api.x402node.dev
Compute the 4-byte function/error selector and full keccak topic from a solidity signature, e.g. transfer(address,uint256). For decoding tx input prefixes and matching event topics. function selector, 4byte, method id, event topic, keccak signature Accepts payment on Base or Solana — either network works.
$0.01 USDC
api.x402node.dev
Fetch ENS profile text records for a name: avatar, url, twitter, github, email, description, plus the resolved address. ens records, ens profile, ens avatar, ens twitter lookup, ens text record, ethereum name service metadata Accepts payment on Base or Solana — either network works.
$0.006000 USDC
api.x402node.dev
Universal forex rate for ANY currency pair. Params: base, quote (e.g. USD, CNY), amount (optional, returns converted value). 任意货币对实时汇率与换算。任意通貨ペア為替レート。Tipo de cambio de cualquier par. 모든 통화쌍 환율. forex rate, exchange rate, currency convert. Accepts payment on Base or Solana — either network works.
$0.006000 USDC
api.x402node.dev
Check the exact ERC20 allowance an owner has granted to a spender contract, flagging unlimited approvals for revocation, on EVM chains. token allowance, approval check, unlimited approval, revoke allowance, spender allowance, wallet security Accepts payment on Base or Solana — either network works.
$0.005000 USDC
api.x402node.dev
Block info on five EVM chains, latest by default or by number: timestamp, transaction count, gas used, base fee and sample transaction hashes. latest block, block number lookup, block timestamp, chain head, block explorer data Accepts payment on Base or Solana — either network works.
$0.004000 USDC
api.x402node.dev
Lorem ipsum generator, placeholder text, dummy text, fake text generator, lorem text, filler content, sample text, lipsum, test content for design, mockup text. Generate Lorem ipsum placeholder with custom words, sentences, or paragraph count. Accepts payment on Base or Solana — either network works.
$0.002200 USDC
api.x402node.dev
Onchain ETH, BTC or LINK USD price straight from Chainlink mainnet oracles with round id, update time and the feed address for auditability. token price, eth price usd, btc price oracle, chainlink price feed, onchain price data Accepts payment on Base or Solana — either network works.
$0.004000 USDC
api.x402node.dev
Case converter, camelCase, snake_case, kebab-case, PascalCase, SCREAMING_SNAKE_CASE, CONSTANT_CASE, dot.case, title case, variable naming convention converter, case transform. Convert string between camelCase, snake_case, kebab-case, PascalCase, CONSTANT_CASE, dot.case, Title Case. Accepts payment on Base or Solana — either network works.
$0.002200 USDC
api.x402node.dev
Current air quality at a location by latitude and longitude or city: US AQI, PM2.5, PM10, ozone, nitrogen dioxide, carbon monoxide. Live environmental data. air quality, AQI, PM2.5 PM10, pollution, ozone by city Accepts payment on Base or Solana — either network works.
$0.005000 USDC
api.x402node.dev
Realized profit and loss and cost basis for an ERC20 token in a wallet on Base, computed from on-chain DEX trades against a quote asset (USDC by default). Returns average buy and sell price, realized PnL, remaining position and cost basis. Search terms: wallet PnL, realized gains, cost basis, token profit, crypto tax accounting, trade history. Accepts payment on Base or Solana — either network works.
$0.10 USDC
api.x402node.dev
Fetch the verified ABI of a smart contract with function and event signatures across multiple EVM chains - required for agents to correctly encode contract calls, which LLMs cannot retrieve live. contract abi, get abi, contract interface, function signatures, abi fetch, contract methods Accepts payment on Base or Solana — either network works.
$0.005000 USDC
x402.orthogonal.com
Search for people using Aviato DSL. Pass dsl object with filters, limit, and offset inside it.
$0.02 USDC
api.x402node.dev
Natural language date parser, parse date string, flexible datetime parser, today tomorrow yesterday, relative date keywords, +3 days, -1 week, ISO date parser. Parse natural language ('today', 'tomorrow', '+3d', '-1w') or any ISO/RFC date string into structured datetime. Accepts payment on Base or Solana — either network works.
$0.002200 USDC
api.x402node.dev
Live HKD to CNY exchange rate (Hong Kong Dollar / Chinese Yuan). Zero-param: GET returns current rate. 港币兑人民币实时汇率。香港ドル/人民元 為替レート。Tipo de cambio dólar de Hong Kong-yuan. 홍콩 달러 위안 환율. hkd cny, hkd-cny, HKD/CNY forex quote. Accepts payment on Base or Solana — either network works.
$0.004000 USDC
x402.orthogonal.com
Scrape a URL and return markdown, links, metadata, and tech stack. Falls back to Firecrawl if needed. 1 credit.
$0.03 USDC
api.strale.io
Look up Belgian company data from the KBO/BCE Crossroads Bank for Enterprises via the CBEAPI.be JSON wrapper. Accepts enterprise number (10 digits, e.g. 0404.616.494), VAT-prefixed form (BE0404170701), or fuzzy company name. Returns name, status, juridica…
$0.05 USDC
x402.orthogonal.com
Fetch funding signals with filtering by date, country, round type, amount, industry, and more. Pagination billing: call the first page normally and save billing.requestId from the Orthogonal /v1/run response. For later page, offset, or cursor calls on the same logical search, pass parentRequestId with unchanged non-pagination parameters. Valid continuation calls still get their own request IDs and quoted price, but are charged 0. Changing filters starts a new billable request.
$0.08 USDC
api.x402node.dev
Live SGD to USD exchange rate (Singapore Dollar / US Dollar). Zero-param: GET returns current rate. 新加坡元兑美元实时汇率。シンガポールドル/米ドル 為替レート。Tipo de cambio dólar de Singapur-dólar. 싱가포르 달러 달러 환율. sgd usd, sgd-usd, SGD/USD forex quote. Accepts payment on Base or Solana — either network works.
$0.004000 USDC
api.x402node.dev
Convert OP to USD at live price. Pass ?amount=1 for value in US Dollar. Optimism兑换美元换算。オプティミズムを米ドルに換算。Convertir Optimism a dólar. 옵티미즘를 달러로 환전. op to usd, Optimism convert. Accepts payment on Base or Solana — either network works.
$0.004000 USDC