X (Twitter)LinkedInGitHubDiscordYouTube

How to connect Alchemy to Claude

Connect Claude Web, Desktop and Cowork to Alchemy MCP. Show all nfts owned by this wallet, get recent sales for a specific nft collection, and more using natural language, with authentication handled for you.

Get started for freeGet a demo
Alchemy logoAlchemy
Api Key

Alchemy is a blockchain development platform offering APIs and tools for Ethereum apps. It simplifies building and scaling Web3 projects with robust infrastructure.

36 Tools

Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your Alchemy account to Claude via Composio Connect, enabling it to show all NFTs owned by this wallet, get recent sales for a specific NFT collection, check ERC20 token balances for your address, and more such actions on your behalf without compromising your account security.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

Also integrate Alchemy with

Claude CodeOpenAI Agents SDKClaude Agent SDKCodexOpenClawHermesAtomic AgentGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAIPydantic AIAutoGen

Connecting Alchemy to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

2. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Web, Desktop, and Cowork

3. Connect your Alchemy account

Back in Claude, ask it to connect to Alchemy or give it any Alchemy-related task.

For example, ask Claude to:

  • "Show all NFTs owned by this wallet"
  • "Get recent sales for a specific NFT collection"
  • "Check ERC20 token balances for your address"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your Alchemy account is ready to use.

What is the Alchemy Claude Connector, and what's possible with it?

The Alchemy MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Alchemy account. It provides structured and secure access to your blockchain data, so your agent can perform actions like fetching NFT metadata, tracking token balances, analyzing transaction history, and managing Ethereum assets on your behalf.

  • Retrieve NFT contract and token metadata: Instantly access detailed information about any NFT collection or token, including name, symbol, supply, and contract deployer.
  • Analyze NFT sales and ownership: Let your agent fetch historical NFT sales across marketplaces and list current owners for any ERC-721 or ERC-1155 token.
  • Track token balances and portfolio: Effortlessly check ERC-20 token balances for any Ethereum address to monitor holdings or build portfolio analytics.
  • List NFTs within a collection: Pull a complete list of NFTs under a specific contract to explore, display, or analyze full collections.
  • Monitor transaction counts and activity: Quickly get the transaction count (nonce) for any Ethereum address to understand activity or prepare for new transactions.

Troubleshooting

1. Why does Claude not use the Composio connector for Alchemy?

The connector can show as connected, but Claude must use it in each Alchemy conversation.

  • Click + at the lower left of the chat, or type /.
  • Hover Connectors.
  • Turn on Composio.
  • Ask Claude to connect to Alchemy again.

2. Why does Claude show an MCP server error before Alchemy connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Alchemy.

  • Check that the connector URL is https://connect.composio.dev/mcp.
  • Connectors run from Anthropic's cloud, so your device network is usually not the problem.
  • Add the connector again from Customize > Connectors, then ask Claude to connect Alchemy.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Alchemy authorization link not work?

The Composio connector is one server. Your Alchemy account connects separately when Claude asks for it.

  • If the browser does not open, or the link expires, ask Claude to retry the Alchemy connection.
  • Composio creates a fresh Alchemy authorization link.
  • Open that link in your browser and finish the Alchemy sign-in.

4. Why do Alchemy actions fail after they worked before?

The Alchemy connection can expire or lose permission.

  • Ask Claude to inspect the Alchemy connection.
  • If the connection is unhealthy, disconnect it when Claude prompts you.
  • Reconnect the Alchemy account and retry the action.
  • If Claude shows a permission prompt, approve it before Claude changes data in Alchemy.
  • If the action still fails with a permission error, check that the connected account has that permission in Alchemy itself.

5. How do I switch to a different Alchemy account?

Claude can manage the Alchemy connection for you.

  • Ask Claude to disconnect or delete the current Alchemy account.
  • Ask Claude to connect Alchemy again.
  • Open the new Composio authorization link for Alchemy.
  • Sign in with the other Alchemy account in the browser.
  • After the account connects, ask Claude to retry the Alchemy task.

6. Why is my Alchemy connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your Alchemy connection works in Claude Web, Desktop, and Cowork.

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Alchemy tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
  • On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect Alchemy.
TOOLS

Supported Tools

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

Compute NFT Rarity

Tool to compute the rarity of each attribute for a specific NFT based on its collection.

Get NFT Collection Metadata

Tool to get metadata for an NFT collection using its marketplace slug (OpenSea, LooksRare, etc).

Get Collections for Owner

Tool to retrieve all NFT collections held by a specified owner address.

Get Contract Metadata Batch V3

Tool to retrieve metadata for multiple NFT contracts in a single batch request.

