Crypto & Blockchain

Top prediction market events: Polymarket events (groups of related markets) ranked by trading volume, with title, slug, end date and market count. Use it to see what the biggest prediction markets are right now. Input: optional limit.

Stock price / live stock quote for any US ticker: last price, change, day range, volume and market state, plus daily OHLCV history (1d to 5y), read at call time from Nasdaq's public data with Yahoo Finance as fallback. Every answer names its source, the source's timestamp, its delay in minutes and when it was read. Input: symbol (AAPL, NVDA...); optional range, include_history.

Base RPC endpoint, pay per call: any allowlisted read-only JSON-RPC method on Base mainnet (eth_call, eth_getBalance, eth_getLogs, eth_getBlockByNumber, eth_getTransactionReceipt and more) with your own params, no API key. Revert reasons come back as the result. Input: method; optional params.

Base wallet lookup / address balance: ETH balance, transaction count (nonce) and whether the address is a smart contract or an ordinary wallet (EOA), live from Base mainnet in one call. Use it to check a counterparty, deposit address or contract before paying it. Input: address (0x...). For token balances or any other read use chain.rpc.

Base transaction lookup by hash: sender, recipient, ETH value, block, success or failure, gas used and log count, with the receipt folded in, live from Base mainnet. Use it to confirm a payment or transfer landed on-chain. Input: hash (the 0x transaction hash). For the raw receipt use chain.rpc.

Latest Base block: number, timestamp and hash. The cheapest call on the service — useful as a liveness and connectivity check.

Counterparty due diligence in one call: validates the EU VAT ID against the live VIES register, screens the company or person against the official EU consolidated sanctions list, checks the IBAN, and returns a traffic-light verdict (clear / review / blocked) with reasons and a recommendation. Built for onboarding a new supplier, customer or payee automatically. Every finding cites its official source and data date.

Recent material public-source changes for tracked Bitcoin services.

Latest European Central Bank reference exchange rates, normalized JSON. Query: ?base=EUR&symbols=USD,GBP,JPY (symbols optional -> all). Rates update once per working day; served with a 1h cache.

Exchange rates / currency conversion table: Coinbase's full rate table for one base currency against every crypto and fiat currency it quotes (USD to BTC, ETH, EUR, GBP, JPY...). Use it to convert amounts between currencies. Input: currency code such as USD.

Crypto ticker / bid and ask: live best bid, best ask, last price and volume for one Coinbase product from Coinbase's Exchange data host, an independent second source to market.quote. Input: product_id such as BTC-USD.

Base network status and gas price: current block height and gas price (wei and gwei), live from a Base mainnet RPC node. Use it to check Base is moving, time an on-chain action or estimate gas before sending a transaction. Keyless, pay per call. No input needed.

Competitive and market intelligence: live web research on a company, product or protocol, returned with the sources it read.

Crypto Fear & Greed Index: current reading (0-100, Extreme Fear to Extreme Greed) plus 7-day and 30-day sentiment trend (rising/falling/flat with the average and point change), not just a single snapshot number. Not ticker-specific. Data from alternative.me. $0.01/call.

Top DeFi protocols by DEX trading volume, live from DeFiLlama: 24h/7d volume with % change, across ~1,300 tracked protocols. Optionally filter to one chain. Not ticker-specific. Supports optional limit (default 10, max 25). $0.01/call.

One-call US stock ticker brief for trading agents (Coinbase for Agents / x402 market data): X/Twitter activity (24h), prediction markets, SEC Form 4 insider activity (90d), and the latest 8-K filing - bundled from /x/ticker-pulse, /pm/ticker-events and /sec/insider. Each section fails independently so a partial answer beats none. Facts only - never a buy/sell/hold signal or price target. ?ticker=NVDA.

One-call US stock ticker brief for trading agents (Coinbase for Agents / x402 market data): X/Twitter activity (24h), prediction markets, SEC Form 4 insider activity (90d), and the latest 8-K filing - bundled from /x/ticker-pulse, /pm/ticker-events and /sec/insider. Each section fails independently so a partial answer beats none. Facts only - never a buy/sell/hold signal or price target. ?ticker=NVDA.

Current token prices for up to 10 tokens per call, on any chain: address as <chain>:<address> (base:0x…, ethereum:0x…) or coingecko:<id> for majors. Aggregated market price with a confidence score and timestamp, from DefiLlama's open price engine. $0.002 — priced for agents that check before every trade.

Crypto market sentiment in one call: the Fear & Greed index (0-100 with classification) plus global market stats — total market cap, 24h volume, BTC/ETH dominance and 24h change. Free public data, $0.002.

Stablecoin market data with the number agents paying in USDC actually need: current price and PEG DEVIATION per coin, circulating supply, peg mechanism and chains, ranked by market cap. Filter by symbol or screen for depegs (absolute deviation above a threshold). Open DefiLlama data, refreshed every 10 minutes.

Analyze any text in one call: detected language (with script + confidence), readability (Flesch Reading Ease & Flesch-Kincaid grade with reading level) and full statistics — word/sentence/paragraph counts, reading time, lexical diversity. Offline, key-less, $0.002.

DeFi protocol fundamentals in one call: current TVL, 1-day and 7-day change, category, chains and website for any protocol — search by name, or screen the whole universe by category and chain ranked by TVL. Open DefiLlama data, refreshed server-side every 15 minutes.

USD Coin

Generate images from text prompts. Pay per call with USDC (x402) or credits - archtools.dev