@agentpaystack

The canonical map of AI agent payment rails. Protocols, wallets, settlement, governance. Updated as the space moves.

agentpaymentsstack.com/
Joined March 2026
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Spotlight: @framesag Programmable wallet infra for AI agents. Spend policies, gas sponsorship, tool authorization — without giving the agent raw key access. 400K+ events. x402 + MPP. Colosseum-backed. Live. agentpaymentsstack.com/frame… 🧵

Frames — Agent Payments Stack

Programmable wallet infrastructure for AI agents. Operators create and fund agent wallets, enforce spend and action policies, sponsor gas, and authorize tool usage. Supports x402 and MPP.

agentpaymentsstack.com
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400K+ events processed across agent activity on multiple chains. Backed by Colosseum. This isn't a whitepaper. It's live infrastructure with usage behind it.
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On the Agent Payments Stack, Frames sits at L1 (Wallet & Key Management) — the layer that decides who signs and under what constraints. agentpaymentsstack.com/frame…

Frames — Agent Payments Stack

Programmable wallet infrastructure for AI agents. Operators create and fund agent wallets, enforce spend and action policies, sponsor gas, and authorize tool usage. Supports x402 and MPP.

agentpaymentsstack.com
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Agent Payments Stack retweeted
GATE@mppgateMar 31
Shoutout to @JordanLyall — CPO @artblocks_io, and the person quietly mapping the entire agent payments ecosystem through @agentpaystack. 162 projects. 6 layers. one of the most useful references in this space right now. glad we made it onto the map!
GATE@mppgateMar 30
We're in. 🎉 MPPGate is now listed on the Agent Payments Stack — a directory mapping every project building infrastructure for AI agent payments. 162 projects. 6 layers. we're at L4: Governance & Policy. that's the layer that decides how agents spend. budgets, limits, auto-stop. that's us.
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Agent Payments Stack retweeted
Ken Wattana
@KenWattanaApr 1
"Governance and Policy" @contofinance now added to the L4 layer of the @agentpaystack
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Agent Payment Spotlight: @tempo @stripe co-authored the spec. @AnthropicAI and @OpenAI are day-1 services. $500M raised at $5B. Mainnet launched 11 days ago. L3 on the Agent Payments Stack agentpaymentsstack.com/tempo… 🧵👇
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The honest take: institutional pedigree is real, production track record is not yet. 11 days old, code unaudited, txn volumes unconfirmed. Building today: x402 for crypto-native stacks. MPP if you need fiat rails or LLM micropayments.
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x402 won the first lap. MPP is betting the race gets longer. It's Layer 3 on our Agent Payments Stack: agentpaymentsstack.com/tempo…

Tempo MPP — Agent Payments Stack

Machine Payments Protocol — open standard for agent-to-API payments, co-authored by Stripe. HTTP 402-based challenge-response with sessions (streaming micropayments via signed off-chain vouchers)....

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Agents are starting to spend money. The infrastructure for that is being built right now, across 162 projects, 6 layers, $8B in M&A activity in the last 18 months. We're tracking all of it. agentpaymentsstack.com

The Agent Payments Stack — 100+ Projects, 6 Layers

Every major payment network is building rails for AI agents. 191 projects mapped. 98.6% settles in USDC. $43M volume, ~$600M annualized.

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