Free
$0
Evaluate the API. No credit card.
Non-commercial use of the Bullion API Service only
Start free- 30 requests / month
- Every endpoint and dataset
- 365 days of history
Predictable pricing with no overage fees
Start free for non-commercial Service use and upgrade when you need more requests or commercial Service use. No surprise bills. Cancel any time on every plan.
Before payment: National Bank of Ukraine open data are available free of charge from the publisher. The NBU permits commercial reuse of its open data with attribution to the National Bank of Ukraine. Prior approval is required before modifying or editing NBU source data; Bullion API preserves the reported valuation in millions of US dollars and derives no quantities or changes. Bullion API charges for caching, normalization, and delivery. Other publishers may have different terms; publisher terms and Bullion API plan terms apply. Standard plans do not authorize raw-data redistribution or resale. Before payment: Original ECB statistics are freely available from the European Central Bank. The ECB permits commercial and non-commercial reuse when statistics and metadata are unchanged; quote the source, for example “Source: ECB statistics.” Identify any changes; Bullion API applies the published unit multiplier, normalizes ounces, and converts reported weight to tonnes. Bullion API charges for caching, normalization, and delivery. Other publishers may have different terms; publisher terms and Bullion API plan terms apply. Standard plans do not authorize raw-data redistribution or resale. Before payment: Original Banco Central do Brasil time series are freely available from the Banco Central do Brasil. The Banco Central do Brasil publishes this series under the Open Database License (ODbL) 1.0: attribute the Banco Central do Brasil, and offer any adapted database you make public under the ODbL (share-alike). Identify any changes; Bullion API stores the published values in millions of US dollars and derives the change from the previous observation. Bullion API charges for caching, normalization, and delivery. Other publishers may have different terms; publisher terms and Bullion API plan terms apply. Standard plans do not authorize raw-data redistribution or resale.
Pro
Most popular$9/mo
Higher-volume evaluation and internal use.
Non-commercial use of the Bullion API Service only
Start Pro- 50,000 requests / month
- Every endpoint and dataset
- 365 days of history
Business
$29/mo
Commercial use of the Service in your own product or service.
Commercial use included; raw or substantially equivalent market-price data and API access cannot be redistributed or resold
Start Business- 100,000 requests / month
- Every endpoint and dataset
- 365 days of history
What changes when you upgrade
Every plan can call every endpoint with the same data. Pro raises the monthly request limit, and Business adds a higher limit and commercial Service use.
| Free | Pro | Business | |
|---|---|---|---|
| Monthly requests | 30 | 50,000 | 100,000 |
| Gold price data | Yes | Yes | Yes |
| Gold/silver ratio | Yes | Yes | Yes |
| Gold technical indicators | Yes | Yes | Yes |
| Active currency catalogue | Yes | Yes | Yes |
| Gold price history depth | 365 days | 365 days | 365 days |
| Price cache TTL | 1 hour | 1 hour | 1 hour |
| Annual central-bank reserve values and gold share | Yes | Yes | Yes |
| Monthly central-bank gold holdings | Yes | Yes | Yes |
| Usage rights | Non-commercial use of the Bullion API Service only | Non-commercial use of the Bullion API Service only | Commercial use included; raw or substantially equivalent market-price data and API access cannot be redistributed or resold |
The basics are never paywalled
No overage fees
Requests stop at your monthly limit. There are no surprise charges.
Gold price data
Gold spot prices in the currencies listed by the live symbols catalogue.
Derived gold/silver ratio
Calculate the latest or stored daily gold-to-silver ratio with /v1/gold-silver-ratio.
Gold technical indicators
Request moving averages, realised volatility, and drawdown from the same cache.
JSON responses
Predictable shape. No GraphQL, no SDK lock-in.
Status page
A public status page with live incident information.
Prices in currencies other than USD, EUR and GBP are derived from the most recent accepted Bullion API daily FX snapshot, not a provider end-of-day reference rate. Prices are informational only. They are not live FX rates, executable prices, transaction benchmarks or binding quotes, and must not be used for trading or settlement. Currency conversion input attribution: Exchange Rates By UniRateAPI. See the price methodology.
Questions about billing, quotas or data
Anything else? Contact us.
