Hopper
Hopper is a Boston- and Montreal-based travel booking platform and B2B travel fintech provider serving more than 120 million travelers globally. Its consumer app aggregates flights, hotels, rental cars, and homes alongside proprietary price prediction and a family of "for any reason" fintech ancillaries — Price Freeze, Cancel For Any Reason (CFAR), Change For Any Reason, Leave For Any Reason, and Disruption Guarantee. Through its B2B division, Hopper Technology Solutions (HTS), the company licenses those same fintech ancillaries, agentic AI customer service (HTS Assist), white-label travel agency products (HTS Stays, HTS Cars, HTS Packages), and travel loyalty portals to airlines, banks, and travel providers. HTS exposes a documented OAuth2-secured REST API — the HTS Airline API v1.1 — for embedding CFAR and Disruption Guarantee contracts in airline booking flows, with OpenAPI-generated SDKs for Java, .NET, Angular, and iOS, plus a JavaScript SDK for hotel price-freeze integration.
More than an index entry, but the surface is still mostly links rather than artifacts — the cohort most likely to move a full band from modest, well-targeted work.
API Evangelist profiles Hopper the way a machine reads it — 9 machine-readable artifacts across 5 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Hopper scores 27.7/100 (emerging), with a separate agent-readiness read of 41/100 (agent aware). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile Hopper
Each block below is one kind of artifact we hold for Hopper. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 5
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
Hopper Analytics API
In order to measure and continuously improve HTS Ancillaries performance, specific events occurring during a customer session can be sent by the partner airlines using some dedi...
Hopper Authentication API
This API is authenticated with OAuth 2, Client Credentials grant.\ Clients should use their `client_id` and `client_secret` to obtain an `access_token`.\ The `access_token` shou...
Hopper Cancel For Any Reason (CFAR) API
**What is Cancel For Any Reason?** Cancel For Any Reason (CFAR) enables airlines to offer refundability as an ancillary with HTS powering the dynamic pricing and supporting the ...
Hopper Disruption Guarantee (DG) API
**What is Disruption Guarantee?** Disruption Guarantee (DG) offers a premium disruption assistance service to customers in case of flight disruption, including rebooking options...
Hopper Sessions API
Hopper uses a unique ID to correlate API calls and events produced by a user's interaction with an airline application. The duration of the user's interactions is called a "sess...
Open Collections 1
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Airline API
OPEN COLLECTIONSecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for Hopper — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Company 6
The organization behind the API
Other 9
Properties that don't map to a standard resource type
Scroll within the panel for all 9 ·
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