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y0-defi-assistant

Build unsigned multi-chain DeFi swap and send transactions with gas estimates.

7|1|Updated Mar 9, 2026
Search Tags:#mcp#portfolio#defi#crypto#swap#gas-optimization#non-custodial
One-click install
npx skills add https://github.com/y0exchange/mcp --skill y0-defi-assistant
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: y0-defi-assistant
Source: https://github.com/y0exchange/mcp/tree/main/skill
Command: npx skills add https://github.com/y0exchange/mcp --skill y0-defi-assistant

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Managing multi-chain crypto portfolios and executing token swaps or transfers is complex, error-prone, and costly when gas and liquidity are not considered. This Skill centralizes balance checks, price research, gas estimation, swap quotes, transaction history, and unsigned transaction construction so users can make informed, non-custodial decisions without exposing private keys.

Core Features & Use Cases

  • Portfolio visibility: Aggregate balances and USD valuations across supported chains with per-token and per-chain breakdowns and concentration risk alerts.
  • Swap and transfer tooling: Preview swap quotes, estimate gas, and build unsigned swap or send transactions that the user signs on-device; includes slippage and gas guardrails for safety.
  • Gas and routing guidance: Compare gas costs across chains, recommend cheaper execution strategies, and flag when gas exceeds defined thresholds.
  • Use Case: A user asks "rebalance my portfolio to 50% ETH, 50% USDC"; the Skill retrieves the portfolio, computes required swaps, fetches quotes and gas estimates, and presents a confirmed per-swap plan before building unsigned txs.

Quick Start

Use the y0-defi-assistant to check my portfolio and prepare a swap quote for 100 USDC to ETH on Ethereum.

Frequently Asked Questions about y0-defi-assistant

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I check my multi-chain DeFi portfolio balances and USD valuations without exposing private keys?▼

Check multi-chain DeFi portfolio balances using non-custodial tools that aggregate on-chain data and provide USD valuations without requiring private keys. The Skill retrieves per-token and per-chain breakdowns across Ethereum, Arbitrum, Base, BNB Chain, and Polygon.

Can I preview swap quotes and estimate gas costs across Ethereum, Arbitrum, Base, BNB Chain, and Polygon?▼

Yes, you can preview multi-chain swap quotes and estimate gas costs across Ethereum, Arbitrum, Base, BNB Chain, and Polygon. The Skill compares gas costs across chains, recommends cheaper execution strategies, and flags when gas exceeds defined thresholds.

What's the best way to build unsigned token swap and transfer transactions for non-custodial wallets?▼

The best way to build unsigned token swap and transfer transactions is using a non-custodial assistant that constructs transactions with slippage and gas guardrails. The Skill builds unsigned transactions that await user confirmation and on-device signature.

Do I need an MCP server endpoint to execute non-custodial crypto swaps and transfers?▼

Yes, you need an MCP server endpoint to execute non-custodial crypto swaps and transfers. The Skill requires this endpoint for balance checks and quote previews, and optionally needs a Y0_API_KEY to build unsigned transactions for write actions.

How do I rebalance my crypto portfolio by computing required swaps and fetching gas estimates?▼

Rebalance your crypto portfolio by instructing the assistant to retrieve balances, compute required swaps to reach target allocations, and fetch quotes with gas estimates. The Skill presents a confirmed per-swap plan before building unsigned transactions.

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