GET
Get transaction index time series
Premium — historical data. This endpoint requires the blended-index-history scope, granted separately from blended-index — a token can have current access without history. Contact david@compute-index.com to request access.
Officially administered series. Where General Index (GX) administers an index, this endpoint serves the GX-published value. That is currently hopper and blackwell at family level and h100 at GPU level, all in region_group=US; the set grows as further indices are listed.Rows served from GX differ in two ways: p5, p95 and txn_count are null, because GX publishes no envelope or transaction counts, and the values are not smoothed again on our side, because the GX series is already smoothed.Every other scope is unchanged — our own computation, EWMA-smoothed, with the full envelope. That covers h200, a100, b200 and b300, any family GX does not administer, and index_type=raw at every scope, which has no GX counterpart.A single response can therefore mix both. Read p5/p95/txn_count as optional rather than assuming either shape.
Time series at either granularity — gpu_family (defaults to hopper when neither is given) or gpu_group (both returns 400); see Current Index for the granularity and index_type rules. days_back is capped at 730; for a longer baseline use the Informational Index history, which has no cap.

Example

Authorizations

Authorization
string
header
required

Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Query Parameters

gpu_family
string | null

GPU family (e.g., hopper, blackwell). Mutually exclusive with gpu_group. Defaults to hopper when gpu_group is not given

gpu_group
string | null

GPU group for daily GPU-level indices (h100, h200, a100, b200, b300). Mutually exclusive with gpu_family

index_type
string
default:blended_sigmoid

Index type: blended_sigmoid, raw

region_group
string
default:US

Region group (US only at launch)

contract_type
string
default:combined

Contract type (combined only)

days_back
integer
default:365

Number of days to look back

Required range: 1 <= x <= 730

Response

Successful Response

Response for transaction index history time series

data
TxnIndexHistoryPoint · object[]
required
total_days
integer
required
gpu_family
string
required
index_type
string
required
filters
Filters · object
required
gpu_group
string | null

GPU group (e.g., h100) for daily GPU-level series; null for family-level