Retention analysis

GET https://amplitude.com/api/2/retention

This is the basic request format with all parameters.

Request Params

KeyDatatypeRequiredDescription
senullRequired. Full event for the start action. Supports two "event_type" values: "_new" for new users, and "_active" for all users.
renullRequired. Full event for the returning action. Supports one "event_type" value: "_all" for all events and “_active” for all active events.
rmnullOptional. The retention type: bracket, rolling, or n-day. Note that rolling implies unbounded retention. (Default: n-day, no need to call it explicitly).
rbnullOptional, but required if rm is set to bracket. The days within each bracket, formatted [0,4] (e.g. if your bracket was Day 0 - Day 4, the parameter value would be [0,5]).
startnullRequired. First date included in data series, formatted YYYYMMDD (e.g. "20141001").
endnullRequired. Last date included in data series, formatted YYYYMMDD (e.g. "20141004").
inullOptional. Either 1, 7, or 30 for daily, weekly, and monthly counts, respectively (default: 1).
snullOptional. Segment definitions (default: none). Full description.
gnullOptional. The property to group by (default: none)

RESPONSES

status: OK

{"data":{"series":[{"values":{"Sep 2021":[{"count":13,"outof":13,"incomplete":false},{"count":1,"outof":13,"incomplete":false},{"count":0,"outof":13,"incomplete":false},{"count":0,"outof":13,"incomplete":false},{"count":0,"outof":13,"incomplete":false},{"count":0,"outof":13,"incomplete":true},{"count":0,"outof":13,"incomplete":true}],"Aug 2021":[{"count":11,"outof":11,"incomplete":false},{"count":5,"outof":11,"incomplete":false},{"count":1,"outof":11,"incomplete":false},{"count":1,"outof":11,"incomplete":false},{"count":0,"outof":11,"incomplete":false},{"count":0,"outof":11,"incomplete":false},{"count":0,"outof":11,"incomplete":true},{"count":0,"outof":11,"incomplete":true}],"Jul 2021":[{"count":4,"outof":4,"incomplete":false},{"count":0,"outof":4,"incomplete":false},{"count":1,"outof":4,"incomplete":false},{"count":1,"outof":4,"incomplete":false},{"count":1,"outof":4,"incomplete":false},{"count":0,"outof":4,"incomplete":false},{"count":0,"outof":4,"incomplete":false},{"count":0,"outof":4,"incomplete":true},{"count":0,"outof":4,"incomplete":true}]},"dates":["Sep 2021","Aug 2021","Jul 2021"],"datetimes":["2021-09-01","2021-08-01","2021-07-01"],"combined":[{"count":25,"outof":25,"incomplete":false,"retainedSetId":null,"dropoffSetId":null},{"count":5,"outof":25,"incomplete":false,"retainedSetId":null,"dropoffSetId":null},{"count":1,"outof":25,"incomplete":false,"retainedSetId":null,"dropoffSetId":null},{"count":2,"outof":25,"incomplete":false,"retainedSetId":null,"dropoffSetId":null},{"count":1,"outof":25,"incomplete":false,"retainedSetId":null,"dropoffSetId":null},{"count":0,"outof":14,"incomplete":false,"retainedSetId":null,"dropoffSetId":null},{"count":0,"outof":6,"incomplete":false,"retainedSetId":null,"dropoffSetId":null},{"count":0,"outof":4,"incomplete":true,"retainedSetId":null,"dropoffSetId":null},{"count":0,"outof":4,"incomplete":true,"retainedSetId":null,"dropoffSetId":null}]}],"seriesLabels":[""],"seriesMeta":[{"segmentIndex":0,"eventIndex":0}]},"timeComputed":1643746579038,"wasCached":false,"cacheFreshness":"FRESH","novaRuntime":232,"novaRequestDuration":239,"novaCost":48,"throttleTime":2,"minSampleRate":1,"transformationIds":[],"backend":"novaV2","realtimeDataMissing":false,"timedOutRealtimeData":false,"partialMergedAndNewUserInformation":false,"prunedResult":false,"hitChunkGroupByLimit":false,"subcluster":6,"millisSinceComputed":4,"queryIds":["zY6GgWF6PU"]}