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ophis-swap

Use when the user wants to swap, trade, buy, sell, or convert tokens onchain, get a best-execution swap quote, compare a swap against DEX aggregators, or read wallet balances, token prices, gas, or fee-rebate tiers. Drives Ophis, an intent-based DEX (a CoW Protocol deployment) that is MEV-protected, gasless for the trader, and keyless. Supports Ethereum, Optimism, Base, Arbitrum, Polygon, BNB, Gnosis, Unichain, Avalanche, Plasma, Ink, and Linea.

plugins/ophis-fi/skills/skills/ophis-swap/SKILL.md

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Nov 6, 2026
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Apache-2.0

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# Ophis Swap

Ophis is an intent-based DEX, a deployment of CoW Protocol. Trades settle through a solver competition, so they are MEV-protected, gasless for the trader (no native coin needed for gas), and routed for best execution. This plugin already wires up the Ophis MCP server at `mcp.ophis.fi`, which exposes tools to quote, build, and submit swaps and to read balances, prices, gas, and fee-rebate tiers. No API key is required.

Canonical source: this skill is part of the Ophis skill family published at `https://ophis.fi/.well-known/agent-skills/ophis/` (index: `https://ophis.fi/.well-known/agent-skills/index.json`). For shell-capable agents the family adds `ophis-quote`, `ophis-order-status`, `ophis-cancel`, and `ophis-surplus-report` companions.

## Read this first: Ophis is non-custodial

Ophis never holds your private key or your funds. A swap is three steps:

1. `build_order` returns an unsigned, bounded order plus the EIP-712 typed data to sign.
2. You sign that typed data with your own wallet. The MCP cannot sign and never sees your key.
3. `submit_order` relays the signed order to the orderbook.