Yes, Localstack is free to use.

How do I install Localstack?

Localstack is a local plugin. Install it using npm package: @localstack/localstack-mcp-server and add the generated configuration snippet to your AI app's MCP config file. Then restart your AI app.

What credentials does Localstack need?

Localstack requires the following credentials or environment variables: LOCALSTACK_AUTH_TOKEN, AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, AWS_SESSION_TOKEN, AWS_DEFAULT_REGION, AWS_REPLICATOR_SOURCE_AWS_ACCESS_KEY_ID, AWS_REPLICATOR_SOURCE_AWS_SECRET_ACCESS_KEY, AWS_REPLICATOR_SOURCE_AWS_SESSION_TOKEN, AWS_REPLICATOR_SOURCE_REGION_NAME, AWS_REPLICATOR_SOURCE_ENDPOINT_URL, APP_INSPECTOR. You can find setup instructions on the server detail page.

What AI apps work with Localstack?

Localstack uses the Model Context Protocol (MCP) and works with any MCP-compatible AI app, including Claude, ChatGPT / Codex, Gemini, Copilot, Cursor, and more.

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Localstack MCP Server

by Localstack

Developer ToolsModerate6.0MCP RegistryLocal

Free

Server data from the Official MCP Registry

A LocalStack MCP Server providing essential tools for local cloud development & testing

About

A LocalStack MCP Server providing essential tools for local cloud development & testing

Security Report

6.0

Moderate6.0Moderate Risk

This is a well-architected LocalStack MCP server with proper authentication requirements, reasonable permission scopes aligned with its developer tool purpose, and clean code practices. The server requires LOCALSTACK_AUTH_TOKEN for all sensitive operations and appropriately delegates to external CLIs. Minor findings include broad exception handling and some information logging that could be tightened, but these are low-severity and do not meaningfully impact security. Supply chain analysis found 2 known vulnerabilities in dependencies (0 critical, 1 high severity). Package verification found 1 issue.

4 files analyzed · 7 issues found

Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.

Permissions Required

This plugin requests these system permissions. Most are normal for its category.

env_vars

Check that this permission is expected for this type of plugin.

HTTP Network Access

Connects to external APIs or services over the internet.

Shell Command Execution

Runs commands on your machine. Be cautious — only use if you trust this plugin.

File System Read

Reads files on your machine. Normal for tools that analyze or process local data.

File System Write

Writes or modifies files on your machine. Check that this is expected for the tool.

process_spawn

Check that this permission is expected for this type of plugin.

system_info

Check that this permission is expected for this type of plugin.

What You'll Need

Set these up before or after installing:

LocalStack Auth Token (required for all LocalStack MCP tools)Required

Environment variable: LOCALSTACK_AUTH_TOKEN

Source AWS access key used by AWS Replicator to read external AWS resourcesRequired

Environment variable: AWS_ACCESS_KEY_ID

Source AWS secret access key used by AWS Replicator to read external AWS resourcesRequired

Environment variable: AWS_SECRET_ACCESS_KEY

Optional source AWS session token used by AWS Replicator for temporary credentialsRequired

Environment variable: AWS_SESSION_TOKEN

Source AWS region used by AWS ReplicatorOptional

Environment variable: AWS_DEFAULT_REGION

Optional Replicator-specific source AWS access key. Use this instead of AWS_ACCESS_KEY_ID when the Replicator source account should be isolated from generic AWS config.Required

Environment variable: AWS_REPLICATOR_SOURCE_AWS_ACCESS_KEY_ID

Optional Replicator-specific source AWS secret access key. Use with AWS_REPLICATOR_SOURCE_AWS_ACCESS_KEY_ID.Required

Environment variable: AWS_REPLICATOR_SOURCE_AWS_SECRET_ACCESS_KEY

Optional Replicator-specific source AWS session token for temporary credentials.Required

Environment variable: AWS_REPLICATOR_SOURCE_AWS_SESSION_TOKEN

Optional Replicator-specific source AWS region. Use with the AWS_REPLICATOR_SOURCE_* credential group.Optional

Environment variable: AWS_REPLICATOR_SOURCE_REGION_NAME

Optional Replicator-specific source AWS endpoint URL for advanced source-account scenarios.Optional

Environment variable: AWS_REPLICATOR_SOURCE_ENDPOINT_URL

Set to 1 in the LocalStack container environment to enable App Inspector by default across restarts. The MCP tool can also toggle App Inspector at runtime.Optional

Environment variable: APP_INSPECTOR

How to Install

Add this to your MCP configuration file:

{
  "mcpServers": {
    "io-github-localstack-localstack-mcp-server": {
      "env": {
        "APP_INSPECTOR": "your-app-inspector-here",
        "AWS_ACCESS_KEY_ID": "your-aws-access-key-id-here",
        "AWS_SESSION_TOKEN": "your-aws-session-token-here",
        "AWS_DEFAULT_REGION": "your-aws-default-region-here",
        "AWS_SECRET_ACCESS_KEY": "your-aws-secret-access-key-here",
        "LOCALSTACK_AUTH_TOKEN": "your-localstack-auth-token-here",
        "AWS_REPLICATOR_SOURCE_REGION_NAME": "your-aws-replicator-source-region-name-here",
        "AWS_REPLICATOR_SOURCE_ENDPOINT_URL": "your-aws-replicator-source-endpoint-url-here",
        "AWS_REPLICATOR_SOURCE_AWS_ACCESS_KEY_ID": "your-aws-replicator-source-aws-access-key-id-here",
        "AWS_REPLICATOR_SOURCE_AWS_SESSION_TOKEN": "your-aws-replicator-source-aws-session-token-here",
        "AWS_REPLICATOR_SOURCE_AWS_SECRET_ACCESS_KEY": "your-aws-replicator-source-aws-secret-access-key-here"
      },
      "args": [
        "-y",
        "@localstack/localstack-mcp-server"
      ],
      "command": "npx"
    }
  }
}

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About

Security Report

Findings (7)Action required

Permissions Required

What You'll Need

How to Install

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