Returns current plan stats for the payer wallet: user_id, api_keys, plan, last_payment, payment_frequency, left_days, credits_left, plan_active. Use before subscribe to check if an active plan exists. 404 if no agent found. If plan_active is true, use the returned api_keys with x-api-key header to call any endpoint without MPP.

Returns current plan stats for the payer wallet: user_id, api_keys, plan, last_payment, payment_frequency, left_days, credits_left, plan_active. Use before subscribe to check if an active plan exists. 404 if no agent found. If plan_active is true, use the returned api_keys with x-api-key header to call any endpoint without MPP.