Mass Messages
Mass Message Chart
Returns a daily timeseries for mass (group) messages over a date window — one series of sent counts (group_messages.chart) and one series of $ purchased from those messages (group_messages_purchases.chart), each with the window total and the delta vs. the prior equal-length window. Aggregate chart view; for per-message rows use Mass Message Statistics. Requires permission api_mass_messages_read_chart.
https://public-api.buffmetrics.comGET/v1/{account_id}/mass-messages/chart
Bearer
Authorization
defaultAuthorizationBearer <token>Send your FansMetric API key as a Bearer token in the Authorization header.
In: header
Path Parameters
account_id*integerOnlyFans numeric account ID.
Query Parameters
start_datestringWindow start. Default 30 days ago, UTC.
YYYY-MM-DD HH:MM:SSor ISO 8601 (theTseparator is normalized to a space).end_datestringWindow end. Default end of today, UTC. Same format as
start_date.
curl --request GET "https://public-api.buffmetrics.com/v1/acct_XXXXX/mass-messages/chart?start_date=sample_start_date&end_date=sample_end_date" \
--header "Authorization: Bearer YOUR_API_KEY"Response
200{
"data":{
"group_messages":{
"chart":[
0:{
"date":"2026-05-09T00:00:00+00:00"
"count":50
}
1:{
"date":"2026-05-10T00:00:00+00:00"
"count":49
}
]
"total":1446
"delta":-41.4
}
"group_messages_purchases":{
"chart":[
0:{
"date":"2026-05-09T00:00:00+00:00"
"count":385.54
}
1:{
"date":"2026-05-10T00:00:00+00:00"
"count":282.56
}
]
"total":9469.9
"delta":-18.1
}
}
"_meta":{
"_credits":{
"used":1
}
"_rate_limits":{
"limit_minute":1000
"remaining_minute":999
"limit_day":50000
"remaining_day":49999
}
}
}