Fees and pricing
Pricing by settlement path: standard batch-auction fees and route-specific bridge costs.
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The short version: the standard schedule charges 1 bp plus 80% of reference-quote improvement on volatile pairs (99 bps cap), or 50% on stable pairs (20 bps cap). On Ophis-operated chains, this improvement fee applies only to in-market orders. CoW-hosted chains additionally pay CoW Protocol's upstream fees.
| Path | Optimism / Unichain / Robinhood / Arc | CoW-hosted |
|---|---|---|
| Swap app | 1 bp + 80% improvement (99 bps cap); 50%/20 bps cap for stables | Same 1 bp + capped improvement policy |
| @ophis/sdk integrations | Same sovereign model | Same all-chain policy via CIP-75 appData |
| MCP server (keyless) | Same sovereign model | Same all-chain policy via CIP-75 appData |
| Intent API and MCP calls themselves | Free | Free |
What does Ophis charge?
The standard batch-auction schedule charges a 1 bp Ophis base. On eligible orders, Ophis also retains 80% of reference-quote improvement on volatile pairs, capped at 99 bps of volume, or 50% on stable pairs, capped at 20 bps. On Ophis-operated chains, including Arc, improvement capture applies only to in-market orders. Out-of-market limit orders pay the signed base without this backend improvement fee. CoW-hosted chains additionally pay CoW Protocol fees upstream.
What is the all-in cost on each chain?
For standard-policy batch-auction swaps, the minimum Ophis fee is 1 bp and the maximum Ophis charge is 100 bps on volatile pairs or 21 bps on stable pairs. On CoW-hosted chains, CoW Protocol adds its own fees on top.
Does Ophis take a cut of surplus?
Under the standard policy: 80% on volatile pairs, capped at 99 bps, or 50% on stable pairs, capped at 20 bps. The measurement is improvement over the reference quote, not the user's slippage limit.
What do integrators pay, and what can they charge?
SDK v0.4.3 and hosted MCP integrations charge a 1 bp base on supported chains, including Arc. All supported chains also apply the standard capped improvement policy. On CoW-hosted chains, integrators can charge an onboarded own-fee of up to 90 bps on top. CoW pays it weekly when the weekly amount reaches 0.001 WETH. Ophis's registered hosted configuration reserves a 190 bps aggregate ceiling.
Are the APIs free?
Yes. The public Intent API and the MCP server are free to call. The Intent API is rate-limited to 30 requests per minute per IP; partner-tier rate limits are reviewed case by case.
How do integrations track routed volume?
Referral attribution is live on indexed chains, including Arc. MCP clients pass referrerCode to build_order; direct SDK integrations use v0.4.4 or later for Arc referral tags. The get_integrator_earnings tool reports routed volume, the Ophis base fee, and the integrator's own fee on CoW-hosted chains by appCode.
Arc price-improvement policy
Arc uses the same backend market-order policy: 80% of reference-quote improvement capped at 99 bps, or 50% capped at 20 bps for recognized stablecoin pairs such as USDC/EURC, plus the separate 1 bp base. It applies only to in-market orders; out-of-market limit orders pay the signed base without this backend improvement fee. Eligibility follows the order's price relative to its reference quote, not the frontend's market/limit label. Historical base-only trades retain their original fees. See the Arc fee details.
Bridge costs and gas
These rates are not a total execution-cost estimate. Pool fees, price impact and wallet gas can affect net output. NEAR quotes include a 3 bps Ophis app fee and provider costs; direct Circle bridge and WBTC-conversion routes are separate from batch-auction pricing. Read route restrictions and recovery rules and review the final quote before authorizing a transfer.
Worked example
On $100,000 of Optimism volatile volume with 20 bps of improvement, Ophis receives $10 base plus $160 of improvement capture: $170 total. On a stable pair with the same improvement, the stable capture is 10 bps, producing $110 total; the 20 bps cap does not bind until improvement reaches 40 bps. Hosted chains apply the same Ophis base and improvement policy, with CoW Protocol's separate upstream fees added on top.
Sources and detail
Read why Ophis uses solver-aligned pricing for the rationale behind the base fee and capped improvement capture.
Chain-by-chain fee detail lives at docs.ophis.fi/fees, integrator terms at docs.ophis.fi/partners and business.ophis.fi, referral attribution at docs.ophis.fi/affiliate, and CoW Protocol's own fee schedule at docs.cow.fi. See also supported chains for which chains are Ophis-operated.