Bankless Onchain
About
Integrates with blockchain networks to enable smart contract interaction, transaction history access, and on-chain data exploration through specialized tools for reading contract state, retrieving ABIs, and filtering event logs.
Details
- Author
- bankless
- Repository
- Bankless/onchain-mcp
- GitHub stars
- 26
- Downloads
- 1,233
- Categories
- Developer Tools, Database, Other, Productivity, Design, AI, Knowledge Base, Frontend, API, Security
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Setting up with Highlight
This MCP is not yet compatible with Highlight’s one-click setup. However, you can still use it with Highlight by following these steps:
- Download and install Highlight from highlightai.com/download
- Navigate to the plugins tab and select "Add Custom Plugin"
-
Configure the plugin with the settings below
Plugin Name
Bankless OnchainCommand (node, npx, python, etc.)npxArguments-
Argument 1
@bankless/onchain-mcp
Environment-
BANKLESS_API_TOKEN
your_api_token_here
Please refer to the README for specific instructions on how to obtain API keys or other required environment variables.
-
Argument 1
- Enable "Start Automatically" if you want the plugin to start when Highlight launches
From the repository
{
"mcpServers": {
"onchain-mcp": {
"command": "npx",
"args": [
"@bankless/onchain-mcp"
]
}
}
}
read_contract
Read contract state from a blockchain. Parameters: network (string, required), contract (string, required), method (string, required), inputs (array, required), outputs (array, required). Returns an array of contract call results.
get_proxy
Gets the proxy address for a given network and contract. Parameters: network (string, required), contract (string, required). Returns the implementation address for the proxy contract.
get_events
Fetches event logs for a given network and filter criteria. Parameters: network (string, required), addresses (array, required), topic (string, required), optionalTopics (array, optional). Returns an object containing event logs matching the filter criteria.
build_event_topic
Builds an event topic signature based on event name and arguments. Parameters: network (string, required), name (string, required), arguments (array, required). Returns a string containing the keccak256 hash of the event signature.
Claude Desktop / Cursor
Paste into your MCP client config file to install this server.
{
"mcpServers": {
"bankless onchain": {
"env": {
"BANKLESS_API_TOKEN": "your_api_token_here"
},
"args": [
"@bankless/onchain-mcp"
],
"command": "npx"
}
}
}Linux
{
"env": {
"BANKLESS_API_TOKEN": "your_api_token_here"
},
"args": [
"@bankless/onchain-mcp"
],
"command": "npx"
}Macos
{
"env": {
"BANKLESS_API_TOKEN": "your_api_token_here"
},
"args": [
"@bankless/onchain-mcp"
],
"command": "npx"
}Windows
{
"env": {
"BANKLESS_API_TOKEN": "your_api_token_here"
},
"args": [
"/c",
"npx",
"@bankless/onchain-mcp"
],
"command": "cmd"
}What can you do with Bankless Onchain MCP?
- Read live contract state— Call any read method on a verified contract across supported networks usingread_contract.
- Resolve proxy implementations— Retrieve the implementation address behind a proxy contract withget_proxy.
- Fetch contract ABI and source— Get the full ABI viaget_abior verified source code and metadata viaget_source.
- Query historical events— Retrieve filtered event logs for one or more contract addresses usingget_events.
- Build event topic hashes— Generate a keccak256 event topic from an event name and argument types withbuild_event_topic.
- Inspect transaction history and details— List past transactions for an address withget_transaction_historyor look up a specific transaction withget_transaction_info.
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