# Etherscan

```json
{
  "name": "Etherscan",
  "slug": "etherscan",
  "url": "https://composio.dev/toolkits/etherscan",
  "markdown_url": "https://composio.dev/toolkits/etherscan.md",
  "logo_url": "https://logos.composio.dev/api/etherscan",
  "categories": [
    "developer tools & devops"
  ],
  "is_composio_managed": false,
  "updated_at": "2026-11-12T05:32:54.405Z"
}
```

![Etherscan logo](https://logos.composio.dev/api/etherscan)

## Description

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Etherscan MCP or direct API to check balances, trace transactions, inspect token activity, and query blockchain data through natural language.

## Summary

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.

## Categories

- developer tools & devops

## Toolkit Details

- Tools: 54

## Images

- Logo: https://logos.composio.dev/api/etherscan

## Authentication

- **Api Key**
  - Type: `api_key`
  - Description: Api Key authentication for Etherscan.
  - Setup:
    - Configure Api Key credentials for Etherscan.
    - Use the credentials when creating an auth config in Composio.

## Suggested Prompts

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

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `ETHERSCAN_CALL_CONTRACT` | Call Contract | Execute a read-only eth_call at latest state and return raw ABI-encoded data; no transaction is created. |
| `ETHERSCAN_ESTIMATE_CONFIRMATION_TIME` | Estimate Confirmation Time | Estimate confirmation time in seconds for an optional exact gas price in wei. |
| `ETHERSCAN_ESTIMATE_TRANSACTION_GAS` | Estimate Transaction Gas | Estimate gas required for a transaction-like call without submitting a transaction. |
| `ETHERSCAN_GET_ADDRESS_FUNDING_SOURCE` | Get Address Funding Source | Get the first transaction and address that funded an externally owned account. Contract addresses are unsupported. |
| `ETHERSCAN_GET_ADDRESS_METADATA` | Get Address Metadata | Get Etherscan nametags, labels, reputation, notes, and provider-defined metadata for up to 100 addresses. This PRO+ operation is available only on Pro Plus, is mainnet-only, and is limited to two calls per second. |
| `ETHERSCAN_GET_ADDRESS_TRANSACTION_COUNT` | Get Address Transaction Count | Get the number of transactions sent from an address at an optional block tag, as hexadecimal. |
| `ETHERSCAN_GET_API_USAGE` | Get API Usage | Get API credits used, available, and allowed for the connected API key's current interval. This account-level operation has no chain selection. |
| `ETHERSCAN_GET_BLOCK_BY_NUMBER` | 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. Proxy-read chain and plan availability is dynamic and currently unknown; null-result behavior is unprobed. |
| `ETHERSCAN_GET_BLOCK_COUNTDOWN` | Get Block Countdown | Estimate blocks and seconds remaining until a future block is mined. |
| `ETHERSCAN_GET_BLOCK_NUMBER_BY_TIMESTAMP` | Get Block Number by Timestamp | Get the decimal block number closest before or after a Unix timestamp in seconds. This community operation's chain and plan availability is dynamic and currently unknown. |
| `ETHERSCAN_GET_BLOCK_REWARDS` | Get Block Rewards | Get a block's miner reward, uncle inclusion reward, and included uncle records. |
| `ETHERSCAN_GET_BLOCK_TRANSACTION_COUNT` | Get Block Transaction Count | Get a block's total JSON-RPC transaction count as hexadecimal, without transfer-type breakdowns. |
| `ETHERSCAN_GET_BLOCK_TRANSACTION_COUNTS` | Get Block Transaction Counts | Get Ethereum mainnet normal, internal, ERC20, ERC721, and ERC1155 transaction counts for a decimal block number. |
| `ETHERSCAN_GET_CONTRACT_ABI` | Get Contract ABI | Get the JSON-encoded ABI string for a verified contract. Etherscan documents this operation as available on every supported chain and every API plan, including Free. |
| `ETHERSCAN_GET_CONTRACT_BYTECODE` | Get Contract Bytecode | Get bytecode stored at an address for an optional named or hexadecimal block tag. |
| `ETHERSCAN_GET_CONTRACT_CREATION` | Get Contract Creation | Get creator, creation transaction, block, Unix-second timestamp, factory, and creation bytecode for up to five contracts on one chain. This operation's chain and plan availability is dynamic and currently unknown. |
| `ETHERSCAN_GET_CONTRACT_EXECUTION_STATUS` | Get Contract Execution Status | Get whether a transaction's contract execution failed and any provider error description. A failed contract execution is returned as successful read data, not as a tool error. This community operation's chain and plan availability is dynamic and currently unknown; pending and missing-transaction behavior is unprobed. |
