Northline ChainKit

dev.workers.northline-c86.northline-chainkitPublished by northline-chainkit.northline-c86.workers.devOfficial publisherv1.1.0Updated Oct 29, 2026

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

VerifiedStreamable HTTPWeb executableFinanceSecurity & Monitoring

Overview

AI-generated overview

Remote MCP server giving assistants pay-per-call onchain facts for Base and Arc: address risk profiles, USDC payment checks, transaction explanations, fees…

What you can do
  • List the server's tools, prices, required inputs and how x402 payment works
  • Profile an address on Base or Arc: EOA vs contract vs delegated wallet, proxy implementation and admin, owner, Safe threshold, ERC-20 metadata, balances, verification and risk flags
  • Verify that a transaction paid at least a given amount of USDC to an address, with confirmations and reasons
  • Explain a transaction in plain JSON: status, confirmations, fee, method selector, created contract and decoded ERC-20 transfers
  • Read live block height, gas price and fee estimates for Base or Arc
  • Fetch USDC and native balances of one address on both chains in a single call
When to use it
Useful when an assistant needs to check an address or a USDC payment before acting, explain a Base or Arc transaction, or quote current fees and balances, without running its own node or indexer.
Requirements
Remote streamable HTTP endpoint; no packages, environment variables or headers declared. Paid tools require an x402-capable MCP client that can pay in USDC on Base; the free catalog tool should be called first for prices.
Before you install
Most tools cost $0.001 to $0.005 USDC per call on Base, so an x402-capable client spends real funds automatically; unpaid calls return a payment request. Results are onchain facts for Base and Arc only and should not be treated as financial advice.

Installation

In SourceWeft

  1. Open Northline ChainKit in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/dev.workers.northline-c86.northline-chainkit%2Fchainkit/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

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

Tools

6

chainkit_catalog

ChainKit catalog (free)

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

Takes no parameters.

address_profile

/v1/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).

Parameterschainaddressrequired

verify_usdc_payment

/v1/payment/verify

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).

ParameterstorequiredtxrequiredfromchainminAmountminConfirmations

explain_transaction

/v1/tx/explain

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).

Parameterstxrequiredchain

network_status

/v1/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).

Parameterschain

usdc_balances

/v1/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).

Parametersaddressrequired

Version history

1
  1. v1.1.0LatestOct 29, 2026

Score

72% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts

    Publish an icon in the registry entry.

  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.