{"service":"Tollbooth","tagline":"Verified calculators for AI agents - pay per call, provenance on every answer","dataVintage":"July 2026","disclaimer":"Estimates only — not financial, legal, or tax advice. Computed from published 2026 datasets and stated formulas; verify with a qualified professional before acting.","network":"eip155:8453","costHint":{"currency":"USDC","network":"eip155:8453","priceRange":{"minUsd":0.01,"maxUsd":1},"typicalCallUsd":0.05,"fullCatalogPullUsd":9.97,"toolCount":59,"byTier":{"call":{"count":47,"minUsd":0.01,"maxUsd":0.1},"report":{"count":12,"minUsd":0.1,"maxUsd":1}},"receiptTier":{"minUsd":1,"maxUsd":5,"route":"/v1/receipt/:id","note":"Audit-grade receipt (GVP v0.2): answer + formula trace + versioned sources + reproducible hash + free golden re-derivation + optional Ed25519 issuer attestation + ERC-8004 on-chain anchor. Priced for compliance/insurance filing, not per-cent volume."},"batch":{"priceUsd":0.5,"maxCalls":25,"route":"/v1/batch","note":"Pay once, run up to 25 call-tier calculations: POST {calls:[{tool,inputs,ref?},...]}. Each result carries its own reproducible hash; report-tier SKUs are not batchable. Flat price — unused calls are not refunded."},"fees":{"quotedPriceIsAllIn":true,"buyerPays":"the exact quoted USDC amount to the resource server (payTo); Tollbooth adds no buyer-side facilitator surcharge or markup on top of the quote","settlement":"via the x402 facilitator on Base mainnet (EIP-3009 transferWithAuthorization); network gas and any facilitator fee are borne on the settlement side, never added to your quote","freeSurfaces":"unpaid 402 probes, /v1/preview/*, /v1/golden/*, /v1/catalog, /v1/verify, and /v1/gvp/check are free","refunds":"invalid-input requests return 400 and are never charged; a network-retry with the same payment nonce returns the cached result with no second settlement"},"note":"Prices are per successful call; unpaid 402 probes, previews, and invalid-input 400s are free. Set a per-run USDC budget; a full one-call-per-tool sweep costs fullCatalogPullUsd. Receipt-bearing calls cost the receiptTier. The quoted price is all-in — see `fees`."},"endpoints":[{"id":"paycheck","url":"https://x402toll.com/v1/paycheck","tier":"call","price":"$0.05","category":"Payroll & tax","description":"US net-paycheck breakdown for any of 51 jurisdictions: 2026 federal brackets, FICA (SS wage base $184,500, additional Medicare), and state income tax. 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snowball: smallest balance first); 600-month cap","goldenVector":"$1,000 @ 12% APR, $100/mo minimum -> 11 months to payoff (Reckon VERIFICATION.md 2026-07-08)","inputSchema":{"type":"object","required":["debts"],"properties":{"debts":{"type":"array","minItems":1,"maxItems":8,"items":{"type":"object","required":["balance","apr","minPayment"],"properties":{"name":{"type":"string"},"balance":{"type":"number"},"apr":{"type":"number"},"minPayment":{"type":"number"}}}},"extraMonthly":{"type":"number","default":0}}},"sources":[{"label":"Standard amortization / present-value formula","ref":"Deterministic financial mathematics","asOf":"formula"}],"tags":["lending","debt","plan","full","payoff","report","avalanche","snowball","simulated","month","rollover","order"],"receipt":{"url":"https://x402toll.com/v1/receipt/debt-plan","price":"$5.00"},"relatedTools":[{"id":"dti","url":"https://x402toll.com/v1/lending/dti"},{"id":"loan-comparison","url":"https://x402toll.com/v1/lending/compare"},{"id":"extra-payment","url":"https://x402toll.com/v1/lending/extra-payment"}],"payment":"x402 — call the endpoint, receive HTTP 402 with payment requirements, retry with PAYMENT-SIGNATURE header"},{"id":"llc-50-state","url":"https://x402toll.com/v1/reports/llc-50-state","tier":"report","price":"$0.50","category":"Business","description":"All 51 US jurisdictions ranked by true 5-year LLC cost — filing, reports, franchise taxes, publication requirements — with per-state notes.","method":"computeLlcCost across all 51 jurisdictions, ranked by 5-year total then Year-1 total","goldenVector":"row-level: TX $300 / CA $870 / DE $410 Year-1 (Reckon VERIFICATION.md 2026-07-08)","inputSchema":{"type":"object","properties":{"registeredAgent":{"type":"boolean","default":false}}},"sources":[{"label":"2026 LLC filing/report/franchise fees (51 jurisdictions)","ref":"Each state's Secretary-of-State 2026 fee schedule","asOf":"2026"}],"tags":["business","llc","state","jurisdictions","ranked","true","year","cost","filing","reports","franchise","taxes"],"receipt":{"url":"https://x402toll.com/v1/receipt/llc-50-state","price":"$5.00"},"relatedTools":[{"id":"llc-cost","url":"https://x402toll.com/v1/llc-cost"},{"id":"s-corp-salary","url":"https://x402toll.com/v1/business/s-corp-salary"},{"id":"entity-tax-compare","url":"https://x402toll.com/v1/business/entity-compare"}],"payment":"x402 — call the endpoint, receive HTTP 402 with payment requirements, retry with PAYMENT-SIGNATURE header"},{"id":"relocation-paycheck","url":"https://x402toll.com/v1/reports/relocation-paycheck","tier":"report","price":"$1.00","category":"Payroll & tax","description":"The same salary across all 51 US jurisdictions, ranked by net