Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Strong 6 Solid coverage with minor gaps

Cvent Event Travel APIAir requests and actuals, hotel requests and housing reservation requests attached to an event. Delivered a...64.3 StayingAPI Agent SkillsPublished portable SKILL.md agent skill in the stayingapi/travel-skills GitHub repo, referenced from the SD...63.6 StayingAPI MCP ServerHosted MCP server (Streamable HTTP, OAuth 2.1/PKCE) exposing 7 read-only tools mapping 1:1 to the REST endp...63.6 Per Diem APIGSA establishes the per diem reimbursement rates that federal agencies use to reimburse their employees for...62.2 ReefAPI MCP ServerHosted MCP server over streamable-HTTP with 5 discovery-first tools (search_engines, get_catalog, get_engin...56.9 ReefAPI REST APIPOST-based REST/JSON API fronting a catalog of web-data engines. Auth via x-api-key header; uniform {ok,dat...56.9

Developing 23 Usable, with meaningful gaps to close

FAA NAS Status Airport Status Information FeedUnauthenticated XML feed of national airspace system status — ground stop programs, ground delay programs, ...54.2 Autoura Experience APIThe Autoura Experience API provides access to tourism content including cuisine guides, destination informa...52.3 Autoura MCP ServerAutoura's hosted remote Model Context Protocol server, the surface it builds for AI agents first. One endpo...52.3 Wego APIThe public Wego API: resolve travel locations, create asynchronous flight and hotel searches, read ranked r...50.9 Skedulo Travel APIThe Travel API from Skedulo — 1 operation(s) for travel.49.8 PeopleSoft Expenses APIDelivered REST API endpoints for expense report management including fetching expense reports by status, cr...49.4 SAP Concur APIAPIs for travel and expense management including expense reporting, travel booking, and invoice processing.49.3 Diners Club International Customer ServiceDiners Club International customer service capability offered to Diners Club franchisees and partners throu...48.7 Discover Airport Lounge & Travel ProgramDiscover Airport Lounge & Travel Program provides exclusive access to premium airport lounges worldwide, of...48.7 Discover ATM LocatorDiscover ATM Locator is a user-friendly tool that allows cardholders to easily find nearby ATMs where they ...48.7 Discover Country AcceptanceDiscover Country Acceptance is a financial institution that specializes in providing loans to individuals i...48.7 Discover Currency ConverterDiscover Currency Converter is a user-friendly tool that allows individuals to easily convert between diffe...48.7 Discover Tip EtiquetteDiscover Tip Etiquette is a platform designed to educate individuals on the proper etiquette and practices ...48.7 Discover Travel GuidesDiscover Travel Guides is a comprehensive travel planning and booking service that helps travelers create u...48.7 Traveloka Connect - Connectivity APIOpenTravel (OTA) 2017B XML connectivity API for channel managers, property-management systems and hotel tec...48.5 Climatiq Travel APIEmissions from passenger travel and accommodation.48.3 CJ Product Search APIGraphQL API for product discovery, product feeds and catalog management across advertiser feeds. Ten querie...47.2 Travel + Leisure RSS FeedsRSS feeds for Travel + Leisure, the brand that also seeds the publicly-traded Wyndham Destinations spin-off.45.7 TripSavvy RSS FeedsRSS feeds for TripSavvy, the travel guides brand.45.7 SK Telecom Puzzle Domestic Travel APIDomestic travel analytics — traveller volume by destination, in-region dwell time, and traveller characteri...43.8 Airbnb Webhooks APIThe Airbnb Webhooks API enables connectivity partners to receive real-time notifications when events occur ...43.6 Perk Travel & Spend APIREST API for Perk travel, expense, invoice, trip, cost-center, event, and card data. Authenticate with an a...43.4 Concur Travel Receipts APIExposes receipt requests to inform E-Receipt partners which E-Receipts to send to SAP Concur and for which ...43.0

