GET
Get transaction index values on a specific date
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.
Returns the latest published value on or before as_of_date, so weekends and holidays resolve to the prior business day. Takes either gpu_family or gpu_group (both returns 400) — see Current Index for the granularity rules.

Example

Authorizations

Authorization
string
header
required

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

Query Parameters

as_of_date
string
required

Target date (YYYY-MM-DD). Example: 2025-06-15

index_type
string
default:blended_sigmoid

Index type: blended_sigmoid, raw

gpu_family
string | null

GPU family (e.g., hopper, blackwell). Mutually exclusive with gpu_group

gpu_group
string | null

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

region_group
string | null

Region group (US only at launch)

contract_type
string | null

Contract type (combined only)

Response

Successful Response

Response for current/as-of transaction index queries

data
TxnIndexDataPoint · object[]
required
total_count
integer
required
filters
Filters · object
required