[Learning Notes][Golang] Authorization Challenges in the AI Agent Era: What is ID-JAG and Why I Re-implemented It in Go
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Golang implementation of ID-JAG for AI agent authorization, directly relevant to AI agent orchestration and security.
![[Learning Notes][Golang] Authorization Challenges in the AI Agent Era: What is ID-JAG and Why I Re-implemented It in Go](https://foursignals.dev/assets/wire/editions/2026-07-28/621d4812b153b61c-hero.webp)
ID-JAG (Identity Assertion JWT Authorization Grant) is an emerging IETF draft authorization mechanism that lets AI agents act on behalf of users with scoped, short-lived tokens, preventing the risks of shared master keys or leaked user sessions. Built on OAuth2 token exchange (RFC 8693), it consolidates authorization at SSO login so agents can exchange identity assertions for new tokens without repeated user prompts. The author re-implemented the MCP server in Go to demonstrate the flow, including downscoping permissions at each hop to enforce least privilege.