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Changelog

11 updates to Bullion API. means shipped in the last 7 days.

October 2026

Bullion APILive

Adding US Treasury holders to the Bullion API

You can now see which countries hold US Treasury securities (US government bonds) each month, ranked, with a page for every holder.

  • A ranked page of every foreign holder, with the total and the official share (held by governments and central banks)
What else changed (3)Show fewer
  • A page for each holder with its rank, its change over the month and the year, and its last 12 months
  • A note on every page that holdings are counted in the country of the custodian (the bank that holds them), not where the owner is
  • A holder's change shows only when the previous month's figure is stored

Read the storySee US Treasury holders on bullionapi.dev

Bullion APILive

Adding who holds US federal debt to the Bullion API

You can now see how much US debt foreign investors, the Federal Reserve and everyone else hold, quarter by quarter.

  • A Holders tab on the US government debt page, with the latest split, a share bar, a chart and a quarterly table
What else changed (3)Show fewer
  • The same quarterly history from the API
  • The split is available to AI assistants through the Bullion API MCP server (a connector that lets them read the data)
  • Amounts in millions of US dollars, in the same format as the other government-finance data

Read the storySee US debt holders on bullionapi.dev

Bullion APILive

Tracking what the US pays in interest on its debt with the Bullion API

You can now see what the US government pays in interest each quarter, next to gold, rates and yields.

  • US federal interest payments, quarterly, in millions of US dollars
What else changed (3)Show fewer
  • An Interest tab on the US government debt page, with an API tab beside it for the same series
  • Each value is a yearly rate adjusted for the season, so divide by four for one quarter
  • The same API serves gold, policy rates (central-bank interest rates) and bond yields to compare it against

Read the storySee US debt interest on bullionapi.dev

Bullion APILive

Adding portfolio pages, a portfolio API and read-only MCP tools to the Bullion API

You can now track your gold and silver holdings on portfolio pages, build the record from your own code, and let an AI assistant read it but not change it.

  • Portfolio pages with Overview, Transactions, Gains and Settings tabs, and a value-over-time chart for gold
What else changed (3)Show fewer
  • An API (a way for your code to talk to it) for transactions, open holdings and gains
  • A portfolio access setting on each API key: None, Read, or Read and write
  • Read-only assistant tools on bullionapi.dev for the summary, open holdings, gains and transactions, plus a Portfolio review prompt (a ready-made question an assistant can run)

Read the storyRead the portfolio docs on bullionapi.dev

Bullion APILive

Building a status page for the Bullion API that explains its incidents

You can now check a public status page that says what each check tests and gives every incident a timeline from open to close.

  • Incidents open after two failed checks and close after three good ones, each with its own timeline
What else changed (3)Show fewer
  • A public status page that says what each part's check is
  • Email updates for subscribers when an incident opens or closes
  • A live status badge on bullionapi.dev

Read the storySee the status page on status.bullionapi.dev

Bullion APILive

Requiring a verified email address for Bullion API keys

You now verify your email address before an API key returns price data, and sign-up needs only your email to start.

  • A “Verify your email” banner with a resend button in the dashboard
What else changed (3)Show fewer
  • Sign-up takes only an email address, and the emailed link confirms it before you set a password
  • An API key can't read price data until its owner verifies their email address
  • A blocked request is refused before it uses any of your quota

Read the storyTry the sign-up on bullionapi.dev

Bullion APILive

Adding an inflation-adjusted gold price to the Bullion API

You can now see the gold price in today's dollars, adjusted for inflation, and how gold moves against the real yield.

  • Daily gold prices restated in the dollars of the latest inflation (CPI) month
What else changed (3)Show fewer
  • A public tool that charts the plain and inflation-adjusted gold price together
  • Inflation figures adjusted for the season, so seasonal swings don't look like gold moving
  • A rolling comparison of gold with the 10-year US real yield (the bond yield after inflation)

Read the storySee inflation-adjusted gold on bullionapi.dev

Bullion APILive

Adding nine more central banks to the Bullion API's gold data

You can now see gold holdings for nine more central banks, so the pages cover 52 countries.

  • Gold holdings for nine more central banks, from Denmark to Moldova
What else changed (3)Show fewer
  • When a country reports only a value, its weight is worked out from the gold price and labelled as a calculation
  • Central-bank gold pages now cover 52 countries
  • A change the API works out itself is never labelled as buying or selling

Read the storySee central bank gold on bullionapi.dev

Bullion APILive

Building an MCP server for the Bullion API

I built a read-only MCP server so I could ask an agent about gold without handing it anything that could change an account.

  • Sign in and approve exactly what an assistant may read
What else changed (3)Show fewer
  • A read-only MCP server with no tools that change anything
  • The same data as the API, from prices and history to central-bank gold, rates, inflation and your portfolio
  • A public plugin (an add-on for AI assistants) with two skills (ready-made tasks), one for market analysis and one for portfolio review

Read the storyRead the MCP docs on bullionapi.dev

Bullion APILive

Adding a data page for every dataset in the Bullion API

You can now see every dataset behind the API on one page, including the central-bank and rates data that moves gold.

  • Every dataset in one place: metal prices, countries and economies, production history, gold metrics and calculators
What else changed (3)Show fewer
  • Central-bank gold holdings for 52 countries, with monthly changes back to October 2016
  • Reserves for 176 countries and regions, with and without gold
  • Holdings are kept apart from purchases, because a change in holdings often isn't a purchase

Read the storySee the data page on bullionapi.dev