base-blockchain

Name: base-blockchain
Author: AlexAI-MCP

132stars24forks

How to install base-blockchain?

alexai-mcp/hermes-ccc/base-blockchain

$npx -y skills add AlexAI-MCP/hermes-CCC --skill base-blockchain

Installs into the current project.

Summary

Query Base (Ethereum L2) blockchain data — wallet balances, token info, transactions, gas analysis, contract inspection. No API key required.

Files · 1

View on GitHub

SKILL.md

1	# Base Blockchain
2
3	Query Base (Ethereum L2) on-chain data enriched with USD pricing. No API key needed — uses public RPC + CoinGecko.
4
5	## Base RPC Endpoints
6
7	```
8	Mainnet: https://mainnet.base.org
9	Testnet: https://sepolia.base.org
10	Chain ID: 8453 (mainnet) / 84532 (testnet)
11	```
12
13	## Python Setup
14
15	```python
16	import urllib.request, json
17
18	RPC = "https://mainnet.base.org"
19
20	def rpc_call(method, params=[]):
21	payload = json.dumps({"jsonrpc":"2.0","method":method,"params":params,"id":1}).encode()
22	req = urllib.request.Request(RPC, data=payload, headers={"Content-Type":"application/json"})
23	with urllib.request.urlopen(req) as r:
24	return json.loads(r.read())["result"]
25	```
26
27	---
28
29	## Wallet Balance
30
31	```python
32	def get_eth_balance(address):
33	hex_balance = rpc_call("eth_getBalance", [address, "latest"])
34	return int(hex_balance, 16) / 1e18
35
36	addr = "0xYourWalletAddress"
37	print(f"Balance: {get_eth_balance(addr):.6f} ETH")
38	```
39
40	---
41
42	## ERC-20 Token Balance
43
44	```python
45	# balanceOf(address) = keccak256 first 4 bytes = 0x70a08231
46	def get_token_balance(token_addr, wallet_addr, decimals=18):
47	data = "0x70a08231" + wallet_addr[2:].zfill(64)
48	result = rpc_call("eth_call", [{"to": token_addr, "data": data}, "latest"])
49	return int(result, 16) / (10 ** decimals)
50
51	# USDC on Base (6 decimals)
52	usdc = "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
53	print(f"USDC: {get_token_balance(usdc, addr, decimals=6):.2f}")
54	```
55
56	---
57
58	## Transaction Details
59
60	```python
61	def get_tx(tx_hash):
62	return rpc_call("eth_getTransactionByHash", [tx_hash])
63
64	def get_tx_receipt(tx_hash):
65	return rpc_call("eth_getTransactionReceipt", [tx_hash])
66
67	tx = get_tx("0xabc123...")
68	print(f"From: {tx['from']}")
69	print(f"To: {tx['to']}")
70	print(f"Value: {int(tx['value'],16)/1e18} ETH")
71	```
72
73	---
74
75	## Gas Analysis
76
77	```python
78	def get_gas_price():
79	hex_gas = rpc_call("eth_gasPrice")
80	gwei = int(hex_gas, 16) / 1e9
81	return gwei
82
83	print(f"Gas price: {get_gas_price():.2f} Gwei")
84
85	# Estimate gas for a transfer
86	def estimate_gas(from_addr, to_addr, value_eth):
87	return rpc_call("eth_estimateGas", [{
88	"from": from_addr,
89	"to": to_addr,
90	"value": hex(int(value_eth * 1e18))
91	}])
92	```
93
94	---
95
96	## ETH Price (CoinGecko)
97
98	```python
99	def get_eth_price_usd():
100	url = "https://api.coingecko.com/api/v3/simple/price?ids=ethereum&vs_currencies=usd"
101	with urllib.request.urlopen(url) as r:
102	return json.loads(r.read())["ethereum"]["usd"]
103
104	price = get_eth_price_usd()
105	balance = get_eth_balance(addr)
106	print(f"Portfolio: ${balance * price:.2f} USD")
107	```
108
109	---
110
111	## Block Info
112
113	```python
114	def get_latest_block():
115	return rpc_call("eth_getBlockByNumber", ["latest", False])
116
117	block = get_latest_block()
118	print(f"Block: {int(block['number'],16)}")
119	print(f"Txs: {len(block['transactions'])}")
120	```
121
122	---
123
124	## Contract Inspection
125
126	```python
127	# Check if address is a contract
128	def is_contract(address):
129	code = rpc_call("eth_getCode", [address, "latest"])
130	return code != "0x"
131
132	# Read contract storage slot
133	def get_storage(address, slot):
134	return rpc_call("eth_getStorageAt", [address, hex(slot), "latest"])
135	```
136
137	---
138
139	## Basescan API (optional)
140
141	For detailed tx history, use Basescan API (free key at basescan.org):
142	```python
143	BASESCAN = "https://api.basescan.org/api"
144	# Get tx list for address
145	params = f"?module=account&action=txlist&address={addr}&apikey=YOUR_KEY"
146	```

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base-blockchain

132stars24forks

View on GitHub

How to install base-blockchain?

alexai-mcp/hermes-ccc/base-blockchain

$npx -y skills add AlexAI-MCP/hermes-CCC --skill base-blockchain

Installs into the current project.

