x402toll.com
Trustless verified answers for AI agents: 56 financial, tax & legal calculators sold per call in USDC on Base via x402. Every answer ships its 2026 source, a formula trace, and a reproducible hash — re-derive it yourself for free at /v1/golden/:id. Don
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
Pay 0.05 USDC on Base to 0x1C99…7E5a9. The signed payment is good for 2 minutes.
- Paid to
- 0x1C99…7E5a9
- USD Coin contract
- 0x8335…02913
- Payment window
- 2 minutes
- As published
- 50000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x1C9923489CD7D75Dd2f6735c48090b8bD4c7E5a9",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"state": "TX",
"salary": 85000,
"filingStatus": "single",
"payFrequency": "biweekly"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"inputs": {
"state": "TX",
"salary": 85000,
"filingStatus": "single",
"payFrequency": "biweekly"
},
"medicare": 1232.5,
"stateTax": 0,
"totalTax": 16372.5,
"ficaTotal": 6502.5,
"netAnnual": 68627.5,
"stateName": "Texas",
"federalTax": 9870,
"netPerCheck": 2639.52,
"stateTaxType": "No state income tax",
"periodsPerYear": 26,
"socialSecurity": 5270,
"effectiveRatePct": 19.26,
"additionalMedicare": 0,
"federalMarginalRatePct": 22
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"salary",
"state"
],
"properties": {
"state": {
"type": "string",
"description": "2-letter US state/DC code"
},
"salary": {
"type": "number",
"maximum": 10000000,
"minimum": 0
},
"filingStatus": {
"enum": [
"single",
"mfj"
],
"type": "string",
"default": "single"
},
"payFrequency": {
"enum": [
"weekly",
"biweekly",
"semimonthly",
"monthly"
],
"type": "string",
"default": "biweekly"
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"inputs": {
"type": "object"
},
"medicare": {
"type": "number"
},
"stateTax": {
"type": "number"
},
"totalTax": {
"type": "number"
},
"ficaTotal": {
"type": "number"
},
"netAnnual": {
"type": "number"
},
"stateName": {
"type": "string"
},
"federalTax": {
"type": "number"
},
"netPerCheck": {
"type": "number"
},
"stateTaxType": {
"type": "string"
},
"periodsPerYear": {
"type": "number"
},
"socialSecurity": {
"type": "number"
},
"effectiveRatePct": {
"type": "number"
},
"additionalMedicare": {
"type": "number"
},
"federalMarginalRatePct": {
"type": "number"
}
},
"additionalProperties": true
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-08-31 08:05Z
- Last indexed by Roundhouse
- 2026-09-24 08:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-23 10:15Z
- x402 version
- 2
- Max timeout
- 120s
- Liveness probe
- HTTP 404
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 24 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service x402toll.com and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=x402toll.com' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://x402toll.com/v1/paycheck, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.