13 free Base tools: address labels, tx explain, balances, receipts, gas, logs, bytecode.
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Estimate gas needed for a transaction. Useful for dapps and wallets to show users how much gas they'll pay.
Recipient address (0x + 40 hex)
Sender address (0x + 40 hex)
ETH value to send (in wei, hex)
This tool isn't marked read-only, so it may change something on the server or in an account you connected.
Estimate gas needed for a transaction. Useful for dapps and wallets to show users how much gas they'll pay.
| Argument | Type | Description |
|---|---|---|
| to* | string | Recipient address (0x + 40 hex) |
| from* | string | Sender address (0x + 40 hex) |
| value | string | ETH value to send (in wei, hex) |
{
"type": "object",
"required": [
"from",
"to"
],
"properties": {
"to": {
"type": "string",
"description": "Recipient address (0x + 40 hex)"
},
"from": {
"type": "string",
"description": "Sender address (0x + 40 hex)"
},
"value": {
"type": "string",
"description": "ETH value to send (in wei, hex)"
}
}
}Explain a transaction in plain English: who sent what to whom, with address labels. FREE simplified version of our premium explain tool.
| Argument | Type | Description |
|---|---|---|
| tx_hash* | string | Transaction hash (0x + 64 hex) |
{
"type": "object",
"required": [
"tx_hash"
],
"properties": {
"tx_hash": {
"type": "string",
"description": "Transaction hash (0x + 64 hex)"
}
}
}Get a human-readable label for an EVM address (100K+ entity labels: exchanges, bridges, protocols, scams). FREE, no payment required.
| Argument | Type | Description |
|---|---|---|
| address* | string | EVM address (0x + 40 hex) |
{
"type": "object",
"required": [
"address"
],
"properties": {
"address": {
"type": "string",
"description": "EVM address (0x + 40 hex)"
}
}
}Get a risk score (0-100) for an address based on our 100K+ labeled address database. Scam addresses score 90-100; known exchanges/bridges score 0-20; unknown addresses score 50. Use this BEFORE sending funds to verify the destination.
| Argument | Type | Description |
|---|---|---|
| address* | string | EVM address (0x + 40 hex) |
{
"type": "object",
"required": [
"address"
],
"properties": {
"address": {
"type": "string",
"description": "EVM address (0x + 40 hex)"
}
}
}Get ETH balance of an address on Base
| Argument | Type | Description |
|---|---|---|
| address* | string | EVM address (0x + 40 hex) |
{
"type": "object",
"required": [
"address"
],
"properties": {
"address": {
"type": "string",
"description": "EVM address (0x + 40 hex)"
}
}
}Get block details by block number: timestamp, miner, transaction count, gas used.
| Argument | Type | Description |
|---|---|---|
| block_number* | string | Block number (decimal) |
{
"type": "object",
"required": [
"block_number"
],
"properties": {
"block_number": {
"type": "string",
"description": "Block number (decimal)"
}
}
}Get the current latest block number on Base
No arguments.
{
"type": "object",
"properties": {}
}Get contract bytecode at an address. Useful for checking if an address is a contract or a wallet.
| Argument | Type | Description |
|---|---|---|
| address* | string | EVM address (0x + 40 hex) |
{
"type": "object",
"required": [
"address"
],
"properties": {
"address": {
"type": "string",
"description": "EVM address (0x + 40 hex)"
}
}
}Get event logs from a contract in a block range. Useful for tracking transfers, approvals, etc.
| Argument | Type | Description |
|---|---|---|
| to_block* | string | End block number (decimal) |
| from_block* | string | Start block number (decimal) |
| contract_address* | string | Contract address (0x + 40 hex) |
{
"type": "object",
"required": [
"contract_address",
"from_block",
"to_block"
],
"properties": {
"to_block": {
"type": "string",
"description": "End block number (decimal)"
},
"from_block": {
"type": "string",
"description": "Start block number (decimal)"
},
"contract_address": {
"type": "string",
"description": "Contract address (0x + 40 hex)"
}
}
}Get current gas price on Base
No arguments.
{
"type": "object",
"properties": {}
}Get transaction details by hash on Base
| Argument | Type | Description |
|---|---|---|
| tx_hash* | string | Transaction hash (0x + 64 hex) |
{
"type": "object",
"required": [
"tx_hash"
],
"properties": {
"tx_hash": {
"type": "string",
"description": "Transaction hash (0x + 64 hex)"
}
}
}Get transaction receipt by hash: success/failure status, gas used, logs. Useful for checking if a tx succeeded.
| Argument | Type | Description |
|---|---|---|
| tx_hash* | string | Transaction hash (0x + 64 hex) |
{
"type": "object",
"required": [
"tx_hash"
],
"properties": {
"tx_hash": {
"type": "string",
"description": "Transaction hash (0x + 64 hex)"
}
}
}Get USDC balance of an address on Base (stablecoin balance, more useful than ETH for most agents)
| Argument | Type | Description |
|---|---|---|
| address* | string | EVM address (0x + 40 hex) |
{
"type": "object",
"required": [
"address"
],
"properties": {
"address": {
"type": "string",
"description": "EVM address (0x + 40 hex)"
}
}
}Search all labeled addresses by category (e.g. exchange, bridge, protocol, scam). Returns up to 50 matches.
| Argument | Type | Description |
|---|---|---|
| category* | string | Category to search: exchange, bridge, protocol, scam, nft, defi, other |
{
"type": "object",
"required": [
"category"
],
"properties": {
"category": {
"type": "string",
"description": "Category to search: exchange, bridge, protocol, scam, nft, defi, other"
}
}
}