Northline ChainKit

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dev.workers.northline-c86.northline-chainkit/chainkitv1.1.0 Domain verified

Pay-per-call Base & Arc onchain facts for agents: address risk, USDC payment check, tx explain.

Crypto & Web3

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Call this server's tools from your browser. Nothing to install.

https://northline-chainkit.northline-c86.workers.dev/mcp

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Tool list from our last check. Connect live to refresh it.

address_profile Read-only

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).

addressstring, required

chainstring

Tools (6)

address_profile

read-only

Argument	Type	Description
chain	string
address*	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "address"
  ],
  "properties": {
    "chain": {
      "enum": [
        "base",
        "arc"
      ],
      "type": "string",
      "default": "base"
    },
    "address": {
      "type": "string",
      "pattern": "^0x[0-9a-fA-F]{40}$"
    }
  }
}

chainkit_catalog

Free. Lists every ChainKit tool with its price, required inputs and an example, plus how x402 payment works. Call this first.

read-only

No arguments.

Input schema (JSON)

{
  "type": "object",
  "properties": {}
}

explain_transaction

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).

read-only

Argument	Type	Description
tx*	string
chain	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "tx"
  ],
  "properties": {
    "tx": {
      "type": "string",
      "pattern": "^0x[0-9a-fA-F]{64}$"
    },
    "chain": {
      "enum": [
        "base",
        "arc"
      ],
      "type": "string",
      "default": "base"
    }
  }
}

network_status

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).

read-only

Argument	Type	Description
chain	string

Input schema (JSON)

{
  "type": "object",
  "properties": {
    "chain": {
      "enum": [
        "base",
        "arc"
      ],
      "type": "string",
      "default": "base"
    }
  }
}

usdc_balances

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).

read-only

Argument	Type	Description
address*	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "address"
  ],
  "properties": {
    "address": {
      "type": "string",
      "pattern": "^0x[0-9a-fA-F]{40}$"
    }
  }
}

verify_usdc_payment

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).

read-only

Argument	Type	Description
to*	string
tx*	string
from	string
chain	string
minAmount	string
minConfirmations	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "tx",
    "to"
  ],
  "properties": {
    "to": {
      "type": "string",
      "pattern": "^0x[0-9a-fA-F]{40}$"
    },
    "tx": {
      "type": "string",
      "pattern": "^0x[0-9a-fA-F]{64}$"
    },
    "from": {
      "type": "string",
      "pattern": "^0x[0-9a-fA-F]{40}$"
    },
    "chain": {
      "enum": [
        "base",
        "arc"
      ],
      "type": "string",
      "default": "base"
    },
    "minAmount": {
      "type": "string"
    },
    "minConfirmations": {
      "type": "string"
    }
  }
}