Summary
Gives you agent-ready access to Blockscout's blockchain explorer API with 56 tools covering transactions, addresses, tokens, smart contracts, and on-chain metrics. The server is deterministically generated from Blockscout's OpenAPI spec, so every tool maps directly to a real endpoint with no phantom methods. It's hosted and free to use with no authentication required. Reach for this when you need Claude to query blockchain data, analyze contract interactions, or pull network statistics without writing custom API integration code. Built by Junct as part of their agent-readiness layer for crypto infrastructure.
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Public tool metadata for what this MCP can expose to an agent.
15 tools
get_block_infoGet block information like timestamp, gas used, burnt fees, transaction count etc. Can optionally include the list of transaction hashes contained in the block. Transaction hashes are omitted by default; request them only when you truly need them, because on high-traffic chain...3 params
Get block information like timestamp, gas used, burnt fees, transaction count etc. Can optionally include the list of transaction hashes contained in the block. Transaction hashes are omitted by default; request them only when you truly need them, because on high-traffic chain...
Parameters* required
chain_idstringThe ID of the blockchain
include_transactionsvalueIf true, includes a list of transaction hashes from the block.default: false
number_or_hashstringBlock number or hash
get_block_numberRetrieves the block number and timestamp for a specific date/time or the latest block. Use when you need a block height for a specific point in time (e.g., "block at 2024-01-01") or the current chain tip. If `datetime` is provided, finds the block immediately preceding that ti...2 params
Retrieves the block number and timestamp for a specific date/time or the latest block. Use when you need a block height for a specific point in time (e.g., "block at 2024-01-01") or the current chain tip. If `datetime` is provided, finds the block immediately preceding that ti...
Parameters* required
chain_idstringThe ID of the blockchain
datetimevalueThe date and time (ISO 8601 format, e.g. 2025-05-22T23:00:00.00Z) to find the block for. If omitted, returns the latest block.
get_address_by_ens_nameUseful for when you need to convert an ENS domain name (e.g. "blockscout.eth") to its corresponding Ethereum address.1 params
Useful for when you need to convert an ENS domain name (e.g. "blockscout.eth") to its corresponding Ethereum address.
Parameters* required
namestringENS domain name to resolve
get_transactions_by_addressRetrieves native currency transfers and smart contract interactions (calls, internal txs) for an address. **EXCLUDES TOKEN TRANSFERS**: Filters out direct token balance changes (ERC-20, etc.). You'll see calls *to* token contracts, but not the `Transfer` events. For token hist...6 params
Retrieves native currency transfers and smart contract interactions (calls, internal txs) for an address. **EXCLUDES TOKEN TRANSFERS**: Filters out direct token balance changes (ERC-20, etc.). You'll see calls *to* token contracts, but not the `Transfer` events. For token hist...
Parameters* required
addressstringAddress which either sender or receiver of the transaction
age_fromstringStart date and time (e.g 2025-05-22T23:00:00.00Z).
age_tovalueEnd date and time (e.g 2025-05-22T22:30:00.00Z).
chain_idstringThe ID of the blockchain
cursorvalueThe pagination cursor from a previous response to get the next page of results.
methodsvalueA method signature to filter transactions by (e.g 0x304e6ade)
get_token_transfers_by_addressGet ERC-20 token transfers for an address within a specific time range. Use cases: - `get_token_transfers_by_address(address, age_from)` - get all transfers of any ERC-20 token to/from the address since the given date up to the current time - `get_token_transfers_by_address(ad...6 params
Get ERC-20 token transfers for an address within a specific time range. Use cases: - `get_token_transfers_by_address(address, age_from)` - get all transfers of any ERC-20 token to/from the address since the given date up to the current time - `get_token_transfers_by_address(ad...
Parameters* required
addressstringAddress which either transfer initiator or transfer receiver
age_fromstringStart date and time (e.g 2025-05-22T23:00:00.00Z).
age_tovalueEnd date and time (e.g 2025-05-22T22:30:00.00Z). Can be omitted to get all transfers up to the current time.
chain_idstringThe ID of the blockchain
cursorvalueThe pagination cursor from a previous response to get the next page of results.
tokenvalueAn ERC-20 token contract address to filter transfers by a specific token. If omitted, returns transfers of all tokens.
lookup_token_by_symbolSearch for token addresses by symbol or name. Returns multiple potential matches based on symbol or token name similarity. Only the first ``TOKEN_RESULTS_LIMIT`` matches from the Blockscout API are returned.2 params
Search for token addresses by symbol or name. Returns multiple potential matches based on symbol or token name similarity. Only the first ``TOKEN_RESULTS_LIMIT`` matches from the Blockscout API are returned.
Parameters* required
chain_idstringThe ID of the blockchain
symbolstringToken symbol or name to search for
get_contract_abiGet smart contract ABI (Application Binary Interface). An ABI defines all functions, events, their parameters, and return types. The ABI is required to format function calls or interpret contract data.2 params
Get smart contract ABI (Application Binary Interface). An ABI defines all functions, events, their parameters, and return types. The ABI is required to format function calls or interpret contract data.
Parameters* required
addressstringSmart contract address
chain_idstringThe ID of the blockchain
inspect_contract_codeInspects a verified contract's source code or metadata.3 params
Inspects a verified contract's source code or metadata.
Parameters* required
addressstringThe address of the smart contract.
chain_idstringThe ID of the blockchain.
file_namevalueThe name of the source file to inspect. If omitted, returns contract metadata and the list of source files.
read_contractCalls a smart contract function (view/pure, or non-view/pure simulated via eth_call) and returns the decoded result. This tool provides a direct way to query the state of a smart contract. Example: To check the USDT balance of an address on Ethereum Mainnet, you would use the...6 params
Calls a smart contract function (view/pure, or non-view/pure simulated via eth_call) and returns the decoded result. This tool provides a direct way to query the state of a smart contract. Example: To check the USDT balance of an address on Ethereum Mainnet, you would use the...
