Supply Chain Tariff Risk

PEPIndex for Sourcing & Procurement Teams

PEPIndex gives supply-chain strategy teams a daily early-warning signal for tariff pressure — before announced rates become applied costs. Country-level exposure, HS-chapter granularity, and sector-level price impact are all available via the API.

The problem: announced rates are not applied rates

When a 145% tariff is announced on Chinese imports, procurement teams face a difficult question: will this rate actually apply to your product categories, your supplier countries, and your import timeline? Historical data shows the answer is often "not exactly."

The statutory-vs-applied gap — the difference between the headline tariff rate and the rate actually collected at the border — averages 20–40 percentage points across major tariff actions. PEPIndex tracks this gap daily using live USITC DataWeb data, so sourcing teams can model actual cost exposure rather than worst-case scenario rates.

What PEPIndex provides for supply-chain teams

Signal	Data	Update cadence
Country tariff exposure	Applied rates at HS-2 chapter level for 11 countries: CN, MX, CA, JP, KR, VN, TW, DE, GB, FR, IT	Monthly (USITC DataWeb)
Per-event sector impact	COICOP-3 sector price impact for each tariff event — Household Furnishings, Apparel, Food, Industrial, etc.	Every 6 hours (pipeline)
Statutory vs. applied gap	Announced rate minus actually-applied rate per event, in percentage points	Monthly (USITC)
Policy pressure score	Daily PEPI composite (0–100) — higher = more reversal/exemption pressure in the current environment	Every 6 hours
Federal Register linkage	EOs and proclamations linked to each tariff event, with effective dates	Daily (Federal Register API)

Key API endpoints for supply-chain use cases

GET /api/v1/tariff-rates — Applied rates by country, latest snapshot (Standard tier)
GET /api/v1/tariff-rates/detail?country=CN — Per-HS-2 chapter rates for a specific country (Standard)
GET /api/v1/events/{id}/sector-impact — COICOP-3 sector price impact for a tariff event (Standard)
GET /api/v1/events/{id}/economic-impact — Full tariff gap, CPI contribution, consumer incidence (Premium)
GET /api/v1/index — Daily composite PEPI score (Free)

Example: monitoring China HS-chapter exposure

A sourcing team tracking China import exposure can pull /api/v1/tariff-rates/detail?country=CN to get the current applied rate at each HS-2 chapter. Combined with /api/v1/events filtered to domain=trade&status=monitoring, they can identify which active threats might affect their product categories before the next procurement cycle.

The statutory_applied_gap field on each event shows, in percentage points, how much of the announced tariff has been reversed through exemptions and carve-outs — the critical input to landed-cost modeling.

Integration patterns

Daily alert webhook: Poll /api/v1/index or subscribe to alerts when the PEPI score crosses a threshold.
Sourcing dashboard: Embed live tariff rates via /api/v1/tariff-rates/detail for each country in your supplier network.
Procurement model input: Use applied_rate_final and statutory_applied_gap from event data to build realistic tariff-cost scenarios.
Snowflake integration: Query live tables directly from Snowflake via the PEPI Marketplace listing — no API polling required.

Get API access

Standard tier includes tariff rates, events, sector impact, and economic indicators.

Request API key View all endpoints →