stale · 0.0 market

Ancillaries

Score 9.8 / 100 2 providers +6 via APIs 8 APIs Search apis.io →

Providers using this tag (2)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Emerging 1 Early or largely undocumented

easyJetTravelUnited KingdomAviationAirline1 API14.2

Minimal 1 Almost no public developer surface

Jet2TravelUnited KingdomAviationAirline6.7

APIs with this tag (8)

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 →

Developing 2 Usable, with meaningful gaps to close

Virgin Atlantic NDC SeatAvailability APIIATA NDC 21.3 SeatAvailability message. Returns the seat map and seat pricing for an offer or an existing o...45.0 Virgin Atlantic NDC ServiceList APIIATA NDC 21.3 ServiceList message. Returns the ancillary services available against an offer or an order, s...45.0

Thin 5 Limited public surface area

Duffel Ancillaries APIThe Ancillaries API from Duffel — 2 operation(s) for ancillaries.35.3 Air Canada NDC SeatAvailability APIIATA NDC 17.2 SeatAvailability message pair (SeatAvailabilityRQ / SeatAvailabilityRS). Returns seat maps wi...32.3 Air Canada NDC ServiceList APIIATA NDC 17.2 ServiceList message pair (ServiceListRQ / ServiceListRS). Returns the optional and ancillary ...32.3 HTS Fintech Ancillaries (Cancel for Any Reason, Disruption Assistance, Seat Upgrades)Proprietary fintech ancillaries that partners attach to their bookings — Cancel for Any Reason (airlines an...31.7 Qantas Distribution Platform NDC XML APIThe Qantas Distribution Platform (QDP) is Qantas' NDC XML API for airline retailing — shopping, offer and o...29.9

Emerging 1 Early or largely undocumented

Jetstar APIThe Jetstar API is Jetstar's direct-connect distribution channel for Registered Travel Agents and partners....23.9

Companies reaching this through an API (6)

These companies publish an API, specification or operation carrying “Ancillaries” 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.

Air Canada Duffel Hopper Jetstar Qantas Virgin Atlantic

Score breakdown

Frequency

28.2

log-scaled weighted occurrences

Breadth

0.1

spread across providers

Quality lift

11.8

mean composite of providers using it

Cohesion

2.5

strength of nearest seed neighbor

Where this tag comes from

Api tag8

Provider tag2

Openapi tag1

Openapi op tag2

Work with this as data

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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/ancillaries"

All tags

curl "https://apis.io/api/v1/tags?limit=25"

As a scored cohort

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

The distribution (Pro)

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

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