---
title: "Historical calculator benchmarks from the bitemporal observation ledger: wafer cost by node/foundry (deflationary curve…"
method: GET
path: "/api/v1/benchmarks/history"
tags: ["history-pro"]
---

# Historical calculator benchmarks from the bitemporal observation ledger: wafer cost by node/foundry (deflationary curve…

`GET /api/v1/benchmarks/history`

## Request

- Base URL: `https://siliconanalysts.com`
- URL: `https://siliconanalysts.com/api/v1/benchmarks/history`
- Auth: one of:
  - API key in header `X-API-Key`
  - HTTP bearer

Historical calculator benchmarks from the bitemporal observation ledger: wafer cost by node/foundry (deflationary curves), defect-density (D0) learning curves, packaging + CoWoS-interposer costs, test cost, backend yield, HBM $/GB. Per-source dated observations (as_of = date the reading reflects; curated backfill extends history) or month/quarter median/min/max rollups via grain=.

## Query parameters

- `benchmark_type` string
- `entity_id` string
- `foundry` string
- `from` string
- `to` string
- `grain` 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)