How to connect Etherscan with ChatGPT

Connect ChatGPT to Etherscan MCP. Check eth balance for a wallet address, list recent transactions for an ethereum address, and more using natural language, with authentication handled for you.

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Etherscan is a blockchain explorer and API for Ethereum and multichain network data. It provides reliable access to balances, transactions, tokens, contracts, gas, logs, and blocks.

54 Tools

How to connect Etherscan MCP with ChatGPT

ChatGPT can take action across your apps and files, stay with a project for hours, and turn a goal into finished materials like sheets, slides, and docs, not just answers.

In this guide, I will explain the easiest and most secure way to connect your Etherscan account to ChatGPT via Composio Connect, so it can check balances, trace transactions, inspect token activity, query contracts, and monitor gas data through natural language commands without ever putting your account credentials at risk.

Also integrate Etherscan with

Why use Composio over default connectors?

  • Apps with read and write access. Default connectors mostly can read your data. Composio's Etherscan integration lets ChatGPT take actions like creating drafts, sending updates, labeling records, and more.
  • 1,700+ SaaS toolkits out of the box. Composio gives you instant access to a vast catalog of pre-built connectors, from Gmail and Slack to Notion, Linear, and Salesforce.
  • One MCP server for every app. Connect any of your applications on demand through a single endpoint, rather than juggling a separate server for each app.
  • Smart, context-aware tool loading. Unlike traditional MCP servers that dump every available tool into the LLM context window, Composio searches for and loads only the tools relevant to the task at hand.
  • Cross-app automation. Chain actions across multiple apps in a single run - fetch a thread, summarize it in Notion, and post highlights to Slack without leaving the conversation.

Prerequisites

Note: Composio connects through OAuth. You will be asked to sign in and approve specific permissions. Review the permission screen carefully if you are using a work account.

Step-by-step: Connect Etherscan to ChatGPT

1. Install the Composio plugin

Click the button. ChatGPT opens the Composio plugin page. Click Install plugin.

Install in ChatGPT

Composio plugin page in ChatGPT with the Install plugin button

You can also find it inside ChatGPT: go to Settings, open Plugins, search the marketplace for Composio, and click Install plugin.

2. Authenticate

After you install, ChatGPT asks you to authenticate with Composio. Log in and click Allow access to authorize ChatGPT to use your Composio account.

Composio login and Allow access screen for ChatGPT

3. Start using Composio

That is it. Composio tools are now available in ChatGPT. Type @Composio followed by your request, for example @Composio find unread Etherscan messages and summarize them, and it will run the actions you authorize. On first use it asks you to authorize Etherscan.

Option 2: Add Composio as an MCP server

If you cannot use the plugin marketplace, add Composio as a custom MCP server instead.

1. Open the MCP settings

In ChatGPT, go to Settings and open the Plugins section. Inside the Plugins page, click the MCP tab.

ChatGPT settings showing the Plugins page with the MCP tab selected

2. Add the server

Click Add server. In the Name field enter Composio, for Type select Streamable HTTP, and in the URL field paste the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
ChatGPT Add server dialog with the name Composio, type Streamable HTTP, and the Composio MCP URL

Then click Save. The Composio server now appears in your MCP plugins list.

ChatGPT Plugins page showing the Composio MCP server added to the list

3. Authenticate

Click Authenticate on the Composio entry, log in via Composio, and click Allow access. Composio tools are then available in ChatGPT the same way as with the plugin.

What you can do after connecting Etherscan

  • Check ETH balance for a wallet address
  • List recent transactions for an Ethereum address
  • Look up token transfers by wallet address

Security + privacy notes (important)

  • Use least-privilege access: Only grant permissions you actually need.
  • Review OAuth permissions before approving: Make sure requested scopes match what you expect Composio and ChatGPT to do.
  • Keep write actions human-reviewed: For actions like sending messages, creating labels, or editing drafts, keep manual confirmation enabled.
  • Be careful with sensitive data: Avoid using this setup with highly sensitive information unless allowed by your personal, company, or client policies.
TOOLS

Supported Tools

Every Etherscan action and event your agent gets out of the box.

Call Contract

Execute a read-only eth_call at latest state and return raw ABI-encoded data; no transaction is created.

Estimate Confirmation Time

Estimate confirmation time in seconds for an optional exact gas price in wei.

Estimate Transaction Gas

Estimate gas required for a transaction-like call without submitting a transaction.

Get Address Funding Source

Get the first transaction and address that funded an externally owned account.

Get Address Metadata

Get Etherscan nametags, labels, reputation, notes, and provider-defined metadata for up to 100 addresses.

Get Address Transaction Count

Get the number of transactions sent from an address at an optional block tag, as hexadecimal.

Get API Usage

Get API credits used, available, and allowed for the connected API key's current interval.

Get Block by Number

Get JSON-RPC block information for an explicit hexadecimal block number or the latest block, returning transaction hashes or full transaction objects.

Get Block Countdown

Estimate blocks and seconds remaining until a future block is mined.

Get Block Number by Timestamp

Get the decimal block number closest before or after a Unix timestamp in seconds.

