Postman details how Agent Mode serves 40 million developers on Amazon Bedrock

AWS published its account of Postman Agent Mode's architecture on October 9, 2026. Postman says Agent Mode serves 40 million developers and runs on Amazon Bedrock. The company says managed access to foundation models through Bedrock lets it scale without operating its own model-serving infrastructure.

Postman identifies tool selection and context preparation as central design challenges. In its testing, tool-selection errors increased when the visible toolset exceeded approximately 40 tools. Its root agent therefore narrows a catalog of more than 170 tools to about 15 relevant tools for each request. For structured data, the system uses schema-based queries; dedicated context handlers distill application entities, while a retrieval-augmented knowledge base selects feature articles based on the query and available context.

The reported controls include user approval before actions that modify application state, including requests sent in the background without an open tab. Postman also uses Amazon Bedrock Guardrails to redact personally identifiable information before it reaches the underlying model, with an option for enterprise admins to enable the setting in Agent Mode. The system uses Amazon Bedrock cross-Region inference, with geographic or global profiles available depending on throughput and geographic-processing requirements. Postman says zero data retention is configured for supported models, but availability and behavior vary by model.