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Mobile Apps (& CORS Error)

Client-side calls to the Riot API are blocked because there is no way to make them without exposing your API key to users. You will need to set up a backend server that can make API calls while keeping your API key secure. If you want to quickly set up

ids

PUUIDs and Other IDs

The Riot API uses three IDs for players: summoner IDs, account IDs, and PUUIDs. Different APIs use different IDs, and you should use whichever ID is required by the API you are using. Summoner and account IDs are only unique per region, and PUUIDs are unique globally. Because the PUUID

faq

Your Application

You can apply for a personal or production app by clicking “Register Project” on the main dev portal page. Do not apply for a project if you just want to test the API. If you are developing a project or just testing things out, use your development key that Riot