Timebound Iam

Timebound-IAM is an MCP Server that issues short-lived, service-scoped AWS credentials via STS AssumeRole so that AI coding agents (like Claude Code) can access AWS resources without long-lived keys. Credentials are time-bounded (15 minutes to 12 hours), scoped to specific services and access levels (read-only or full), and automatically cleaned up on expiry.

Install

• Homebrew (macOS/Linux)

  brew install builder-magic/tap/timebound-iam
  

• Go install

  go install github.com/builder-magic/timebound-iam@latest
  

• Binary download — Download pre-built binaries from GitHub Releases.

Setup

For the complete installation and setup guide, see https://timebound-iam.com/installation-and-setup.

1. Configure AWS

   Run the setup wizard to generate the IAM trust policy and inline policy for the broker role:

   bin/timebound-iam setup aws
   # or specify a named profile
   bin/timebound-iam setup aws --profile my-profile
   

   Follow the printed instructions to create the timebound-iam-broker IAM role in your account with the generated policies.

2. Add to Claude Code

   Register the MCP server so Claude Code can request temporary credentials on demand:

   claude mcp add --scope user timebound-iam -- timebound-iam serve
   

   Restart Claude Code to pick up the new server.

3. Verify

   Verify that the MCP server is installed and running with the /mcp command:

   Test the credential flow end-to-end:

   timebound-iam test
   

   This requests short-lived S3 read-only credentials and writes them to a temporary .env file you can use to verify access.

CLI Usage

Timebound-IAM can also be used as a standalone CLI to wrap shell scripts with scoped, temporary credentials.

1. exec

   Runs a command with temporary credentials injected into its environment:

   timebound-iam exec -s s3:full,cloudfront:full -t 30m --profile prod -- ./deploy.sh
   

   Use --dry-run to validate flags without requesting credentials. Use --no-confirm to skip the interactive prompt in CI or scripts.

2. env

   Prints export or unset statements for use with eval:

   eval "$(timebound-iam env -s s3:ro -t 15m --no-confirm)"
   aws s3 ls
   eval "$(timebound-iam env --unset)"
   

3. Scopes

   Scopes use the format service:level where level is ro (read-only) or full. Multiple scopes can be comma-separated or passed as repeated -s flags:

   -s s3:ro,dynamodb:full
   -s s3:ro -s dynamodb:full
   

Contributing

Contributions in any form (suggestions, bug reports, pull requests, and feedback) are welcome. If you've found a bug, you can submit an issue or email me at rsingh@builder-magic.com.

License

This project is licensed under the Apache License, Version 2.0.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be licensed under the Apache License, Version 2.0, without any additional terms or conditions.

Contact: rsingh@builder-magic.com