Open Agentic Commerce
Open agentic commerce is agentic commerce built on open, permissionless protocols rather than a single company's closed platform. Any agent can discover and pay any service, and any developer can offer one, with no gatekeeper. Merit Systems uses the term for the open alternative to walled-garden checkouts like in-chat purchases.
Updated June 24, 2026
The open agentic commerce ecosystem
| Protocol | Transactions | Volume | Participants |
|---|---|---|---|
| x402 | 181.8M | $51.7M | 998.1K |
| MPP | 1.2M | $146.5K | 100.2K |
Live on-chain totals from x402scan and mppscan, updated hourly.
How is open agentic commerce different from closed agentic commerce?
Both run on agentic commerce, but a closed system lets only approved partners take part and routes everything through one company's rails. Open agentic commerce runs on shared, permissionless protocols, so any agent can pay any service and any developer can offer one.
| Dimension | Closed (walled garden) | Open |
|---|---|---|
| Who can participate | Approved partners | Anyone |
| Rails | One company's proprietary system | Open protocols (x402, MPP) |
| Discovery | A curated catalog | Open indexes (x402scan, MPPScan) |
| Control | A single platform | No gatekeeper |
Why does "open" matter?
Closed platforms decide who can sell and take a cut. Open protocols let any developer offer a service and any agent pay for it, which opens the long tail of APIs and data a curated catalog would never list. It is the difference between renting space in one company's mall and transacting on the open internet.
What is the open agentic commerce stack?
It has three layers: payment protocols like x402 and MPP; discovery and indexes like x402scan and MPPScan; and agent payment tools like AgentCash that let an agent hold funds and pay.
Who is building open agentic commerce?
Merit Systems champions the term and builds infrastructure for it, including x402scan and MPPScan for discovery and AgentCash for agent payments. Our essay The Age of Open Agentic Commerce lays out the thesis.
Frequently Asked Questions
- What is open agentic commerce?
- It is agentic commerce built on open, permissionless protocols instead of one company's closed platform, so any agent can pay any service and any developer can offer one, with no gatekeeper.
- How is it different from checkout in ChatGPT?
- In-chat checkout is a closed experience controlled by one platform and its partners. Open agentic commerce runs on open protocols, so participation is permissionless on both the buying and selling sides.
- What protocols power open agentic commerce?
- Agent-native payment protocols such as x402 and MPP, usually settling in stablecoins, plus open indexes like x402scan and MPPScan that let agents discover what they can pay for.
- Who coined open agentic commerce?
- Merit Systems uses and champions the term for the open alternative to closed agentic checkout. Its essay The Age of Open Agentic Commerce sets out the vision.