Aval

Aval lets an AI agent ask the human it works for a question and wait for the answer, before anything hard to undo: paying, sending an email, deleting, publishing, signing up. The question reaches the human's phone by email and push notification (also Telegram, WhatsApp, Signal or iMessage when enabled), with one button per option. They answer with one tap, optionally with a comment, and the agent gets the answer back. ask_human waits up to 45 seconds; if the human has not answered yet it returns "pending" and the agent calls wait_for_answer until the question is answered, expired or cancelled. An expired question means no approval. Hosted, nothing to install. Paste https://www.taraxe.com/aval/mcp into your MCP client and sign in with your email: the account is created on first connection, with 20 free questions. For the REST API or n8n, use an API key in the Authorization: Bearer header. Then pay as you go: 100 questions for 10 €, 250 for 20 €, 1,000 for 50 €. No subscription.