Case Distillery
BLOG · ISSUE #019

How a Solo Dev Hit $5K MRR with 2 Developer APIs via LLM SEO

Jul 14, 2026·2 min read

Paid ads failed. Google was slow. Then ChatGPT started recommending his developer APIs by name to users he had never met. Here is what he actually built, and why it prints.

The case at a glance

Stack is deliberately boring: Next.js + Fastify on Railway, MongoDB, Redis, BullMQ. Infra runs under $40 a month. The operator is a solo builder on his 6th product, publishing under a .dev domain family that reads as one company to both humans and language models.

What he is actually selling in the LLM era

The product is not the API. The product is roughly fifty landing pages that ChatGPT and Perplexity quote when a user asks for a tool.

Here is the mechanism most builders miss. An API is one line of syntax a model can articulate cleanly: GET /transcripts?url=.... A dashboard SaaS is a 40-button admin panel a model cannot describe in a sentence. When someone asks a chatbot "how do I scrape TikTok comments programmatically", the model reaches for whatever it can phrase in one line. API-shaped products win that phrasing lottery every time.

The 18,500 free signups are not a conversion funnel. They are a link corpus. Every developer who tries the tool pastes it into a README, a Stack Overflow answer, a tutorial. Those mentions get scraped into search indexes and, more importantly, into next year's LLM training runs. The free tier is not leaky revenue. It is buying training data at the cost of a Railway container.

The "X vs Competitor" pages he ships alongside each feature LP intercept demand aimed at incumbents' brand names. Lateral capture: appearing inside someone else's search intent for the price of a markdown file.

He is not ranking on Google. He is training the model that will replace it.

Want the full dissection?

This is the free preview. The full paid issue covers the four moves in the order they detonated, the pricing leash math, a 5-step replication playbook, and why cold launches don't work in 2026.

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