68 Services from onchaincheck.dev

Returns a 0-100 risk score with reasons, on-chain metadata, ownership/proxy analysis, privileged function flags, and Uniswap v3 market data for any ERC-20 token on Arbitrum One.

Returns a comprehensive onchain profile for an Arbitrum One address, including wallet age, first funder, ETH balance, nonce, recent transfers (native/ERC-20/NFT), top counterparties, and large USD transfers.

Returns whale and large-trade data for an ERC-20 token on Arbitrum One, including individual trades, buy/sell volumes, net flow, and top buyer/seller wallets over a configurable time window.

Returns a 0-100 risk score with reasons, ownership/proxy/mint/pause/blacklist flags, and live DEX price, liquidity, and FDV for any ERC-20 token contract on Base.

Identifies what lives at a Base blockchain address: EOA wallet, smart contract type, token standard (ERC-20/721/1155), name, symbol, proxy info, bytecode size, nonce, and ETH balance.

Returns a comprehensive onchain profile for a Base network address including wallet age, first funder, contract type, ETH balance, recent transfers, top counterparties, and large USD transfers.

Returns a human-readable summary of a Base blockchain transaction including status, block info, sender/recipient, ETH value, gas fees, method selector, and decoded ERC-20 token transfers.

Returns all buys and sells for an ERC-20 token on Base over the last N minutes, including USD size, side, wallet, transaction hash, buy/sell volume, net flow, and top buying/selling wallets.

Returns a human-readable summary of an Ethereum transaction including status, block, sender/recipient, ETH value, gas details, method selector, and decoded ERC-20 token transfers with symbols and amounts.

Returns a 0-100 risk score with reasons, token metadata, ownership/proxy flags, privileged bytecode functions, and Uniswap v3 market data for any ERC-20 token on Ethereum.

Identifies whether an Ethereum address is a wallet or contract, detects token standards (ERC-20/721/1155), retrieves name/symbol/decimals, and surfaces proxy/upgrade details, bytecode size, nonce, and ETH balance.

Returns a comprehensive onchain profile for an Ethereum address: wallet age, first funder, EOA/contract type, ETH balance, recent transfers (native/ERC-20/NFT), top counterparties, and large USD transfers.

Returns a 0-100 risk score with reasons, token metadata, ownership status, privileged-function flags, and Uniswap v3/Velodrome market data for any ERC-20 token on OP Mainnet.

Returns a comprehensive onchain profile for an OP Mainnet address: wallet age, first funder, EOA vs contract, ETH balance, nonce, recent transfers, top counterparties, and large USD transfers.

Returns buy/sell trade history, volume summary, net flow, and top whale wallets for an ERC-20 token on OP Mainnet over a configurable time window, sourced from its deepest WETH/USDC pools on Uniswap v3 or Velodrome.

Returns buy/sell trades, volume summary, net flow, and top whale wallets for an ERC-20 token on Polygon PoS over the last N minutes, sourced from Uniswap v3 WPOL/USDC pools.

Identifies what lives at a Polygon PoS address: EOA vs contract, token standard (ERC-20/721/1155), name, symbol, proxy details, bytecode size, nonce, and POL balance.

Returns a 0-100 risk score with reasons, token metadata, ownership/proxy info, privileged function flags, and live Uniswap v3 price/liquidity for any ERC-20 token on Polygon PoS.

Returns a 0-100 risk score with reasons, token metadata, Token-2022 controls, holder concentration, and live market data (price, liquidity, volume) for any Solana SPL or Token-2022 token by mint address.

Returns a Solana wallet's full token portfolio (SOL + SPL + Token-2022 balances with USD values) and recent transaction activity summary including 24h transaction count and history depth flag.

Returns a 0-100 risk score with plain-language reasons, flags, and market data for any ERC-20 or SPL token on Base, Ethereum, Arbitrum, Optimism, Polygon, or Solana.

Screens a crypto wallet address for OFAC SDN sanctions, age, type, activity, and optionally token risk before sending or accepting payment

Screens a crypto wallet address for OFAC sanctions, wallet age, account type, first funder, and recent large transfers across EVM chains and Solana, returning ok/caution/block with plain-English reasons

Screens a crypto address against the US Treasury OFAC SDN list and identifies whether it is a wallet or contract on EVM chains or Solana

Returns current Arbitrum One gas metrics including block number, base fee, gas price, priority fee in gwei, and estimated ETH and USD costs for native and ERC-20 transfers.

Returns the ERC-20 allowance a spender has on an owner's tokens on Arbitrum One, including whether it's unlimited, the owner's balance, and the actual spendable amount right now.

Returns the native ETH balance and up to 20 ERC-20 token balances for a given Arbitrum One wallet address, with symbols and decimal-adjusted amounts.

Returns a human-readable summary of an Arbitrum One transaction including status, block, sender/recipient, ETH value, gas fee, method selector, and decoded ERC-20 token transfers.

Identifies the type and metadata of any Arbitrum One address: EOA wallet, ERC-20/721/1155 contract, proxy details, token name/symbol, bytecode size, nonce, and ETH balance.

Returns newly created Uniswap v3/v4 trading pools on Arbitrum One within a configurable look-back window, with token metadata, fee tiers, liquidity, and ETH/USDC pairing flags.

Fetches ERC-721/ERC-1155 token metadata on Arbitrum One including collection name, owner, token URI, traits, and a browser-loadable image URL resolved from IPFS, Arweave, HTTPS, or inline data URIs.

Returns the native ETH balance and up to 20 ERC-20 token balances for a given Base wallet address, formatted with symbols and decimals.

Resolves a Basename (e.g. jesse.base.eth) to its Base wallet address and on-chain profile records including avatar, description, URL, Twitter, and GitHub.