| `ETHERSCAN_GET_CONTRACT_SOURCE_CODE` | Get Contract Source Code | Get source code plus compiler, proxy, implementation, license, and verification metadata for one contract. Etherscan documents this operation as available on every supported chain and every API plan, including Free. Unverified contracts may legitimately return empty source code and ABI error text. |
| `ETHERSCAN_GET_CONTRACT_STORAGE` | Get Contract Storage | Get the raw value at a contract storage position for an optional block tag. |
| `ETHERSCAN_GET_CURRENT_GAS_PRICE` | Get Current Gas Price | Get the canonical JSON-RPC current gas price in wei as hexadecimal; use Get Gas Oracle for recommendations. |
| `ETHERSCAN_GET_ERC20_BALANCE` | Get ERC20 Balance | Get one address's ERC20 token balance in exact smallest units, optionally at a historical block. Historical lookup requires Standard+, is mainnet-only and unavailable on testnets; current balance availability is dynamic. |
| `ETHERSCAN_GET_ERC20_TOTAL_SUPPLY` | 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. |
| `ETHERSCAN_GET_ETHER_SUPPLY` | 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. |
| `ETHERSCAN_GET_GAS_ORACLE` | Get Gas Oracle | Get current safe, proposed, and fast gas-price recommendations and the suggested base fee as gwei strings. The documentation displays Ethereum, BNB Smart Chain, Polygon, Celo, Gnosis, and Linea mainnets; plan availability and availability on other chains are unknown. |
| `ETHERSCAN_GET_LATEST_BLOCK_NUMBER` | Get Latest Block Number | Get the latest block number as an exact hexadecimal JSON-RPC quantity. |
| `ETHERSCAN_GET_LATEST_NATIVE_PRICE` | Get Latest Native Price | Get the latest native-token prices in BTC and USD with their Unix-second timestamps. |
| `ETHERSCAN_GET_NATIVE_BALANCE` | Get Native Balance | Get one address's native-token balance in exact wei, optionally at a historical block. Historical lookup requires Standard+, is mainnet-only and unavailable on testnets, and is limited to 2 calls/second; current/recent availability is dynamic. |
| `ETHERSCAN_GET_NATIVE_BALANCES` | Get Native Balances | Get native-token balances for up to 20 addresses in one call, returning wei as exact decimal strings on one chain. This community operation's chain and plan availability is dynamic and currently unknown. |
| `ETHERSCAN_GET_NODE_COUNT` | Get Node Count | Get the current discoverable-node count or daily historical counts over a UTC date range. Historical mode requires Standard+ and Ethereum mainnet chain_id 1. |
| `ETHERSCAN_GET_TOKEN_HOLDER_COUNT` | Get Token Holder Count | Get the number of addresses currently holding an ERC20 token. This PRO Standard+ operation is available on supported mainnets only. |
| `ETHERSCAN_GET_TOKEN_INFO` | Get Token Info | Get token identity, standard, supply, verification, project links, price, and logo metadata for an ERC20, ERC721, or ERC1155 contract. This PRO Standard+ operation is mainnet-only and limited to two calls per second. |
| `ETHERSCAN_GET_TRANSACTION` | Get Transaction | Get one full JSON-RPC transaction by hash or by hexadecimal block number and transaction index. |
| `ETHERSCAN_GET_TRANSACTION_RECEIPT` | Get Transaction Receipt | Get a full JSON-RPC transaction receipt, including event logs, by hash on one chain. Proxy-read chain and plan availability is dynamic and currently unknown. Hexadecimal quantities are preserved as strings; an explicit null result is returned without assigning unverified pending or not-found meaning. |
| `ETHERSCAN_GET_TRANSACTION_RECEIPT_STATUS` | Get Transaction Receipt Status | Get a transaction receipt's success or failure status string. The status may be empty for a pre-Byzantium block. This community operation's chain and plan availability is dynamic and currently unknown; pending and missing-transaction behavior is unprobed. |
| `ETHERSCAN_GET_UNCLE_BLOCK` | Get Uncle Block | Get an uncle block by optional hexadecimal parent block number and uncle index. |
| `ETHERSCAN_GET_VERIFICATION_STATUS` | Get Verification Status | Check source-code or proxy verification status for a GUID returned by a prior verification submission. This read-only action does not submit verification; pending and failed verification text is returned as data. |
