First point, according to access level docs here there is heavy rate limiting on the apps that are in development stage.
Second, To fetch reports there are multiple endpoints that, such as ad account wise reports, campaign wise reports, ad wise reports, here is a link to the docs for Insights API
available params are :
- act_AD_ACCOUNT_ID/insights
- CAMPAIGN_ID/insights
- ADSET_ID/insights
- AD_ID/insights
Lastly, about rate limiting in marketing api. It is done as a sliding window method which means there is no actual track of number of requests per day or something, its just that a lot of requests in short amount of time is not allowed.
two things you can do are,
first see the response of api and if the response is ratelimit error, stop the request.
second, use batch requests
Here is a gist from troubleshooting guide on limits
Troubleshooting
Timeouts
The most common issues causing failure at this endpoint are too many requests and time outs:
On /GET or synchronous requests, you can get out-of-memory or timeout errors.
On /POST or asynchronous requests, you can possibly get timeout errors. For asynchronous requests, it can take up to an hour to complete a request including retry attempts. For example if you make a query that tries to fetch large volume of data for many ad level objects.
Recommendations
There is no explicit limit for when a query will fail. When it times out, try to break down the query into smaller queries by putting in filters like date range.
Unique metrics are time consuming to compute. Try to query unique metrics in a separate call to improve performance of non-unique metrics.
Rate Limiting
The Facebook Insights API utilizes rate limiting to ensure an optimal reporting experience for all of our partners. For more information and suggestions, see our Insights API Limits & Best Practices.