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.Net: fix(huggingface): move off retired api-inference.huggingface.co to router.huggingface.co #14667

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.Net: fix(huggingface): move off retired api-inference.huggingface.co to router.huggingface.co #14667

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6d29df2
.Net: fix(huggingface): move off retired api-inference.huggingface.co…
torrresagus Oct 27, 2026
3424681
Merge branch 'main' into fix/huggingface-router
torrresagus Oct 27, 2026
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2 changes: 1 addition & 1 deletion dotnet/samples/Demos/FSharpScripts/huggingFaceChatCompletion.fsx
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Expand Up @@ -20,7 +20,7 @@ let builder =
// TODO: request your API key in your 🤗 hugging face private settings
let API_KEY = "TODO_REPLACE_ME"
let MODEL_ID = "microsoft/Phi-3-mini-4k-instruct" // pick the model you prefer!
let API_URL = $"https://api-inference.huggingface.co/"
let API_URL = $"https://router.huggingface.co/"

let b = Kernel.CreateBuilder().AddHuggingFaceChatCompletion(
MODEL_ID,
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2 changes: 1 addition & 1 deletion dotnet/samples/Demos/TelemetryWithAppInsights/Program.cs
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Expand Up @@ -392,7 +392,7 @@ private static Kernel GetKernel(ILoggerFactory loggerFactory)
{
builder.AddHuggingFaceChatCompletion(
model: TestConfiguration.HuggingFace.ModelId,
endpoint: new Uri("https://api-inference.huggingface.co"),
endpoint: new Uri("https://router.huggingface.co"),
apiKey: TestConfiguration.HuggingFace.ApiKey,
serviceId: HuggingFaceServiceKey);
}
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2 changes: 1 addition & 1 deletion ...rc/Connectors/Connectors.HuggingFace.UnitTests/Services/HuggingFaceChatCompletionTests.cs
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Expand Up @@ -141,7 +141,7 @@ public async Task DefaultAddressShouldBeUsedAsync()
await sut.GetChatMessageContentAsync(chatHistory);

//Assert
Assert.StartsWith("https://api-inference.huggingface.co/", this._messageHandlerStub.RequestUri?.AbsoluteUri, StringComparison.OrdinalIgnoreCase);
Assert.StartsWith("https://router.huggingface.co/v1/chat/completions", this._messageHandlerStub.RequestUri?.AbsoluteUri, StringComparison.OrdinalIgnoreCase);
}

[Fact]
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2 changes: 1 addition & 1 deletion ...nnectors/Connectors.HuggingFace.UnitTests/Services/HuggingFaceEmbeddingGenerationTests.cs
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Expand Up @@ -98,7 +98,7 @@ public async Task ModelUrlShouldBeBuiltSuccessfullyAsync()
await sut.GenerateEmbeddingsAsync([]);

//Assert
Assert.Equal("https://fake-random-test-host/fake-path/pipeline/feature-extraction/fake-model", this._messageHandlerStub.RequestUri?.AbsoluteUri);
Assert.Equal("https://fake-random-test-host/fake-path/models/fake-model/pipeline/feature-extraction", this._messageHandlerStub.RequestUri?.AbsoluteUri);
}

[Fact]
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2 changes: 1 addition & 1 deletion ...onnectors/Connectors.HuggingFace.UnitTests/Services/HuggingFaceEmbeddingGeneratorTests.cs
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Expand Up @@ -98,7 +98,7 @@ public async Task ModelUrlShouldBeBuiltSuccessfullyAsync()
await sut.GenerateAsync([]);

//Assert
Assert.Equal("https://fake-random-test-host/fake-path/pipeline/feature-extraction/fake-model", this._messageHandlerStub.RequestUri?.AbsoluteUri);
Assert.Equal("https://fake-random-test-host/fake-path/models/fake-model/pipeline/feature-extraction", this._messageHandlerStub.RequestUri?.AbsoluteUri);
}

