No signup. No login. No card. One press and you get a workspace_key you can use immediately. Free tier is 3 agents per workspace — every rail, budget caps with real enforcement, alerts, reports, token burn, and the MCP server are included.
Running this from an agent? An agent with a wallet can mint its own workspace with no human in the loop at all:
curl -X POST https://agent-ledger-production-0ff8.up.railway.app/v1/billing/x402 -H "X-PAYMENT: <your x402 payment header>"
The paying wallet becomes the workspace identity. Agent-facing docs: /llms.txt