{"available":true,"question":"How many agent tools actually work?","answer":"As of 2026-11-11 14:47 UTC, 68,896 of the 92,980 agent tools we index (74.1%) answered our latest probe, 44,063 (47.4%) passed a full protocol check, and 39,783 (42.8%) are ready for an agent to call.","as_of":"2026-11-11 14:47 UTC","by_protocol":[{"kind":"x402","label":"x402 APIs","indexed":24411,"reachable":10037,"verified":7649,"ready":5164,"reachable_pct":41.1,"verified_pct":31.3,"ready_pct":21.2,"median_latency_ms":222,"p95_latency_ms":1071,"uptime_tracked":23796,"uptime_100_pct":36.6},{"kind":"mcp","label":"MCP servers","indexed":61235,"reachable":52572,"verified":34215,"ready":33630,"reachable_pct":85.9,"verified_pct":55.9,"ready_pct":54.9,"median_latency_ms":371,"p95_latency_ms":1186,"uptime_tracked":58798,"uptime_100_pct":79.5},{"kind":"a2a","label":"A2A agents","indexed":7334,"reachable":6287,"verified":2199,"ready":989,"reachable_pct":85.7,"verified_pct":30.0,"ready_pct":13.5,"median_latency_ms":373,"p95_latency_ms":1125,"uptime_tracked":0,"uptime_100_pct":null}],"why_not":{"x402":[{"label":"Answered the probe","count":9998,"pct":41.0},{"label":"Answered, but asks for credentials (401/403)","count":206,"pct":0.8},{"label":"Endpoint not found (404)","count":3211,"pct":13.2},{"label":"Server error (5xx)","count":6850,"pct":28.1},{"label":"Other client error (4xx)","count":1038,"pct":4.3},{"label":"No response (timeout, DNS or TLS failure)","count":3074,"pct":12.6},{"label":"No callable endpoint","count":34,"pct":0.1}],"mcp":[{"label":"Answered the probe","count":36777,"pct":60.1},{"label":"Answered, but asks for credentials (401/403)","count":16205,"pct":26.5},{"label":"Endpoint not found (404)","count":2583,"pct":4.2},{"label":"Server error (5xx)","count":1534,"pct":2.5},{"label":"Other client error (4xx)","count":1488,"pct":2.4},{"label":"No response (timeout, DNS or TLS failure)","count":2025,"pct":3.3},{"label":"No callable endpoint","count":623,"pct":1.0}],"a2a":[{"label":"Agent Card fetched and valid","count":6287,"pct":85.7},{"label":"Card fetched, with errors","count":591,"pct":8.1},{"label":"Card not fetched (no response or error)","count":456,"pct":6.2}]},"definitions":{"reachable":"answered our latest daily probe","verified":"valid 402 challenge (x402), full initialize + tools/list (MCP), JSON-RPC reply (A2A)","ready":"readiness grade A or B"},"links":{"page":"https://agent-tools.cloud/stats/usable","json":"https://agent-tools.cloud/stats/usable.json","methodology":"https://agent-tools.cloud/api/v1/methodology"},"license":"CC BY 4.0"}