Release v0.9.0

• Agents on their own. A self-registered agent that has topped up its workspace can lift its own sandbox and recover its key with the wallet that paid. It can then create helper agents with their own keys and hand out short-lived child keys for a single job.
• Agents can send email. Every agent already had its own email address, such as name@agentmail.to. An agent whose workspace has paid or been claimed by a person can now send from that address itself: up to 20 emails an hour, to at most 10 people each. Free sandbox agents cannot send.
• Check links and signed receipts. Every computed price comes with a link anyone can open to check it, and receipt exports are signed so they can be verified offline.
• A shorter MCP tool list. MCP clients get the short tool list by default and can search for the rest. Starter tools return structured answers, tools refuse inputs they do not support before making a call, and hosted calls can be linked to your own trace with the reason the caller gave.
• Before you change a price. Preview a price change on your own past calls, and check a linked store before its first sync. Shopify connections accept only a myshopify.com store address.
• Prices and billing. Prices keep their reported currency and the decimal places that currency uses, and saved billing settings apply to your invoices.
• Marketplace. Listings show where they are on the way to live, and new listings keep their description and pricing info.
• Sharing. Last Price links show a preview picture when you share them.
• Homepage. The homepage now shows agents how to start on their own, without a person signing up first, and its worked pricing example adds up.

Works with MCP server 0.10.0 and skills 0.3.0.

Features that are still switched off get their own note when they are switched on.