How can I call api to get all tasks and datatype of input and output tasks?

do you want to fetch all the registered tasks from a particular project-domain?

Flyteremote.client

@tall-lock-23197 Yes, my app want to show all the registered tasks and task informations such as datatype of input, output. Call api to do that?

you should be able to use this: https://github.com/flyteorg/flytekit/blob/b3f0c408188c4e240a9c593b7a8c734a7ddc6405/flytekit/clients/friendly.py#L122 (you need to access the flyte remote client; example: https://github.com/flyteorg/airflow-provider-flyte/blob/bb5d94e7492869f0c0795cdf5a9a87335614b355/flyte_provider/hooks/flyte.py#L278)