What counts as one request?
Usage increments after API-key and quota checks but before endpoint validation, so invalid date-range requests count. Requests rejected for a missing or invalid key, or because the quota is already exhausted, do not.
What currency do you bill in?
All plans are billed in US dollars: Pro is $9 per month and Business is $29 per month. Annual billing is $90/year for Pro ($7.50 effective monthly; $18 saving) and $290/year for Business ($24.17 effective monthly; $58 saving). Pro subscribers can upgrade to Business from the billing dashboard; the switch is immediate and the charge is prorated.
Can I cancel any time?
Yes. Cancel from the dashboard at any time. You keep access until the end of the period you have paid for. Within 14 days of the first payment on a new Pro or Business subscription, you can request a full refund, whether that first payment is monthly or yearly. Later renewals and unused time in a billing period are not automatically refunded, except where required by law or manually approved. Your API keys remain valid at the Free tier limits after cancellation.
What happens if I exceed my monthly quota?
Requests beyond your monthly quota return 429 Too Many Requests with a Retry-After header. We never charge overage fees — you can either upgrade your plan or wait for the monthly reset on the first of each month.
Is there a free trial of the paid plans?
There is no formal trial, but the Free plan (30 requests per month) is enough to evaluate the API for non-commercial Service use. Upgrade to Pro for higher-volume non-commercial Service use or Business for commercial Service use.
Do you offer custom plans?
Contact security@bullionapi.dev if your volume requirements exceed the published Business quota.
How is the price data sourced?
Gold prices are cached in our database and refreshed every hour by a scheduled job. API responses are served from that cache.
Do paid plans charge for Bank of England money-supply data?
No. Bank of England sterling M4 source data is available free of charge and may be reused under the Open Government Licence v3.0 with attribution. Bullion API paid plans charge for API access, caching, normalization, and delivery, not for the underlying source data. The Bank of England does not endorse Bullion API.
How is Bank of Canada monetary data sourced?
The monetary series are sourced from the Bank of Canada's Valet Web Services JSON observations. The source data is available on the Bank's website free of charge; Bullion API charges for caching, exact normalization, and API delivery. Valet decimal-string values are normalized exactly and returned as decimal strings; monthly source dates are represented as calendar month-end periods. Before you purchase, please note that the data comes from the Bank and is available free from its site. Attribute the Bank and indicate our changes without implying its endorsement. Third-party content is excluded unless separately licensed. Sources: Bank of Canada Valet Web Services · Bank of Canada terms
Can I get the Australian monetary data directly from the RBA?
Yes. The Australian money-supply and Reserve Bank balance-sheet data we serve is published free of charge by the Reserve Bank of Australia. Paid Bullion API plans charge for API access, caching, normalization and delivery, not for the underlying RBA data. This RBA Financial Data is governed by section 5 of the RBA Copyright and Disclaimer Notice, not CC BY 4.0. See the RBA D3 Monetary Aggregates and A1 Balance Sheet tables and the RBA notice for reuse terms. Bullion API attributes the source and does not imply RBA endorsement. Sources: RBA D3 Monetary Aggregates · RBA A1 Balance Sheet · RBA Copyright and Disclaimer Notice
What does /v1/gold-silver-ratio provide?
The /v1/gold-silver-ratio endpoint provides the gold-to-silver ratio from Bullion API’s local price cache. It supports a latest snapshot or an inclusive historical UTC-day range and is available on every plan under the same Service-use terms as the rest of the API.
How is the central-bank reserve data sourced?
The /v1/central-bank-reserves endpoint is available on every plan and returns cached annual reserve observations. Annual value changes combine holdings changes, price movement, and revisions; they do not measure tonnes bought or sold. Source-data reuse rights remain separate from API plan terms and are governed by applicable terms.
Can I use this in commercial products?
Commercial use of the Service is included with Business. Free and Pro are for non-commercial Service use only. Standard plans do not permit redistribution of raw or substantially equivalent market-price data or redistribution or resale of API access. Where the source grants reuse or redistribution rights in particular public statistics, those rights remain unaffected by plan and are subject to the source terms; see the Terms of Service.
Start free, then choose Business for commercial Service use
30 free requests every month for non-commercial evaluation, no credit card.