Is Cofferline an exchange or a wallet? Neither. It is the policy and orchestration layer on top of the agent's own smart account, driving existing execution venues (CoW Protocol, ParaSwap; more behind the same interface).
Do you ever hold funds or keys? No. No code path stores or receives a user private key; on-chain authority will come from scoped, revocable session-key delegations enforced by the agent's own ERC-4337 account.
What does it cost? Discovery, quotes, pre-flight checks, and reads are free. Metered execution is priced in the manifest (the same source renders this site's pricing) and is payable in USDC via x402 — no cards, no invoices.
Which chains? Base (8453) in production, Base Sepolia (84532) in the dev environment. Quotes run against Base mainnet markets, where the venues actually operate.
How do I trust your numbers? Quotes call live venue APIs on every request. Benchmarks (when they ship) publish only measured aggregates from real completed intents with sample sizes attached — an empty bucket reports n: 0, never an invented number.