Roundhouse AI

Sindri

Rental property investment calculator. Full multi-year deal analysis for a rental property deal: mortgage, per-category rent/expense growth, a sale scenario, IRR, and cumulative totals over the holding period, alongside the first-year NOI/cap-rate/cash-on-cash snapshot.

OtherLiveeip155:8453Exactvia cdp
https://x402.outpimp.com/rentalPropertyCalculator
Rental property ROIReal estate investingDeal analysis
Calls · 30d
3→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 25 snapshots so far.
$2.41
Verified settled volume
241 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
Listed price
As published in the catalog. Always read the live 402 before paying.
3
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-30 22:17Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x548eFd4f4d4A5C3669dbb4CBB2B1A637FeeEc5F6

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

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.

0.01USDC≈ $0.01 USD
on Base · exact scheme

Pay 0.01 USDC on Base to 0x548e…Ec5F6. The signed payment is good for 5 minutes.

Paid to
0x548e…Ec5F6
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
10000 smallest units
10000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

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
APer2A…fqjRG
Token contract
EPjFWd…TDt1v
Payment window
5 minutes
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x548eFd4f4d4A5C3669dbb4CBB2B1A637FeeEc5F6",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
    },
    "payTo": "APer2AbhckyMWyJanW2MZ2eRLcpL9Lmhks8rkmXfqjRG",
    "amount": "10000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "salePrice": 200000,
          "monthlyHOA": 0,
          "rehabCosts": 0,
          "monthlyRent": 2000,
          "vacancyRate": 0,
          "closingCosts": 0,
          "interestRate": 0,
          "loanTermYears": 10,
          "purchasePrice": 200000,
          "annualInsurance": 0,
          "saleExpensesRate": 0,
          "annualMaintenance": 0,
          "hoaAnnualIncrease": 0,
          "downPaymentPercent": 0.2,
          "holdingLengthYears": 2,
          "rentAnnualIncrease": 0,
          "annualPropertyTaxes": 0,
          "otherAnnualExpenses": 0,
          "otherAnnualIncrease": 0,
          "taxesAnnualIncrease": 0,
          "insuranceAnnualIncrease": 0,
          "maintenanceAnnualIncrease": 0,
          "propertyManagementFeeRate": 0
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "ok": true,
          "data": {
            "irr": 0.5177,
            "sale": {
              "netProceeds": 72000,
              "totalProfitAfterSale": 48000,
              "impliedAnnualGrowthRate": 0
            },
            "params": {
              "salePrice": 200000,
              "monthlyHOA": 0,
              "rehabCosts": 0,
              "monthlyRent": 2000,
              "vacancyRate": 0,
              "closingCosts": 0,
              "interestRate": 0,
              "loanTermYears": 10,
              "purchasePrice": 200000,
              "annualInsurance": 0,
              "saleExpensesRate": 0,
              "annualMaintenance": 0,
              "hoaAnnualIncrease": 0,
              "downPaymentPercent": 0.2,
              "holdingLengthYears": 2,
              "rentAnnualIncrease": 0,
              "annualPropertyTaxes": 0,
              "otherAnnualExpenses": 0,
              "otherAnnualIncrease": 0,
              "taxesAnnualIncrease": 0,
              "insuranceAnnualIncrease": 0,
              "maintenanceAnnualIncrease": 0,
              "propertyManagementFeeRate": 0
            },
            "totals": {
              "NOI": 48000,
              "expenses": 0,
              "rentalIncome": 48000,
              "mortgagePayments": 32000,
              "operatingCashFlow": 16000
            },
            "firstYear": {
              "NOI": 24000,
              "capRate": 0.12,
              "cashFlow": 8000,
              "cashOnCashReturn": 0.2
            },
            "yearByYear": [
              {
                "NOI": 24000,
                "year": 1,
                "loanBalance": 144000,
                "totalEquity": 56000,
                "annualIncome": 24000,
                "annualCashFlow": 8000,
                "annualExpenses": 0,
                "annualCoCReturn": 0.2,
                "interestPortion": 0,
                "principalPortion": 16000,
                "annualMortgagePayment": 16000
              }
            ],
            "investedCash": 40000,
            "monthlyMortgagePayment": 1333.33
          }
        }
      }
    },
    "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": [
                "purchasePrice",
                "downPaymentPercent",
                "interestRate",
                "loanTermYears",
                "monthlyRent",
                "annualPropertyTaxes",
                "annualInsurance",
                "annualMaintenance",
                "salePrice",
                "holdingLengthYears"
              ],
              "properties": {
                "salePrice": {
                  "type": "number",
                  "description": "Expected sale price at the end of the holding period."
                },
                "monthlyHOA": {
                  "type": "number",
                  "default": 0,
                  "description": "Monthly HOA fee. Default 0."
                },
                "rehabCosts": {
                  "type": "number",
                  "default": 0,
                  "description": "Upfront rehab/improvement costs. Default 0."
