Pyspur

PySpur is an AI agent builder and playground for engineers who need their agents to be reliable. It combines a drag and drop workflow editor with the option to define agents in Python code, and it adds testing so that failures can be found and fixed quickly rather than by reading raw terminal output. The workflow it promotes has four steps: define test cases for the agent to run, build the agentic workflow, run the tests and iterate on failures, then deploy to the cloud or on premises. New tools are added by writing a single Python file, and every agent can be exported as a JSON file to share with a team or commit to version control. Python and TypeScript SDKs are listed as coming soon. Installation is a pip package, started with the pyspur init and pyspur serve commands, and a SQLite option is shown for local runs. The company was founded in 2024, is backed by Y Combinator and is led by co founders with machine learning research and engineering backgrounds. The code is open source under the Apache 2.0 license, and a hosted cloud version is also offered. The site does not publish prices for the cloud product, and no plan tiers are shown. The open source version is free to install.