MACH Base

Base facts, before your agent acts. Investigate a payment timeout, check wallet funding or identify a smart contract. MACH Base supplies read-only Base mainnet data on demand; no account or API key required.

• MCP endpoint: https://api.mach.gallery/mcp
• Transport: Streamable HTTP
• Official MCP Registry: io.github.TheAliphant/mach-base
• x402 discovery: https://api.mach.gallery/.well-known/x402
• OpenAPI: https://api.mach.gallery/openapi.json
• Docs: https://api.mach.gallery/docs/
• Buyer preflight: https://api.mach.gallery/api/preflight

Start with the agent's question

Agent question	MACH tool	Result	USDC per call / boundary
"My Base payment timed out. What happened?"	base_transaction_context	Transaction and receipt status, confirmations, gas and fee context from a hash	$0.008. Does not alone prove the intended USDC transfer or merchant delivery.
"Can this wallet afford the next action?"	base_wallet_snapshot	Native ETH plus up to ten supplied ERC-20 token balances	$0.005. No wallet custody, signing or transaction broadcast.
"What contract am I about to use?"	base_contract_info	Deployed code, available metadata and common interface detection	$0.005. Not a security audit.

Choose before paying: free MACH chooser · preflight · free live sample. These help select the right tool without buying an onchain query. Paid results require a caller-controlled wallet and authorized x402 payment; adding MCP alone does not authorize spending.

External proof (not a broad adoption claim): PayAPI Market reports a $0.005 USDC paid GET on /api/base/block-number and HTTP 200 (reported transaction). That check covers only the tested route, not the entire tool catalog or repeat customers. MyMCPTools is a directory listing, not payment evidence.

Tool surface

MACH exposes 18 MCP tools: 17 paid read-only Base mainnet data capabilities plus the free mach_choose decision tool. Paid calls use USDC over x402 v2 on Base. No buyer account or API key is required.

Connect

{
  "mcpServers": {
    "mach-base": {
      "type": "http",
      "url": "https://api.mach.gallery/mcp"
    }
  }
}

This repository is a public distribution and metadata repository only. It does not contain the private MACH Base server implementation.