---
title: "\"What Changed\" — recent movements in Silicon Analysts data over a 7d/30d window, derived from the daily snapshot ledger."
method: GET
path: "/api/v1/changes"
tags: ["feeds"]
---

# "What Changed" — recent movements in Silicon Analysts data over a 7d/30d window, derived from the daily snapshot ledger.

`GET /api/v1/changes`

## Request

- Base URL: `https://siliconanalysts.com`
- URL: `https://siliconanalysts.com/api/v1/changes`
- Auth: none required

"What Changed" — recent movements in Silicon Analysts data over a 7d/30d window, derived from the daily snapshot ledger. Each moved metric returns direction (up/down), magnitude (percent for value metrics, percentage-points for rate metrics), old/new values, the two snapshot dates compared, window_days_actual (real lookback — clamps to available history), and per-record provenance. Domains (the datasetId values): wafer_pricing, chip_cost, gpu_secondary, margin_benchmark, foundry_capacity, defect_density, nre_cost, packaging_benchmark, chip_archetype, electricity_price, cloud_pricing, llm_pricing, memory_spot, foundry_economics, market_prints, fab_capacity, hbm_market.

## Query parameters

- `window` string
- `since` string
- `datasetId` string
- `minDelta` string
- `limit` string

## Response `200`

Successful response

- Envelope: Shared response envelope. Endpoint-specific payloads ride in `data`; `meta` carries provenance, freshness, and pagination hints.
  - `success` boolean
  - `data` object
  - `meta` object

---

[API](https://skmtc.dev/siliconanalysts/apis/silicon-analysts-data-api.md) · [All operations](https://skmtc.dev/siliconanalysts/apis/silicon-analysts-data-api/llms.txt) · [OpenAPI document](https://skmtc.dev/siliconanalysts/apis/silicon-analysts-data-api/revisions/6f151fef25c4?raw)