Northline ChainKit MCP Server

by workers-northline-c86-northline-chainkit Your server? Claim it

answering

Northline ChainKit is answering right now. Last checked 12 min ago. It exposes 6 tools.

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

Uptime history 8 days of history

8 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

112 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check Northline ChainKit every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add chainkit --transport http https://northline-chainkit.northline-c86.workers.dev/mcp

Settings → Connectors → Add custom connector, then paste this address

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

~/.codex/config.toml

[mcp_servers.chainkit]
url = "https://northline-chainkit.northline-c86.workers.dev/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "chainkit": {
      "url": "https://northline-chainkit.northline-c86.workers.dev/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "chainkit": {
      "type": "http",
      "url": "https://northline-chainkit.northline-c86.workers.dev/mcp"
    }
  }
}

Available tools 6

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

address

address_profile

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).

chainkit

chainkit_catalog

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

explain

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).

network

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).

usdc

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).

verify

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).

Endpoints

URL	Transport	State	Latency	Checked
https://northline-chainkit.northline-c86.workers.dev/mcp	streamable-http	answering	80 ms	12 min ago

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Northline ChainKit — questions

Answers built from our own checks of this server.

What can Northline ChainKit do?

It exposes 6 tools, read directly from the server on our last check. Among them: address_profile, chainkit_catalog, explain_transaction, network_status, usdc_balances, verify_usdc_payment. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Northline ChainKit working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 112 ms. The bar chart above shows every period we have measured.

How do I connect Northline ChainKit?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Northline ChainKit need an API key?

No. Northline ChainKit completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 6 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Northline ChainKit?

It answers our handshake in 112 ms on average, which is faster than 90% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.