Blockchain And Crypto x402 offerings

Historical US-dollar price of up to 10 crypto assets on a given date (or Unix time), by ticker or chain:address.

Use at the start of a trading decision: one-call market brief for trading agents: live BTC, ETH and SOL prices, crypto Fear & Greed, perpetual funding rates, the busiest prediction markets on a topic, and major FX rates, with timestamps and sources. Saves 5 separate calls. General information, not financial advice.

Perpetual futures data from a major on-chain derivatives exchange: hourly funding rate (and annualised), open interest, mark and oracle price, 24h volume, for one or all markets.

Top stablecoins by circulating supply: price, deviation from peg, peg type, supply in US dollars and number of chains; flags any that have lost their peg.

Large US-dollar stablecoin transfers on the Base network in recent blocks (default 100,000 dollars and up): from, to, amount, block and transaction, biggest first.

What is this Base network address? Wallet or contract, bytecode size, upgradeable proxy and implementation, token standard (ERC-20, ERC-721, ERC-1155) with name and symbol, owner, nonce and balances.

AI risk verdict for a Base network token contract address: send the address, get on-chain facts (name, symbol, supply, owner and whether ownership is renounced, upgradeable proxy, owner and contract holdings, burned share), red flags, a risk level and a short AI-written verdict. Use before your agent buys, accepts or lists a token. Facts, not financial advice.

Inspect any pay-per-call (HTTP 402) endpoint before you pay: decodes its payment terms (version, network, asset, price in dollars, payee), checks the listing metadata, lists problems that make agents fail, and gives a safety verdict: trap-level prices, payment in an unrecognised token, a payee on the sanctions list, or a domain registered in the last 30 days. Plus the seller's track record on the Base network: payments and distinct payer wallets to the payee in the last ~5.5 hours, and our longer samples where we have them.

Recent event logs of a Base network contract (up to 1,000 blocks back, 200 events), with token Transfer and Approval events decoded (from, to, amount).

Use before buying, accepting or swapping a token: one-call token verdict for a Base network token: contract control (owner, upgradeable, concentration), live price and price impact of a 1,000-dollar sell, recent transfer activity, trend indicators, and perp funding when a market exists, with red flags, a risk level and a plain-language AI verdict. Data, not financial advice.

Live US-dollar price of any Base network token, read directly from on-chain exchange pools (direct stablecoin pools and routes through wrapped ETH; the best quote wins). Returns price, route and pool fee tier.

Profiles for up to 10 Base network wallets in one call: wallet or contract, native and US-dollar stablecoin balances, and transaction count for each.

Live balances of a Base wallet: native ETH and US-dollar stablecoin, plus its transaction count.

Use before sending a transaction on the Base network: current Base network gas: base fee, suggested priority fee and max fee, and the cost in ETH of a plain transfer and of a typical token transfer.

A Base network block (latest, or by number): hash, time, transaction count, gas used and limit, base fee and fee recipient.

Explain or verify a Base network transaction: status, from/to, native value, fee, every token transfer (with symbols and amounts) and a one-line plain summary. Use it to confirm a payment arrived before delivering work.

ERC-20 token balance of any Base network wallet (the main US-dollar stablecoin by default): raw units, decimals, symbol and formatted amount.

Cheapest real end-to-end test of your pay-per-call (HTTP 402) client: pay US$0.002, get back what was paid (payer, amount, network, timestamp) and the text you sent; the settlement receipt is in the PAYMENT-RESPONSE header. A free trial call returns paid_usd 0. Use it to check a wallet, a client library or a facilitator before buying something bigger.

Live US-dollar price of any Base network token, read directly from on-chain exchange pools (direct stablecoin pools and routes through wrapped ETH; the best quote wins). Returns price, route and pool fee tier.

What is this Base network address? Wallet or contract, bytecode size, upgradeable proxy and implementation, token standard (ERC-20, ERC-721, ERC-1155) with name and symbol, owner, nonce and balances.

Top pay-per-call (HTTP 402) services by real demand: seller income sampled from on-chain stablecoin payments, counting only sellers with 3+ distinct payers (filters out testing and farming).

Check a Base network token contract before your agent buys, accepts or lists it: live on-chain facts (name, symbol, decimals, supply, owner and whether ownership is renounced, upgradeable proxy, owner's and contract's own holdings, burned share) with red flags and a short AI verdict. Facts, not financial advice.

Historical US-dollar price of up to 10 crypto assets on a given date (or Unix time), by ticker or chain:address.

Large US-dollar stablecoin transfers on the Base network in recent blocks (default 100,000 dollars and up): from, to, amount, block and transaction, biggest first.