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GET
App start

Authorizations

Authorization
string
header
required

A project token (apsio_pt_v0...), which reads exactly one project, or an OAuth access token issued for the API, which reads what its user can. Access tokens issued for Apsio's MCP server are accepted only from the MCP server itself.

Path Parameters

projectId
string
required
Pattern: ^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$
Example:

"0192f3a4-0000-7000-8000-00000000a101"

Query Parameters

from
string<date-time>

Start of the time range, inclusive (RFC 3339). Defaults to the range end minus the default length.

Example:

"2026-10-01T00:00:00Z"

to
string<date-time>

End of the time range, exclusive (RFC 3339). Defaults to now.

Example:

"2026-10-08T00:00:00Z"

app_id
string

Only this app.

Pattern: ^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$
release
string

Only this release.

Maximum string length: 128
group_by
enum<string>
default:release

The breakdown; prewarmed splits iOS launches the system prewarmed (spec 8.1).

Available options:
release,
os_version,
device_model,
prewarmed,
none

Response

Start percentiles and histograms per app, type and group.

from
string
required

RFC 3339 time in UTC with up to nanosecond precision.

Example:

"2026-10-04T10:15:00.431000000Z"

to
string
required

RFC 3339 time in UTC with up to nanosecond precision.

Example:

"2026-10-04T10:15:00.431000000Z"

group_by
enum<string>
required
Available options:
release,
os_version,
device_model,
prewarmed,
none
groups
object[]
required