repo, a backup and three agent sandboxes, you connect the service once and hand out a token that carries only the scopes you chose. If an agent misbehaves or a laptop goes missing, you revoke that token and nothing else changes.
A free account covers connecting services, minting tokens, per-agent limits, device approval and the full audit log, so you can see exactly what your agents did and when. Paid plans add higher usage allowances and team features; you can start on the free plan and move up later without reconnecting anything.