{"slug":"evaluate-expression-3a6bad84","name":"Evaluate expression","summary":"Evaluate a mathematical expression with optional named variables — arithmetic, comparison and logic operators plus functions like sqrt, abs, min, max, sin, cos, log, floor, round, etc. A syntax error, an undefined variable, or a non-finite result is a clean 400. The factorial operator is disabled for safety.","status":"live","indexable":true,"listed_since":"2026-10-25T17:53:06.484232Z","sources":[{"source":"x402_bazaar","external_id":"https://math.openverbs.com/v1/eval","owner_address":"0xb3f4de103f34b99f0da19b4f16d6b53a14c2194a","seen_at":"2026-11-02T19:15:29.965314Z","removed_at":null}],"endpoints":[{"url":"https://math.openverbs.com/v1/eval","host":"math.openverbs.com","protocol":"x402","state":"live","last_probe_at":"2026-11-03T07:54:38.718340Z","last_ok_at":"2026-11-03T07:54:38.718340Z","tools_count":null,"tools_changed_at":null,"uptime_24h":1.0,"uptime_30d":1.0}],"also_listed_as":[{"slug":"math-openverbs-com-d8254c75","name":"math.openverbs.com"}],"payment_options":[{"endpoint_url":"https://math.openverbs.com/v1/eval","network":"eip155:8453","scheme":"exact","rail":"exact","asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","coin":"USDC","asset_label":"USD Coin","amount":"4000","pay_to":"0xb3f4de103f34b99f0da19b4f16d6b53a14c2194a","observed_at":"2026-11-03T07:54:38.718340Z"}],"usage":{"source":"x402_bazaar","unique_payers_30d":2,"paid_calls_30d":2,"last_paid_at":"2026-10-08T05:39:58.133Z","reported_at":"2026-11-02T19:15:29.965314Z"},"assessment":{"method":"2026.10.2","checks":[{"id":"answers","state":"pass","reason":"Answered a check 12 hours ago."},{"id":"owner","state":"fail","reason":"No one has proven control of its domain or of the wallet it is paid at."},{"id":"track_record","state":"fail","reason":"Listed for 8 days; 30 are needed."},{"id":"real_customers","state":"fail","reason":"2 different wallets paid it in 30 days, as the x402 Bazaar reports (not yet counted by addrbook); 10 are needed."},{"id":"clean_scan","state":"not_applicable","reason":"Not an MCP server."}],"passed":1,"applicable":4,"contradicted":false,"computed_at":"2026-11-03T00:34:56.630292Z"},"identity":{"endpoint_domains":["openverbs.com"],"proven_domains":[],"proven_wallets":[],"namesakes":[],"namesake_count":0,"identity_checks":[],"wallet_attestations":[],"human_backings":[]},"replies":[],"customers":null,"scan":null,"notice":"Not affiliated with addrbook — claim or request removal."}