{"slug":"add-a-duration-to-a-date-4c224c12","name":"Add a duration to a date","summary":"Add an ISO 8601 duration to a start date or date-time and return the resulting UTC instant. Calendar-aware: months and years honor month lengths (e.g. Jan 31 + P1M clamps to the last day of February). A negative-signed duration subtracts.","status":"live","indexable":true,"listed_since":"2026-10-25T17:53:05.385505Z","sources":[{"source":"x402_bazaar","external_id":"https://datetime.openverbs.com/v1/add","owner_address":"0xb3f4de103f34b99f0da19b4f16d6b53a14c2194a","seen_at":"2026-10-26T18:16:52.879517Z","removed_at":null}],"endpoints":[{"url":"https://datetime.openverbs.com/v1/add","host":"datetime.openverbs.com","protocol":"x402","state":"live","last_probe_at":"2026-10-26T07:52:58.193694Z","last_ok_at":"2026-10-26T07:52:58.193694Z","tools_count":null,"tools_changed_at":null,"uptime_24h":1.0,"uptime_30d":1.0}],"also_listed_as":[{"slug":"datetime-openverbs-com-91bc1a99","name":"datetime.openverbs.com"}],"payment_options":[{"endpoint_url":"https://datetime.openverbs.com/v1/add","network":"eip155:8453","scheme":"exact","rail":"exact","asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","coin":"USDC","asset_label":"USD Coin","amount":"2000","pay_to":"0xb3f4de103f34b99f0da19b4f16d6b53a14c2194a","observed_at":"2026-10-26T07:52:58.193694Z"}],"usage":{"source":"x402_bazaar","unique_payers_30d":6,"paid_calls_30d":27,"last_paid_at":"2026-10-26T00:14:48.133Z","reported_at":"2026-10-26T18:16:52.879517Z"},"assessment":{"method":"2026.10.1","checks":[{"id":"answers","state":"pass","reason":"Answered a check 6 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 0 days; 30 are needed."},{"id":"real_customers","state":"fail","reason":"6 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":"2026-10-26T14:48:30.264158Z"},"identity":{"endpoint_domains":["openverbs.com"],"proven_domains":[],"proven_wallets":[],"namesakes":[],"namesake_count":0,"identity_checks":[]},"replies":[],"customers":null,"scan":null,"notice":"Not affiliated with addrbook — claim or request removal."}