{"slug":"invert-a-matrix-878acd85","name":"Invert a matrix","summary":"Invert a square matrix via Gauss-Jordan elimination. A non-square, ragged or empty matrix is a clean 400. A singular (non-invertible) matrix is NOT an error — it returns a successful { invertible:false, inverse:null }.","status":"live","indexable":false,"listed_since":"2026-10-25T17:53:27.505995Z","sources":[{"source":"x402_bazaar","external_id":"https://matrix.openverbs.com/v1/inverse","owner_address":"0xb3f4de103f34b99f0da19b4f16d6b53a14c2194a","seen_at":"2026-10-31T18:53:25.191917Z","removed_at":"2026-11-03T19:55:37.893248Z"}],"endpoints":[{"url":"https://matrix.openverbs.com/v1/inverse","host":"matrix.openverbs.com","protocol":"x402","state":"live","last_probe_at":"2026-11-03T00:16:52.213369Z","last_ok_at":"2026-11-03T00:16:52.213369Z","tools_count":null,"tools_changed_at":null,"uptime_24h":1.0,"uptime_30d":1.0}],"also_listed_as":[{"slug":"matrix-openverbs-com-6a4822ff","name":"matrix.openverbs.com"}],"payment_options":[{"endpoint_url":"https://matrix.openverbs.com/v1/inverse","network":"eip155:8453","scheme":"exact","rail":"exact","asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","coin":"USDC","asset_label":"USD Coin","amount":"4000","pay_to":"0xb3f4de103f34b99f0da19b4f16d6b53a14c2194a","observed_at":"2026-11-03T00:16:52.213369Z"}],"usage":null,"assessment":{"method":"2026.10.2","checks":[{"id":"answers","state":"pass","reason":"Answered a check 19 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 9 days; 30 are needed."},{"id":"real_customers","state":"fail","reason":"No source reports paying wallets in the last 30 days."},{"id":"clean_scan","state":"not_applicable","reason":"Not an MCP server."}],"passed":1,"applicable":4,"contradicted":false,"computed_at":"2026-11-03T19:56:08.632221Z"},"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."}