The Expedia Group Partner Solutions API - powering flexible travel bookings

Expedia Group Partner Solutions API lets US travel brands tap Expedia inventory directly into their own sites and apps. Anyone holding Expedia Group stock (NASDAQ: EXPE, ISIN US30212P3038) should know this product.

By Julian Reed, ad hoc news Software & Services Desk. Reviewed July 02, 2026, 12:00 PM ET. Details in the imprint.

Expedia Group Partner Solutions API is the kind of tool you notice only when a booking just feels smooth. You pick a hotel in New York, tap to reserve, and behind the scenes this API is stitching together live rates, room photos, and cancellation rules from Expedia’s travel marketplace.

What the EPS API does

Expedia Group Partner Solutions, often shortened to EPS, is the B2B arm of Expedia Group that lets other companies plug into Expedia’s travel content and technology. Its flagship connectivity product is the EPS Rapid API, a set of RESTful endpoints that exposes hotel and vacation rental inventory, pricing, booking, and management functions directly into a partner’s own website or app.

In practical terms, a US bank, airline, or loyalty program can offer branded hotel booking, powered silently by Expedia, without sending customers to expedia.com. The EPS API handles search, availability checks, booking creation, modifications, cancellations, and post-stay data, while the partner controls the front-end design and customer relationship.

How partners use it

Expedia Group pitches EPS as a way for partners to monetize travel demand without building their own booking infrastructure. The API’s hotel search endpoints return structured data on properties, room types, amenities, maps, and photos, along with multiple rate options such as refundable and non-refundable stays. Partners can filter by price, star rating, location, or chain, then present curated options to their users.

Booking is handled via dedicated calls that create a reservation against Expedia’s back-end, but under the partner’s brand. The partner typically collects payment from the customer, then settles with Expedia according to commercial terms, which can include commission-based or net-rate models. That mix lets a US loyalty program, for example, offer travelers the choice to pay cash, redeem points, or blend both, while still using EPS for fulfillment.

US market angle

For US consumers, EPS is largely invisible but increasingly present. When a credit card app shows hotel options with familiar room photos and detailed cancellation policies, there is a decent chance EPS is behind it. Expedia Group has flagged Partner Solutions as a contributor to its wider growth, highlighting relationships with banks, loyalty schemes, and travel intermediaries.

In a recent investor presentation, Expedia Group’s CEO Peter Kern cited B2B travel as a strategic focus area, with EPS designed to extend Expedia’s reach beyond its own branded sites. That means US travelers may be booking through an airline portal, a fintech app, or a corporate travel tool, all drawing from the same underlying inventory and pricing engines that feed Expedia’s direct-to-consumer platforms.

Developer experience and integration

On the technical side, the Partner Solutions API is structured around JSON over HTTPS, supporting standard HTTP verbs and modern authentication methods. Developers integrate via SDKs, code samples, and documentation found on Expedia Group’s partner and developer portals. That documentation outlines schemas for hotel offers, search filters, booking requests, and error handling, plus guidance on localization, currency conversion, and tax considerations.

One product manager at a US travel startup described EPS Rapid in a tech blog as “the quickest way we found to go from concept to full hotel booking within our app,” citing the catalog of global properties and built-in handling of payment flows and customer service handoffs. While that comment came from a promotional case study, it matches what many partners look for: speed, coverage, and reliability.

Coverage, content, and reliability

Expedia Group says EPS offers access to hundreds of thousands of properties worldwide, including hotels, vacation rentals, and alternative accommodations drawn from Expedia, Hotels.com, and other group brands. That coverage is a core selling point: a US-based partner can serve customers booking a quick night in Chicago or a long stay in Lisbon using the same API calls, simply adjusting filters and currencies.

The API also returns rich content. Partners receive photos, descriptions, amenity lists, and property policies, often in multiple languages. Configuration allows for image size optimization so mobile apps do not get overloaded with large files while still showing clear visuals. Cancellation and change rules come through in structured fields, helping partners display precise deadlines and penalty structures so travelers avoid surprises.

Revenue impact for partners

For companies that integrate the EPS API, travel bookings become an additional revenue line or loyalty driver. Banks may earn commissions on hotel stays booked by cardholders through their apps; airlines can bundle hotels with flights, raising basket size and giving travelers one-stop itineraries. Some US fintechs pursue a model where travel perks differentiate premium card tiers, and the EPS API underpins the perk.

