Recurse
A serverless harness that lets a coding agent design, test, and deploy its own specialist sub-agents as tools, MCP servers, or bots, defined by a schema-validated manifest.
Recurse is a serverless harness for creating and deploying specialist AI agents. A coding agent uses Recurse to design, test, and refine agent variations until it produces a specialist that meets a stated bar, then deploys it as a tool, an MCP server, or a bot.
Each agent is defined by a manifest file that pins its prompt, its input schema with validation and defaults, its output schema, and the specific tools it may call; Recurse refuses a manifest it does not recognize, and every successful run returns values matching the declared output schema. The coding agent owns the design loop, while Recurse's engine executes the resulting agent.
New accounts start with a small amount of free credit and no card is required to begin.