0n3
MCP servers · AWS · MCP server

Connect Codex CLI to AWS

One line gives Codex CLI your AWS account as tools: 5 endpoints, s3, send email, lambda, called with your own connection. No key in the prompt, a receipt for every call, revoke Codex CLI's access alone any time.

Get the line for Codex CLIConnect AWS first

Three steps

  1. Create a free 0n3 account and connect AWS. Paste a key or sign in; it lands in your vault, encrypted.
  2. Install 0n3 into Codex CLI. OpenAI's terminal agent reads 0n3 over Streamable HTTP with a token from your environment.
  3. Ask Codex CLI: whoami. Then: "List customers in AWS".
Put the token in your environment
export ON3_TOKEN="<your 0n token>"

Add it to your shell profile so Codex finds it next time.

The line above carries a placeholder; 0n3.app/install mints a real key named for Codex CLI and fills it in.

What Codex CLI can then do in AWS

S3 · S3 storage operations0
S3 storage operations
Send email · Send email via SES0
Send email via SES
Lambda · Lambda function management0
Lambda function management
More · Everything else this app exposes.5
List bucketsGET /
List objectsGET /{bucket}
Put objectPUT /{bucket}/{key}
Get an objectGET /{bucket}/{key}
Delete an objectDELETE /{bucket}/{key}

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Codex CLI with other apps

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