/api/v1/protocols

Get Protocol Slippage Scores

• chain (query) — Chain scope: 'all' (blended cross-chain rollup, the default) or a single chain.
• limit (query, limit) — The maximum number of top protocols to return.
• offset (query, offset) — Pagination offset.

/api/v1/transactions

Recent Transactions Sample

• limit (query, limit) — The maximum number of recent transactions to return.
• offset (query, offset) — Pagination offset.
• chain (query) — Blockchain to query (ethereum, base, arbitrum, optimism)
• dex_project (query) — Filter by DEX project name.
• aggregator (query) — Filter by aggregator name.
• token_sold (query) — Filter by token sold symbol.
• token_bought (query) — Filter by token bought symbol.
• start_timestamp (query) — Filter by start timestamp (Unix).
• end_timestamp (query) — Filter by end timestamp (Unix).
• succeeded (query) — Filter by transaction success status.

/api/v1/contract/{address}/profile

Get Contract On-Chain Profile

• address (path, required)
• chain (query) — Blockchain network to query.

/api/v1/contract/{address}/attribution

Get Address Attribution Breakdown

• address (path, required)
• chain (query) — Filter to a single blockchain (ethereum, base, arbitrum, optimism).

/api/v1/tx/{tx_hash}

Per-Transaction Attribution

• tx_hash (path, required)
• chain (query) — Blockchain to query.
• deep (query) — Use internal call traces to refine the classification (catches aggregators that sit as intermediates, e.g. a router reached through a separate settlement contract, and runs the calldata-suffix test per sub-call). Costs more Alchemy CU; trace support is strongest on Ethereum.
• price (query) — Add a best-effort, APPROXIMATE USD trade size (dominant priced leg via the free DefiLlama spot-price API). Adds latency; never a settlement figure.

/api/v1/gas

Get Multi-Chain Gas Prices

/api/v1/labels

Auto-Discovered Contract Labels

• chain (query) — Filter by blockchain (ethereum, base, arbitrum, optimism).
• limit (query, limit) — Maximum number of labels to return.
• offset (query, offset) — Pagination offset.

/api/v1/attribution

Bulk Cross-Frontend Attribution

• chain (query) — Filter by blockchain (ethereum, base, arbitrum, optimism).
• project (query) — Filter by project or contract name (e.g., '1inch').
• limit (query, limit) — Maximum number of records to return.
• offset (query, offset) — Pagination offset.

/api/v1/mev/sandwiches

Detected Sandwich Attacks

• chain (query) — Filter by blockchain (ethereum, base, arbitrum, optimism).
• project (query) — Filter by DEX project name (e.g., 'uniswap').
• min_victim_volume_usd (query) — Only return events where the victim trade was at least this size (USD).
• limit (query, limit) — Maximum number of events to return.
• offset (query, offset) — Pagination offset.

/api/v1/revert-rates

Aggregator Revert Rates

• chain (query) — Filter by blockchain (ethereum, base, arbitrum, optimism).
• project (query) — Filter by aggregator/project name.
• revert_comparable (query) — Set true to return only venues whose revert rate may legitimately be ranked against each other — the `router` venues, where the user submits the swap so a failure is a reverted user transaction. Excludes batch-auction (CoW) and intent (1inch Fusion) venues, whose orders never reach the chain when they fail and whose on-chain revert rate is therefore structurally ~0.
• limit (query, limit) — Maximum number of rows to return.
• offset (query, offset) — Pagination offset.

/api/v1/flows

Interface Routing Flows

• source (query) — Filter by source interface (substring match).
• target (query) — Filter by target interface (substring match).
• limit (query, limit) — Maximum number of edges to return.
• offset (query, offset) — Pagination offset.

/api/v1/keys

How to get a free API key

/api/v1/keys

Get a free API key (higher rate limits)