Predictable pricing with no overage fees

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.

All plans are billed in US dollars: Pro is $9 per month and Business is $29 per month. Annual billing is currently unavailable. Pro subscribers can upgrade to Business from the billing dashboard; the switch is immediate and the charge is prorated.

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.

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.

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.

Contact security@bullionapi.dev if your volume requirements exceed the published Business quota.

Gold prices are cached in our database and refreshed every hour by a scheduled job. API responses are served from that cache.

No. Bank of England sterling M4 and consolidated balance-sheet 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.

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

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

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.

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.

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.