The Directory
The companies building the machine economy. Yours missing? Listing is free.
Live x402 Sellers
Sellers with endpoints answering 402 Payment Required in today's census — sorted by live inventory.
| Seller | Endpoints | Median price | Networks | What they sell |
|---|
The Protocols
The rails everything above runs on.
x402
HTTP-native payments. A request hits a paywall, the agent pays in stablecoins, the response comes back. Revived HTTP 402, led by Coinbase.
AP2
Google's Agent Payments Protocol — verifiable mandates so an agent can prove it was authorized to spend. 60+ launch partners.
ACP
Agentic Commerce Protocol by OpenAI & Stripe — checkout inside ChatGPT and any agent surface.
MCP
Model Context Protocol — how agents discover and call tools. The front door that x402 monetizes.
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