[Fact]
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2 changes: 1 addition & 1 deletion ...t/src/Connectors/Connectors.HuggingFace.UnitTests/Services/HuggingFaceImageToTextTests.cs
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Expand Up @@ -134,7 +134,7 @@ public async Task DefaultAddressShouldBeUsedAsync()
await sut.GetTextContentsAsync(this._imageContentInput);

//Assert
Assert.StartsWith("https://api-inference.huggingface.co/models", this._messageHandlerStub.RequestUri?.AbsoluteUri, StringComparison.OrdinalIgnoreCase);
Assert.StartsWith("https://router.huggingface.co/hf-inference/models", this._messageHandlerStub.RequestUri?.AbsoluteUri, StringComparison.OrdinalIgnoreCase);
}

[Fact]
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2 changes: 1 addition & 1 deletion ...rc/Connectors/Connectors.HuggingFace.UnitTests/Services/HuggingFaceTextGenerationTests.cs
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Expand Up @@ -129,7 +129,7 @@ public async Task DefaultAddressShouldBeUsedAsync()
await sut.GetTextContentsAsync("fake-text");

//Assert
Assert.StartsWith("https://api-inference.huggingface.co/models", this._messageHandlerStub.RequestUri?.AbsoluteUri, StringComparison.OrdinalIgnoreCase);
Assert.StartsWith("https://router.huggingface.co/hf-inference/models", this._messageHandlerStub.RequestUri?.AbsoluteUri, StringComparison.OrdinalIgnoreCase);
}

[Fact]
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7 changes: 4 additions & 3 deletions dotnet/src/Connectors/Connectors.HuggingFace/Core/HuggingFaceClient.cs
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Expand Up @@ -34,7 +34,8 @@ internal HuggingFaceClient(
string? modelId = null,
Uri? endpoint = null,
string? apiKey = null,
ILogger? logger = null)
ILogger? logger = null,
Uri? defaultEndpoint = null)
{
Verify.NotNull(httpClient);

Expand All @@ -44,7 +45,7 @@ internal HuggingFaceClient(
throw new InvalidOperationException("A valid model id or endpoint must be provided.");
}

endpoint ??= new Uri("https://api-inference.huggingface.co");
endpoint ??= defaultEndpoint ?? new Uri("https://router.huggingface.co/hf-inference");
this.Separator = endpoint.AbsolutePath.EndsWith("/", StringComparison.InvariantCulture) ? string.Empty : "/";
this.Endpoint = endpoint;
this.ModelId = modelId;
Expand Down Expand Up @@ -300,7 +301,7 @@ public async Task<IList<ReadOnlyMemory<float>>> GenerateEmbeddingsAsync(
}

private Uri GetEmbeddingGenerationEndpoint(string? modelId)
=> string.IsNullOrWhiteSpace(modelId) ? this.Endpoint : new($"{this.Endpoint}{this.Separator}pipeline/feature-extraction/{modelId}");
=> string.IsNullOrWhiteSpace(modelId) ? this.Endpoint : new($"{this.Endpoint}{this.Separator}models/{modelId}/pipeline/feature-extraction");

#endregion

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3 changes: 2 additions & 1 deletion dotnet/src/Connectors/Connectors.HuggingFace/Core/HuggingFaceMessageApiClient.cs
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Expand Up @@ -73,7 +73,8 @@ internal HuggingFaceMessageApiClient(
modelId,
endpoint,
apiKey,
logger);
logger,
new Uri("https://router.huggingface.co"));
}

internal async IAsyncEnumerable<StreamingChatMessageContent> StreamCompleteChatMessageAsync(
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2 changes: 1 addition & 1 deletion dotnet/src/IntegrationTests/testsettings.json
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Expand Up @@ -68,7 +68,7 @@
"ChatCompletionModelId": "tgi",
"ApiKey": "",
"TextGenerationEndpoint": "http://localhost:8080/",
"EmbeddingEndpoint": "https://api-inference.huggingface.co/",
"EmbeddingEndpoint": "https://router.huggingface.co/hf-inference/",
"ChatCompletionEndpoint": "http://localhost:8080/"
},
"GoogleAI": {
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