Content items in Bedrock converse requests don't include "type" property

[twastvedt]

I'm trying to use the bedrock SDK to generate an IChatClient to use alongside other chat clients using Microsoft.Extensions.AI. Something like:

var client = new AmazonBedrockRuntimeClient(
    new BasicAWSCredentials("", ""),
    new AmazonBedrockRuntimeConfig()
    {
        ServiceURL = myEndpoint,
    }).AsIChatClient("claude-sonnet-4-20250514");

var response = await client.GetResponseAsync(
    [new ChatMessage(ChatRole.User, "Who are you?")],
    new() { MaxOutputTokens = 1000 });

The request generated when I call GetResponseAsync doesn't seem to match the AWS bedrock API. Specifically, the messages in the content list do not include a type property:

{"inferenceConfig":{"maxTokens":1000},"messages":[{"content":[{"text":"Who are you?"}],"role":"user"}],"system":[]}

Based on the API I'd expect to see "type": "text" alongside the "text" property there. The response I get is:

Failed to invoke Bedrock endpoint: operation error Bedrock Runtime: InvokeModel, https response error StatusCode: 400, RequestID: xxx, ValidationException: messages.0.content.0.type: Field required

I suspect I'm doing something wrong, but can't figure out what! I'm targeting an instance of bedrock that I don't directly control, so the issue could be with how it's set up. I'll check with those who set it up, but they aren't familiar with this .NET SDK, so I want to check I'm not missing something on my end.

[twastvedt]

Ahah. Yep, as I suspected, my ignorance. I was trying to interact with a legacy invoke endpoint using the converse APIs - doesn't work!