Until now, paying for an endpoint meant holding USDC on Base. That shut out agents whose wallets live on Solana.

Each endpoint's payment challenge — the 402 response an agent gets before it pays — now lists two ways to settle:

  • USDC on Base
  • SPL-USDC on Solana mainnet

The price is the same on both. An agent reads the challenge, picks the rail it already funds, and pays. Nothing changes for callers already on Base: that option stays first in the list and settles exactly as it did before.

Both chains settle through the same Coinbase CDP facilitator we already use, which handles EVM and Solana. The Solana fee-payer is resolved from the facilitator when the worker starts, so Solana is only advertised when CDP can actually settle it. If that support ever drops, endpoints fall back to Base-only rather than offering a payment that can't complete.

Discovery works the way it always has: GET any endpoint to see its schema and both payment options.