take-home — the relocation what-if in one call, with per-state tax detail and the best-to-worst annual spread.","method":"computePaycheck across all 51 jurisdictions at the given salary/filing status, ranked by net annual","goldenVector":"row-level: TX $85k single biweekly -> $2,639.52/check (Reckon VERIFICATION.md 2026-07-08)","inputSchema":{"type":"object","required":["salary"],"properties":{"salary":{"type":"number"},"filingStatus":{"type":"string","enum":["single","mfj"],"default":"single"},"payFrequency":{"type":"string","enum":["weekly","biweekly","semimonthly","monthly"],"default":"biweekly"}}},"sources":[{"label":"2026 federal brackets & standard deduction","ref":"IRS Rev. Proc. 2025-32","asOf":"2026"},{"label":"2026 FICA / Social Security wage base $184,500","ref":"SSA 2026 + IRS Notice 2025-67","asOf":"2026"},{"label":"2026 state income-tax schedules (51 jurisdictions)","ref":"State revenue departments / Tax Foundation 2026","asOf":"2026"}],"tags":["payroll & tax","relocation","paycheck","same","salary","across","jurisdictions","ranked","take","home","what","one"],"receipt":{"url":"https://x402toll.com/v1/receipt/relocation-paycheck","price":"$5.00"},"relatedTools":[{"id":"paycheck","url":"https://x402toll.com/v1/paycheck"},{"id":"self-employment-tax","url":"https://x402toll.com/v1/tax/self-employment"},{"id":"estimated-tax","url":"https://x402toll.com/v1/tax/estimated"},{"id":"capital-gains-tax","url":"https://x402toll.com/v1/tax/capital-gains"}],"payment":"x402 — call the endpoint, receive HTTP 402 with payment requirements, retry with PAYMENT-SIGNATURE header"},{"id":"crypto-tax-lot","url":"https://x402toll.com/v1/crypto/tax-lots","tier":"report","price":"$0.25","category":"Crypto & DeFi","description":"Match a crypto sale against buy lots (FIFO / LIFO / HIFO), returning realized gain/loss split short- vs long-term (IRS >365-day rule) plus the remaining lots.","method":"order lots by method (FIFO=oldest, LIFO=newest, HIFO=highest cost); consume the sale qty; per matched portion gain = qty*(sellPrice - lotPrice), term = long if held > 365 days else short","goldenVector":"buy 1@$30k(2024-01-01)+1@$40k(2025-06-01), sell 1@$50k(2025-07-01): FIFO $20k long, LIFO/HIFO $10k short (hand-verified)","inputSchema":{"type":"object","required":["lots","sale"],"properties":{"method":{"type":"string","enum":["fifo","lifo","hifo"],"default":"fifo"},"lots":{"type":"array","minItems":1,"maxItems":200,"items":{"type":"object","required":["qty","priceUsd","date"],"properties":{"qty":{"type":"number"},"priceUsd":{"type":"number"},"date":{"type":"string"}}}},"sale":{"type":"object","required":["qty","priceUsd","date"],"properties":{"qty":{"type":"number"},"priceUsd":{"type":"number"},"date":{"type":"string"}}}}},"sources":[{"label":"Cost-basis lot matching (FIFO/LIFO/HIFO); >365-day rule","ref":"IRS capital-gains holding-period rules","asOf":"statutory"}],"tags":["crypto & defi","crypto","lot","match","sale","against","buy","lots","fifo","lifo","hifo","returning"],"receipt":{"url":"https://x402toll.com/v1/receipt/crypto-tax-lot","price":"$5.00"},"relatedTools":[{"id":"capital-gains-tax","url":"https://x402toll.com/v1/tax/capital-gains"},{"id":"impermanent-loss","url":"https://x402toll.com/v1/crypto/impermanent-loss"},{"id":"yield-compare","url":"https://x402toll.com/v1/crypto/yield-compare"}],"payment":"x402 — call the endpoint, receive HTTP 402 with payment requirements, retry with PAYMENT-SIGNATURE header"},{"id":"impermanent-loss","url":"https://x402toll.com/v1/crypto/impermanent-loss","tier":"call","price":"$0.05","category":"Crypto & DeFi","description":"Impermanent loss for a 50/50 constant-product LP position vs simply holding, given the price change of the volatile asset.","method":"IL_fraction = 2*sqrt(r)/(1+r) - 1, r = currentPrice/initialPrice; dollar loss = -IL_fraction * positionValue","goldenVector":"2x price -> -5.7191%, 4x -> -20% (standard AMM reference)","inputSchema":{"type":"object","required":["initialPrice","currentPrice"],"properties":{"initialPrice":{"type":"number"},"currentPrice":{"type":"number"},"positionValueUsd":{"type":"number","default":0}}},"sources":[{"label":"Constant-product AMM invariant (x·y=k)","ref":"Uniswap v2 reference","asOf":"formula"}],"tags":["crypto & defi","impermanent","loss","constant","product","position","simply","holding","given","price","change","volatile"],"receipt":{"url":"https://x402toll.com/v1/receipt/impermanent-loss","price":"$1.00"},"relatedTools":[{"id":"crypto-tax-lot","url":"https://x402toll.com/v1/crypto/tax-lots"},{"id":"apr-apy","url":"https://x402toll.com/v1/crypto/apr-apy"},{"id":"liquidation-price","url":"https://x402toll.com/v1/crypto/liquidation-price"},{"id":"yield-compare","url":"https://x402toll.com/v1/crypto/yield-compare"}],"payment":"x402 — call the endpoint, receive HTTP 402 with payment requirements, retry with PAYMENT-SIGNATURE header"},{"id":"apr-apy","url":"https://x402toll.com/v1/crypto/apr-apy","tier":"call","price":"$0.02","category":"Crypto & DeFi","description":"Convert between APR and APY at any compounding frequency (or continuous).","method":"APY = (1+APR/n)^n - 1; 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