Blog

Building the Citadel

A series on Bitcoin circular economies, ecash privacy, AI agent commerce, and the infrastructure that ties them together.

01March 4, 2026

What is a Bitcoin Circular Economy and Why Your Community Needs One

A Bitcoin circular economy is a local loop where people earn, spend, and save bitcoin without ever touching a centralized exchange. Instead of buy-hold-sell, the goal is buy-from-each-other. A coffee shop pays a designer in sats. The designer tips a musician. The musician buys coffee. The circle closes.

02March 11, 2026

Fedimint vs Cashu: Choosing the Right Ecash Backend

Both Fedimint and Cashu give you ecash — blinded bearer tokens backed by bitcoin. But they make very different trust tradeoffs. This post breaks down when to use each and why ArxMint supports both.

03March 18, 2026

Building AI Agent Commerce with L402 and Ecash Paywalls

AI agents need to pay for things. APIs, compute, data, other agents' services. But agents don't have bank accounts, credit cards, or KYC documents. They need bearer payment instruments — tokens they can present without identity.

04March 25, 2026

From Prompt to Production: How ArxMint Deploys Bitcoin Infrastructure

Setting up a Bitcoin circular economy used to require deep expertise in multiple protocols, Docker networking, and Lightning node management. ArxMint reduces this to a natural language prompt.

05April 1, 2026

Privacy-First Payments: Silent Payments, Ecash, and the Sovereign Stack

Privacy in Bitcoin is not about hiding. It's about not creating data that can be used against you or your community. Every on-chain transaction is permanent, public, and increasingly surveilled. Ecash and Silent Payments fix this at different layers.

06April 8, 2026

Why We Chose Self-Hosted Over Hosted (And What That Means for You)

You keep 100% of every sale. No one can freeze your account. No one sells your payment data. That's what self-hosted means for a merchant.

07April 15, 2026

The Three-Question Merchant Deploy: How We're Making Self-Hosting Invisible

The tools to accept Bitcoin payments without a middleman exist today. The problem is that setting them up feels like a second job. DNS configuration, Docker networking, Lightning channel management, chain sync — each one is a wall between a merchant and their first payment.

08April 22, 2026

Zero-Knowledge Backups: How ArxMint Protects Merchant Funds It Never Touches

Your payment node is your business. If it disappears — disk failure, provider outage, mistake — you need to be back online fast. But if the backup service can read your data, you've just handed a third party access to your financial records and keys. That defeats the point of self-hosting.

09April 29, 2026

BTCPay Server Taught Us Everything (And Where We Diverge)

If you accept Bitcoin payments without a middleman today, you probably owe BTCPay Server something. It proved the model works — seven years of real merchants, real payments, fully open source. ArxMint wouldn't exist without the path BTCPay cut.

10May 6, 2026

Running a Bitcoin Payment Node on $7/Month: The Hardware Reality

Stripe takes 2.9% + $0.30 per transaction. A merchant doing $10K/month loses ~$320 to processing fees. A self-hosted ArxMint node costs $7/month — regardless of volume. That's $313/month back in your pocket, and it only grows as your sales grow.

11May 13, 2026

The Stripe Breakup: What Switching to Direct Payments Actually Looks Like

You're paying Stripe $320 a month on $10K in revenue. That's $3,840 a year — gone before you see it. And it gets worse as you grow: at $50K/month, Stripe takes $1,480. At $100K, nearly $3,000.

12May 20, 2026

Ecash for the Rest of Us: What Paying With Digital Cash Actually Feels Like

Paying with ecash feels like handing over cash — but from your phone. You scan a QR code, tap confirm, and it's done. No card number. No account login. No "processing" spinner. The merchant sees "paid" and you walk away. The whole thing takes about three seconds.

13May 27, 2026

No KYC, No Problem: Why ArxMint Doesn't Need Your Identity

Stripe asks for your SSN, bank statements, a photo of your government ID, and your business registration documents. Square wants the same. PayPal wants the same. Before you can accept your first dollar, every major payment processor demands you prove who you are, where you live, and that you're authorized to run a business.

14June 3, 2026

Lightning Address for Every Shop: The Physical-World Guide to Bitcoin Payments

Print a QR code. Tape it to the counter. You're now accepting Bitcoin.

15June 10, 2026

The Software Is Free. Here's How We Stay Alive.

The software is free. It will always be free. MIT licensed — anyone can use it, modify it, deploy it, sell services on top of it. No "community edition" with crippled features. No license key that expires. The full ArxMint merchant stack, permanently open source.