J. McFly

Building founder • Bootstrapped
Sharing the journey ⚡

[J. McFly @jtmfley]

I built a free and open-source tool to evaluate LLM agents: define your agent in YAML, run it against multiple LLMs in parallel, see exactly where each model fails and what it costs.
Browser-native. No install. No account.

https://t.co/KnBXgmPi32

#llm #aiagents #opensource

[J. McFly @jtmfley]

The https://t.co/N0znI4lNPs standalone server remains under heavy construction.

#buildinpublic #DevInfra #SelfHosted

[J. McFly @jtmfley]

@georgevalandis Nice setup. 😃

[J. McFly @jtmfley]

Currently writing a deep-dive blog post on how agent chains are implemented and how to track costs across them.

#buildinpublic #ai

[J. McFly @jtmfley]

I've been cooking all day. 👨‍🍳

#buildinpublic #SaaS

[J. McFly @jtmfley]

New update to https://t.co/N0znI4lNPs:
AI credits are now only deducted after a successful inference.

If an agent chain fails or aborts, you won’t be billed for incomplete results.

#buildinpublic #SaaS

[J. McFly @jtmfley]

AI cracks me up every time. That’s why I believe products should have a soul, not just features.

#BuildInPublic #AI

[J. McFly @jtmfley]

How do you build your landing page (SEO friendly) and which framework do you use?

[J. McFly @jtmfley]

@the4hourfounder What a photo! :)

[J. McFly @jtmfley]

Improved the onboarding UX. You can now sign in with Google.

#buildinpublic #saas #ux

[J. McFly @jtmfley]

I noticed an unclaimed verification token in the DB.
Reached out to the user. He was unsure about magic links.

Explained how it works, but realized the point.

Learning: listen to hesitation. It shows you where to build trust.

[J. McFly @jtmfley]

"cdk deploy" - my daily dopamine hit 🚀

#buildinpublic #aws

[J. McFly @jtmfley]

@anthdm This video reminded me why I love programming: the creativity, the freedom. https://t.co/LqZmZBUcLT

[J. McFly @jtmfley]

@ImSh4yy Just KISS

[J. McFly @jtmfley]

I’ve been dogfooding https://t.co/f3nSMRkX4X from day one. Every feature I ship gets tested on own event data first.

What I’ve learned so far:
- You catch blind spots way faster
- “Next Steps” feel real when you actually use them
- Small wins keep momentum high

#buildinpublic

[J. McFly @jtmfley]

now daily → deploying to production.
feels great to see progress compound.

#indiehackers #buildinpublic

[J. McFly @jtmfley]

Cooked today at https://t.co/N0znI4lNPs:
• Integrated the AI tutor with docs as its knowledge base
• Fixed the damn dark mode (finally)
• Polished login & verification UX
• Improved inference cost tracking for users

One step at a time 🛠️
#buildinpublic

[J. McFly @jtmfley]

I keep my sense of humor - even in my products.

#buildinpublic

[J. McFly @jtmfley]

After 3 months of setbacks, zero motivation, and thinking about quitting. I kept showing up. Rebranded, redesigned the pricing plans, and deployed to production.
What a feeling.

Building in public also means pushing through when no one’s watching.

#buildinpublic

[J. McFly @jtmfley]

@samm_duc It's great so far. Learning: always add a free plan. :)

[J. McFly @jtmfley]

I’ve been quiet for a while and have been cooking...

Rebranded https://t.co/CXIOgFBD48 → https://t.co/N0znI4lNPs
Integrated payments
Added a Free Plan so you can try it instantly
First version is now live & ready to test

#buildinpublic #indiehacker #saas #startups