Is it safe to pay this address? One check before sending or accepting crypto: OFAC SDN sanctions screen, wallet age, EOA or contract, first funder and recent large transfers on Base, Ethereum, Arbitrum, Optimism or Polygon (wallet kind and activity on Solana), plus the token's 0-100 risk score when a token is given. Returns ok, caution or block with plain reasons and each check in full. Rules-based, not legal advice.

Whale and large-trade tracker for an ERC-20 on Base: every buy and sell in the last N minutes on the token's deepest WETH/USDC pools (Uniswap v3 or Aerodrome), with USD size, side, wallet and transaction for the largest trades, buy/sell volume and net flow, and the wallets that bought or sold the most.

Was this company hit by ransomware? Leak-site claim lookup by company name or domain. $0.01 USDC on Base per call. Returns matching ransomware-group claims with group, dates, country, sector and sources. Don't use this as proof of a breach; these are unverified claims from criminal leak sites.

Check a domain's SSL/TLS certificate expiry and renewal from CT logs. $0.01 USDC on Base per call. Returns issuer, validity, days left, % of lifetime used, renewal cadence and a renewal-stall heuristic from Certificate Transparency logs, plus a live HTTPS pass/fail probe. Don't use this for inspecting the exact certificate served live; details come from CT logs.

Whale and large-trade tracker for an ERC-20 on Ethereum: every buy and sell in the last N minutes on the token's deepest WETH/USDC pools (Uniswap v3), with USD size, side, wallet and transaction for the largest trades, buy/sell volume and net flow, and the wallets that bought or sold the most.

Mycelium Market Snapshot — live Mycelium Strategy liquidity allocation plus Solana top-performing tokens, in one JSON call. MYC reward: the first payment from a Solana wallet also sends 1337 MYC to the paying wallet (one reward per wallet).

Whale and large-trade tracker for an ERC-20 on OP Mainnet: every buy and sell in the last N minutes on the token's deepest WETH/USDC pools (Uniswap v3 or Velodrome), with USD size, side, wallet and transaction for the largest trades, buy/sell volume and net flow, and the wallets that bought or sold the most.

Whale and large-trade tracker for an ERC-20 on Arbitrum One: every buy and sell in the last N minutes on the token's deepest WETH/USDC pools (Uniswap v3), with USD size, side, wallet and transaction for the largest trades, buy/sell volume and net flow, and the wallets that bought or sold the most.

Performs comprehensive URL health checks, measuring response time, status code, security headers, and TLS/SSL certificate validity. Route: GET /paid/health-check?url=https://example.com. Ideal for automated monitoring and endpoint auditing.

Audit a Hyperliquid wallet address you already know: every open perpetual position with side, size, leverage, unrealized PnL, liquidation price, and distance-to-liquidation percentage. Does not discover or rank wallets - Hyperliquid's public API has no leaderboard endpoint, so this only audits an address you supply. Paid in USDC on Base.

Check a Ethereum wallet's ERC-20 approvals: allowances for 8 major tokens (USDC, USDT, WETH, DAI...) to common spenders (Permit2, Uniswap Universal Router v4, Uniswap Universal Router, Uniswap SwapRouter02...); flags unlimited approvals.

Pre-payment check of an x402 endpoint: one unpaid request, decodes the 402 offer (v1/v2): network, USDC or not, USD price, payTo, testnet, red flags.

Checkup for x402 buyer clients. Pay once and get a field-by-field diagnosis of the payment your client signed (amount, recipient, validity window, clock offset, nonce, EIP-712 signature) and of the request that arrived, plus the facilitator's verify and settle results. Base mainnet payments get the full diagnosis; Base Sepolia payments get a preview with the status of each check only.

402xAgent: probe of a public URL (blocks private, loopback and link-local addresses on every redirect hop) for an x402 PAYMENT-REQUIRED challenge. Never pays the target. $0.02 USDC on Base after 5 free checks per UTC day.

Earnings date and earnings history of a US stock ($0.01): when the company reports next (projected from its past 8-K earnings releases), its last quarters' revenue and diluted EPS with year-over-year growth, and whether growth is accelerating vs its own trend. From SEC EDGAR; no analyst estimates. Use before earnings season or a stock trade.

Risk signals for a fragrance listing: sales channel, price per ml, listing words, seller domain and EU Safety Gate. Does not authenticate a physical bottle. Provide url, or brand and seller_domain.

Real MCP Streamable HTTP handshake (initialize + tools/list, no tool call): reachability, protocol version, tools, schemas, latency, OAuth metadata.

Check an x402 seller before you pay it. Probes the endpoint now, checks that its payment can actually succeed (token EIP-712 domain, payTo), and adds its 30-day uptime from our monitor of paid Bazaar listings, how many distinct buyers paid it, and how its price compares with similar listings, with cheaper well-used alternatives. Returns a verdict (ok, caution, avoid) with the reasons.

Check if a token or LP is locked before you buy, via X-Lock by Liquid Logic X: send an ERC-20 address (optional chain; default all 11, incl. Base, Ethereum, BNB, XRPL EVM), get locks, unlock dates, claimable and % of supply locked. $0.005 USDC on Base.

Audit your x402 endpoint before buyers hit it. Checks that it answers 402 on the right method, that the payment options can actually be signed (EIP-712 domain of the token matches extra.name and extra.version), that the resource URL is the https URL buyers call, and that /openapi.json and /.well-known/x402 match. Includes the CDP validate verdict, whether the CDP Bazaar lists the endpoint, its payers in 30 days, and its search rank and competitors' prices for up to 3 queries.