← The evidence ledger
Evidence row 2201864
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://us-tax-calc.x402tookit.com/withholding-estimate
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 0cff58e77c369e5e9ebea2182a0656fffbc399c90b4ae97eb6124ebb73306bd1
- Leaf
- 0xcefe83ffd30b75d5c2299f30a1ebe67a3d0b3c557d15b303ca44c6a4ebb13409
What was observed
{
"endpoints": [
[
"x402",
"https://us-tax-calc.x402tookit.com/withholding-estimate"
]
],
"name": "US Tax Calculators",
"owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
"raw": {
"accepts": [
{
"amount": "30000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "30000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"transactionVersions": [
0
]
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"scheme": "exact"
},
{
"amount": "30000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "30000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
}
],
"description": "Annual and per-paycheck take-home from salary: federal withholding (IRS percentage method) plus FICA. State tax not included.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"filing_status": "single",
"pay_periods": 26,
"salary": 85000,
"year": 2026
},
"type": "http"
},
"output": {
"example": {
"annual": {
"additionalMedicare": 0,
"federalIncomeTaxWithheld": 9870,
"ficaTotal": 6502.5,
"medicare": 1232.5,
"pretaxBenefits": 0,
"pretaxRetirement": 0,
"socialSecurity": 5270,
"takeHome": 68627.5
},
"asOf": "2026-10-21T05:43:37.419Z",
"degraded": false,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"effectiveFederalWithholdingRate": 0.1161,
"ficaWages": 85000,
"filingStatus": "single",
"grossSalary": 85000,
"incomeTaxWages": 85000,
"notChecked": [
"state and local income tax",
"tax credits (child tax credit, earned income, education, energy) and AMT",
"…5 more"
],
"payPeriodsPerYear": 26,
"perPaycheck": {
"federalIncomeTax": 379.62,
"fica": 250.1,
"gross": 3269.23,
"takeHome": 2639.52
},
"percentageMethod": {
"adjustedAnnualWage": 76400,
"impliedDeduction": 16100,
"zeroPercentRowEndsAt": 7500
},
"reasons": [
"Percentage method (Pub 15-T, Form W-4 2020+, Step 2 box unchecked, no Step 3/4 entries): wages less the table's built-in deduction, taxed on the 2026 schedule; the table was built on a 16100 deduction…",
"This is withholding, not your final tax. State tax is NOT included."
],
"source": "computed locally",
"summary": "2026 Single: on 85000 salary, federal withholding about 9870 and FICA 6502.5 a year, take-home about 68627.5 a year (2639.52 per paycheck, 26 a year), before state tax.",
"taxYear": 2026,
"verdict": "ESTIMATE"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"filing_status": {
"description": "single, mfj, mfs, hoh or qss (W-4 Step 1c)",
"type": "string"
},
"pay_periods": {
"description": "Paychecks per year: 52, 26, 24 or 12 (default 26)",
"type": "integer"
},
"pretax_benefits": {
"description": "Annual section 125 benefits such as health premiums (cuts both)",
"type": "number"
},
"pretax_retirement": {
"description": "Annual 401(k)/403(b) deferral (cuts income-tax wages, not FICA)",
"type": "number"
},
"salary": {
"description": "Annual gross salary, dollars",
"type": "number"
},
"year": {
"description": "Tax year (default: latest bundled)",
"type": "integer"
}
},
"required": [
"salary",
"filing_status"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"annual": {
"properties": {
"additionalMedicare": {
"type": [
"null",
"number"
]
},
"federalIncomeTaxWithheld": {
"type": [
"null",
"number"
]
},
"ficaTotal": {
"type": [
"null",
"number"
]
},
"medicare": {
"type": [
"null",
"number"
]
},
"pretaxBenefits": {
"type": [
"null",
"number"
]
},
"pretaxRetirement": {
"type": [
"null",
"number"
]
},
"socialSecurity": {
"type": [
"null",
"number"
]
},
"takeHome": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"asOf": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"effectiveFederalWithholdingRate": {
"type": [
"null",
"number"
]
},
"ficaWages": {
"type": [
"null",
"number"
]
},
"filingStatus": {
"type": [
"null",
"string"
]
},
"grossSalary": {
"type": [
"null",
"number"
]
},
"incomeTaxWages": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"payPeriodsPerYear": {
"type": [
"null",
"number"
]
},
"perPaycheck": {
"properties": {
"federalIncomeTax": {
"type": [
"null",
"number"
]
},
"fica": {
"type": [
"null",
"number"
]
},
"gross": {
"type": [
"null",
"number"
]
},
"takeHome": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"percentageMethod": {
"properties": {
"adjustedAnnualWage": {
"type": [
"null",
"number"
]
},
"impliedDeduction": {
"type": [
"null",
"number"
]
},
"zeroPercentRowEndsAt": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"taxYear": {
"type": [
"null",
"number"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T23:23:31.013Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-11-01T23:23:30.838Z"
},
"resource": "https://us-tax-calc.x402tookit.com/withholding-estimate",
"serviceName": "US Tax Calculators",
"tags": [
"tax",
"withholding",
"paycheck",
"take-home",
"w4"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Annual and per-paycheck take-home from salary: federal withholding (IRS percentage method) plus FICA. State tax not included."
}What the leaf hashes
{"body":"0cff58e77c369e5e9ebea2182a0656fffbc399c90b4ae97eb6124ebb73306bd1","id":2201864,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646809931756,"prev":null,"subject":"x402_bazaar:https://us-tax-calc.x402tookit.com/withholding-estimate","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
- 0xcefe731251a7efc39ee649396a813871b154bfff457783cfd0d556099c955f87
- 0x49eb4e80d4ebc0d9b69b9b97315c7546a3c3662564e6939e11ec1892ac815318
- 0xf92febf77ef82ee6f7fc839447ada59b21d25e91e567e75df56173a37d44a181
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- 0x0a5c7837daa04aaaa83ce54d92e661614921ebfb2d9d180c8eff3fedbb0381ad
- 0x0c733977de12403b1107bbff417485c8180a2bb76cfdbe8f60f0b05f0411fd74
- 0xc7c759c10fe05b6cdd029226b21efda90b91b5ff9eb5bfa5c85e8f7ee23ac074
- 0x30024ee516f03ff70697ce5b04739940b2d06c13bba1e4b21cf30481ffa580ea
- 0x69e7727ff80179981dcc2e0bc3f3c3cdc253ed02ab82d42d991a74ae9c5dbab2
- 0xf6d6f7d0830ac98279cb74494d34be827d26f7129f65285cf0be75e3ca1f17ad
- 0x72ab42f3c5a6ef5a4044ef2fdc6891273b02682b594ac6044b122a6461ad0992
- 0xdd70b02ace47c3d130058a43d9d07b1c248c91e80e9c82aa580d25929a652bb8
- 0x072f2f6577fd7448e35dd54b73d821e24c8d625a3295181aa05e7da8bcdbf170
- 0x4f21464039902a4044b17c93873adb5a93eecc8e977b4e039acb8cd5f4210b4b
- 0x5b456020389d8e0ef67f16a492c600b5b88189e59398bba308734db7e873e7e4
- 0x37d31d28d0bd3743650d57e9fbf999efa4592cac831267f83aa125335b35a16b
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- 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af