| `ETHERSCAN_LIST_BEACON_WITHDRAWALS` | List Beacon Withdrawals | List one page of beacon-chain withdrawals, optionally filtered by recipient and inclusive block range. |
| `ETHERSCAN_LIST_CHAIN_SIZE` | List Chain Size | List daily Ethereum node-chain size measurements for one client and sync mode over a date range. |
| `ETHERSCAN_LIST_DAILY_BLOCK_COUNTS_AND_REWARDS` | List Daily Block Counts and Rewards | List daily mined-block counts and corresponding block rewards in ether over a UTC date range. |
| `ETHERSCAN_LIST_DAILY_GAS_PRICES` | List Daily Gas Prices | List daily minimum, average, and maximum gas prices in wei over a UTC date range. |
| `ETHERSCAN_LIST_DAILY_NETWORK_METRICS` | List Daily Network Metrics | List one normalized daily scalar metric over a UTC date range. The response echoes the metric and unit; Ether historical price is explicitly ETH-specific. All variants require Standard+, are mainnet-only, and are unavailable on testnets; ens_registration_count additionally requires chain_id 1. |
| `ETHERSCAN_LIST_DAILY_UNCLE_COUNTS_AND_REWARDS` | List Daily Uncle Counts and Rewards | List daily uncle-block counts and uncle rewards in ether over a UTC date range. |
| `ETHERSCAN_LIST_ERC721_INVENTORY` | List ERC721 Inventory | List one page of ERC721 token IDs owned by an address for one collection. Requires Standard+, is mainnet-only and unavailable on testnets, and is limited to 2 calls/second. |
| `ETHERSCAN_LIST_EVENT_LOGS` | List Event Logs | List one provider page of event logs over an inclusive block range, filtered by an emitting address, indexed topics, or both. Chain and plan availability is dynamic; hexadecimal quantities are preserved exactly. |
| `ETHERSCAN_LIST_INTERNAL_TRANSACTIONS` | List Internal Transactions | List internal transactions by address, transaction hash, or an unfiltered block range. Address and hash availability depends on the current chain and API plan. Block-range-only mode explicitly requires an Etherscan Standard or higher plan, is available on mainnets only, and is unavailable on testnets. Address and block-range modes return one provider page. Hash mode is not paginated and returns only matching non-zero-value internal transactions. After a query timeout, narrow the block range or reduce offset. |
| `ETHERSCAN_LIST_L2_BRIDGE_TRANSACTIONS` | List L2 Bridge Transactions | List one page of canonical L2 deposits from Ethereum or withdrawals to Ethereum for an address on a supported L2. |
| `ETHERSCAN_LIST_NORMAL_TRANSACTIONS` | List Normal Transactions | List one provider page of an address's normal transactions, optionally filtered by start and end block. Chain and plan availability is dynamic. |
| `ETHERSCAN_LIST_PLASMA_DEPOSITS` | List Plasma Deposits | List one page of Plasma deposit transactions on documented Polygon, Gnosis, or BitTorrent Chain networks, optionally filtered by recipient address. |
| `ETHERSCAN_LIST_SUPPORTED_CHAINS` | List Supported Chains | List current Etherscan mainnet and testnet chains, explorer and API URLs, and service status. This discovery operation has no chain selection and is the time-sensitive authority for supported chain IDs. |
| `ETHERSCAN_LIST_TOKEN_HOLDERS` | List Token Holders | List one page of ERC20 holders or up to 1000 top holders for a token. Top ranking includes contract-versus-EOA address type. Both operations require PRO Standard+, are mainnet-only, and top ranking is limited to two calls per second. |
| `ETHERSCAN_LIST_TOKEN_HOLDINGS` | List Token Holdings | List one page of ERC20 token balances or ERC721 collection quantities held by an address. Requires Standard+ and mainnet access, is unavailable on testnets, and both variants are limited to 2 calls/second. |
| `ETHERSCAN_LIST_TOKEN_TRANSFERS` | 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. Standard-specific amounts, token IDs, token counts, and blockchain quantities remain exact strings. Chain and plan availability is dynamic; after a query timeout, narrow the block range or reduce offset. |
| `ETHERSCAN_LIST_VALIDATED_BLOCKS` | List Validated Blocks | List one page of full blocks or pre-Merge uncle blocks validated by an address. |
| `ETHERSCAN_RESOLVE_ENS_NAME` | Resolve ENS Name | Resolve an ENS name or supported onchain subdomain to an address on Ethereum mainnet. Offchain and wildcard resolution are unsupported; Free-tier calls are limited to one per second and results may be cached for five minutes. |