Summary

Query Base (Ethereum L2) blockchain data — wallet balances, token info, transactions, gas analysis, contract inspection. No API key required.

Files · 1

View on GitHub

SKILL.md

1	# Base Blockchain
2
3	Query Base (Ethereum L2) on-chain data enriched with USD pricing. No API key needed — uses public RPC + CoinGecko.
4
5	## Base RPC Endpoints
6
7	```
8	Mainnet: https://mainnet.base.org
9	Testnet: https://sepolia.base.org
10	Chain ID: 8453 (mainnet) / 84532 (testnet)
11	```
12
13	## Python Setup
14
15	```python
16	import urllib.request, json
17
18	RPC = "https://mainnet.base.org"
19
20	def rpc_call(method, params=[]):
21	payload = json.dumps({"jsonrpc":"2.0","method":method,"params":params,"id":1}).encode()
22	req = urllib.request.Request(RPC, data=payload, headers={"Content-Type":"application/json"})
23	with urllib.request.urlopen(req) as r:
24	return json.loads(r.read())["result"]
25	```
26
27	---
28
29	## Wallet Balance
30
31	```python
32	def get_eth_balance(address):
33	hex_balance = rpc_call("eth_getBalance", [address, "latest"])
34	return int(hex_balance, 16) / 1e18
35
36	addr = "0xYourWalletAddress"
37	print(f"Balance: {get_eth_balance(addr):.6f} ETH")
38	```
39
40	---
41
42	## ERC-20 Token Balance
43
44	```python
45	# balanceOf(address) = keccak256 first 4 bytes = 0x70a08231
46	def get_token_balance(token_addr, wallet_addr, decimals=18):
47	data = "0x70a08231" + wallet_addr[2:].zfill(64)
48	result = rpc_call("eth_call", [{"to": token_addr, "data": data}, "latest"])
49	return int(result, 16) / (10 ** decimals)
50
51	# USDC on Base (6 decimals)
52	usdc = "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
53	print(f"USDC: {get_token_balance(usdc, addr, decimals=6):.2f}")
54	```
55
56	---
57
58	## Transaction Details
59
60	```python
61	def get_tx(tx_hash):
62	return rpc_call("eth_getTransactionByHash", [tx_hash])
63
64	def get_tx_receipt(tx_hash):
65	return rpc_call("eth_getTransactionReceipt", [tx_hash])
66
67	tx = get_tx("0xabc123...")
68	print(f"From: {tx['from']}")
69	print(f"To: {tx['to']}")
70	print(f"Value: {int(tx['value'],16)/1e18} ETH")
71	```
72
73	---
74
75	## Gas Analysis
76
77	```python
78	def get_gas_price():
79	hex_gas = rpc_call("eth_gasPrice")
80	gwei = int(hex_gas, 16) / 1e9
81	return gwei
82
83	print(f"Gas price: {get_gas_price():.2f} Gwei")
84
85	# Estimate gas for a transfer
86	def estimate_gas(from_addr, to_addr, value_eth):
87	return rpc_call("eth_estimateGas", [{
88	"from": from_addr,
89	"to": to_addr,
90	"value": hex(int(value_eth * 1e18))
91	}])
92	```
93
94	---
95
96	## ETH Price (CoinGecko)
97
98	```python
99	def get_eth_price_usd():
100	url = "https://api.coingecko.com/api/v3/simple/price?ids=ethereum&vs_currencies=usd"
101	with urllib.request.urlopen(url) as r:
102	return json.loads(r.read())["ethereum"]["usd"]
103
104	price = get_eth_price_usd()
105	balance = get_eth_balance(addr)
106	print(f"Portfolio: ${balance * price:.2f} USD")
107	```
108
109	---
110
111	## Block Info
112
113	```python
114	def get_latest_block():
115	return rpc_call("eth_getBlockByNumber", ["latest", False])
116
117	block = get_latest_block()
118	print(f"Block: {int(block['number'],16)}")
119	print(f"Txs: {len(block['transactions'])}")
120	```
121
122	---
123
124	## Contract Inspection
125
126	```python
127	# Check if address is a contract
128	def is_contract(address):
129	code = rpc_call("eth_getCode", [address, "latest"])
130	return code != "0x"
131
132	# Read contract storage slot
133	def get_storage(address, slot):
134	return rpc_call("eth_getStorageAt", [address, hex(slot), "latest"])
135	```
136
137	---
138
139	## Basescan API (optional)
140
141	For detailed tx history, use Basescan API (free key at basescan.org):
142	```python
143	BASESCAN = "https://api.basescan.org/api"
144	# Get tx list for address
145	params = f"?module=account&action=txlist&address={addr}&apikey=YOUR_KEY"
146	```

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