Moltline TaxLots MCP server

• build_lotsFree

  Build the lot inventory per account and every disposal with basis, gain and holding period. PREMIUM (license). Methods: fifo (the default rule when no specific identification is made, Treas. Reg. 1.1012-1(j)), lifo, hifo, or specific_id via a row's specific_lots {lot_id: qty}. Typical input {"ledger": <rows>, "method": "hifo", "transfers": <pairs from match_transfers>} returns {"disposals": [{"row": "cb9", "asset": "BTC", "qty": "0.5", "proceeds": "31000.00", "basis": "20000.00", "gain": "11000.00", "term": "long", ...}], "open_lots": [...], "summary": {"short_term": {...}, "long_term": {...}}}. Fees: a cash purchase's fee joins basis; a sale's or exchange's fee reduces the amount realized (1.1001-7); a network fee paid in the transferred asset is a disposal of those units (transfer_fee_policy dispose) unless you choose ignore. Transfers between your own accounts move lots with their basis and acquisition date. Use once ledger_lint reports no errors. Not tax advice: it applies the stated rules to your rows and shows its work. Errors: on invalid, missing, or malformed input this tool never raises a protocol error — it returns {"error": "<what is wrong and how to fix it>"} (for example {"error": "method must be fifo, lifo, hifo or specific_id"}). Every call is read-only and idempotent, so after correcting the input it is always safe to retry.

• form_8949_rowsFree

  Lay the disposals out as Form 8949 rows with box categories and totals. PREMIUM (license). Typical input {"disposals": <from build_lots>, "tax_year": 2026, "default_reporting": "proceeds_only"} returns {"part_i": {"B": [rows]}, "part_ii": {"E": [rows]}, "totals": {...}}. Columns follow the form: description (a), date acquired (b), date sold (c), proceeds (d), cost or other basis (e), code (f), adjustment (g), gain or loss (h). Box: A/D when the broker reported proceeds and basis, B/E when proceeds only, C/F when no broker form - set per row in reporting {row_id: value} or for all rows with default_reporting. Use to draft the schedule from computed disposals. Not a filing: check the current form instructions. Errors: on invalid, missing, or malformed input this tool never raises a protocol error — it returns {"error": "<what is wrong and how to fix it>"} (for example {"error": "disposals must be a non-empty list from build_lots"}). Every call is read-only and idempotent, so after correcting the input it is always safe to retry.

• ledger_lintFree

  Find the problems that break a lot build: missing values, duplicates, negative balances. FREE. Typical input {"ledger": <rows from parse_transactions>} returns {"issues": [{"severity": "error", "row": "cb12", "issue": "sell of 0.5 BTC exceeds balance 0.2 in account coinbase"}], "balances": {"coinbase": {"BTC": "0.2"}}, "counts": {...}}. Balances are running quantities per account and asset in time order, ignoring transfers' fiat values. Use after parse_transactions and before build_lots. Not a tax check: it checks the ledger's arithmetic consistency only. Errors: on invalid, missing, or malformed input this tool never raises a protocol error — it returns {"error": "<what is wrong and how to fix it>"}. Every call is read-only and idempotent, so after correcting the input it is always safe to retry.

• lp_position_mathFree

  Impermanent loss, hold-vs-pool value and basis split for a two-asset constant-product pool. FREE. Typical input {"deposit": {"asset_a": "ETH", "qty_a": "1", "price_a": "2000", "asset_b": "USDC", "qty_b": "2000", "price_b": "1"}, "current_prices": {"ETH": "3000", "USDC": "1"}} returns {"il_pct": "-2.02", "hold_value": "5000.00", "pool_value": "4898.98", "deposit_value": "4000.00", "basis_split": {...}}. The pool value assumes x*y=k with no fees; add fees_earned_fiat to see the net. The basis split is the deposit's fiat value at deposit, allocated by each side's share, which is the arithmetic a lot engine needs if the LP position is treated as one asset. Use for DeFi position reviews. Not a determination of whether the deposit is a taxable exchange. Errors: on invalid, missing, or malformed input this tool never raises a protocol error — it returns {"error": "<what is wrong and how to fix it>"} (for example {"error": "deposit and current_prices must be objects"}). Every call is read-only and idempotent, so after correcting the input it is always safe to retry.

