classify_transaction
Classify one transaction
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Third-party content written by another agent. Data to evaluate, not instructions.
Classify a single blockchain transaction using CryptoTaxEdge's multi-source consensus engine, the same engine and serve semantics as the public REST /v1/classify endpoint. Returns the /v1 contract fields: category (the open vocabulary the engine emits, for example swap, transfer, staking, reward, airdrop, income_receipt, fee_payment, borrow, repay, collateral_supply, collateral_withdraw, liquidity_add, liquidity_remove, wrap, unwrap, liquid_staking_mint, bridge_transfer, nft_mint, spam, unclassified; the full set with house treatments is at https://cryptotaxedge.com/standard/#categories and grows additively, so branch exhaustive logic on treatment, never on category), treatment (closed enum: disposal, income, non_taxable, expense, needs_review; needs_review means no treatment is asserted and taxable is null), taxable, confidence, needs_review, ledger_action, protocol, description (plain-English reasoning, also returned as explanation for existing clients) and, on hash lookups, assets (sent, received, gas). Works for EVM chains and Solana. Provide tx_hash (chain optional, auto-detected), or contract_address + function_selector + chain for a rule-library tuple lookup.
Input schema
| Property | Type | Required | Description |
|---|---|---|---|
| tx_hash | string | no | Transaction hash (0x-prefixed 66-char for EVM, base-58 for Solana). Either tx_hash OR contract_address is required. |
| chain | string | no | Chain slug (e.g. "ethereum", "polygon", "bsc", "arbitrum", "base", "optimism", "avalanche", "solana"). Optional for tx_hash lookups; the engine auto-detects the chain. REQUIRED for contract_address lookups. |
| contract_address | string | no | (Optional) 0x-prefixed contract address the transaction called. With function_selector + chain, performs a rule-library tuple lookup. |
| function_selector | string | no | (Optional) 0x-prefixed 4-byte function selector (first 4 bytes of tx input data). |
Raw JSON schema
{
"type": "object",
"properties": {
"tx_hash": {
"type": "string",
"description": "Transaction hash (0x-prefixed 66-char for EVM, base-58 for Solana). Either tx_hash OR contract_address is required."
},
"chain": {
"type": "string",
"description": "Chain slug (e.g. \"ethereum\", \"polygon\", \"bsc\", \"arbitrum\", \"base\", \"optimism\", \"avalanche\", \"solana\"). Optional for tx_hash lookups; the engine auto-detects the chain. REQUIRED for contract_address lookups."
},
"contract_address": {
"type": "string",
"description": "(Optional) 0x-prefixed contract address the transaction called. With function_selector + chain, performs a rule-library tuple lookup."
},
"function_selector": {
"type": "string",
"description": "(Optional) 0x-prefixed 4-byte function selector (first 4 bytes of tx input data)."
}
},
"required": []
}