The economics are not uniform, and Expedia Group does not disclose margin specifics per partner, but in its public commentary management points to B2B as a less volatile revenue stream than pure consumer traffic. That matters for investors watching how Expedia balances direct marketing spend with long-term contractual relationships through EPS.

First-hand feel of an EPS-powered flow

You notice the EPS touch most clearly in the booking flow. When you open a US airline’s app, search “Seattle hotels,” and see a tidy list with clear nightly prices, taxes broken out, and a bright banner that says “Free cancellation until 6 PM,” that presentation often comes right off EPS endpoints.

The rate cards load in a couple of seconds, and switching dates adjusts prices almost instantly. That responsiveness relies on Expedia’s pricing engines and caching layers, exposed through the API. It reduces the friction that used to plague white-label travel sites, where outdated availability and slow refresh times turned travelers away.

Risk, compliance, and data handling

Travel bookings involve sensitive data: names, payment card details, addresses, sometimes passport information. Expedia Group’s EPS documentation stresses compliance with PCI standards for payment data and outlines encryption practices for API calls. Partners must meet their own obligations, but the back-end that holds reservation data is built to large-scale security and privacy requirements.

From a US regulatory standpoint, partners remain responsible for how they present consents and disclosures to customers. However, EPS helps by standardizing the way policies and terms are delivered through the API, so partners do not have to parse free-form text for critical conditions like non-refundable rates or resort fees.

Competition and differentiation

Expedia Group is not alone in offering B2B travel APIs. Booking Holdings has its own suite of connectivity products, and smaller tech firms sell vertical solutions for airlines or banks. Expedia Management often positions EPS as differentiated by the breadth of multi-brand supply and years of experience running high-volume consumer sites.

Analysts covering online travel have noted that B2B segments can produce steadier revenue than consumer brands, which are more exposed to marketing cycles and search engine dynamics. For a US investor, EPS sits inside that narrative: if Expedia’s consumer business faces pressure from direct hotel bookings or metasearch, Partner Solutions can keep feeding hotel nights and gross bookings from embedded channels.

COVID-era lessons and recovery

The pandemic stress-tested every part of travel technology, including B2B APIs. Mass cancellations, shifting border rules, and sudden surges when restrictions eased forced EPS to handle waves of booking changes and backlog support. Expedia executives have discussed using that period to refine automation and improve partner tools for modifications.

As US travel demand rebounded, especially for domestic leisure, EPS became a platform through which partners captured pent-up bookings without rebuilding entire tech stacks. That resilience is part of why B2B travel remains a key bullet point in Expedia’s strategic updates.

Why this matters for US investors

Expedia Group, based in Seattle, segments its business into Retail, B2B, and Trivago in its filings, with Partner Solutions falling squarely in the B2B bucket. In recent quarters, management has highlighted B2B growth as a pillar of their “One Expedia” tech platform strategy, where shared components serve both consumer and partner channels. That implies incremental margin benefits when new functionality, like improved pricing algorithms, rolls out simultaneously across EPS and branded sites.

For US retail investors, this means the EPS API is more than just plumbing. It is a route through which Expedia Group monetizes travel demand it does not own directly, relies less on paid search to attract traffic, and reinforces long-term contracts with banks, airlines, and other partners. Expedia Group stock (NASDAQ: EXPE) is commonly discussed with this B2B leverage in mind, though analysts differ on how much value they assign specifically to Partner Solutions.

Key facts on EPS API

• Product: Expedia Group Partner Solutions API (EPS Rapid)
• Manufacturer: Expedia Group, Inc.
• Category: Software / Service / Subscription
• Launch: Rapid platform introduced in the mid-2010s, with ongoing updates.
• MSRP / Price: Commercial terms vary; typically commission-based or negotiated partner contracts in USD.
• Availability: Offered to qualified partners globally, including US banks, airlines, loyalty programs, and travel agencies.
• Target audience: Companies wanting to embed hotel and travel booking in their own digital properties without running full inventory and booking systems.
• Standout / USP: Direct access to Expedia Group’s broad lodging inventory and booking capabilities through a flexible, brandable API.

This article was AI-assisted and editorially reviewed. Product information is provided without warranty; prices and availability may change at short notice. Not investment advice and not a buy or sell recommendation. Securities trading carries risks up to total loss.