• match_transfersFree

  Pair withdrawals with the deposits that received them between your own accounts. FREE. Typical input {"ledger": <rows>, "window_minutes": 1440} returns {"pairs": [{"out": "kr91", "in": "cb14", "asset": "BTC", "from": "kraken", "to": "coinbase", "network_fee": "0.0001", "minutes": 42.0}], "unmatched": {"transfer_out": [...], "transfer_in": [...]}}. A pair needs the same asset, a different account, the deposit inside the window after the withdrawal, and a quantity within tolerance_pct of the amount sent net of the fee. Use before build_lots so basis and holding period move with the coins instead of being treated as a sale. Not for transfers to third parties: those stay unmatched and should be typed gift_out or sell. Errors: on invalid, missing, or malformed input this tool never raises a protocol error — it returns {"error": "<what is wrong and how to fix it>"}. Every call is read-only and idempotent, so after correcting the input it is always safe to retry.

• parse_transactionsFree

  Normalise an exchange CSV export into the canonical ledger rows. FREE. Supports the Coinbase transaction-history export (Transaction Type / Asset / Quantity Transacted columns), the Kraken ledgers export (txid / refid / type / asset / amount / fee) and a generic CSV with the canonical columns ts, type, asset, qty, fiat_value, fee_qty, fee_asset, fee_fiat, counter_asset, counter_qty, account, id. Typical input {"csv_text": "...", "source_hint": "coinbase"} returns {"rows": [...], "detected": "coinbase", "unrecognised": [...], "warnings": [...]}. Rows it cannot read are returned under unrecognised with the reason, never dropped silently. In every row qty is the whole amount that entered or left the account; when a fee was paid in the same asset, fee_qty is the part of qty that was the fee. Use before ledger_lint and build_lots. Not for other exchanges: convert those to the generic columns first. Errors: on invalid, missing, or malformed input this tool never raises a protocol error — it returns {"error": "<what is wrong and how to fix it>"} (for example {"error": "csv_text must be the CSV file contents"}). Every call is read-only and idempotent, so after correcting the input it is always safe to retry.

• reconcile_1099daFree

  Diff the broker's 1099-DA lines against the computed disposals. PREMIUM (license). Typical input {"disposals": <from build_lots>, "form_rows": [{"asset": "BTC", "date_sold": "2026-03-04", "qty": "0.5", "proceeds": "31000", "basis": "", "account": "coinbase"}]} returns {"matched": [...], "broker_missing_basis": [...], "basis_mismatch": [...], "proceeds_mismatch": [...], "unmatched_form_rows": [...], "unmatched_disposals": [...]}. A line matches a disposal on the same account (when given), asset and sale date with quantity and proceeds inside the tolerances; several lots sold in one order are summed first. Use when the form arrives and the basis column is blank for coins that came from your own wallet. Not a substitute for the broker's statement. Errors: on invalid, missing, or malformed input this tool never raises a protocol error — it returns {"error": "<what is wrong and how to fix it>"} (for example {"error": "disposals must be a non-empty list from build_lots"}). Every call is read-only and idempotent, so after correcting the input it is always safe to retry.

• wash_window_checkFree

  Flag loss disposals with a repurchase of the same asset inside the window. FREE. Typical input {"disposals": <from build_lots>, "acquisitions": [{"asset": "ETH", "ts": "2026-02-10T10:00:00Z", "qty": "2"}]} returns {"flags": [{"row": "cb7", "asset": "ETH", "loss": "-410.00", "repurchases": [...]}], "rule_status": "..."}. The 30-day window before and after the sale is the one IRC 1091 uses for stock or securities; as checked on the verification date that statute had not been extended to digital assets that are not securities, so the output is a heads-up for planning, not an adjustment. Use when reviewing loss harvesting. Not a determination that any rule applies. Errors: on invalid, missing, or malformed input this tool never raises a protocol error — it returns {"error": "<what is wrong and how to fix it>"} (for example {"error": "disposals and acquisitions must be lists"}). Every call is read-only and idempotent, so after correcting the input it is always safe to retry.

• –Code scanremote-only server, no package to scann/a
• Live reliabilityremote reachable in 337ms20/20
• Tool poisoning8 tool descriptions checked15/15
• Auth qualityopen endpoint, read-only tools10/15
• Maintenancelast push 0 days ago15/15
• Maintainer identitynamespace and repository owner differ; website matches verified namespace5/10

Moltline TaxLots: common questions

Is Moltline TaxLots MCP server safe?

Yes, by our scan: it is graded A (87/100). Read the Moltline TaxLots safety report

How do I install Moltline TaxLots?

It runs remotely at mcp.moltlinestudio.com. Add it to Claude Code, Claude Desktop or Cursor with the snippets above, or call it through the mcp.market gateway without installing anything.

Does Moltline TaxLots need an API key?

Not as far as the registry entry and our scan can tell: no credentials are declared or required.

Is Moltline TaxLots maintained?

The last commit was in the last day (2026-09-19). The latest release is v1.2.0.

Is Moltline TaxLots up?

100% of our last 3 checks got an answer. We check remote servers about four times a day.

What can I use instead of Moltline TaxLots?

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