• LOGIC
  • INTERFACE
  • AUDIT
  • HUMAN

How to debug smart contracts with your AI

Connect FtmScan to your agent to pull real-time contract data. Once connected, your AI can read code and ABIs to find logic errors without you leaving your IDE.

Ask AI about this page

Short answer

How can I debug smart contracts using my AI?

Your agent pulls verified source code and ABIs from FtmScan to analyze contract logic. This lets you spot vulnerabilities and check function signatures without manual searching. You'll see exactly how the code behaves below.

The outcomes of an analysis.

What your agent finds.

The AI uses FtmScan data to produce these specific results.

LOGIC

Vulnerability detection

The agent reads the verified source code to find common patterns that lead to exploits. You get a list of potential risks in the contract logic.

INTERFACE

Function mapping

By pulling the ABI, your AI understands the contract structure. It can suggest the correct parameters for every function call.

AUDIT

Behavioral review

The agent compares intended behavior against the actual code. This highlights discrepancies between what the contract should do and what it does.

HUMAN

Manual verification

The AI flags suspicious code, but you must perform the final audit. It identifies the issues, but you decide if they are real bugs.

The workflow

What your AI does when a contract address is provided.

The agent moves from raw data to actionable insights using two specific tools.

  1. Fetch the ABI

    The agent grabs the Application Binary Interface to understand the contract's structure and function signatures.

    get_contract_abi

  2. Retrieve source code

    It pulls the verified Solidity code directly from the Fantom explorer to see the actual implementation.

    get_contract_source_code

  3. Analyze logic

    The agent cross-references the code with the ABI to map out how functions interact and where state changes occur.

    get_contract_abiget_contract_source_code

  4. Report findings

    The agent presents a summary of the contract's behavior and any identified logic flaws.

    get_contract_source_code

Try it

Copy these to start.

Use these prompts to kick off your debugging session.

Starting points

Swap the contract addresses in these prompts for the ones you are investigating.

FtmScan Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_pTTw1YuQ3CLwsgnovwArQp6hu1wrfnVQtLvNG5Ps/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — FtmScan capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "ftmscan-fantom-network-explorer-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_pTTw1YuQ3CLwsgnovwArQp6hu1wrfnVQtLvNG5Ps/mcp"
    }
  }
}
Copy into chat04

  • Get the source code and ABI for contract 0x123... and tell me if there are any reentrancy risks.

  • Pull the ABI for 0xabc... and explain how the transfer function works.

  • Read the source code for 0x789... and check if the owner permissions are set up correctly.

  • Analyze the contract at 0xdef... using its ABI to find any unused functions.

  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Start here

Connect FtmScan once, then ask.

Click the link to connect the MCP to your client. Your credentials stay encrypted and you can start debugging immediately.

Connect FtmScan to your AI

FAQ

How this task behaves

  • 01

    Can the AI fix the smart contract bugs for me?

    No. The AI can identify and explain bugs in the code, but it cannot modify the deployed contract on the Fantom network.

  • 02

    Does the AI need the contract to be verified on FtmScan?

    Yes. The agent relies on the get_contract_source_code tool, which requires the source code to be verified on the explorer to read it.

  • 03

    Can the AI execute transactions on the Fantom network?

    No. This MCP is for reading data like source code and ABIs. It does not have the capability to sign or send transactions.

  • 04

    Can it analyze unverified contracts?

    No. If the source code isn't verified on FtmScan, the agent cannot pull the code to perform a logic analysis.

  • 05

    How does the AI know which functions exist?

    It uses the get_contract_abi tool to retrieve the interface, which tells the agent exactly what functions are available.

  • More questions about FtmScan? See everything the FtmScan Connector can do

Connect FtmScan to Claude, Cursor, ChatGPT & more