onchaincheck.dev
Identify what lives at a Base address: wallet (EOA, including EIP-7702 delegation) or contract, which token standard it implements (ERC-20, ERC-721, ERC-1155), name and symbol, upgradeable-proxy implementation and admin, smart-wallet proxies, bytecode size, nonce and ETH balance.
$0.005000 USDC
sweetai.tiamatcrypto.com
Call this for an actionable trading signal: ENTER_LONG/ENTER_SHORT/WAIT per asset with entry reference and exit plan from our live engines — bundle covers every supported asset in one call. Same handler and price as /api/v1/trading/decisions. No account, no API key
$0.01 USDC
onchaincheck.dev
Metadata for an ERC-721 or ERC-1155 token on Arbitrum One: collection name, current owner (ERC-721), token URI, and the metadata JSON fetched and decoded from IPFS, Arweave, HTTPS or an inline data URI, with a browser-loadable image URL.
$0.008000 USDC
social.duoleads.com
X User Tweets Timeline: the latest public tweets of one X (Twitter) account by handle or x.com URL, newest first. Per tweet the text, author handle and name, verification, followers, likes, replies, retweets, views, language, reply or quote parent, time and URL in the shared social schema; next_cursor gives the next page. Bad input is free; not found or no match is not charged.
$0.02 USDC
onchaincheck.dev
ERC-20 allowance on Base: how much a spender may transfer from an owner, whether the approval is effectively unlimited, the owner's balance, and the amount the spender could move right now.
$0.005000 USDC
onchaincheck.dev
Metadata for an ERC-721 or ERC-1155 token on Polygon PoS: collection name, current owner (ERC-721), token URI, and the metadata JSON fetched and decoded from IPFS, Arweave, HTTPS or an inline data URI, with a browser-loadable image URL.
$0.008000 USDC
onchaincheck.dev
Native ETH balance of a Arbitrum One wallet plus the balances of up to 20 ERC-20 tokens you list, formatted with each token's symbol and decimals, read live from Arbitrum One.
$0.005000 USDC
onchaincheck.dev
ERC-20 allowance on Arbitrum One: how much a spender may transfer from an owner, whether the approval is effectively unlimited, the owner's balance, and the amount the spender could move right now.
$0.005000 USDC
onchaincheck.dev
Metadata for an ERC-721 or ERC-1155 token on Ethereum: collection name, current owner (ERC-721), token URI, and the metadata JSON fetched and decoded from IPFS, Arweave, HTTPS or an inline data URI, with a browser-loadable image URL.
$0.008000 USDC
onchaincheck.dev
Metadata for an ERC-721 or ERC-1155 token on Base: collection name, current owner (ERC-721), token URI, and the metadata JSON fetched and decoded from IPFS, Arweave, HTTPS or an inline data URI, with a browser-loadable image URL.
$0.008000 USDC
onchaincheck.dev
Rug check and due-diligence snapshot of a Solana SPL or Token-2022 token: a 0-100 risk score with reasons, name, symbol, supply, mint and freeze authority, Token-2022 controls (permanent delegate, transfer fees, transfer hook, pausable), metadata mutability, top-holder concentration split into wallets and program accounts, and USD price, liquidity, volume and pools from Jupiter and DexScreener. Facts only, no buy or sell opinion.
$0.01 USDC
onchaincheck.dev
European Central Bank daily reference exchange rates for about 30 major currencies, from any base currency, latest or for a past date. Rates update once per working day; the response states which day.
$0.005000 USDC
tollbooth-hello-testnet.sjwilliams8.workers.dev
Test endpoint for verifying x402 payment integration end to end. Returns a static greeting in the Agent Tollbooth standard response envelope. Not a data product — use it to smoke-test your x402 client for $0.001 before calling our compliance endpoints.
$0.001000 USDC
onchaincheck.dev
Convert an amount between two currencies at the European Central Bank daily reference rate, latest or for a past date, returning the rate used, the result, and the rate date.
$0.005000 USDC
onchaincheck.dev
Identify what lives at a Ethereum address: wallet (EOA, including EIP-7702 delegation) or contract, which token standard it implements (ERC-20, ERC-721, ERC-1155), name and symbol, upgradeable-proxy implementation and admin, smart-wallet proxies, bytecode size, nonce and ETH balance.
$0.005000 USDC
onchaincheck.dev
ERC-20 allowance on Polygon PoS: how much a spender may transfer from an owner, whether the approval is effectively unlimited, the owner's balance, and the amount the spender could move right now.
$0.005000 USDC
onchaincheck.dev
Human-readable summary of a OP Mainnet transaction: status, block and time, sender and recipient, ETH value, gas used and fee, method selector, and decoded ERC-20 transfers with token symbols and amounts.
$0.005000 USDC
onchaincheck.dev
Human-readable summary of a Ethereum transaction: status, block and time, sender and recipient, ETH value, gas used and fee, method selector, and decoded ERC-20 transfers with token symbols and amounts.
$0.005000 USDC
onchaincheck.dev
ERC-20 allowance on Ethereum: how much a spender may transfer from an owner, whether the approval is effectively unlimited, the owner's balance, and the amount the spender could move right now.
$0.005000 USDC