/v1/tacsi/weeklyTACSI Weekly Feed
Returns the latest published weekly TACSI cell for one entitled sector, plus up to 12 trailing weeks of history. TACSI is The Amilere Consumer Sector Index: an aggregate-only sector brand-health index. Every cell is k-anonymized (each published cohort holds at least 50 distinct entities) and perturbed with a Laplace differential-privacy mechanism at publication. No individual account value, handle, name, or id is ever returned. The exact cohort size is never disclosed, only a band such as "n >= 50". Access requires an institutional subscription: a Sector Feed (or the Full Database) for the sector. forwardSignal is a structured placeholder today: no projection is fabricated until a sector reaches sufficient archive depth.
Bearer token required. Institutional TACSI subscription (Sector Feed or Full Database) for the requested sector. Per-key rate limits apply.
Query Parameters
| Parameter | Type | Required | Description |
|---|---|---|---|
sector | string (slug) | Required | The sector slug from the GICS taxonomy, for example "beverages" or "apparel-accessories-luxury-goods". |
curl -X GET "https://api.amilere.com/v1/tacsi/weekly?sector=beverages" \
-H "Authorization: Bearer prism_YOUR_API_KEY"{
"sector": "beverages",
"periodEnd": "2026-07-12",
"indexValue": 104.7,
"delta": 0.8,
"pillars": {
"impact": 102.1,
"momentum": 106.4,
"presence": 103.0,
"reach": 101.5,
"sentiment": 105.2
},
"cohortBand": "n >= 100",
"methodologyVersion": "TACSI_M1",
"forwardSignal": {
"status": "pending_archive_depth",
"note": "Forward signal ships when this sector reaches sufficient archive depth. No projection is fabricated."
},
"history": [
{ "periodEnd": "2026-07-05", "indexValue": 103.9, "delta": 0.4, "pillars": { "impact": 101.8, "momentum": 105.9, "presence": 102.7, "reach": 101.2, "sentiment": 104.6 }, "cohortBand": "n >= 100", "methodologyVersion": "TACSI_M1" }
]
}Error Codes
Unauthorized
Missing, malformed, expired, or revoked API key.
Not Licensed
This feed is not licensed for your organization. Contact sales. Uniform for an unknown sector, an unlicensed sector, or an exclusivity lockout: coverage is never enumerable.
Not Published
No published weekly index for this sector yet.
Rate Limited
Per-key rate limit exceeded. Honour the Retry-After header.