x402-data-api.sigrunner.workers.dev x402 offerings

Cheap LLM answer (Llama 3.2 3B on Workers AI) for a prompt up to 500 chars. Pay per call, no API key.

ERC-20 allowance(owner, spender) on Base, raw + formatted, flags unlimited approvals.

Is a Base address a smart contract or an EOA? Returns is_contract and bytecode size. Use when an agent must decide whether a recipient is a contract before sending funds or approving it.

Transaction count (nonce) for a Base address, latest and pending. Use when an agent needs the next nonce for a Base address before signing a transaction.

Raw storage slot (eth_getStorageAt) of a Base contract. Use when an agent needs proxy implementation/admin slots or raw contract state.

ERC-20 total supply on Base, raw + formatted with decimals and symbol. Use when an agent needs a token's circulating-supply base for market-cap or dilution math.

Wallet screening bundle (balance, activity, contract vs EOA check): ETH balance + balance_usd + tx count + contract-code check (EIP-7702 delegated-EOA aware) for a Base mainnet address, in one call.

Crypto Fear & Greed Index (alternative.me): current value 0-100, classification, history of last N days. No params. Use when an agent needs a market-sentiment gauge.

Top DeFi protocols by 24h fees (DefiLlama): name, 24h/7d fees USD, 1d change, plus market total. No params. Use when an agent needs which protocols earn the most.

Security enrichment: tech-stack fingerprint + CVE mapping + EPSS + CISA KEV + verdict for a domain

Spot token prices from DefiLlama — pass comma-separated ticker symbols or CoinGecko ids, get price/change_24h/symbol/confidence/timestamp.

Security scan of a target MCP server: audits every advertised tool for prompt-injection / tool-poisoning / exfiltration / dangerous-capability / hidden-unicode (OWASP LLM01/LLM08). Returns findings + risk score + verdict (clear/review/block).

Domain enrichment: firmographic data + SSL certs + subdomain enumeration + tech-stack fingerprint + verdict (domain age)

Top DeFi lending/LP yields — project, chain, symbol, pool id, APY breakdown + 1d/7d/30d APY trend, IL risk (incl. il7d), exposure, reward/underlying tokens, outlier flag, mu/sigma, DefiLlama stability forecast, TVL. Filter by project, chain, or stablecoin-only; sort by TVL (default) or risk-adjusted APY (apy/sigma).

Query live Polymarket prediction markets — question, outcomes, live prices, bestBid/bestAsk/spread, volume24hr/volume1wk, oneDayPriceChange, clobTokenIds, conditionId, category tags, liquidity, end date. Ranked by volume24hr; filter by keyword.

6-venue perp funding rates — Binance+Bybit+OKX+Hyperliquid+dYdX+Gate — top coins by 24h volume, per-venue funding + per-venue open interest (USD) + an OI-WEIGHTED CEX↔DEX arb verdict: thin-book venues are screened out of the spread so the cheapest-long/richest-short venue is executable size, not a near-empty-book mirage. Plus premium/basis, annualized_hl/okx/binance/bybit/gate, LONGS_PAY/SHORTS_PAY/NEUTRAL signal, next_funding_ts, mark/oracle prices.

Current Base mainnet block number. Use when an agent needs the latest Base block to time or sanity-check a transaction.

Current Base mainnet gas price (wei/gwei), EIP-1559 base_fee_gwei/priority_fee_gwei, and gas_price_usd. Use when an agent must estimate gas cost in USD before sending a Base transaction.

ETH balance of a Base mainnet address, incl. balance_usd. Use when an agent needs an address's ETH balance in ETH and USD on Base.

ERC-20 token balance of a Base mainnet address, incl. symbol, decimals, balance_formatted. Use when an agent needs an ERC-20 balance for a Base address before a swap or transfer.

Transaction details by hash on Base mainnet.

Transaction receipt by hash on Base mainnet: status, gas used, full logs, L1 fee breakdown, l1_fee_usd/total_fee_usd.

Contract-code check for a Base mainnet address (is_contract + code size + EIP-7702 delegated-EOA detection). Use when an agent must check whether a Base address is a contract or an EOA before interacting.

Token security / honeypot detector for a Base mainnet ERC-20: EIP-1967/1822 proxy + upgradeability detection, bytecode dispatcher scan for mint/pause/blacklist/fee-setter/ownership selectors, owner() renouncement check, and a live eth_call state-override simulation testing whether a synthetic wallet can actually transfer() the token. Returns risk_score (0-100) + verdict (clear/review/block) + human-readable flags. Use when an agent needs detailed honeypot, mint, pause and proxy checks for a Base ERC-20.