Asking Claude to fully book a trip took 6 months—and became a startup
Efistoffeles · reddit · 2026-09-14
It started simple: could the default Claude app fully book a Warsaw–London trip, flights and hotel? The integrated connectors (Expedia, Kiwi) were poor, so the author built it himself; a friend joined a week in and it became LetsFG, taking six months from first commit.
Getting all offers: Claude listed 200 OTAs, metasearches and airline sites, each scraped by a separate agent on his backend. Travel APIs are fiercely gatekept; cheap Gemini models were bad, GPT-5.6 Luna was a game changer. After two weeks of optimization he realized sites are just network calls—parsing requests directly instead of reading pages cut costs 20x.
End-to-end booking took 3 months: payments had to be bank-grade safe without Claude or any agent ever seeing card data. Ten payment providers said no over two months; a tip from his engineer cousin led to Revolut, which supported the use case perfectly.
The payoff: they'd replaced part of an executive assistant's job, and Claude finds cheaper fares humans miss—e.g., splitting round trips into two one-ways across sites.
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