Thin 43 Limited public surface area

Sabre Air Booking APISabre Air Booking API enables flight booking, passenger name record (PNR) creation and management, seat sel...38.8 Sabre Booking Management APISabre Booking Management API provides unified management of multi-segment travel reservations including fli...38.8 Sabre Cars APISabre Cars API provides car rental search, availability, rate shopping, reservation, and management APIs fo...38.8 Sabre Destination Content APISabre Destination Content API provides destination guides, points of interest, geo data, and travel inspira...38.8 Sabre Rail APISabre Rail API provides rail ticket search, booking, and management capabilities connecting to over 30 rail...38.8 Famxplor Family Travel APIThe First API 100% Dedicated to Family Travel. Designed for developers, travel apps, and businesses, the Fa...38.4 Country Information PagesPer-country pages covering entry/exit requirements, local laws, safety, health, and U.S. embassy contacts.38.1 Smart Traveler Enrollment Program (STEP)Voluntary enrollment system for U.S. citizens traveling or residing abroad to receive embassy alerts.38.1 State Department Travel AdvisoriesCountry-by-country travel advisories (Levels 1-4) issued by the Bureau of Consular Affairs, with RSS distri...38.1 Travel Advisories APIThe State Department publishes travel advisory levels (Level 1-4) for every country. The machine-readable s...38.1 WestJet Direct Connect APIWestJet's IATA New Distribution Capability (NDC) direct-connect interface for travel sellers, offered in ND...37.9 Rakuten Travel Area Class APIReturns Rakuten Travel's hierarchical Japanese area classification (prefecture / region / detail), used to ...36.1 Rakuten Travel Hotel Chain List APIReturns the list of hotel chains available on Rakuten Travel, used to scope searches to a specific brand.36.1 Rakuten Travel Hotel Detail Search APIReturns full hotel detail records including amenities, addresses, images, and access information for one or...36.1 Rakuten Travel Hotel Ranking APIReturns top-ranked Rakuten Travel hotels by area and category for trend, bestseller, and recommendation dis...36.1 Rakuten Travel Keyword Hotel Search APIFull-text keyword search across Rakuten Travel hotel inventory, with filters for area, price, and rating.36.1 Rakuten Travel Simple Hotel Search APILightweight keyword and area search over Rakuten Travel's Japanese hotel inventory, returning hotel name, l...36.1 Rakuten Travel Vacant Hotel Search APISearches for hotels with vacancy for given check-in and check-out dates, party composition, and budget filt...36.1 Grab For Business Partner APIThe Grab For Business Partner API supports corporate travel, expense, and HR platforms that need to provisi...31.8 SAP Concur Travel APIREST API for managing travel itineraries, bookings, and travel profiles. Supports searching for travel opti...30.3 Southwest Airlines Flight APIThe Southwest Airlines internal flight booking API powers the southwest.com website for searching and booki...30.1 HelloSafe Travel Insurance APIREST API for travel-insurance reference data, quoting, tracked link minting, and signed conversion postback...30.0 eAPIS — Advance Passenger Information SystemA CBP web-based application for commercial and private carriers to electronically submit inbound and outbou...27.6 Property Data APIThe Starwood Property Data API provided detailed information about individual hotel properties including ro...27.4 SPG Loyalty APIThe Starwood Preferred Guest (SPG) Loyalty API provided programmatic access to the SPG loyalty program, ena...27.4 EHI Rental APIsThe Rental business line of the EHI API Marketplace, covering Enterprise Rent-A-Car's network of neighborho...27.3 Persefoni Integration HubPersefoni's Integration Hub connects the CMAP platform to enterprise systems so emissions-relevant activity...27.2 Compare Beaches Around the WorldBeach Information gives you searchable beach records, local rules, amenities, conditions, and tide forecast...26.8 Find & Compare Film Festivals Around the WorldFestival Listings gives you searchable data on festivals, their categories, countries, deadlines, dates, fe...26.8 Find Nearby Places in US by Category APISearch places by category around a latitude and longitude, with optional radius and result limits. Useful f...26.8 Find Nearby places In US APIFind places near a latitude and longitude, with optional radius and result limit. Useful for local search, ...26.8 Find US Places in Bounding Box APIFind places inside a latitude-longitude box, with optional result limits. Useful for map search, regional f...26.8 Oracle Expenses APIAPI for managing employee expenses, expense reports, and reimbursements.26.8 Public Holidays APIGet public holidays by country and year, plus the supported country list. Use it for business-day logic, sc...26.8 Retrieve NOAA Weather Alerts APIFetch active NOAA weather alerts for a two-character area code. Useful for dashboards, notifications, and l...26.8 Retrieve NOAA Weather Point Metadata APILook up NOAA point metadata from latitude and longitude. Useful for coordinate-based location enrichment an...26.8 Search US Places APISearch places with a query string and optional result limit. Useful for place lookup, map search, and locat...26.8 US Reverse Location Lookup APIReverse geocode lat/lon coordinates with an optional search radius. Get a flexible JSON result for map, del...26.8 Flix APIThe partner-facing Flix API, published through the Flix Developer Portal. Documentation covers API referenc...26.7 trivago Hotel Search (MCP + direct API)Public Model Context Protocol connector (search_hotels) plus an invite-only direct hotel-search API deliver...26.4 Travelport TripServices Flights APIRESTful JSON API providing end-to-end air travel workflows including search, price, book, ticket, cancel, a...26.2 Travelport TripServices Pay APIRESTful JSON payments API enabling online travel agencies to perform credit card authorizations, address va...26.2 Travelport TripServices Stays APIRESTful JSON API for hotel search, availability, rules, reservation management, and modification across 180...26.2

