Postman Plugin for OpenAI Codex

Postman has launched a Codex plugin that integrates Postman agent skills into OpenAI Codex sessions, enabling developers to discover, test, mock, and evaluate APIs through natural-language requests rather than manually using CLI commands. The plugin can be installed either project-wide through the Postman CLI, which stores skill files in a repository and links it to a Postman workspace, or directly from the Codex plugin marketplace, which also connects an authenticated MCP server. Its API-discovery capability searches internal Postman workspaces and dependency context before suggesting public APIs through Orbit, while its context graph can identify potential downstream effects of API schema changes, though results should be verified because the graph updates nightly. The API-mocking skill can generate local mock backends from collections or OpenAPI specifications, create configurable scenarios such as empty data or server failures, add reusable test collections and environment configuration, and run the resulting test suite. An additional AI-readiness skill assesses whether an API provides enough error-handling information for agents to recover from failures.

Use this post, company, and trend context to find content marketing opportunities, perform competitive analysis, or address product feature gaps via the Plushcap MCP server or the Plushcap API.