Making the Numbers Add Up in a Multi-Tenant Claude API SaaS — Field Notes on Isolation and Cost Attribution
The first thing that breaks when you make a Claude API SaaS multi-tenant is the month-end reconciliation. Here are field notes on a single metering chokepoint, atomic counters, reconciling against Anthropic's bill, and proving tenant isolation with adversarial tests — with production TypeScript.
90 Days Building a Solo SaaS with Claude Code — And the Three Things I Got Wrong
A working log from 90 days of building a solo SaaS with Claude Code — design conversations, model routing, and Cloudflare Workers constraints. Revisited months later against primary docs, with three technical claims corrected in place.
Building a Recurring Revenue Freelance Business with Claude Code — A 6-Month Roadmap to ¥1M MRR
Transform your freelance dev business from per-project income to predictable monthly recurring revenue. Learn how to pitch retainer contracts, price Claude Code's productivity gains correctly, and build a client management system that scales to ¥1M MRR.
Building a Subscription SaaS with Claude API and Stripe — A Complete 2026 Implementation Guide
An end-to-end implementation guide for shipping a subscription SaaS built on Claude API, Stripe, and Cloudflare Workers — covering checkout, webhooks, KV-backed access control, usage limits, and the production edge cases that always bite.
Claude × Stripe Meter Events — Building a Usage-Based SaaS
A production-ready architecture and full implementation for billing Claude API token consumption through Stripe Meter Events — covering idempotency, usage caps, and a hybrid base + overage pricing model.
Building a Production Multilingual Translation SaaS with Claude API — Glossaries, Style, and Domain Adaptation in Practice
A practical, code-first design guide for running a translation SaaS on Claude API: glossaries, style guides, domain adaptation, quality gates, and cost controls that survive real production traffic.
Building a Recurring Billing SaaS with Claude API and Stripe — From Architecture to Production
A complete architecture guide for building a SaaS product powered by Claude API with Stripe recurring billing. Covers usage metering, tiered pricing, webhook handling, and production deployment patterns.
Indie Developer's Claude API SaaS Launch Blueprint — A 90-Day Roadmap from Idea to Paying Customers
A complete 90-day roadmap for building an indie Claude API business: idea validation, Stripe integration, SEO, subscription pricing tests, and the operational and emotional discipline that makes it last. Drawing on twelve years of solo app development and the new realities of AI APIs.
Claude API Revenue Models Compared — Pay-per-Use, Subscription, One-Shot, and Revenue Share for Indie Developers
When you build something with Claude API to make money, the hardest decision is rarely the API itself — it's the pricing model. This guide compares the four most common models from an indie developer's point of view.
Implementing Usage-Based Billing for Claude API Services — Token Tracking, Price Conversion, and Stripe Metering from Scratch
A complete implementation guide for usage-based billing in Claude API services. Covers token measurement, markup calculation, Stripe Metered Billing integration, and per-user plan limits — with production-ready code throughout.
Claude API × MCP: Building a Paid Consulting SaaS That Runs Without You
Build a sustainable consulting SaaS solo. Learn the complete architecture, implementation, and operations behind a ¥30,000/month revenue system using Claude API, MCP, Stripe, and CloudFlare KV. Includes real code, cost breakdowns, and hard-won lessons from scaling to enterprise.
Building a Stripe Subscription SaaS with Claude Code: Webhooks, Auth, and Production Pitfalls
Shipping a Stripe subscription SaaS with Claude Code on Cloudflare Workers: Webhook verification, KV + Cookie auth, and a cookie regex that failed silently.