The Maritime industry on apis.io holds 73 providers and 447 APIs. Those numbers look healthy until you sort them. The highest Kin Score in the vertical belongs to Tomorrow.io, a Boston weather intelligence platform, at 56.3 and the only provider in the strong band. The ocean carriers that move most of the world’s containers sit near the bottom.
Membership is computed from tags, not a hand-picked list, so the industry reflects who touches the sea, not who owns ships. That is why weather, satellite connectivity and AIS tracking rank above the carriers.
The vertical by function
| Function | Providers (Kin Score) |
|---|---|
| Ocean weather and sensors | Tomorrow.io (56.3), Sofar Ocean (46.7), Xweather (41.7) |
| Fleet and ship management | SERTICA (45.0), Nortech (45.5), SEDNA (40.1) |
| Classification | DNV (45.4) |
| Vessel tracking | VesselFinder (44.8), MarineTraffic (40.5), AISStream (28.9) |
| Carriers | Maersk (43.0), CMA CGM (14.3), Hapag-Lloyd (5.7), MSC (5.4), COSCO Shipping (3.3), Matson (0.6) |
What the numbers say
One carrier publishes. Maersk has 11 APIs and 8 of them published, more than any other carrier here. MarineTraffic is the only provider in the vertical with more published (9 of 14). Every other carrier in the table scores 14.3 or lower, and MSC, ZIM, Ocean Network Express, COSCO and Matson have no APIs in the catalog at all. What is missing is a public, machine-readable contract we can find.
Most of the vertical is empty. 40 of the 73 providers have an API count of zero, and the band split is 1 strong, 11 developing, 8 thin, 15 emerging and 38 minimal. More than half of maritime is a company record with no surface behind it yet. That includes the Federal Maritime Commission at 3.3.
One provider is most of the APIs. SERTICA, RINA’s fleet and ship management system, accounts for 254 of the 447 APIs, about 57 percent. It also says only 1 of them is published. Count maritime APIs and you are mostly counting SERTICA’s per-module contracts, so do not use the total as a measure of depth.
Where to start
If you are building voyage or fleet tooling, start with vessel tracking (VesselFinder, MarineTraffic) and ocean weather (Tomorrow.io, Sofar Ocean), where the contracts are deepest. For booking and shipment events, Maersk is the only carrier with a published surface on the network. For class and certification data, DNV lists a Class Status API and its Vessel Register.
Takeaway
Maritime on apis.io is a vertical served from the edges: weather, sensors, tracking and fleet software are published, and the shipping lines mostly are not. If you run a carrier’s developer program, the bar is Maersk at 43.0, and nobody else is close. Browse the full list at apis.io/industries/maritime/.