Loan & Mortgage Calculator
Amortizing loan or mortgage: periodic payment, total interest, payoff date, effect of extra payments and a yearly or full payment schedule. Any payment frequency.
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 0.002 USDC on Base to 0x1129…e1871. The signed payment is good for 5 minutes.
- Paid to
- 0x1129…e1871
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 2000 smallest units
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0x1129…e1871
- Token contract
- 0x3c49…c3359
- Payment window
- 5 minutes
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0x1129…e1871
- Token contract
- 0xaf88…e5831
- Payment window
- 5 minutes
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x1129A6BB9C6165FF07fdC509c107B522CA0e1871",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x1129A6BB9C6165FF07fdC509c107B522CA0e1871",
"amount": "2000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x1129A6BB9C6165FF07fdC509c107B522CA0e1871",
"amount": "2000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"years": 30,
"schedule": "none",
"principal": 300000,
"annual_rate_pct": 6.5
}
},
"output": {
"type": "json",
"example": {
"years": 30,
"payment": 1896.2,
"schedule": null,
"principal": 300000,
"total_paid": 682633.47,
"payoff_date": "2056-10-26",
"total_interest": 382633.47,
"annual_rate_pct": 6.5,
"payments_per_year": 12,
"number_of_payments": 360,
"payment_with_extra": 1896.2,
"interest_saved_by_extra": 0
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"principal",
"annual_rate_pct",
"years"
],
"properties": {
"years": {
"type": "number",
"description": "Term in years"
},
"schedule": {
"type": "string",
"description": "none, yearly or full"
},
"principal": {
"type": "number",
"description": "Amount borrowed"
},
"start_date": {
"type": "string",
"description": "First period YYYY-MM-DD"
},
"extra_payment": {
"type": "number",
"description": "Extra principal paid each period"
},
"annual_rate_pct": {
"type": "number",
"description": "Annual interest rate in %"
},
"payments_per_year": {
"type": "integer",
"description": "1, 2, 4, 12, 24, 26 or 52"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-26 10:43Z
- Last indexed by Roundhouse
- 2026-10-27 01:30Z
- Last enriched (probe, favicon, geo)
- —
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- Not probed
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
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Loan & Mortgage Calculator 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=Loan%20%26%20Mortgage%20Calculator' 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://bess-x402.onrender.com/v1/finance/loan, 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. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.