Phaseo.Sdk package from NuGet.
The local wrapper at packages/sdk/sdk-csharp/Client.cs currently exposes high-level helpers for chat, responses, Anthropic messages, images, audio, embeddings, moderations, files, batches, videos, generations, models/providers/endpoints/organisations/pricing, API-key discovery and lifecycle mutations, workspace/current-key lifecycle helpers, pricing calculation, activity/credits/analytics, health checks, model lifecycle validation, and async-job websocket URLs through both direct helpers and client.AsyncJobs.WebSocketUrl(...).
GetModelEndpointCapabilities(...) returns live provider-route metadata. CheckModelParameters(...) labels each parameter as supported, partial, unsupported, or unknown, validates advertised values and ranges, and returns the routes that accept the complete parameter set.