Localstack MCP Server runs on your own machine — the client starts it, so there is no endpoint to ping. 364 installs a week from npm. Last commit 30 Oct 2026.
A LocalStack MCP Server providing essential tools for local cloud development & testing
What the code does
We read the source, 2 d ago · rules 995398eba69f
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
return existsSync("/.dockerenv");
const child = spawn(command, args, { ...spawnOptions });
path.join(directory, samTemplateFile),
const DOCKER_SOCKET_CONTAINER_PATH = "/var/run/docker.sock";
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
This code can reach further than it looks
We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.
Connect this server
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add localstack-mcp-server -e 'LOCALSTACK_AUTH_TOKEN=<LOCALSTACK_AUTH_TOKEN>' -- npx -y @localstack/localstack-mcp-server{
"mcpServers": {
"localstack-mcp-server": {
"command": "npx",
"args": [
"-y",
"@localstack/localstack-mcp-server"
],
"env": {
"LOCALSTACK_AUTH_TOKEN": "<LOCALSTACK_AUTH_TOKEN>"
}
}
}
}[mcp_servers.localstack-mcp-server]
command = "npx"
args = ["-y", "@localstack/localstack-mcp-server"]
env = { LOCALSTACK_AUTH_TOKEN = "<LOCALSTACK_AUTH_TOKEN>" }{
"mcpServers": {
"localstack-mcp-server": {
"command": "npx",
"args": [
"-y",
"@localstack/localstack-mcp-server"
],
"env": {
"LOCALSTACK_AUTH_TOKEN": "<LOCALSTACK_AUTH_TOKEN>"
}
}
}
}{
"servers": {
"localstack-mcp-server": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@localstack/localstack-mcp-server"
],
"env": {
"LOCALSTACK_AUTH_TOKEN": "<LOCALSTACK_AUTH_TOKEN>"
}
}
}
}Put your own value in place of
<LOCALSTACK_AUTH_TOKEN> (LocalStack Auth Token (required for all LocalStack MCP tools)).
The author’s registry entry marks it as required.
Optional settings from the registry entry, left out of the block above:
AWS_ACCESS_KEY_ID (Source AWS access key used by AWS Replicator to read external AWS resources), AWS_SECRET_ACCESS_KEY (Source AWS secret access key used by AWS Replicator to read external AWS resources), AWS_SESSION_TOKEN (Optional source AWS session token used by AWS Replicator for temporary credentials), AWS_DEFAULT_REGION (Source AWS region used by AWS Replicator), AWS_REPLICATOR_SOURCE_AWS_ACCESS_KEY_ID (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), AWS_REPLICATOR_SOURCE_AWS_SECRET_ACCESS_KEY (Optional Replicator-specific source AWS secret access key. Use with AWS_REPLICATOR_SOURCE_AWS_ACCESS_KEY_ID), AWS_REPLICATOR_SOURCE_AWS_SESSION_TOKEN (Optional Replicator-specific source AWS session token for temporary credentials), AWS_REPLICATOR_SOURCE_REGION_NAME (Optional Replicator-specific source AWS region. Use with the AWS_REPLICATOR_SOURCE_* credential group), AWS_REPLICATOR_SOURCE_ENDPOINT_URL (Optional Replicator-specific source AWS endpoint URL for advanced source-account scenarios), APP_INSPECTOR (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).
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Localstack MCP Server — questions
Answers built from our own checks of this server.