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mcp/harbor
Grok

s3 for Grok

com.pulsemcp/s3

MCP server for AWS S3 with fine-grained tool control and S3-compatible endpoint support.

client:Grok transport:stdio runtime:npm

Install s3 in Grok

.mcp.json (in your project root)

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

{
  "mcpServers": {
    "s3": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "s3-aws-mcp-server"
      ],
      "env": {
        "AWS_ACCESS_KEY_ID": "<AWS_ACCESS_KEY_ID>",
        "AWS_SECRET_ACCESS_KEY": "<AWS_SECRET_ACCESS_KEY>",
        "AWS_REGION": "<AWS_REGION>",
        "AWS_ENDPOINT_URL": "<AWS_ENDPOINT_URL>",
        "S3_FORCE_PATH_STYLE": "<S3_FORCE_PATH_STYLE>",
        "S3_BUCKET": "<S3_BUCKET>",
        "S3_ENABLED_TOOLGROUPS": "<S3_ENABLED_TOOLGROUPS>",
        "S3_ENABLED_TOOLS": "<S3_ENABLED_TOOLS>",
        "S3_DISABLED_TOOLS": "<S3_DISABLED_TOOLS>",
        "SKIP_HEALTH_CHECKS": "<SKIP_HEALTH_CHECKS>"
      }
    }
  }
}

Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs

s3 in other clients

s3 MCP server