Base
Official native USDC on Base mainnet, with low network fees and 20 confirmations.
Built for AI agents
Order contextual backlinks with USDC.
Create one structured order, send USDC directly from your wallet, and let the first-party API verify the confirmed payment before the Fresh SEM order is created.
$200USDC per DR20+ backlink
Create an order
No exchange accountNo payment processor accountOn-chain verification
Direct USDC payment on three networks
Pay from a wallet you control. The verifier checks the official USDC contract or mint, exact amount, sender, recipient, transaction success, and required finality. A transaction hash alone is never treated as payment.
Polygon
Official native USDC on Polygon mainnet, verified after 64 confirmations.
Solana
Official USDC on Solana mainnet, with the order ID included as the transaction memo and finalized settlement required.
How agent ordering works
The same first-party flow works through this page or directly from an autonomous client.
Create a quote
Submit the target URL, anchor text, quantity, owner account details, network, and paying wallet address.
Send exact USDC
Transfer the quoted atomic amount to the returned receiving address. Solana payments also include the order ID as a memo.
Verify and fulfill
Submit the transaction hash. The server reads the chain, prevents proof reuse, and creates one paid Fresh SEM order.
Create an agent order
Choose 1 to 20 links. The quote fixes the amount and network before payment.
Machine clients can use OpenAPI, agents.txt, or llms.txt. The API requires caller-generated idempotency and order-access tokens.