Saylor Innovations Dev Tools
Compound interest calculator - final balance, interest earned and year-by-year growth for a principal, rate, years and optional monthly contribution
Offering
- Provider
- saylorinnovations.com
- Method
- GET
- Offering type
- Api Endpoint
- Transport type
- http
- Category
- Financial Analysis
- Delivery
- Not provided
- Pricing model
- Not provided
- x402 version
- 2
Endpoint context
- URL
https://saylorinnovations.com/api/calc/compound- MIME type
- Not provided
- First seen
- 2026-10-16T01:51:51.176Z
- Last seen
- Tags
- calc, compound, calculator
Payment pricing
x402 payment terms are the authoritative price for calling this endpoint.
- Payment option 1
- 0.01 USDC
Atomic price: 10000 · Network: eip155:8453 · Asset: USDC · Scheme: exact - Payment option 2
- 0.01 USDC
Atomic price: 10000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact
Raw x402 terms
[
{
"scheme": "exact",
"network": "eip155:8453",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "10000",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa"
},
{
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"amount": "10000",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7"
}
]Observed health
- Status
- Healthy
- Latest latency
- 134 ms
- Average latency
- 184 ms
- HTTP status
- 402
- Last checked
- Reachability
- 100% over 4 checks
Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.
Input schema
{
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"POST",
"PUT",
"PATCH",
"DELETE",
"HEAD"
],
"type": "string"
},
"queryParams": {
"properties": {
"monthly_contribution": {
"description": "optional, default 0",
"type": "string"
},
"principal": {
"description": "Starting amount",
"type": "string"
},
"rate": {
"description": "Annual interest rate in percent",
"type": "string"
},
"years": {
"description": "Years to grow",
"type": "string"
}
},
"required": [
"principal",
"rate",
"years"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
}Output schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"POST",
"PUT",
"PATCH",
"DELETE",
"HEAD"
],
"type": "string"
},
"queryParams": {
"properties": {
"monthly_contribution": {
"description": "optional, default 0",
"type": "string"
},
"principal": {
"description": "Starting amount",
"type": "string"
},
"rate": {
"description": "Annual interest rate in percent",
"type": "string"
},
"years": {
"description": "Years to grow",
"type": "string"
}
},
"required": [
"principal",
"rate",
"years"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"annual_rate_percent": {
"description": "Annual rate as a percentage",
"type": [
"number",
"null"
]
},
"checked_at": {
"description": "Time the check was run (UTC)",
"type": [
"string",
"null"
]
},
"compounds_per_year": {
"description": "Compounds per year",
"type": [
"number",
"null"
]
},
"effective_annual_rate_percent": {
"description": "Effective annual rate, as a percentage",
"type": "number"
},
"final_balance": {
"description": "Balance at the end of the period",
"type": "number"
},
"interest_earned": {
"description": "Total interest earned",
"type": "number"
},
"method": {
"description": "Method used",
"type": [
"string",
"null"
]
},
"monthly_contribution": {
"description": "Monthly contribution",
"type": [
"number",
"null"
]
},
"principal": {
"description": "Starting principal amount",
"type": [
"number",
"null"
]
},
"total_contributions": {
"description": "Total contributions",
"type": "number"
},
"yearly": {
"description": "Yearly values",
"items": {
"properties": {
"balance": {
"description": "Balance in whole units",
"type": "number"
},
"contributions": {
"type": "number"
},
"interest": {
"type": "number"
},
"year": {
"description": "Calendar year",
"type": "number"
}
},
"type": "object"
},
"type": "array"
},
"years": {
"description": "Years covered",
"type": [
"number",
"null"
]
}
},
"required": [
"final_balance",
"total_contributions",
"interest_earned"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}