You are putting together a shortlist of strong APIs from Central and Eastern Europe. You open the region page on apis.io and see 77 providers publishing 565 APIs across Poland, Czechia, Hungary, Romania, the Balkans and the post-Soviet states. It looks like a tidy map, so you start reading it as a list of who is there.
Before you do, the region page tells you how the map is built. A provider joins through a tag, a name pattern, or a stated headquarters. The page calls it "a map of stated headquarters, not of markets served." Of the 77, 43 joined by tag, 16 by name and 24 by stated HQ. That means the way a company got onto the map says a lot about whether you would find it by the route you were planning to take.
So you look at the top. Four providers score strong or exemplar. Infobip leads at 84.9 and is exemplar, with 6 APIs. ZnanyLekarz is also exemplar at 74.3 with 11. Raiffeisenbank (Russia) is strong at 63.2 with 113 APIs, and Braiins is strong at 61.5 with 19. Then come Avito at 51.7, Oxylabs at 50.6, SEON at 43.9 and the University of Warsaw at 43.1, all developing.
Here is where you might have gone wrong. If you had filtered by stated headquarters, you would have found only one of those four: Braiins. Infobip, the highest score in the region, describes itself as headquartered in Vodnjan, Croatia. Its description names Croatia, yet the HQ pattern did not match it, and only its tag put it in the region. The post is plain about the consequence: if a provider had neither the tag nor a matched pattern, it would not appear here at all.
That is the turn in this story, and it is the catalog's own record. APIs.io filed a miss against itself. The companies that did get in by stated HQ score lower than the region's leaders. The 24 admitted that way break down as 1 strong, 4 developing, 4 thin, 1 emerging, 13 minimal and one unscored, and together they list 107 APIs. After Braiins, Oxylabs in Lithuania and SEON in Hungary are the best of them, and both score developing. Infobip, at 84.9, should be in that group and is not.
Next you look at the bottom of the list. The region has 43 providers in the minimal band, and 21 of them list exactly one API. Most of those are state data portals: data.gov.ua, Croatia's data.gov.hr, Bulgaria's data.egov.bg, Slovenia's OPSI, Hungary's Kozadat, and open-government entries for Poland, Czechia and Romania. Procurement tender feeds for Hungary, Poland, Romania and Ukraine, the Czech National Bank and the National Bank of Poland make up much of the rest. The post calls these real public APIs with very little published about them.
You also notice that API count and score do not move together. The University of Warsaw lists 152 APIs, the most in the region, and scores 43.1. Raiffeisenbank (Russia) lists 113 and scores 63.2, because 106 of its 113 are published contracts. The university has 3. The region's two largest surfaces differ mainly in how much of each is machine-readable. And 30 of the 77 list no APIs at all, including Rimac Automobili, DappRadar and Estateguru.
What you take away is practical. Central and Eastern Europe has a few strong commercial APIs in messaging, healthcare booking, banking and bitcoin mining, a large group of public data portals, and a gap between them. To see the region's best APIs, filter by tag, not headquarters, or you will miss the leader. And if your work is helping the long tail, start with the portals: the post says one published contract would move most of them out of minimal.
Read the original: https://apis.io/2026/11/13/central-and-eastern-europe-has-77-providers-and-its-headquarters-signal-missed-the-leader/