Human-grade storefront
Guests see a polished travel experience, while agents receive machine-readable availability and policy data.
Booking infrastructure for AI-agent travel
The hotel booking backbone for AI agents and travel platforms.
Hostrail connects AI agents, travel apps, and hotel operators through one reliable booking layer, from search and quote to hold, booking execution, payment, and post-booking operations.
Live supplyPilot supply
Markets staged7 cities
Agent surfaces8 endpoints
Execution flowSearch to service
Real-time availability
Price and policy continuity
Secure payments
Post-booking operations
Built for scale and reliability
AI Agents
Travel Apps
Concierge Bots
H
Hostrail
Booking Layer
Hotels
Hotel Chains
PMS / Channel Managers
VVietnam
Live hotel supply
Curated hotel supply
Vietnam supply network
RoomsRatesPolicies
Confirmed
#BKG_AP3521
Live quote
VVietnam
Real hotel supply
Curated hotel supply
Vietnam supply network
Verified room, rate, availability, payment, and policy data ready for agent and web booking flows.
Agent-safe pricing
Every quote carries the same rate, tax, cancellation, and payment constraints into the hold and booking steps.
Hotel-controlled distribution
Hotels keep control over inventory, rules, and post-booking workflows instead of exposing raw PMS access.
Why Hostrail exists
AI agents are a new booking channel. Your systems were not built for them.
Hostrail gives agents and platforms a reliable way to discover, price, hold, book, and service hotel stays while giving hotels a controlled way to expose inventory to agent-driven demand.
For AI agents
- Structured hotel access
- Reliable booking execution
- Post-booking support
For travel platforms
- One integration for the full flow
- Real-time data and policies
- Scalable infrastructure
For hotels
- Controlled distribution
- Policy and inventory control
- New agent-driven demand
Booking flow
End-to-end booking flow built for agents.
Search
Find available hotels, rooms, rates, and policy constraints.
Quote
Quote final-time rates, taxes, cancellation rules, and policies.
Hold
Reserve inventory before final commitment.
Book
Execute confirmed bookings with guest and payment details.
Service
Manage changes, cancellations, guest requests, and post-booking operations.
API products
One platform. Multiple machine-accessible surfaces.
Modular APIs and machine-readable surfaces power every stage of the booking lifecycle.
Search API
Find hotels, rooms, availability, prices, and policy constraints.
Quote API
Get real-time rates, taxes, policies, and cancellation rules.
Hold API
Hold inventory while the agent completes the booking flow.
Agent Card
Create and confirm bookings with guest and payment details.
Guest Service API
Modify, cancel, or manage bookings and guest requests.
Webhook Events
Get real-time updates across the booking lifecycle.
Policy Engine
Access machine-readable policies and data rules.
Hotel Supply Portal
Manage inventory, rates, and policies in one place.
Built for real booking execution
Reliable by design. Trusted in production.
Price continuity
Reduce quote-to-booking mismatches with structured hold and booking flows.
Policy clarity
Expose cancellation, refund, child, extra guest, and payment policies.
Guest visibility
Let hotels understand which booking came from agent-driven demand.
Post-booking ops
Support modifications, cancellations, guest requests, and handoffs.
For hotels
Give AI agents access to your hotel supply, without losing control.
- Control which inventory is exposed
- Set agent-specific rules and policies
- Receive bookings through existing workflows
- Track agent-driven demand
- Manage changes and guest servicing
For AI agents and platforms
Let your agent search, quote, hold, book, and service hotel stays.
- One API for hotel booking execution
- Structured availability and policy data
- Hold-before-book support
- Payment and guest handoff
- Webhooks for lifecycle events
POST /v1/bookings
{
"property_id": "HTL_12345",
"check_in": "2026-06-01",
"check_out": "2026-06-03",
"rooms": 1,
"guests": 2
}Booking confirmed
#BKG_AP3521
Our market rollout
Growing supply, city by city.
We are onboarding quality hotel partners across key destinations.
View all marketsHanoi
Pilot
Da Nang
Coming soon
Ho Chi Minh City
Onboarding
Hoi An
Pilot
Da Lat
Onboarding
Nha Trang
Coming soon
Phu Quoc
Coming soon
FAQ
Practical answers before an agent or guest commits
Native, crawlable answers about discovery, execution, payment rails and the shared booking system.
Can an agent retrieve live room plans?+
Yes. Agents can retrieve hotel pages, room types and rate-plan context through markdown surfaces and typed contracts. Coverage is limited to onboarded inventory.
Does the platform support quote and hold?+
Yes. Agents can move from search into quote and hold before booking. Quote output should be treated as the current source of truth for price and cancellation terms.
Which payment methods do you support?+
Stripe for cards, PayPal and VNPay. The available rails depend on currency and billing-country context, and the booking surface shows the active options before payment.
Can I use OpenAPI instead of markdown discovery?+
Yes. Markdown surfaces are useful for retrieval and grounding, while OpenAPI provides typed request, response and error contracts for orchestration.
Do you support MCP clients?+
Yes, when the MCP endpoint is configured for the environment. MCP is one machine entry point alongside llms.txt, Agent Card and OpenAPI.
Can guests manage bookings after checkout?+
Yes. The guest portal supports status retrieval, invoices, cancellation and follow-up inside the same booking system.
Is the same inventory used for web and agent flows?+
Yes. Humans start from hotel pages and search, while agents start from markdown and typed contracts, but both run on the same inventory, pricing and booking state.
Start building the booking layer for AI travel.
Join our partner program and build the future of autonomous travel.