What causes "Action not found: ${path}" in withastro/astro?

Run astro check to detect mismatched/renamed action names at compile time.

withastro/astro · error · Error

Action not found: ${path}

Error message

Action not found: ${path}

What it means

pipeline.getAction(path) resolved to nothing for the requested action path: no registered action matches that name. The server entrypoint received a request for an action it does not know about.

Source

Thrown at packages/astro/src/actions/runtime/entrypoints/server.ts:34

	ActionReturnType,
	SafeResult,
} from '../types.js';

export const getActionPath = createGetActionPath({
	baseUrl: import.meta.env.BASE_URL,
	shouldAppendTrailingSlash,
});

export const actions = createActionsProxy({
	handleAction: async (param, path, context) => {
		const pipeline: Pipeline | undefined = context
			? Reflect.get(context, pipelineSymbol)
			: undefined;
		if (!pipeline) {
			throw new AstroError(ActionCalledFromServerError);
		}
		const action = await pipeline.getAction(path);
		if (!action) throw new Error(`Action not found: ${path}`);
		return action.bind(context)(param);
	},
});

View on GitHub (pinned to d081033d5f)

Solutions

Run astro check to detect mismatched/renamed action names at compile time.
Confirm the action is exported from src/actions/index.ts and the calling code references the same name.
Rebuild and redeploy both client and server so names stay in sync.
Fix any typos in the calling code.

Example fix

// before - src/actions/index.ts
export const getUser = defineAction({ handler: async () => {/*...*/} });
// caller (stale)
const u = await actions.fetchUser(id);
// after
const u = await actions.getUser(id);

Defensive patterns

Strategy: try-catch

Validate before calling

// Before calling, ensure the action name exists on the actions object (typed).
function assertAction(actions: Record<string, unknown>, name: string) {
  if (typeof actions[name] !== 'function') {
    throw new Error(`Unknown action "${name}". Run \`astro check\` to verify action names.`);
  }
}

Type guard

function isKnownAction(actions: Record<string, unknown>, name: string): name is string {
  return typeof actions[name] === 'function';
}

Try / catch

try {
  await Astro.callAction(actions.myAction, input);
} catch (e) {
  if (e instanceof Error && /Action not found/.test(e.message)) {
    // surface a friendly 404 or rebuild/redeploy
  } else throw e;
}

Prevention

Run astro check in CI to catch renamed/missing action names.
Deploy client and server from the same build so names match.
Avoid dynamic action-name strings; reference actions.xxx statically.

When it happens

Trigger: Calling an action that was renamed or deleted; a typo in the action name; a stale client bundle referencing an old action name; or an HTTP request to the action RPC endpoint with an unknown action path.

Common situations: Renamed an action but the deployed client still references the old name; client and server deployed from mismatched builds; typo in the destructure (actions.myaction vs actions.myAction).

Related errors

AI-assisted analysis of withastro/astro@d081033d5f (2026-08-12). Data as JSON: /api/errors/8ce93139a7afa996. Report an issue: GitHub.