Astro AI

Postman AI Agent Builder (cataloged in this directory under the name Astro AI) is a platform for building and deploying AI agents that discover, test, and orchestrate API calls — available free to start, with paid plans from $14/user/month (Basic) and $29/user/month (Professional) as of early 2026. It extends Postman's API development platform, used by over 30 million developers and hosting more than 100,000 public APIs in its API Network.

Launched as part of Postman's 2025 AI platform expansion, AI Agent Builder leverages Postman's existing ecosystem of public API collections, documentation, and testing infrastructure. Developers create agents that parse OpenAPI 3.x and GraphQL schemas, authenticate against services using OAuth 2.0, API keys, or bearer tokens, chain multiple API calls with conditional logic, and handle errors — all within Postman's workspace environment. The Public API Network provides structured, documented endpoints from providers including AWS, Stripe, Twilio, Salesforce, and GitHub, giving agents a concrete catalog of integrations without manual configuration.

Key capabilities include natural language API discovery, where agents search the API Network catalog of over 100,000 APIs to find and select appropriate endpoints based on task descriptions; automated request construction, where agents generate valid API calls by parsing OpenAPI specifications and collection documentation; and response handling with JSON schema-based validation. The platform supports both simple single-API agents and complex multi-step workflows coordinating across multiple services with data transformation between steps.

Postman AI Agent Builder integrates with the broader Postman platform, meaning agents benefit from existing monitoring, testing with the Newman CLI runner, and collaboration features. Teams can share agent configurations through Postman workspaces, version control agent logic alongside API collections, and monitor agent performance through Postman's analytics dashboard with metrics on response times, error rates, and usage patterns.

The platform supports agents interacting with REST, GraphQL, WebSocket, and gRPC protocols. Agent configurations can be exported and deployed via Postman's CLI tools or CI/CD integrations with Jenkins, GitHub Actions, and GitLab CI. As of April 2026, Postman continues to expand AI Agent Builder capabilities, with recent updates improving multi-model support and workflow orchestration features. Pricing for paid tiers is billed annually per user, and Enterprise plans with SSO, audit logging, and custom quotas require contacting Postman sales.