About
castomAPI is the platform layer of the castomo ecosystem — the account, the wallet and the 706 endpoints that eight products are built on — made in Wrocław by a company small enough to answer its own e-mail.
The company
Castomo prosta spółka akcyjna, ul. Powstańców Śląskich 5/212, 53-332 Wrocław, Polska. Registered in the National Court Register (KRS 0001188843) by the Sąd Rejonowy dla Wrocławia-Fabrycznej we Wrocławiu, VI Wydział Gospodarczy Krajowego Rejestru Sądowego. NIP 8993033031, REGON 542471636, share capital 100 000,00 zł. A prosta spółka akcyjna — the Polish simple joint-stock company — registered in 2025.
What we make
The platform you are reading about, and the products on it: dash-b dashboards, castomUI websites, castomFlow workflows, clickSomo messaging, FABLS content and castoMIND product generation. Also the accessibility compendium at dostepnosc2025.pl, whose scanner is a platform service.
How we work
Zero dependencies where a dependency is not earning its place. Every claim measured before it is written down. Probes against the real third party before code assumes its documentation. No external service the ecosystem could run itself — fonts, tiles, media, monitoring, mail, all in-house. Everything runs on EU infrastructure.
Contact
api@castomo.com reaches the people who build this. More on the contact page →
Notes
castomAPI in one paragraph
One account and one wallet in front of 706 metered endpoints in 48 groups, 30 integrations connected through the customer's own accounts, custom endpoints sandboxed in isolated V8, and 20 platform services — auth, billing, payments, bookings, events, data, queries, monitoring, live collaboration, documents, assets, media, social, chat, accessibility, mail, sites, skills, MCP, OAuth, VPN, tiles. A thousand free tokens a month for everyone; failures never billed.