{"slug":"us-tax-calculators-0b33bb06","name":"US Tax Calculators","summary":"IRS retirement and HSA contribution limits by year: 401(k), IRA, catch-up, SIMPLE, HSA, with an age-adjusted personal limit.","status":"live","headings":[{"slug":"calculators","title":"Calculators & converters"},{"slug":"banking-tax","title":"Banking, tax & accounting"}],"indexable":true,"listed_since":"2026-11-02T19:13:29.817505Z","sources":[{"source":"x402_bazaar","external_id":"https://us-tax-calc.x402tookit.com/retirement-limits","owner_address":"0xb531320805c5bed1d46aeadcf4f008fdf172dbda","seen_at":"2026-11-10T10:13:26.426779Z","removed_at":null}],"endpoints":[{"url":"https://us-tax-calc.x402tookit.com/retirement-limits","host":"us-tax-calc.x402tookit.com","protocol":"x402","state":"live","last_probe_at":"2026-11-10T13:47:09.485699Z","last_ok_at":"2026-11-10T13:47:09.485699Z","tools_count":null,"tools_changed_at":null,"uptime_24h":1.0,"uptime_30d":1.0}],"also_listed_as":[{"slug":"us-tax-calc-x402tookit-com-9312cba3","name":"us-tax-calc.x402tookit.com"}],"payment_options":[{"endpoint_url":"https://us-tax-calc.x402tookit.com/retirement-limits","network":"eip155:8453","scheme":"exact","rail":"exact","asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","coin":"USDC","asset_label":"USD Coin","amount":"20000","pay_to":"0xb531320805c5bed1d46aeadcf4f008fdf172dbda","observed_at":"2026-11-10T13:47:09.485699Z"},{"endpoint_url":"https://us-tax-calc.x402tookit.com/retirement-limits","network":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","scheme":"exact","rail":"exact","asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","coin":"USDC","asset_label":null,"amount":"20000","pay_to":"DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s","observed_at":"2026-11-10T13:47:09.485699Z"},{"endpoint_url":"https://us-tax-calc.x402tookit.com/retirement-limits","network":"eip155:137","scheme":"exact","rail":"exact","asset":"0x3c499c542cef5e3811e1192ce70d8cc03d5c3359","coin":"USDC","asset_label":"USD Coin","amount":"20000","pay_to":"0xb531320805c5bed1d46aeadcf4f008fdf172dbda","observed_at":"2026-11-10T13:47:09.485699Z"}],"usage":{"source":"x402_bazaar","unique_payers_30d":1,"paid_calls_30d":1,"last_paid_at":"2026-11-01T23:23:27.996Z","reported_at":"2026-11-10T10:13:26.426779Z"},"assessment":{"method":"2026.11.3","checks":[{"id":"answers","state":"pass","reason":"Answered a check 1 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 7 days; 30 are needed."},{"id":"real_customers","state":"fail","reason":"1 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":"2026-11-10T15:05:55.102405Z"},"identity":{"endpoint_domains":["x402tookit.com"],"proven_domains":[],"proven_wallets":[],"namesakes":[{"slug":"us-tax-calculators-36acd3cb","name":"US Tax Calculators","proven_domain":null},{"slug":"us-tax-calculators-994fdda6","name":"US Tax Calculators","proven_domain":null},{"slug":"us-tax-calculators-c903e601","name":"US Tax Calculators","proven_domain":null},{"slug":"us-tax-calculators-34f6208b","name":"US Tax Calculators","proven_domain":null},{"slug":"us-tax-calculators-2c1d9c0a","name":"US Tax Calculators","proven_domain":null},{"slug":"us-tax-calculators-bbba5b66","name":"US Tax Calculators","proven_domain":null},{"slug":"us-tax-calculators-9ae2d90b","name":"US Tax Calculators","proven_domain":null}],"namesake_count":7,"identity_checks":[],"wallet_attestations":[],"human_backings":[]},"replies":[],"customers":null,"scan":null,"notice":"Not affiliated with addrbook — claim or request removal."}