Error: dynamodb local could not load credentials from any providers

The SDK signs DynamoDB Local requests, so it still needs a Region and credentials. Local accepts dummy credential values; these must be paired with an explicit local endpoint, not an AWS service endpoint.

import { DynamoDBClient } from "@aws-sdk/client-dynamodb";

const client = new DynamoDBClient({
  endpoint: "http://localhost:8000",
  region: "us-east-1",
  credentials: { accessKeyId: "local", secretAccessKey: "local" },
});

If the application runs in another Docker container, localhost is that container. Use the DynamoDB service's container-network hostname instead. Ensure the Local process is listening before diagnosing credentials.

Keep this configuration restricted to local development. For real AWS tables, use a profile or IAM role. See the local setup guide and AWS DynamoDB Local documentation.