# X_MCP_RECIPE_UNKNOWN

## Means

an error links to a docs://recipes/ URI no recipe serves

## Typical cause

defineError({ docs }) or an UltimateError names a recipe that recipes: does not declare

## Fix

`recipes: [{ name: '<name>', title, description, steps }] — add it to defineAppMcp, or drop docs: from the error`

[MCP and AI](/error-codes#mcp-and-ai)