Rubic MCP Server gives Claude, Cursor, VS Code, and other MCP-compatible AI tools structured access
to cross-chain and on-chain token swaps — quote, simulate, build, sign, broadcast, and track transactions.
Swap Tokens Across 70+ Chains
via AI Agents
With Quoting and Swap Simulation
Non-custodial. Open-source.
- 13 TOOLS
- 70+CHAINS*
- NON-CUSTODIAL LOCAL SIGNING
- MIT LICENSE
* Chain count reflects supported routing paths. EVM chains support full execution, while non-EVM chains support quoting and browser fallback.
npx -y @cryptorubic/mcp
Add to Claude, Cursor, VS Code,
or any MCP client
Compatible with
Supported AI Tools
and MCP Clients
Rubic’s MCP Server connects to popular MCP-compatible AI tools and developer environments, including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Cline, Continue, and Zed.
Claude
Cursor
VS Code
Windsurf
Cline
Continue
Zed
Docker
Any MCP-compatible client that speaks stdio or streamable HTTP can connect.
Why AI Agents Use
Rubic’s MCP Server
Rubic MCP Server replaces browser actions with structured DeFi tools. Agents quote, simulate, build, and surface risks, while users approve and sign.
Structured MCP tools
for DeFi workflows
Typed inputs and outputs agents can reliably
plan against.
Typed error handling
Semantic codes enable clean agent recovery
and decision branching.
Modular swap execution
flow
Quote, build, sign, broadcast, and track as
separate tools for flexible agent control.
Read-only mode
Discover routes, quotes, and calldata without
a private key.
Pre-approval swap
simulation
Preview output, fees, and risk before
execution.
Local signing with
fallback
Keys stay local; non-EVM or manual flows fall
back to Rubic in-browser.
How Rubic MCP Server Works
From config to broadcast in three predictable steps. The agent shows a preview before anything is signed.
Connect
Add a JSON config block to Claude, Cursor, VS Code, Windsurf, Cline, Continue, Zed, or any MCP client.
Simulate
The agent previews the swap, including expected output, fees, gas estimate, route, duration, and risk level. No signing yet.
Execute
Approve the preview and the agent executes locally, or open the route in Rubic as a browser fallback.
Why Simulation-First Swaps Matter
Most DeFi MCP servers go straight from prompt to transaction.
Rubic’s MCP Server lets AI agents show their work first, with a preview before signing when the workflow requires it.
Without simulation
- Agent executes the swap immediately
- No fee breakdown before signing
- No risk assessment
- Generic error on failure
- “Agentic finance” marketing copy
Simulate-firstRubic’s MCP
- Agent simulates first, then shows a preview
- Total cost in USD: gas, protocol, and provider fees
- Risk level: low / medium / high
- Typed error codes for recovery
- Structured JSON data agents can verify
DeFi Use Cases for AI Agents
Real prompts, real flows. You describe the outcome, and the agent selects the tools.
Cross-Chain Token Swaps
C:\\
“Swap 500 USDC from Ethereum to Arbitrum”
Ask an AI agent to swap tokens between supported chains, compare routes, simulate the outcome, and proceed only after approval.
[rubic_simulate_swap]
On-Chain Token Swaps
C:\\
“Swap ETH to USDC on Arbitrum”
Use Rubic’s MCP Server for same-chain token swaps where supported, with quoting, simulation, and transaction preparation via MCP tools.
[rubic_simulate_swap]
Route Comparison with
C:\\
“Show me all routes for 1 ETH to MATIC”
Compare swap routes by output, fees, providers, timing, and risk.
[rubic_get_routes]
Swap Simulation with
C:\\
“Simulate swapping 1 AVAX to ETH”
Preview output, fees, gas, route details, and risk before signing.
[rubic_simulate_swap]
Supported Networks
for Cross-Chain
and On-Chain Swaps
Rubic’s MCP Server supports cross-chain and on-chain swap workflows across a broad set of EVM and non-EVM ecosystems through Rubic’s routing infrastructure.
EVMFull execution and local signing
Ethereum
BNB Chain
Base
zkSync Era
Arbitrum
Polygon
Optimism
Scroll
Linea
Mantle
Blast
Avalanche
Non-EVMQuoting, calldata & browser fallback
Solana
TRON
TON
Bitcoin
EVM networks support local signing and full execution; non-EVM networks use rubic_get_swap_url for browser-based confirmation.
Rubic MCP Server FAQ
Why is Rubic MCP Server?
Which AI tools does it support?
Is it custodial?
How are private keys handled?
Which chains are supported?
Can AI agents execute swaps automatically?
How does swap simulation work?
Where can I get started?
