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MCP server for Canadian adjusted cost base (ACB) and capital gains: average-cost tracking, per-disposition gains, and superficial-loss detection for LLM agents.
Show current holdings: shares, total ACB and ACB per share for each security. A lighter view than calculate_acb when you only want the current book cost of what is still held (for example to compute an unrealized gain against a market price). Accepts inline 'transactions' or a 'csv_path'. Each transaction is an object: date (YYYY-MM-DD), action ('buy' or 'sell'), security (ticker/symbol), shares, price (per share), and optionally commission, currency, fx_rate (trade-currency to CAD, e.g. 1.35 for USD), and note.
Compute adjusted cost base and capital gains for a set of trades (Canadian rules). Runs the full calculation and returns: current holdings (shares, total ACB, ACB per share) per security; every disposition with proceeds, ACB, outlays, the gain before and after the superficial-loss rule, and whether it was a superficial loss; per-tax-year summaries with net and taxable capital gain; and any warnings. Uses the CRA average-cost method (all shares of a security pool into one ACB; gains are computed against the average, not FIFO). Pass trades either inline as 'transactions' or as a file path in 'csv_path' (CSV or JSON). Each transaction is an object: date (YYYY-MM-DD), action ('buy' or 'sell'), security (ticker/symbol), shares, price (per share), and optionally commission, currency, fx_rate (trade-currency to CAD, e.g. 1.35 for USD), and note. This is a calculation aid, not tax advice; verify results before filing.
Produce a capital-gains report for a single tax year (Schedule 3 style). Returns every disposition dated in 'tax_year' with proceeds, ACB, outlays and the allowable capital gain/loss, plus totals: total proceeds, total ACB, net capital gain, and the taxable capital gain (net gain times the 50% inclusion rate). Superficial losses are already applied. Accepts inline 'transactions' or a 'csv_path'. Each transaction is an object: date (YYYY-MM-DD), action ('buy' or 'sell'), security (ticker/symbol), shares, price (per share), and optionally commission, currency, fx_rate (trade-currency to CAD, e.g. 1.35 for USD), and note. This is a calculation aid, not tax advice; verify results before filing.
| Scored | Grade | Overall | Spec posture | Rubric |
|---|---|---|---|---|
| 2026-09-23 | F | 11 | 2026-07-28+ | v2 |
Flag superficial losses under the CRA 30-day (61-day window) rule. Scans dispositions for losses where the same security was bought within 30 days before or after the sale and still held at the end of that window. For each, reports the security, date, the denied (deferred) loss amount and the allowable portion. The denied amount is added to the ACB of the substitute shares. Accepts inline 'transactions' or a 'csv_path'. Each transaction is an object: date (YYYY-MM-DD), action ('buy' or 'sell'), security (ticker/symbol), shares, price (per share), and optionally commission, currency, fx_rate (trade-currency to CAD, e.g. 1.35 for USD), and note.
Convert a raw broker activity export into transactions the other tools accept. Broker exports rarely match the documented headers. This tool maps common column aliases ("Trade Date", "Activity Type", "Symbol", "Quantity", ...), keeps only buy/sell rows (reinvestment/DRIP rows count as buys, since they add to ACB), cleans number formats ("1,200", "$9.99", parenthesized negatives, signed quantities), and returns ready-to-use 'transactions' plus a per-row 'skipped' list (dividends, deposits, transfers, unparseable rows) with reasons, so nothing is dropped silently. Pass the export as 'csv_path' (CSV/TSV/JSON) or inline as 'rows'. Feed the returned transactions straight into calculate_acb, capital_gains_report or unrealized_gains.
One row per security in the shape of Schedule 3's publicly traded shares section. Aggregates dispositions (optionally limited to 'tax_year') into one line per security with the columns transcribed onto Schedule 3: number of shares, proceeds of disposition (gross, before commissions), adjusted cost base, outlays and expenses (sale commissions), and gain or loss with the superficial-loss rule already applied, plus acquisition years, per-column totals, and the list of years that have dispositions. capital_gains_report lists every individual disposition; use this tool when the user wants the aggregated filing lines instead. Accepts inline 'transactions' or a 'csv_path'. Each transaction is an object: date (YYYY-MM-DD), action ('buy' or 'sell'), security (ticker/symbol), shares, price (per share), and optionally commission, currency, fx_rate (trade-currency to CAD, e.g. 1.35 for USD), and note. This is a calculation aid, not tax advice; verify results before filing.
Compute unrealized gains: current holdings' book cost (ACB) against market prices. For each security still held, returns shares, total ACB, current market value and the unrealized gain in dollars and percent, plus portfolio totals. 'market_prices' maps each security to its current price: either a number already in CAD (e.g. {"XEQT": 35.20}) or, for foreign-quoted securities, an object with the trade-currency price and the CAD exchange rate (e.g. {"VTI": {"price": 305.40, "fx_rate": 1.37}}). Held securities without a price are listed in 'missing_prices' and excluded from totals. Accepts inline 'transactions' or a 'csv_path'. Each transaction is an object: date (YYYY-MM-DD), action ('buy' or 'sell'), security (ticker/symbol), shares, price (per share), and optionally commission, currency, fx_rate (trade-currency to CAD, e.g. 1.35 for USD), and note.