Bedrock AgentCore Gateway enables on-behalf-of token exchange for multi-tenant agents
TL;DR
AWS ML Blog published a guide on implementing on-behalf-of token exchange for multi-tenant agents with Amazon Bedrock AgentCore Gateway.
What changed
Amazon Bedrock AgentCore Gateway now includes on-behalf-of token exchange for multi-tenant agents.
This update lets agents manage user-specific tokens securely in shared setups.
Vibe Builders and Developers can apply the exchange directly when configuring their agent instances.
Why it matters
Basic Users running agents for multiple tenants gain simpler permission isolation in practice compared to manual token flows in frameworks like LangChain.
Developers building enterprise support agents see fewer credential exposure points during daily operations across client accounts.
What to watch for
Test the new exchange against direct token handling in standard Bedrock agents as an alternative.
Verify by running a sample multi-tenant query through the gateway and checking token isolation logs for each user session.
Who this matters for
- Vibe Builders: Configure AgentCore Gateway to handle multi-tenant user tokens without writing custom auth code.
Harsh’s take
AWS is quietly fixing the plumbing that makes enterprise AI agents actually viable in production. Handing raw API keys or user tokens to LLM agents has been a security nightmare, forcing teams to write fragile middleware. By embedding on-behalf-of token exchange directly into the Bedrock AgentCore Gateway, AWS removes a massive integration hurdle.
This is not a flashy feature, but it is exactly what enterprise builders need to ship multi-tenant applications. If you are building SaaS agents that need to access user-specific data sources securely, migrate to this gateway setup immediately instead of maintaining custom token-rotation scripts.
by Harsh Desai
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