Get Contract Metadata V3

Tool to get the metadata for an NFT contract including name, symbol, total supply, and token type (ERC721/ERC1155).

Get Contracts for Owner (NFT API v3)

Tool to get all NFT contracts owned by an address with contract metadata.

Get NFT Floor Price

Tool to get the floor price for an NFT collection across multiple marketplaces (OpenSea, LooksRare, etc).

Get Historical Token Prices

Retrieves historical price data for a token over a specified time range with configurable intervals.

Get NFT Contracts By Address

Tool to retrieve NFT contracts associated with one or more wallet addresses across multiple blockchain networks.

Get NFT Metadata

Tool to retrieve comprehensive metadata for a specific NFT, including contract details, media URLs, attributes, ownership info, and OpenSea data.

Get NFT Metadata Batch

Tool to retrieve metadata for multiple NFTs in a single request (up to 100 NFTs), including contract details, media URLs, attributes, and collection data.

Get NFT Sales V3

Retrieves NFT sales that have occurred through on-chain marketplaces using Alchemy's v3 API.

Get NFTs for Collection V3

Retrieves all NFTs in a collection using OpenSea collection slug or contract address.

Get NFTs for Contract

Retrieves all NFTs for a given NFT contract address.

Get NFTs for Owner

Tool to get all NFTs currently owned by a given address.

Get Owners for Collection

Tool to retrieve all owner addresses for a given NFT collection contract.

Get Owners for Contract

Tool to get all owners of NFTs in a contract with optional token balances.

Get NFT Owners (v3)

Tool to retrieve all owners for a specific NFT using Alchemy's v3 API.

Get Portfolio NFTs By Address

Tool to fetch NFTs owned by multiple wallet addresses across different blockchain networks.

Get Token Prices By Symbol

Tool to get current token prices by symbol (e.

Get Token Balances

This tool retrieves ERC20 token balances for a specified Ethereum address.

Get Token Balances By Address

Tool to get token balances for wallet addresses across multiple networks using Alchemy's Portfolio API.

Get Token Metadata

Retrieves metadata for an ERC-20 token on Ethereum mainnet, including its name, symbol, decimals, and logo URL.

Get Token Prices By Address

Retrieves current token prices by contract address and network from decentralized exchanges (DEXes).

Get Tokens By Address

Tool to fetch fungible tokens (native, ERC-20, SPL) for multiple wallet addresses across networks.

Get Transaction Count

This tool retrieves the number of transactions sent from a specific address (also known as the nonce).

Get Transactions History By Address

Tool to get transaction history for wallet addresses across multiple networks using Alchemy's Data API.

Invalidate NFT Contract Cache

Tool to invalidate the cached metadata for an NFT contract.

Check If NFT Is Airdrop

Tool to check if a specific NFT token is marked as an airdrop.

Check If NFT Is Airdrop

Tool to determine whether an NFT was airdropped to the owner address.

Check Collection Ownership

Tool to check if a wallet address owns any token from a specific NFT collection.

Check NFT Holder Status

Tool to check if a wallet address holds any NFTs from a specific contract.

Check if Contract is Spam

Tool to check if an NFT contract is marked as spam by Alchemy.

Check if Contract is Spam (V3)

Tool to determine if a specific NFT contract is marked as spam by Alchemy.

Search NFT Contract Metadata

Tool to search for keywords across metadata of all ERC-721 and ERC-1155 smart contracts.

Summarize NFT Attributes

Retrieves a comprehensive summary of all attributes and traits for NFTs in a collection, including trait counts and distribution statistics.

FRAMEWORKS

How to build Alchemy MCP Agent with another framework

Claude Code logo

Claude Code

Use Alchemy MCP with Claude Code

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Alchemy MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Alchemy MCP with Claude Agent SDK

Codex logo

Codex

Use Alchemy MCP with Codex

OpenClaw logo

OpenClaw

Use Alchemy MCP with OpenClaw

Hermes logo

Hermes

Use Alchemy MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Alchemy MCP with Atomic Agent

Google ADK logo

Google ADK

Use Alchemy MCP with Google ADK

LangChain logo

LangChain

Use Alchemy MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Alchemy MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Alchemy MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Alchemy MCP with LlamaIndex

CrewAI logo

CrewAI

Use Alchemy MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use Alchemy MCP with Pydantic AI

AutoGen logo

AutoGen

Use Alchemy MCP with AutoGen

FAQ

Frequently asked questions

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

Yes, you can. Claude Cowork 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 Alchemy tools.

Yes, absolutely. You can configure which Alchemy 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 Alchemy data and credentials are handled as safely as possible.

Start with Alchemy.It takes 30 seconds.

Managed auth, hosted MCP servers, and every Alchemy tool your agent needs.Free to start.

Start building