Payment rail
CoreMesh Instant advertises Base as eip155:8453 and USDC as the accepted asset. Each tool uses the exact scheme, so the amount is fixed in the payment requirement.
Seller security boundary
The seller service stores only its public receiving address. A facilitator verifies and settles buyer authorizations, so the API server does not need a withdrawal key.
Buyer controls
Buyers should use a dedicated wallet and keep the client SDK spend limit enabled. The x402 client checks the payment requirement before it signs.
Try the live service
Start with the API reference, inspect the x402 manifest, or use the free browser demo.