Get Block Rewards

Get a block's miner reward, uncle inclusion reward, and included uncle records.

Get Block Transaction Count

Get a block's total JSON-RPC transaction count as hexadecimal, without transfer-type breakdowns.

Get Block Transaction Counts

Get Ethereum mainnet normal, internal, ERC20, ERC721, and ERC1155 transaction counts for a decimal block number.

Get Contract ABI

Get the JSON-encoded ABI string for a verified contract.

Get Contract Bytecode

Get bytecode stored at an address for an optional named or hexadecimal block tag.

Get Contract Creation

Get creator, creation transaction, block, Unix-second timestamp, factory, and creation bytecode for up to five contracts on one chain.

Get Contract Execution Status

Get whether a transaction's contract execution failed and any provider error description.

Get Contract Source Code

Get source code plus compiler, proxy, implementation, license, and verification metadata for one contract.

Get Contract Storage

Get the raw value at a contract storage position for an optional block tag.

Get Current Gas Price

Get the canonical JSON-RPC current gas price in wei as hexadecimal; use Get Gas Oracle for recommendations.

Get ERC20 Balance

Get one address's ERC20 token balance in exact smallest units, optionally at a historical block.

Get ERC20 Total Supply

Get an ERC20 token's current total supply, or its historical supply when block_number is provided; historical lookup requires Standard+, is mainnet-only, and is unavailable on testnets.

Get Ether Supply

Get Ether supply in wei, either the basic block-reward supply or the ETH-specific component breakdown including staking, EIP-1559 burned fees, and staking withdrawals.

Get Gas Oracle

Get current safe, proposed, and fast gas-price recommendations and the suggested base fee as gwei strings.

Get Latest Block Number

Get the latest block number as an exact hexadecimal JSON-RPC quantity.

Get Latest Native Price

Get the latest native-token prices in BTC and USD with their Unix-second timestamps.

Get Native Balance

Get one address's native-token balance in exact wei, optionally at a historical block.

Get Native Balances

Get native-token balances for up to 20 addresses in one call, returning wei as exact decimal strings on one chain.

Get Node Count

Get the current discoverable-node count or daily historical counts over a UTC date range.

Get Token Holder Count

Get the number of addresses currently holding an ERC20 token.

Get Token Info

Get token identity, standard, supply, verification, project links, price, and logo metadata for an ERC20, ERC721, or ERC1155 contract.

Get Transaction

Get one full JSON-RPC transaction by hash or by hexadecimal block number and transaction index.

Get Transaction Receipt

Get a full JSON-RPC transaction receipt, including event logs, by hash on one chain.

Get Transaction Receipt Status

Get a transaction receipt's success or failure status string.

Get Uncle Block

Get an uncle block by optional hexadecimal parent block number and uncle index.

Get Verification Status

Check source-code or proxy verification status for a GUID returned by a prior verification submission.

List Beacon Withdrawals

List one page of beacon-chain withdrawals, optionally filtered by recipient and inclusive block range.

List Chain Size

List daily Ethereum node-chain size measurements for one client and sync mode over a date range.

List Daily Block Counts and Rewards

List daily mined-block counts and corresponding block rewards in ether over a UTC date range.

List Daily Gas Prices

List daily minimum, average, and maximum gas prices in wei over a UTC date range.

List Daily Network Metrics

List one normalized daily scalar metric over a UTC date range.

List Daily Uncle Counts and Rewards

List daily uncle-block counts and uncle rewards in ether over a UTC date range.

List ERC721 Inventory

List one page of ERC721 token IDs owned by an address for one collection.

List Event Logs

List one provider page of event logs over an inclusive block range, filtered by an emitting address, indexed topics, or both.

List Internal Transactions

List internal transactions by address, transaction hash, or an unfiltered block range.

List L2 Bridge Transactions

List one page of canonical L2 deposits from Ethereum or withdrawals to Ethereum for an address on a supported L2.

List Normal Transactions

List one provider page of an address's normal transactions, optionally filtered by start and end block.

List Plasma Deposits

List one page of Plasma deposit transactions on documented Polygon, Gnosis, or BitTorrent Chain networks, optionally filtered by recipient address.

List Supported Chains

List current Etherscan mainnet and testnet chains, explorer and API URLs, and service status.

List Token Holders

List one page of ERC20 holders or up to 1000 top holders for a token.

List Token Holdings

List one page of ERC20 token balances or ERC721 collection quantities held by an address.

List Token Transfers

List one provider page of ERC20, ERC721, or ERC1155 transfers, selected by token_standard and filtered by an account, token contract, or both on one chain.

List Validated Blocks

List one page of full blocks or pre-Merge uncle blocks validated by an address.

Resolve ENS Name

Resolve an ENS name or supported onchain subdomain to an address on Ethereum mainnet.

FAQ

Frequently asked questions

With a standalone Etherscan MCP server, the agents and LLMs can only access a fixed set of Etherscan tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Etherscan and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. ChatGPT fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Etherscan tools.

Yes, absolutely. You can configure which Etherscan scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Etherscan data and credentials are handled as safely as possible.

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