PreMan replaces Postman and redefines the entire API testing life cycle. You git push. PreMan detects API changes, Tests every affected endpoint, Finds impacted customers, Generates fixes, Monitors in production and autofixes any endpoint issues.

Hey Product Hunt, I’m Alspencer, building PreMan. The idea came from a problem we kept hitting while building with MCP and agent tools: traditional API testing does not fully answer whether an LLM can discover a tool, understand its schema, call it with the right arguments, handle auth, and produce a useful result. PreMan is a Postman-style workspace for MCP servers and AI agent APIs. Today it lets you: - turn REST APIs into hosted MCP servers - test MCP tools and regular API endpoints - issue scoped tokens for agents - inspect audit logs for tool calls - create API descriptions that are easier for LLMs to use We’re looking for teams building MCP servers, internal agents, or production tool-calling APIs. If this is something you’re wrestling with, I’d love blunt feedback and pilot users.