{"name":"onyx_x402_indexer_health","tier":"free","price_usdc":"0","endpoint":"https://onyx-actions.onrender.com/v1/onyx_x402_indexer_health","method":"POST","input_schema":{"type":"object","properties":{"url":{"type":"string","description":"Domain or full URL to check (e.g. 'onyx-actions.onrender.com' or 'https://api.oatp.cc')."}},"required":["url"]},"description":"Is your x402 endpoint actually discoverable? Probes 6 indexers agents use (CDP discovery, Bazaar mirror, awesome-x402 README, awesome-mcp-servers README, x402scan, Smithery) and returns per-indexer presence + a single recommended action. Free tier — every paid-MCP-builder hits the same invisible-launch problem and this is the missing observability tool.","when_to_use":"You just shipped a paid x402 endpoint and your inbound is $0. Before writing another tool, verify you're actually findable.","vs_alternatives":"Manually visiting 6 indexer sites and ctrl-F-ing your domain. This is one call, structured output, with a single ranked action.","example_request":{"url":"api.oatp.cc"},"example_response":null,"settle_to":"0x3fD9ee1373562f894D322B37DFFAd7a5D2b2d78f","network":"base","facilitator":"https://facilitator.xpay.sh","payment_required":false,"free_introspection":true,"note":"GET this URL = free introspection card. POST with x402 payment header to call."}