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Saylor Innovations Data Desk – Crypto Capital Gains Calculator
x402
Saylor Innovations Data Desk – Crypto Capital Gains Calculator is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).
Calculates capital gains or losses from a crypto sale by lot using FIFO, LIFO, or HIFO, returning cost basis, proceeds, gain/loss, and short-term vs long-term classification per lot.
Price / call$0.01
Success—
StatusUnknown
How this service works
Capital gain from a crypto sale by lot using FIFO, LIFO or HIFO, with cost basis, proceeds and the short-term and long-term split per lot.
Output
Returns total capital gain or loss, total proceeds, the lot matching method used, and a per-lot breakdown including: quantity consumed, cost basis, proceeds attributed, gain/loss, holding days, and short-term or long-term classification. Also includes a plain-language note on how to interpret the result and a source attribution.
Example use cases
Year-end crypto tax reporting
“I need to figure out my capital gains for tax season. I sold 1.0 ETH on 2024-12-20 at $3,400. I have three purchase lots: 0.4 ETH on 2022-05-01 at $2,800 with a $5 fee, 0.3 ETH on 2023-09-15 at $1,600 with a $3 fee, and 0.3 ETH on 2024-06-01 at $3,100 with a $4 fee. Use FIFO and break down my short-term and long-term gains by lot.”
Tax-loss harvesting strategy comparison
“I'm considering selling 2 SOL on 2024-10-01 at $155 each. My lots are: 1 SOL bought 2024-01-10 at $95 with no fee, and 1 SOL bought 2024-08-05 at $170 with a $1 fee. Can you run the capital gains calculation using both FIFO and HIFO so I can see which method gives me a better tax outcome?”
Accountant crypto gain verification
“My client sold 0.25 BTC on 2024-04-15 at $64,000 per coin. Their purchase history is: 0.1 BTC on 2020-06-01 at $9,500 with a $10 fee, and 0.15 BTC on 2022-11-20 at $16,000 with a $15 fee. Please calculate the gains using LIFO, showing cost basis, proceeds, and whether each lot qualifies as short-term or long-term.”
Technical details
Endpoint
GEThttps://saylorinnovations.com/api/tax/crypto-gains?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a per-lot breakdown of crypto capital gains with FIFO, LIFO, or HIFO matching and explicit short-term vs long-term classification. It is ideal for tax preparation, accountant review, or harvesting strategy analysis where lot-level detail matters. Prefer this over generic financial calculation APIs when cryptocurrency tax lot accounting with IRS-style term classification is the specific requirement.
Side effects
- Missing required parameters (lots, sell_qty, sell_price, sell_date) returns an error
- Invalid date format (not YYYY-MM-DD) causes parsing failure
- Sell quantity exceeds total available lot quantity, resulting in an error or partial fill
- Malformed lots JSON array causes a parse error
- Unsupported method value (not fifo, lifo, or hifo) may default to FIFO or return an error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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