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Base Wallet FIFO Realized Gains & Tax Lot Estimator
x402
Base Wallet FIFO Realized Gains & Tax Lot Estimator is a paid API for AI agents from x402-services-production.up.railway.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Calculates FIFO-based realized gains and losses in USD for a Base wallet's ERC-20 trade history, returning per-token and total profit/loss estimates priced at historical closes.
Price / call$0.05
Success—
StatusUnknown
How this service works
FIFO realized-gains estimate for a wallet: per-token and total realized profit/loss in USD from its Base ERC-20 trade history, priced at historical closes. Send { address }. Fast cost-basis/tax estimate (not filing-grade — see notes).
Output
Returns a breakdown of realized gains and losses per ERC-20 token traded from the given Base wallet, calculated using FIFO cost-basis methodology and historical close prices, plus a total realized P&L figure in USD. Intended as a fast tax estimate, not filing-grade output.
Example use cases
Example prompt
“Can you estimate the realized gains and losses on my Base wallet 0x4f3B...aD92 — I want to see per-token FIFO profit/loss in USD based on historical prices?”
Technical details
Endpoint
POSThttps://x402-services-production.up.railway.app/api/portfolio/taxlotsWhen to prefer
Use this endpoint when you need a quick FIFO realized-gains estimate for a Base wallet's ERC-20 trading history, especially for tax estimation or portfolio review purposes. Prefer this over on-chain raw data endpoints when you need pre-computed USD P&L rather than raw transaction logs. Not suitable for tax filing — use only for fast estimates.
Side effects
- Invalid or non-Base wallet address returns an error or empty result
- Wallet with no trade history returns zero gains/losses
- Historical price data unavailable for obscure tokens may result in incomplete P&L
- Rate limiting or payment failure (x402) blocks the request
- Very large trade histories may timeout or return partial results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| addressrequired | string | 0x wallet address (Base) |
Tags
x402
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