This is an MCP server endpoint. It speaks MCP over Streamable HTTP, so connect an MCP client to https://papacasper.com/mcp. Opening this URL in a browser does not show a tool list.
Tools available: 29. Calls are pay-per-call via x402 (USDC on Base), or use a card-paid API key (Authorization: Bearer <key>) from https://papacasper.com/mcp-docs#api-key. tools/list is open for discovery.