Advice on running multiple development environments when reliant on third-party APIs?

As our team expands, we're looking to move away from the simple staging/production setup and allow each dev to spin up an environment using docker, to run their branch. Problem is, we rely on numerous third-party APIs (for payment, search, etc) and for each, we have a staging and production account setup. Has anyone got solid advice on how to make this reliance on third-party APIs work with a multi-environment setup? We mock the libraries for testing, but that's only for very specific, predefined scenarios, rather than running E2E developer environments.