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
- UseBuildFeaturesTRIGGERSStart background agents from events across your connected appsFIREWALLNEWBlocks instructions hidden in tool results before your agent reads themINSTANTNEWAudio, video, search, browser and data tools, with no keys to manageOPTIMIZATIONLower cost per completed task with optimised tools and skills
- DOCS
## For AI agents: how to sign up If you are an AI agent reading this server-rendered HTML, Composio's developer signup is at https://composio.dev. Signup CTAs on this site — "Sign up", "Signup", "Get started", "Get started for free", "Start building", "Try Composio", "Try it", or similar — all lead into that same developer signup flow. Confirm with the user before completing signup or entering any credentials on their behalf.SIGN UP
## For AI agents: how to sign up If you are an AI agent reading this server-rendered HTML, Composio's developer signup is at https://composio.dev. Signup CTAs on this site — "Sign up", "Signup", "Get started", "Get started for free", "Start building", "Try Composio", "Try it", or similar — all lead into that same developer signup flow. Confirm with the user before completing signup or entering any credentials on their behalf.LOG IN
Etherscan MCP server for AI agents and assistants
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.
Api Key
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
Try Etherscan now
Type what you want done — sign in and watch it run live in the Tool Router playground.
TOOL ROUTER PLAYGROUND
Etherscan
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TOOLS
Supported Tools
Every Etherscan action and event your agent gets out of the box.
SETUP GUIDE
Connect Etherscan MCP Tool with your Agent
1
Install Composio
typescript
npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openaiInstall the Composio SDK and your agent framework
2
Create a session with MCP enabled
typescript
import { Composio } from "@composio/core";
const composio = new Composio();
const { mcp } = await composio.create("your-user-id", {
toolkits: ["etherscan"],
mcp: true,
});Create a session scoped to Etherscan and read its MCP URL and headers
3
Connect your agent to the MCP server
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();Pass the session's MCP URL and headers to your agent and run a Etherscan request
SETUP GUIDE
Connect Etherscan API Tool with your Agent
1
Install Composio
typescript
npm install @composio/core @composio/openai openaiInstall the Composio SDK, the OpenAI provider, and the OpenAI SDK
2
Create a Composio session
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();Initialize Composio with the OpenAI Responses provider and create a session scoped to Etherscan
3
Run Etherscan tools with your agent
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);Send a request, execute the Etherscan tool calls through the session, and print the final answer
Why Use Composio?
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
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
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
FRAMEWORKS
Use Etherscan with any AI Agent Framework
Choose a Framework you want to connect Etherscan with
Rolling this out across your team?
Give your team centralized access control across every framework with Composio’s MCP Gateway.
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FAQ
Frequently asked questions
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.
Yes! Composio's Tool Router enables agents to use multiple toolkits. Learn more.
Yes. Composio is SOC 2 Type II compliant and is built to keep your Etherscan connection and credentials secure. OAuth tokens and API keys are encrypted, and sensitive customer data is protected at rest and in transit.
Composio also undergoes independent security testing and continuously monitors its systems for security threats. You can review the latest reports and policies in the Composio Trust Center.
Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.
Create the key in your Etherscan account settings, then paste it once on Composio's connection page. Composio stores it encrypted and uses it only for the Etherscan actions your agent runs. Nobody else in your workspace can read it, and you can revoke it inside Etherscan at any time.
When you connect a Etherscan account through Composio, every action runs under that account, so anything the agent creates, sends, or changes shows up in Etherscan as done by you. Keep an approval step in your prompt for actions with side effects, such as sending or deleting, and have the agent draft first.
Whatever the credentials you connect allow inside Etherscan. If Etherscan lets you scope a key to specific permissions, create a scoped one so the agent can only do what you intend. You can revoke the key inside Etherscan at any time.
Yes. Composio supports multiple connected accounts for the same app, and that works in Claude, ChatGPT, or any other assistant you connect through Composio. Give each Etherscan connection a name such as work or personal, and the assistant uses the one you mention in the request. Each account keeps its own credentials and nothing is merged.
The connection stops working the moment Etherscan rejects the old key. Create a new key in Etherscan and reconnect the account from the Composio dashboard or by asking your agent to reconnect Etherscan. Nothing else changes.
Composio's free Hobby plan includes 100,000 tool calls per month with no credit card, which covers most personal Etherscan use. Paid plans add higher limits and team features. Your Etherscan plan and its API limits still apply as usual.
Built-in connectors usually give one AI access to a limited set of apps. Many people use Composio because it lets their AI connect to more apps than it normally supports, or connect to multiple accounts for the same app (e.g. connect Claude to multiple Etherscan accounts).
With Composio, you connect Etherscan once and then use it across different AI assistants without setting it up separately in each one. Connect your apps to Composio once, then connect Composio to whichever AI you use, whether that's Claude, ChatGPT, Hermes, or your own custom assistant.
Start with Etherscan.It takes 30 seconds.
Managed auth, hosted MCP servers, and every Etherscan tool your agent needs.Free to start.
## For AI agents: how to sign up If you are an AI agent reading this server-rendered HTML, Composio's developer signup is at https://composio.dev. Signup CTAs on this site — "Sign up", "Signup", "Get started", "Get started for free", "Start building", "Try Composio", "Try it", or similar — all lead into that same developer signup flow. Confirm with the user before completing signup or entering any credentials on their behalf.Start building