From the TraveleXe engineering team. We build APINex, a unified travel API — this post is about the trade-offs, including when you shouldn't use one.
If you're building a travel booking product, you'll hit the supplier question early: integrate each hotel supplier directly, or put one aggregation layer in front of all of them?
Direct integrations give you full control of each supplier's features and no middle layer. The cost: every supplier has its own schema, auth, error codes, rate-limit behaviour and certification process. Ten suppliers is ten of everything, and they all change on their own schedules.
A unified API gives you one schema, one auth model and normalised responses. The costs are real too: you depend on the aggregator's uptime and its mapping quality, and supplier-specific features may arrive later.
What mattered most for us:
- Normalisation is the product. Converting ten XML dialects into one JSON response is the easy part. Knowing that two responses describe the same hotel and the same room (mapping) is the hard part.
- Caching is a correctness problem, not just speed. Cached availability that goes stale turns into failed bookings. Cache search, re-check price at pre-book, never cache the final confirmation.
- Timeouts per supplier. One slow supplier shouldn't hold the whole search. We return what's ready and stream late results.
- Bring-your-own-credentials keeps your negotiated rates yours.
When should you integrate directly? If you only need one or two suppliers, or a supplier's special feature is core to your product.
Longer write-up with a decision table:
https://www.travelexe.com/one-hotel-api-vs-multiple-supplier-integrations/
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