---
title: "Terms"
description: "Terms of use for ValueThen and its public API."
url: "https://valuethen.com/terms/"
language: "en"
site: "ValueThen"
publisher: "Rising Throne"
updated: "2026-09-02"
license: "Data: World Bank CC BY 4.0, ECB, FRED"
---

# Terms

Terms of use for ValueThen and its public API.
# Terms

Last updated: September 2026

ValueThen is provided free of charge for information purposes. Results are estimates based on annual consumer price indices and reference exchange rates from official sources (World Bank, European Central Bank, FRED). They are not financial, tax or legal advice, and we do not guarantee accuracy or availability.

The public API may be used in your own projects under fair-use rate limits. Do not resell raw data or misrepresent its origin. Attribution to the underlying sources is appreciated.

Sister sites and third-party links are provided for convenience and are governed by their own terms.

Questions: [contact@therisingthrone.com](mailto:contact@therisingthrone.com?subject=valuethen.com)

## Use this page programmatically

The same figure from the free API, no key required:

```bash
curl "https://api.valuethen.com/v1/convert?amount=100&from=USD&to=EUR&fromYear=1970&toYear=2026"
```

```json
{ "result": 777.71, "method": "cpi-then-fx", "sources": ["World Bank FP.CPI.TOTL, 2010=100"] }
```

---

Data sources: World Bank FP.CPI.TOTL, ECB HICP and reference rates, FRED CPI-U.
Free JSON API: https://api.valuethen.com/openapi.json · Agent guide: https://valuethen.com/llms.txt · MCP: https://api.valuethen.com/mcp