Emerging 17 Early or largely undocumented

MyRealTrip Partner APIMarketing-partner REST API for MyRealTrip. Search flights (domestic and international, lowest-fare calendar...26.0 Groupon Tours and Attractions APIREST contract connecting a tours, activities and attractions reservation system to Groupon's point of sale,...24.9 Turneo v2 APIREST booking API for searching experiences, retrieving options and availability, and assembling and confirm...24.5 Worldia APIWorldia production REST API. An API Platform (Symfony) deployment that content-negotiates application/vnd.w...23.7 Delta API SuiteThe Delta API Suite is a partner-facing collection of APIs covering flight search, flight offers and order ...23.6 CTM Portal Host APIThe private back-end API for CTM Portal, CTM's single sign-on customer portal. It is not documented, not an...22.8 Trainline Global APITrainline Partner Solutions' wholesale rail and coach distribution API, sold to travel sellers, OTAs, TMCs ...22.7 Rome2Rio Autocomplete APIThe Rome2Rio Autocomplete API provides place-name suggestions as a user types, returning a ranked list of m...21.1 Rome2Rio Geocode APIThe Rome2Rio Geocode API resolves a place-name or address string to a canonical Rome2Rio place record with ...21.1 Rome2Rio Search APIThe Rome2Rio Search API returns multi-modal door-to-door travel routes between any origin and destination w...21.1 Darwinbox APIREST API for Darwinbox HRMS covering employee management, attendance, recruitment, organizational managemen...20.8 TourRadar Distribution APIUnified B2B API giving platforms, travel agencies, airlines, and GDSs access to TourRadar's network of 2,50...20.1 Breeze Airways NDC GatewayThe Breeze Airways NDC gateway is the airline's direct-connect distribution API for accredited travel partn...19.1 PeopleSoft Expenses APIREST API for expense reporting, reimbursements, and travel management.17.7 Blockskye APILive production API host operated by Blockskye, discovered by probe. The host answers as a Fastify service ...14.9 Tuniu Open Platform APITuniu Open Platform (途牛开放平台) supplier and retail-partner integration API. Suppliers publish and manage trav...14.0 9flats APIThe 9flats read API over the marketplace's listing data: search places, fetch a place with its photos, pric...11.2

Minimal 3 Almost no public developer surface

SnapTravel Partner Search APIThe partner-facing hotel search API operated by Super.com under its original SnapTravel brand. The host is ...9.5 Travel Journey API PlatformPlatform of APIs supplying travel and journey intelligence derived from BT's network and Active Intelligenc...8.5 Corpay Workforce Lodging & TravelCorpay's lodging and corporate travel offering for workforces with project, crew, and contractor lodging ne...6.0

Companies reaching this through an API (20)

These companies publish an API, specification or operation carrying “Travel” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.

Score breakdown

Frequency

72.2

log-scaled weighted occurrences

Breadth

9.5

spread across providers

Quality lift

21.9

mean composite of providers using it

Cohesion

25.5

strength of nearest seed neighbor

Where this tag comes from

Provider tag344

Api tag94

Openapi tag2

Openapi op tag4

Cohort brief

Auto-generated

The 322 providers in the APIs.io catalog tagged Travel, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers

322

of 344 on the roster

Mean Kin Score

19.6

-4.3 vs catalog 23.9

Mean Agent Readiness

9.9

-2.1 vs catalog 12

Spread

1.5–69.3

median 13.8 · σ 14.5

How the 322 split by band

Exemplar 1Strong 6Developing 31Thin 58Emerging 108Minimal 118

Facet averages, against the whole catalog

Facet	This cohort	Catalog	Difference	Scored
Contract Governance	5.5	6.4	-0.9	322
Discoverability	60	61.2	-1.2	322
Access Clarity	22.2	26.5	-4.3	322
Operational Transparency	9.4	14	-4.6	322
Developer Ergonomics	18.4	23.4	-5	322
Contract Quality	13.8	19.8	-6	322

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes

Artifact	This cohort	Catalog	Difference
MCP server (any)	10%	10%	0
MCP server (first-party)	12%	13%	-1
Agent Skills	0%	0%	0
OAuth scopes	10%	11%	-1
Security	96%	97%	-1
Arazzo workflows	2%	2%	0
Governance rules	7%	14%	-7

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score

Work with this as data

Every tag here is available over the APIs.io API and to AI agents over MCP.

MCP server

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Tools for tags

7 MCP tools reach this

find_tagsBrowse and filter every tag in the catalog.
get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

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This tag

curl "https://apis.io/api/v1/tags/travel"

All tags

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As a scored cohort

curl "https://apis.io/api/v1/cohorts/tag/travel"

The distribution (Pro)

curl "https://apis.io/api/v1/cohorts/tag/travel/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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Travel

Providers using this tag (344)

APIs with this tag (92)