Northline ChainKit
Pay-per-call Base & Arc onchain facts for agents: address risk, USDC payment check, tx explain.
Should I use this
Quality & Safety
Based on automated analysis of tool definitions and protocol compliance.
Context Cost
This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.
Install
One-Click Install
Add this to your `claude_desktop_config.json` file:
{
"mcpServers": {
"chainkit": {
"url": "https://northline-chainkit.northline-c86.workers.dev/mcp"
}
}
}Remote endpoints
https://northline-chainkit.northline-c86.workers.dev/mcpstreamable-httpWhat it can do
Tool inventory
Tools (6)
🟢chainkit_catalog
Free. Lists every ChainKit tool with its price, required inputs and an example, plus how x402 payment works. Call this first.
Input Schema
{
"type": "object",
"properties": {}
}🟢address_profile(chain, address)
Preflight any address on Base or Arc before paying or approving it: EOA vs contract vs EIP-7702-delegated wallet, EIP-1967 proxy implementation/admin, owner(), Safe multisig threshold, ERC-20 metadata, USDC + native balance, Sourcify verification, and risk flags. Costs $0.005 USDC on Base per call via x402 (unpaid calls return the x402 PaymentRequired; any x402 MCP client pays automatically).
Input Schema
{
"type": "object",
"properties": {
"chain": {
"type": "string",
"enum": [
"base",
"arc"
],
"default": "base"
},
"address": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$"
}
},
"required": [
"address"
]
}🟢verify_usdc_payment(chain, tx, to, minAmount, from, ...)
Verify that a transaction paid at least N USDC to an address on Base or Arc (handles Arc native-USDC logs). Returns verified true/false, confirmations, matching transfers and reasons. Use it to confirm a customer paid before delivering. Costs $0.003 USDC on Base per call via x402 (unpaid calls return the x402 PaymentRequired; any x402 MCP client pays automatically).
Input Schema
{
"type": "object",
"properties": {
"chain": {
"type": "string",
"enum": [
"base",
"arc"
],
"default": "base"
},
"tx": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{64}$"
},
"to": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$"
},
"minAmount": {
"type": "string"
},
"from": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$"
},
"minConfirmations": {
"type": "string"
}
},
"required": [
"tx",
"to"
]
}🟢explain_transaction(chain, tx)
Explain a Base or Arc transaction in plain JSON: status, confirmations, fee, method selector, created contract, and every ERC-20 transfer decoded with symbol and decimals. Costs $0.004 USDC on Base per call via x402 (unpaid calls return the x402 PaymentRequired; any x402 MCP client pays automatically).
Input Schema
{
"type": "object",
"properties": {
"chain": {
"type": "string",
"enum": [
"base",
"arc"
],
"default": "base"
},
"tx": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{64}$"
}
},
"required": [
"tx"
]
}🟢network_status(chain)
Live block height, gas price and fee estimates (transfer, ERC-20 transfer, contract call) for Base or Arc. On Arc fees are quoted directly in USDC. Costs $0.001 USDC on Base per call via x402 (unpaid calls return the x402 PaymentRequired; any x402 MCP client pays automatically).
Input Schema
{
"type": "object",
"properties": {
"chain": {
"type": "string",
"enum": [
"base",
"arc"
],
"default": "base"
}
}
}🟢usdc_balances(address)
USDC and native balance of one address on both Base and Arc in a single call. Costs $0.002 USDC on Base per call via x402 (unpaid calls return the x402 PaymentRequired; any x402 MCP client pays automatically).
Input Schema
{
"type": "object",
"properties": {
"address": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$"
}
},
"required": [
"address"
]
}Community
Evidence