Tools / x402 tools
x402 Discover $0.001 / call
Search the Coinbase x402 Bazaar.
GET /v1/x402/discoverRuns a natural-language search over the Coinbase x402 Bazaar and returns matching paid resources with their service names, descriptions, and payment details. Your agent can find tools to use, priced and ready.
Parameters
query required | Natural-language search |
limit | Max results, 1-20 (default 10) |
Example
macOS / Linuxcurl -s "https://quartermaster.surewhynot.app/v1/x402/discover?query=web%20extraction&limit=5"curl.exe -s "https://quartermaster.surewhynot.app/v1/x402/discover?query=web%20extraction&limit=5"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: $0.001 per call.
FAQ
What is the Bazaar?
Coinbase's discovery catalog of x402 paid resources — the directory agents browse to find tools they can pay for.
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 $0.001 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.