Ophis

- Gasless, MEV-protected.Orders settle in a batch auction where every trade clears at one uniform price, so sandwiches and front-running are structurally absent, not best-effort.
- Solver-aligned pricing.On every supported chain the base fee is 1 bp and Ophis earns primarily when execution beats its reference quote: 80% of improvement on volatile pairs (99 bps cap), or 50% on stable pairs (20 bps cap). Hosted chains encode that policy in CIP-75 appData and separately pay CoW Protocol's upstream fees.
- Non-custodial, no account, no auth.Every order is signed in your own wallet (EIP-712 or ERC-1271). Ophis never holds keys or funds and cannot move, freeze, or recover them. The signature is the only trust boundary.
- Transparent, capped fees.A 0.01% (1 bp) base plus the capped improvement policy above, with a share returned monthly as WETH rebates plus an 8% referral on trades you bring.

Live across 13 EVM chains, with Ophis-operated settlement on Optimism (chain 10), Unichain (130), and Robinhood Chain (4663), plus CoW-hosted settlement on the other supported chains.

Ophis's one bespoke API turns natural language into a structured order. No key, no account, just POST your request:

curl -sS https://ophis.fi/api/intent \ -H 'content-type: application/json' \ -d '{"text":"swap 100 USDC for ETH on Base"}'

Ophis is built to be traded by autonomous agents, not just people. Pick your integration depth, all of it non-custodial and keyless:

Point any MCP client (Claude, Cursor, a custom agent) at the hosted Model Context Protocol server:

For agents that build and sign CoW orders directly:

The SDK encodes four fork details that failsilentlyif you guess them:

- getOphisOrderbookUrl(chainId)picks the right host. Optimism self-hosts its orderbook (notapi.cow.fi); the wrong host bypasses the Ophis solver and zeroes the fee.
- getOphisOrderDomain(chainId)gives the EIP-712 domain with the correctverifyingContract. The OP settlement is non-canonical, so the cow-sdk default is rejected on-chain.
- buildOphisAppDataPartnerFee(chainId)builds the exact CIP-75 volume-fee fragment{ volumeBps, recipient }, not the price-improvement shape.
- assertReceiverIsOwner(owner, receiver)pins the order receiver. An unpinned receiver is the number one drain vector for an automated signer.

Ophis publishes machine-readable manifests for agent discovery underhttps://ophis.fi/.well-known/:mcp.json,ai-plugin.json,agent-skills/, andapi-catalog(RFC 9727), plus the root-servedauth.md,llms.txt, andopenapi.json.

Ophis settles across two kinds of chains.

Ophis-operated(self-hosted orderbook, solver, and settlement; Ophis keeps the full fee):

CoW-hosted(orders route through CoW Protocol's settlement and solver network, with the partner fee disbursed by CoW): Ethereum, Base, Arbitrum, Polygon, BNB, Gnosis, Avalanche, Linea, and the other CoW-supported chains, all live.