Below are the rate limits by endpoint.  Limit is the number of API calls, period is seconds. API call with throw 429 error if limit is exceeded

        /v4/access, limit: 100, period: 900
        /v4/account, limit: 100, period: 900
        /v4/airings, limit: 1000, period: 60
        /v4/brands, limit: 50, period: 60
        /v4/celebrities, limit: 50, period: 60
        /v4/events, limit: 50, period: 60
        /v4/industries, limit: 50, period: 300
        /v4/metrics, limit: 10, period: 10
        /v4/metrics/tv, limit: 25, period: 10
        /v4/metrics/audience/airings, limit: 25, period: 10
        /v4/movies, limit: 50, period: 60
        /v4/networks, limit: 50, period: 60
        /v4/notifications, limit: 100, period: 60
        /v4/product-categories, limit: 50, period: 60
        /v4/products, limit: 50, period: 60
        /v4/shows, limit: 100, period: 60
        /v4/spots, limit: 150, period: 60
        /v4/users, limit: 50, period: 60
        /v4/planning, limit: 50, period: 60