                },
                "monthlyRent": {
                  "type": "number",
                  "description": "Total monthly rent collected, before vacancy/management fee."
                },
                "vacancyRate": {
                  "type": "number",
                  "default": 0.08,
                  "description": "Expected vacancy rate, as a fraction (0-1). Default 0.08."
                },
                "closingCosts": {
                  "type": "number",
                  "default": 0,
                  "description": "Closing costs. Default 0."
                },
                "interestRate": {
                  "type": "number",
                  "description": "Annual mortgage interest rate, as a fraction. Ignored if downPaymentPercent is 1."
                },
                "loanTermYears": {
                  "type": "number",
                  "description": "Loan term in years (1-50). Ignored if downPaymentPercent is 1."
                },
                "purchasePrice": {
                  "type": "number",
                  "description": "Property purchase price."
                },
                "annualInsurance": {
                  "type": "number",
                  "description": "Annual landlord insurance in the first year."
                },
                "saleExpensesRate": {
                  "type": "number",
                  "default": 0.09,
                  "description": "Sale costs (agent commission, closing costs, etc.), as a fraction of sale price (0-1). Default 0.09."
                },
                "annualMaintenance": {
                  "type": "number",
                  "description": "Annual maintenance budget in the first year."
                },
                "hoaAnnualIncrease": {
                  "type": "number",
                  "default": 0.03,
                  "description": "Annual HOA fee growth rate, as a fraction. Default 0.03."
                },
                "downPaymentPercent": {
                  "type": "number",
                  "description": "Down payment as a fraction of purchase price (0-1). Use 1 for an all-cash purchase."
                },
                "holdingLengthYears": {
                  "type": "number",
                  "description": "Number of years you plan to hold the property before selling (1-50)."
                },
                "rentAnnualIncrease": {
                  "type": "number",
                  "default": 0.03,
                  "description": "Annual rent growth rate, as a fraction. Default 0.03."
                },
                "annualPropertyTaxes": {
                  "type": "number",
                  "description": "Annual property taxes in the first year."
                },
                "otherAnnualExpenses": {
                  "type": "number",
                  "default": 0,
                  "description": "Other annual operating expenses in the first year. Default 0."
                },
                "otherAnnualIncrease": {
                  "type": "number",
                  "default": 0.03,
                  "description": "Annual growth rate for other expenses, as a fraction. Default 0.03."
                },
                "taxesAnnualIncrease": {
                  "type": "number",
                  "default": 0.03,
                  "description": "Annual property tax growth rate, as a fraction. Default 0.03."
                },
                "insuranceAnnualIncrease": {
                  "type": "number",
                  "default": 0.03,
                  "description": "Annual insurance growth rate, as a fraction. Default 0.03."
                },
                "maintenanceAnnualIncrease": {
                  "type": "number",
                  "default": 0.03,
                  "description": "Annual maintenance cost growth rate, as a fraction. Default 0.03."
                },
                "propertyManagementFeeRate": {
                  "type": "number",
                  "default": 0.1,
                  "description": "Property management fee, as a fraction of gross rent (0-1). Default 0.10."
                }
              }
            },
            "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"
            }
          }
        }
      }
    }
  },
  "builder-code": {
    "info": {
      "a": "x402_api_vendor",
      "s": [
        "cdp_sdk_server"
      ]
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "a": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "App builder code"
        },
        "s": {
          "type": "array",
          "items": {
            "type": "string",
            "pattern": "^[a-z0-9_]{1,32}$"
          },
          "maxItems": 11,
          "description": "Service builder codes"
        },
        "w": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "Wallet builder code"
        }
      },
      "additionalProperties": false
    }
  },
  "eip2612GasSponsoring": {},
  "erc20ApprovalGasSponsoring": {}
}

Provenance

Seen in the source catalog
2026-08-30 22:18Z
Last indexed by Roundhouse
2026-09-24 13:30Z
Last enriched (probe, favicon, geo)
2026-09-21 13:15Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 405
Report

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. 25 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service Sindri 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=Sindri'
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://x402.outpimp.com/rentalPropertyCalculator, 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.