NPLN Servers

NPLN provides modern game services through gRPC. The decompiled protobuf files can be found here.

The NPLN server is at https://<tenant id>.lp1.t.npln.srv.nintendo.net. The tenant id is always t-<server id>-lp1.

Metadata

The following metadata fields may be included in requests:

Field	Description
`authorization`	`bearer <access token>`
`npln-tenant-id`	Tenant id (like `t-e1c218b5-lp1`)
`uid`	User id (like `u-qtb6z4jkvrndteijghom`)

The npln-tenant-id field is always required. The authorization and uid fields are only required if the request requires authorization.

If the metadata is invalid, the server returns status code 12 (Unimplemented) on production servers, or 14 (Unavailable) on development servers.

The official library sets the user agent to grpc-c++/1.31.1 grpc-c/11.0.0 (nintendo; chttp2).

Services are never modified in a backward incompatible way, but new methods and services may be added in the future.

Splatoon 3 also implements some custom services:

Pokemon Scarlet and Violet implement custom services as well:

Game	Tenant ID
Bayonetta 3	`2c06a4d3`
Hamster Playground	`b9dd3510`
Monster Hunter Rise	`e1c218b5`
Monster Hunter Rise Demo	`f124d2cb`
Monster Hunter Rise: Sunbreak Demo	`bc33b7d4`
Pokemon Legends: Arceus	`e047112f`
Pokemon Scarlet & Violet	`50e39f8f`
Splatoon 3	`dce9377b`
Splatoon 3: Splatfest World Premiere	`156eef4e`
Super Mario Bros. Wonder	`ba973ec6`
Super Mario Party Jamboree	`adf89f68`