## Supported Triggers

None listed.

## Installation and MCP Setup

### Path 1: SDK Installation

#### Path 1, Step 1: Install Composio

Install the Composio SDK, the OpenAI provider, and the OpenAI SDK
```python
pip install composio composio_openai openai
```

```typescript
npm install @composio/core @composio/openai openai
```

#### Path 1, Step 2: Create a Composio session

Initialize Composio with the OpenAI Responses provider and create a session scoped to Etherscan
```python
import json
from openai import OpenAI
from composio import Composio
from composio_openai import OpenAIResponsesProvider

composio = Composio(provider=OpenAIResponsesProvider())
client = OpenAI()

session = composio.create(user_id="your-user-id", toolkits=["etherscan"])
tools = session.tools()
```

```typescript
import OpenAI from "openai";
import { Composio } from "@composio/core";
import { OpenAIResponsesProvider } from "@composio/openai";

const composio = new Composio({ provider: new OpenAIResponsesProvider() });
const client = new OpenAI();

const session = await composio.create("your-user-id", { toolkits: ["etherscan"] });
const tools = await session.tools();
```

#### Path 1, Step 3: Run Etherscan tools with your agent

Send a request, execute the Etherscan tool calls through the session, and print the final answer
```python
response = client.responses.create(
    model="gpt-5.6-sol",
    tools=tools,
    input=[{"role": "user", "content": "Get the ETH balance for address 0x742d35Cc6634C0532925a3b844Bc454e4438f44e"}],
)

while True:
    tool_calls = [o for o in response.output if o.type == "function_call"]
    if not tool_calls:
        break
    results = composio.provider.handle_tool_calls(response=response, session=session)
    response = client.responses.create(
        model="gpt-5.6-sol",
        tools=tools,
        previous_response_id=response.id,
        input=[
            {"type": "function_call_output", "call_id": call.call_id, "output": json.dumps(results[i])}
            for i, call in enumerate(tool_calls)
        ],
    )

print(response.output_text)
```

```typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Get the ETH balance for address 0x742d35Cc6634C0532925a3b844Bc454e4438f44e" }],
});

while (response.output.some((o) => o.type === "function_call")) {
  const outputs = await composio.provider.handleToolCalls(session, response.output);
  response = await client.responses.create({
    model: "gpt-5.6-sol",
    tools,
    previous_response_id: response.id,
    input: outputs,
  });
}

console.log(response.output_text);
```

