I’m Paul. I build focused tools that do one job, and do it well.

The Bullion API data page — bullionapi.dev/data

The Bullion API homepage — bullionapi.dev

A dot under an icon means the product is live. The other four are still being built.

Products

Bullion APILiveMetal prices in 151 currencies, for your app.SatzoIn developmentUK crypto gains and balances across your wallets.SwitchboardIn developmentCustomers and their emails, across all your projects.LookoutIn developmentScheduled checks for SEO issues worth fixing.Workflow HealthIn developmentSpot queued or slowing GitHub Actions jobs.

Changelog

See everything I’ve shipped

26 October 2026Bullion API

The Bullion API portfolio Overview tab with demo data. Four number cards show current value of £12,961.26, unrealised profit and loss of £1,092.12, open cost basis of £11,869.14 and the gold price of £2,268.33 per troy ounce. Below them are a value-over-time chart with buy and sell markers and a hatched two-day gap, a holdings table for gold and silver, and the five latest transactions.

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

Track gold and silver holdings on portfolio pages, build the record from an agent over REST, and let an assistant read it through a read-only MCP.

24 October 2026Bullion API

Every incident, from open to close.

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

I built a public status page for the Bullion API, chose checks with a clear failure meaning, and gave every incident a timeline from open to close.

24 October 2026Bullion API

No price data until the email is verified.

Requiring a verified email address for Bullion API keys

How I put email verification in front of Bullion API access, then changed sign-up so the emailed link itself proves the address before anyone sets a password.

Notebook

165 notes, mostly about AI, Laravel and React.

Browse the notebook

Sending a prompt to a Claude Code cloud session from my terminal25 Oct Long Claude Code sessions pay for their whole history on every call25 Oct What happens to developers who don't adapt to AI24 Oct useState, useReducer and the mental model of state in React24 Oct