Parameters* required
abiobjectThe JSON ABI for the specific function being called. This should be a dictionary that defines the function's name, inputs, and outputs. The function ABI can be obtained using the `get_contract_abi`...
addressstringSmart contract address
argsstringA JSON string containing an array of arguments. Example: "["0xabc..."]" for a single address argument, or "[]" for no arguments. Order and types must match ABI inputs. Addresses: use 0x-prefixed st...default: []
blockvalueThe block identifier to read the contract state from. Can be a block number (e.g., 19000000) or a string tag (e.g., 'latest'). Defaults to 'latest'.default: latest
chain_idstringThe ID of the blockchain
function_namestringThe symbolic name of the function to be called. This must match the `name` field in the provided ABI.
get_address_infoGet comprehensive information about an address, including: - Address existence check - Native token (ETH) balance (provided as is, without adjusting by decimals) - First transaction details (block number and timestamp) for age calculation - ENS name association (if any) - Cont...2 params
Get comprehensive information about an address, including: - Address existence check - Native token (ETH) balance (provided as is, without adjusting by decimals) - First transaction details (block number and timestamp) for age calculation - ENS name association (if any) - Cont...
Parameters* required
addressstringAddress to get information about
chain_idstringThe ID of the blockchain
get_tokens_by_addressGet comprehensive ERC20 token holdings for an address with enriched metadata and market data. Returns detailed token information including contract details (name, symbol, decimals), market metrics (exchange rate, market cap, volume), holders count, and actual balance (provided...3 params
Get comprehensive ERC20 token holdings for an address with enriched metadata and market data. Returns detailed token information including contract details (name, symbol, decimals), market metrics (exchange rate, market cap, volume), holders count, and actual balance (provided...
Parameters* required
addressstringWallet address
chain_idstringThe ID of the blockchain
cursorvalueThe pagination cursor from a previous response to get the next page of results.
nft_tokens_by_addressRetrieve NFT tokens (ERC-721, ERC-404, ERC-1155) owned by an address, grouped by collection. Provides collection details (type, address, name, symbol, total supply, holder count) and individual token instance data (ID, name, description, external URL, metadata attributes). Ess...3 params
Retrieve NFT tokens (ERC-721, ERC-404, ERC-1155) owned by an address, grouped by collection. Provides collection details (type, address, name, symbol, total supply, holder count) and individual token instance data (ID, name, description, external URL, metadata attributes). Ess...
Parameters* required
addressstringNFT owner address
chain_idstringThe ID of the blockchain
cursorvalueThe pagination cursor from a previous response to get the next page of results.
get_transaction_infoGet comprehensive transaction information. Unlike standard eth_getTransactionByHash, this tool returns enriched data including decoded input parameters, detailed token transfers with token metadata, transaction fee breakdown (priority fees, burnt fees) and categorized transact...3 params
Get comprehensive transaction information. Unlike standard eth_getTransactionByHash, this tool returns enriched data including decoded input parameters, detailed token transfers with token metadata, transaction fee breakdown (priority fees, burnt fees) and categorized transact...
Parameters* required
chain_idstringThe ID of the blockchain
include_raw_inputvalueIf true, includes the raw transaction input data.default: false
transaction_hashstringTransaction hash
get_chains_listGet the list of known blockchain chains with their IDs. Useful for getting a chain ID when the chain name is known. This information can be used in other tools that require a chain ID to request information.
Get the list of known blockchain chains with their IDs. Useful for getting a chain ID when the chain name is known. This information can be used in other tools that require a chain ID to request information.
No parameter schema in public metadata yet.
direct_api_callCall a raw Blockscout API endpoint for advanced or chain-specific data. Do not include query strings in ``endpoint_path``; pass all query parameters via ``query_params`` to avoid double-encoding. **SUPPORTS PAGINATION**: If response includes 'pagination' field, use the provide...4 params
Call a raw Blockscout API endpoint for advanced or chain-specific data. Do not include query strings in ``endpoint_path``; pass all query parameters via ``query_params`` to avoid double-encoding. **SUPPORTS PAGINATION**: If response includes 'pagination' field, use the provide...
Parameters* required
chain_idstringThe ID of the blockchain
cursorvalueThe pagination cursor from a previous response to get the next page of results.
endpoint_pathstringThe Blockscout API path to call (e.g., '/api/v2/stats'); do not include query strings.
query_paramsvalueOptional query parameters forwarded to the Blockscout API.
Blockscout MCP Server
MCP server for Blockscout. Agent-ready API for Blockscout.
Hosted at blockscout.mcp.junct.dev/mcp. Free to use. No auth. No API key required.
Part of Junct — the agent-readiness layer for the crypto stack.
Quick Start
Add to your MCP client config (Claude Desktop, Cursor, Windsurf):
{
"mcpServers": {
"blockscout": {
"url": "https://blockscout.mcp.junct.dev/mcp",
"transport": "streamable-http"
}
}
}
About
This MCP server is deterministically generated from the Blockscout API specification. Every tool maps 1:1 to a real API endpoint — no hallucinated endpoints, no phantom tools.
- Protocol: Blockscout
- Endpoint:
https://blockscout.mcp.junct.dev/mcp - Transport: Streamable HTTP
- Auth: None required
- Documentation: blockscout.mcp.junct.dev/llms.txt
- Server card: blockscout.mcp.junct.dev/.well-known/mcp/server.json
Links
Keywords
Blockscout, MCP server, DeFi, AI agent, agent-ready API, crypto tools, Model Context Protocol, hosted MCP
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TransportHTTP
UpdatedMar 19, 2026
