Pulumi

Pulumi is an Infrastructure as Code platform that enables teams to define infrastructure using general-purpose programming languages (TypeScript, Python, Go, C#) rather than domain-specific configuration languages like HCL. For agents that provision, update, or manage cloud infrastructure, Pulumi's REST API and Automation API provide programmatic control over infrastructure stacks — triggering updates, previewing changes, reading stack outputs, and monitoring deployment status. The programming language approach means infrastructure logic can be built alongside application logic using the same tooling.

The Pulumi Cloud REST API covers stacks, updates, activity, and organization management. Agents can trigger stack updates, retrieve stack outputs (which expose provisioned resource attributes like URLs and connection strings to downstream consumers), and query deployment history. The Automation API is the more powerful surface for agents that need deep programmatic control — it enables running Pulumi programs from within application code, making infrastructure provisioning an embedded capability rather than a separate CLI operation.

Reliability for Pulumi Cloud is vendor-managed. The state management infrastructure is critical for IaC operations — Pulumi stores resource state in the Pulumi Cloud backend, and loss of state or concurrent state modifications can corrupt infrastructure management. Teams running agents that trigger Pulumi updates should implement concurrency controls to prevent simultaneous stack updates that would conflict.

Authentication uses Pulumi access tokens for the REST API. Organization tokens are appropriate for automation agents; personal tokens should be avoided for service account use. Access tokens control write access to infrastructure stacks, which have direct cloud infrastructure cost and availability implications — these credentials require the same care as cloud provider credentials.

Documentation is comprehensive and developer-focused. The Automation API documentation is particularly thorough and covers the embedded infrastructure provisioning patterns relevant for agent integrations. The REST API reference covers the Pulumi Cloud management operations. Teams building agent-driven infrastructure automation on Pulumi will find the documentation well-suited for the programming-language-native approach.