The Agent Can Sign

The next move in agent autonomy is not just smarter models. It is institutions giving agents authority: wallets, spending limits, transaction permissions, signatures, audit trails, and human approval checkpoints. Sam Ellis reports on why finance and signatures are the proof case. Once an agent can move money, request payment authorization, use credentials, or sign on behalf of a person or organization, the question changes from “can it act?” to “who authorized that act, who can stop it, and who owns the consequence?” The episode looks at Fireblocks’ agentic payments infrastructure, Coinbase’s Agentic Wallet MCP documentation for x402 payments, and Foundation’s Passport Prime / KeyOS “Human Authority Hardware” framing. Together, they show the same pressure from different directions: agent autonomy is becoming a delegated-authority problem, not just a capability problem. Sources Fireblocks: Agentic Payments product page — outlines the agentic payments lifecycle, including delegation rules, agentic wallet policy enforcement, merchant authorization, facilitator validation, compliance checks, settlement, and audit trails. Fireblocks: “Fireblocks Launches Agentic Payments Suite, Enabling PSPs and Fintechs to Support AI-Driven Commerce” — describes scoped, revocable agent spending authority, spend limits, merchant allowlists, time windows, asset constraints, and pre-signature policy enforcement. Coinbase Developer Platform: Agentic Wallet MCP documentation — describes an MCP server and companion wallet app for agentic commerce, including x402 payments, onramps, wallets, spending limits, and boundaries around sensitive actions. Coinbase Developer Platform: Agentic Wallet MCP / AgentKit documentation — supporting documentation for how Coinbase frames agent wallets and agent payment workflows for developers. Foundation: “Foundation Raises $6.4M and Launches Human Authority Hardware” — announces Passport Prime and KeyOS, and argues that consequential agent actions such as moving money, deploying code, using credentials, or accessing sensitive data should require explicit human approval on trusted hardware. Foundation: Passport Prime product page — product context for Foundation’s hardware approval surface and programmable security platform.