Tools / Crypto & Base
USDC Transfers $0.002 / call
Recent USDC transfers for an address.
GET /v1/base/usdc-transfersLists recent USDC transfers in and out of an address on Base, newest first, each with amount, counterparty, direction, and transaction hash.
Parameters
address required | Address to list transfers for |
limit | Max results, 1-50 (default 20) |
Example
macOS / Linuxcurl -s "https://quartermaster.surewhynot.app/v1/base/usdc-transfers?address=0xc2a36e22ecbf353086cf83e7beea78bc28a64083"curl.exe -s "https://quartermaster.surewhynot.app/v1/base/usdc-transfers?address=0xc2a36e22ecbf353086cf83e7beea78bc28a64083"Unpaid, these return 402 Payment Required with the payment details in the header (add -i to see them). curl.exe ships with Windows 10+ and works in cmd and both PowerShell versions. To actually pay, use an x402 client (see Connect) or call it as the MCP tool. Cost: $0.002 per call.
FAQ
How far back does it look?
Roughly the last three days of Base blocks, bounded to keep the lookup fast and within RPC limits.
How do I pay for this endpoint?
Call it with no payment and you receive HTTP 402 with machine-readable payment requirements. Attach a USDC payment on Base with any x402 client (for example @x402/fetch) and retry — the whole loop is two requests. This call costs $0.002 in USDC.
Do I need an account or API key?
No. There are no accounts, logins, or API keys anywhere in Quartermaster. Payment is per call over the x402 protocol; your wallet is your identity.
Can I call this as an MCP tool instead?
Yes. Quartermaster is also an MCP server at /mcp, so any MCP client (Claude Code, Claude.ai, Cursor) can mount this tool. See /connect for setup.