Introduction

This error usually surprises people because they are using DynamoDB Local and assume AWS credentials should not matter. The important detail is that the SDK still tries to resolve credentials unless you explicitly provide them, even when the endpoint points to a local DynamoDB instance.

Why credentials are still requested for DynamoDB Local

When you connect to DynamoDB Local from Node.js, you are still using the AWS SDK client stack. That stack normally uses its credential provider chain, which checks environment variables, shared config files, profiles, and other providers.

If none of those sources produces credentials, you get an error like:

Could not load credentials from any providers

For DynamoDB Local, the credentials do not need to be real AWS credentials. They usually just need to exist so the SDK can initialize the client and sign requests consistently.

Fix it by supplying dummy credentials explicitly

With the AWS SDK for JavaScript v3, the cleanest local configuration is to set:

• a local endpoint
• a region
• static fake credentials

1import { DynamoDBClient } from "@aws-sdk/client-dynamodb";
2
3const client = new DynamoDBClient({
4  region: "us-east-1",
5  endpoint: "http://localhost:8000",
6  credentials: {
7    accessKeyId: "local",
8    secretAccessKey: "local",
9  },
10});

These values do not need to correspond to a real AWS account when you are talking only to DynamoDB Local.

Example with DynamoDBDocumentClient

Many applications use the document client wrapper instead of the low-level client:

1import { DynamoDBClient } from "@aws-sdk/client-dynamodb";
2import { DynamoDBDocumentClient, PutCommand } from "@aws-sdk/lib-dynamodb";
3
4const baseClient = new DynamoDBClient({
5  region: "us-east-1",
6  endpoint: "http://localhost:8000",
7  credentials: {
8    accessKeyId: "local",
9    secretAccessKey: "local",
10  },
11});
12
13const docClient = DynamoDBDocumentClient.from(baseClient);
14
15await docClient.send(
16  new PutCommand({
17    TableName: "Users",
18    Item: {
19      id: "123",
20      name: "Ana",
21    },
22  })
23);

If the credentials block is missing, local requests may fail before they even reach the local endpoint.

Environment variables also work

If you do not want credentials in code, you can provide them through environment variables:

export AWS_ACCESS_KEY_ID=local
export AWS_SECRET_ACCESS_KEY=local
export AWS_REGION=us-east-1

Then create the client with only the local endpoint:

1import { DynamoDBClient } from "@aws-sdk/client-dynamodb";
2
3const client = new DynamoDBClient({
4  endpoint: "http://localhost:8000",
5  region: "us-east-1",
6});

This is often a cleaner setup for local development because it keeps the local code path closer to how cloud credentials are injected in other environments.

Compare SDK v2 and v3

For the older AWS SDK v2, the idea is the same:

1const AWS = require("aws-sdk");
2
3const dynamodb = new AWS.DynamoDB({
4  region: "us-east-1",
5  endpoint: "http://localhost:8000",
6  accessKeyId: "local",
7  secretAccessKey: "local",
8});

The error message is similar because both SDK generations still want credentials from somewhere.

If you are reading examples online, make sure you know whether they use v2 or v3. The configuration shape differs even though the local-development idea is the same.

Make sure the local endpoint is correct

Not every credentials error is actually a credentials problem. Check that DynamoDB Local is running and reachable too:

java -jar DynamoDBLocal.jar -sharedDb -port 8000

If the endpoint is wrong or the server is not running, you may fix the credentials and still fail on connection. Local DynamoDB setup usually needs all three pieces aligned:

• endpoint
• region
• credentials source

Keep local and cloud configuration separate

It is a good idea to isolate the local configuration path explicitly so fake credentials do not leak into production logic.

1const isLocal = process.env.DYNAMODB_LOCAL === "true";
2
3const client = new DynamoDBClient({
4  region: "us-east-1",
5  endpoint: isLocal ? "http://localhost:8000" : undefined,
6  credentials: isLocal
7    ? { accessKeyId: "local", secretAccessKey: "local" }
8    : undefined,
9});

That makes the intent obvious and reduces the chance of using local-only settings against real AWS resources.

Common Pitfalls

The biggest mistake is assuming DynamoDB Local means "no credentials are needed at all." The SDK still wants a credentials source unless you configure it explicitly.

Another issue is setting the local endpoint but forgetting the region. Some SDK code paths expect a region even when the database is local.

Developers also mix v2 and v3 examples and then wonder why configuration fields are being ignored. The client constructors are different.

Finally, do not treat every failure as a credentials problem. If the local server is not running or the port is wrong, adding fake credentials alone will not solve the connection.

Summary

• DynamoDB Local still often requires the AWS SDK to resolve credentials.
• Fake static credentials are usually fine for local use.
• Set the local endpoint, region, and credentials together.
• Environment variables are a clean alternative to hardcoding dummy credentials.
• Keep local-only DynamoDB settings separate from real AWS configuration.