AWS Bedrock embedding provider

Uses AWS Bedrock's embedding API for embedding generation. Provides access to Titan and Cohere embedding models on AWS.

Requirements

AWS credentials, either via API key (ABSK format) or IAM credentials.

Option 1: API Key (Recommended)

Uses AWS Bedrock API Key (ABSK format, available since July 2025): - Set BEDROCK_API_KEY environment variable - Or pass api_key => <<"ABSK...">>> in config

Option 2: IAM Credentials

- Set AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, and optionally AWS_SESSION_TOKEN environment variables - Or pass access_key_id, secret_access_key in config

Configuration

   %% Using API key (simpler)
   Config = #{
       api_key => <<"ABSK...">>,                       %% API key (or use env var)
       region => <<"us-east-1">>,                      %% AWS region (default)
       model => <<"amazon.titan-embed-text-v2:0">>,    %% Model ID (default)
       timeout => 30000,                               %% Timeout in ms (default)
       dimension => 1024                               %% Vector dimension (default)
   }.
  
   %% Using IAM credentials (requires SigV4 signing)
   Config = #{
       access_key_id => <<"AKIA...">>,
       secret_access_key => <<"...">>,
       session_token => <<"...">>,                     %% Optional, for temporary credentials
       region => <<"us-east-1">>,
       model => <<"amazon.titan-embed-text-v2:0">>
   }.

Supported Models

- <<"amazon.titan-embed-text-v2:0">> - Default, 1024 dims - <<"amazon.titan-embed-text-v1">> - 1536 dims, legacy - <<"cohere.embed-english-v3">> - 1024 dims, Cohere on Bedrock - <<"cohere.embed-multilingual-v3">> - 1024 dims, multilingual