### Path 2: MCP Server Setup

#### Path 2, Step 1: Install Composio

Install the Composio SDK and your agent framework
```python
pip install composio claude-agent-sdk
```

```typescript
npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openai
```

#### Path 2, Step 2: Create a session with MCP enabled

Create a session scoped to Etherscan and read its MCP URL and headers
```python
from composio import Composio

composio = Composio()
session = composio.create(user_id="your-user-id", toolkits=["etherscan"], mcp=True)
```

```typescript
import { Composio } from "@composio/core";

const composio = new Composio();
const { mcp } = await composio.create("your-user-id", {
  toolkits: ["etherscan"],
  mcp: true,
});
```

#### Path 2, Step 3: Connect your agent to the MCP server

Pass the session's MCP URL and headers to your agent and run a Etherscan request
```python
import asyncio
from claude_agent_sdk import ClaudeSDKClient, ClaudeAgentOptions, AssistantMessage, TextBlock

options = ClaudeAgentOptions(
    mcp_servers={
        "composio": {
            "type": "http",
            "url": session.mcp.url,
            "headers": session.mcp.headers,
        }
    },
    system_prompt="You are a helpful assistant with access to Etherscan tools.",
    tools=[],
    allowed_tools=["mcp__composio__*"],
)

async def main():
    async with ClaudeSDKClient(options=options) as client:
        await client.query("Get the ETH balance for address 0x742d35Cc6634C0532925a3b844Bc454e4438f44e")
        async for message in client.receive_response():
            if isinstance(message, AssistantMessage):
                for block in message.content:
                    if isinstance(block, TextBlock):
                        print(block.text)

asyncio.run(main())
```

```typescript
import { createMCPClient } from "@ai-sdk/mcp";
import { openai } from "@ai-sdk/openai";
import { generateText, stepCountIs } from "ai";

const client = await createMCPClient({
  transport: { type: "http", url: mcp.url, headers: mcp.headers },
});

const { text } = await generateText({
  model: openai("gpt-5.6-sol"),
  tools: await client.tools(),
  prompt: "Get the ETH balance for address 0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
  stopWhen: stepCountIs(10),
});

console.log(text);
await client.close();
```

## Why Use Composio?

### 1. AI Native Etherscan Integration

- Supports both Etherscan MCP and direct API based integrations
- Structured, LLM-friendly schemas for reliable tool execution
- Rich coverage for reading, analyzing, and querying your Etherscan data

### 2. Managed Auth

- Connect your Etherscan API key without building custom credential plumbing
- Central place to manage, scope, and revoke Etherscan access
- Per user and per environment credentials instead of hard-coded keys

### 3. Agent Optimized Design

- Tools are tuned using real error and success rates to improve reliability over time
- Comprehensive execution logs so you always know what ran, when, and on whose behalf

### 4. Enterprise Grade Security

- Fine-grained RBAC so you control which agents and users can access Etherscan
- Scoped, least privilege access to Etherscan resources
- Full audit trail of agent actions to support review and compliance

## Use Etherscan with any AI Agent Framework

Choose a framework you want to connect Etherscan with:

- [ChatGPT](https://composio.dev/toolkits/etherscan/framework/chatgpt)
- [Claude Cowork](https://composio.dev/toolkits/etherscan/framework/claude-cowork)
- [Hermes](https://composio.dev/toolkits/etherscan/framework/hermes-agent)
- [Atomic Agent](https://composio.dev/toolkits/etherscan/framework/atomic-agent)

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## Frequently Asked Questions

### Do I need my own developer credentials to use Etherscan with Composio?

Yes, Etherscan requires you to configure your own API key credentials. Once set up, Composio handles secure credential storage and API request handling for you.

### Can I use multiple toolkits together?

Yes! Composio's Tool Router enables agents to use multiple toolkits. [Learn more](https://docs.composio.dev/tool-router/overview).

### Is Composio secure?

Composio is SOC 2 and ISO 27001 compliant with all data encrypted in transit and at rest. [Learn more](https://trust.composio.dev).

### What if the API changes?

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

---
[See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)