# X_AI_GATEWAY_MISSING

## Means

an `llm()` action ran with no gateway installed

## Typical cause

no `aiGateway` in `apps/<app>/runtime.ts`

## Fix

`apps/<app>/runtime.ts: export const runtime = { aiGateway: providerGateway({ providers: [provider] }) }` — in a test, `installAiGateway(gateway)` from `@ultimat3/ai/adapter` — any provider: the Anthropic format, the OpenAI format (any compatible server), or your own

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