Returns real-time Base network gas metrics including block number, base fee, gas price, priority fee in gwei, and estimated ETH and USD costs for native and ERC-20 transfers.

Returns newly created trading pools on Base (Uniswap v3, v4, Aerodrome) from the last N minutes, with token metadata, fee tiers, hooks, and liquidity info.

Fetches on-chain and off-chain metadata for an ERC-721 or ERC-1155 token on Base, including collection name, owner, token URI, and decoded metadata JSON with a browser-loadable image URL.

Calculates a full Canadian sales tax breakdown (GST, HST, PST, RST, QST) for a given pre-tax CAD amount and province/territory, with rates and amounts current as of a specified date.

Calculates the number of business days between two dates for a specified Canadian province or territory, excluding weekends and provincial statutory holidays with observed-day adjustments, and lists all holidays skipped.

Converts an amount between two currencies using the European Central Bank daily reference rate, returning the rate, converted amount, and rate date.

Fetches on-chain and off-chain metadata for an ERC-721 or ERC-1155 NFT on Ethereum, including collection name, owner, token URI, decoded metadata JSON, and a browser-loadable image URL.

Returns the ERC-20 token allowance a spender has on Ethereum, including whether it's unlimited, the owner's balance, and the net spendable amount right now.

Returns the native ETH balance and balances of up to 20 specified ERC-20 tokens for an Ethereum wallet address, read live from the chain.

Returns current Ethereum network gas metrics including block number, base fee, gas price, priority fee in gwei, and estimated ETH and USD costs for native and ERC-20 transfers.

Returns the most recently created Uniswap v3 and v4 trading pools on Ethereum, including token metadata, fee tiers, hooks, ETH/USDC pairing, and quote liquidity.

Returns buy/sell trades, volume, net flow, and top whale wallets for an ERC-20 token on Ethereum Uniswap v3 WETH/USDC pools over a configurable look-back window.

Resolves an ENS name (e.g. vitalik.eth) to its Ethereum address and profile records, or reverse-resolves an Ethereum address to its primary ENS name and profile.

Returns the full onchain profile of any OP Mainnet address: EOA vs contract, token standard, name/symbol, proxy implementation, bytecode size, nonce, and ETH balance.

Returns a human-readable summary of an OP Mainnet transaction including status, block, sender/recipient, ETH value, gas, method selector, and decoded ERC-20 token transfers.

Fetches full metadata for an ERC-721 or ERC-1155 token on OP Mainnet, including collection name, owner, token URI, and decoded metadata with a browser-loadable image URL.

Returns the ERC-20 allowance on OP Mainnet: how much a spender may transfer from an owner, whether it is unlimited, the owner's current balance, and the immediately spendable amount.

Returns current OP Mainnet gas conditions including block number, base fee, gas price, priority fee in gwei, and estimated ETH and USD cost for native and ERC-20 transfers.

Returns the native ETH balance plus up to 20 ERC-20 token balances for a given OP Mainnet wallet address, with symbols and decimals formatted for readability.

Returns current Polygon PoS gas metrics (block number, base fee, gas price, priority fee in gwei) plus estimated POL and USD costs for native and ERC-20 transfers using Chainlink POL/USD pricing.

Returns the native POL balance and up to 20 ERC-20 token balances for a given Polygon PoS wallet address, with human-readable formatting using each token's symbol and decimals.

Returns the ERC-20 allowance a spender has on Polygon PoS, whether it is unlimited, the owner's current balance, and the net spendable amount right now.

Returns a human-readable summary of a Polygon PoS transaction including status, block, sender/recipient, POL value, gas details, method selector, and decoded ERC-20 token transfers.

Fetches metadata for an ERC-721 or ERC-1155 token on Polygon PoS, including collection name, current owner, token URI, decoded metadata JSON, and a browser-loadable image URL.

Returns a comprehensive onchain profile for a Polygon PoS address including wallet age, first funder, EOA/contract classification, POL balance, nonce, recent transfers, top counterparties, and large USD transfers.

Returns the ERC-20 token allowance a spender has from an owner on Base, including whether it's unlimited, the owner's balance, and the spendable amount right now.

Returns the list of statutory (general) holidays for a specified Canadian province or territory in a given year, with local names, actual dates, and observed dates when a holiday falls on a weekend.

Returns recently created trading pools on OP Mainnet (Uniswap v3, Uniswap v4, Velodrome) with token metadata, fee tiers, hooks, and liquidity info

Returns newly created DEX trading pools on Polygon PoS (Uniswap v3 and v4) within the last N minutes, including both token details, fee tiers, hooks, and quote liquidity.

Returns a rules-based risk verdict (CLEAN/MID/SKETCHY/RUGGY) for a token on Base, Ethereum, Arbitrum, Optimism, Polygon, or Solana, including a 0-100 risk score, reasons, deployer history, and a shareable card.

Fetches up to 50 open job listings from a company's public ATS job board (Greenhouse, Lever, Ashby, Workable, etc.) given a company name, website, or job-board URL, with optional filters for title, location, and remote.

Returns European Central Bank daily reference exchange rates for ~30 major currencies from any base currency, for the latest date or a specified past date.

Looks up a token deployer's full launch history and returns a rug-pull risk verdict (repeat-rugger, prior-rug, serial-launcher, clean-so-far, too-new) with per-token risk scores and liquidity survival data at 24h and 7d.

Batch-checks up to 5 tokens across Base, Ethereum, Arbitrum, Optimism, Polygon, or Solana for risk scores, price, liquidity, and delta alerts in a single call optimized for scheduled polling.

Minimal end-to-end x402 payment health check: pays $0.001 USDC and returns server time and payment network, confirming the full sign-and-settle flow works.