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Vextorium — The x402 Payment Engine
1,024 resources on api.vextorium.com · browse everything
Pay-per-call data APIs for AI agents: on-chain data (Base, Ethereum, Solana payments), DeFi, FX and AI text tools. USDC via x402. the operator’s own description
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- Vextorium
500 pay-per-call data tools: on-chain (30+ chains), DeFi, markets, stats, compliance. Pay via x402.
- Vextorium
EU VAT number format validation for all member states (plus Spanish check digit). Does not query VIES.
- Vextorium
One address across five EVM chains (Base, Ethereum, Arbitrum, Optimism, Polygon): native coin and USDC balance per chain and total USD value.
- Vextorium
Website security headers audit: HTTPS, HSTS, CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy and cookie flags, with a score.
- Vextorium
Email validation: syntax, domain MX records and disposable-domain flag. Sends no email; the address is not stored.
- Vextorium
Impermanent loss calculator for Uniswap v2 (full range) and v3/v4 concentrated ranges: IL vs holding, out-of-range flag and final token mix.
- Vextorium
Historical ECB euro reference exchange rate for any date since 1999 and conversion between any two published currencies.
- Vextorium
Crypto price in any ECB currency (EUR, GBP, JPY, CHF...): on-chain USD price (Chainlink or Uniswap v3) converted with ECB reference rates.
- Vextorium
EVM developer utilities: keccak256 hash, function selector from a signature, EIP-55 checksum address and wei/gwei/ether conversion.
- Vextorium
Uniswap v3 pool state on Base for a token pair: pool address per fee tier, spot price, tick, active liquidity and token reserves.
- Vextorium
Aave v3 live lending and borrowing APY for the main assets (WETH, USDC, USDT, DAI, cbBTC/WBTC) on a chain.
- Vextorium
Aave v3 position health for a wallet on five chains: collateral, debt, borrowing power, LTV, liquidation threshold and health factor with a risk label.
- Vextorium
ENS profile: resolved address plus public text records (avatar, description, url, twitter, github, telegram, discord, email).
- Vextorium
Latest block on an EVM chain: number, hash, time, age in seconds, transaction count, gas used % and base fee.
- Vextorium
Address inspector for EVM chains: wallet (EOA), EIP-7702 delegated wallet or contract; bytecode size, ERC-20/721/1155 support, proxy implementation and beacon,
- Vextorium
NFT lookup (ERC-721 / ERC-1155): collection name, owner, token URI and metadata (name, description, image, attributes).
- Vextorium
ERC-20 allowance lookup: how much a spender can move from an owner's balance, flagging unlimited approvals.
- Vextorium
ERC-20 admin-control check: detects owner privileges, upgradeable proxy, mint, pause, blacklist and fee-setting functions in the contract code. Measures issuer
- Vextorium
Recent activity of a Solana address: latest transaction signatures with slot, time, success or failure and memo (up to 25).
- Vextorium
Solana account inspector: whether it exists, type (wallet, token account, mint, program, program data), SOL balance, owner program and data size.
- Vextorium
Solana priority fee estimator: recent per-slot priority fees (min, median, p75, p90, max micro-lamports per CU) and total cost in SOL for a 200k-CU transaction.
- Vextorium
Solana SPL token profile and risk signals: supply, decimals, mint and freeze authorities (can the issuer mint more or freeze accounts?) and Token-2022 extension
- Vextorium
Solana transaction status by signature: confirmed / failed / processing, slot, time, fee in SOL, signers, programs invoked and token balance changes.
- Vextorium
Solana wallet balances: SOL plus every SPL and Token-2022 token held (mint, amount, decimals), with USD value for USDC/USDT.
- Vextorium
IBAN validation (ISO 13616 mod-97 and per-country length, SEPA membership; for Spain also the national CCC check digits and bank name). Computed locally, IBAN i
- Vextorium
Domain intelligence: WHOIS (registrar, creation and expiry dates), DNS records and SSL certificate details.
- Vextorium
CSV cleaning and normalization to JSON: column names, types, duplicates and empty values. Data is processed in memory and not stored.
- Vextorium
Crypto price in USD and EUR from on-chain sources only: Chainlink oracles (BTC, ETH, USDC) or Uniswap v3 quotes on Base (USDT, DAI or any Base token address); E
- Vextorium
DeFi liquidations read on-chain from Aave v3 on Base, Ethereum, Arbitrum, Optimism and Polygon: total USD liquidated, event count, breakdown by network, collate
- Vextorium
On-chain swap quote on Base from Uniswap v3 QuoterV2 across all fee tiers (0.01%, 0.05%, 0.3%, 1%): output amount, unit price, best pool and gas estimate. Accep