Wallet snapshot across Base, Ethereum and BNB Smart Chain: native balance plus balances of 8 major tokens per chain (USDC, USDT, WETH, DAI, WBTC/cbBTC...). No USD pricing.

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

Resolve an ENS name or Basename to an address (plus url/twitter/github text records), or reverse-resolve an address to its primary name.

Live health check of one public website's home page: up/down, HTTPS, redirects, speed and basic SEO tags. 0.02 USDC per check.

Explain a Ethereum transaction: status, fee, decoded method + args (openchain signature DB), and ERC-20 transfers with symbols and human amounts.

Repair one x402 route's Bazaar discovery metadata in one call. Send a resource URL and one real sample output; get the defect report plus a complete discovery package — full output schema inferred from the sample, a sub-500-char description with a use-when sentence, OpenAPI and well-known snippets, paste-in instructions — that ships only after passing both x402 SDK validators. Use this when your listing is hollow, invalid, or invisible in the Bazaar.

falcon.sol: Standardized financials for one company from SEC EDGAR: up to 15 fiscal years + TTM, balance sheet, ratios, XBRL tag provenance. $0.01 USDC.

Real-time product price lookup from a public e-commerce product URL. Use for product price checks, price monitoring, price comparison, shopping agents, ecommerce research, retail workflows, deal finding, and target-price tracking.

Screen up to 25 Base tokens in one flat-fee call: per-token SOLID / CAUTION / DANGER verdicts with scores and signals, sorted riskiest first, plus summary counts; tokens that cannot be fetched return UNKNOWN with a reason, and if most of the batch fails the call fails unsettled. Mode 'compact' returns per-token verdict and score plus the counts only. Use this when an agent holds a list of candidate tokens and needs the risky ones flagged before trading any of them.

Recheck watch pack: one $1.00 payment buys 250 change-checks for ONE endpoint ($0.004 per check instead of $0.005), good for 90 days. Pack credits persist across redeploys on the service volume. Returns an unguessable pack id — spend credits via POST /v1/recheck (body pack_id or X-Recheck-Pack header), and read the balance free at POST /v1/recheck/pack-balance. Use this when a monitoring loop checks the same endpoint on a schedule and wants one payment instead of hundreds.

Call this when you need the Solana memecoins traders are watching and a rug-check before you buy, swap, or recommend one. The list includes liquidity, market cap, pair age, 5m/1h/24h price and volume, buy/sell ratio, pump.fun bonding or graduation, and links to pump.fun, DexScreener, and Solscan.

Backtest any crypto strategy on 399 Coinbase coins, bias-free. Breakout, momentum, dip-buy or MA trend rules on Coinbase daily data with fees, slippage, H1/H2 split, luck flag and survivorship-bias-free universe.

Agent Reputation Check by Agentropolis: give a payTo and/or an agent / A2A / MCP URL. Returns owner, verified domain, real outside buyer history, wash flags and trust score from Agentropolis. Says when coverage is limited. Deterministic, no LLM.

Find 3-10 scholarly candidates for a question or topic. Returns DOI/OpenAlex IDs, authors, year, venue, source URLs, citation context, open-access location, and known retraction/correction warnings. JSON only. Does not claim that a paper proves a statement.

Daily crypto market regime: BTC/ETH trend, breadth, breakout watchlist. BTC/ETH vs 20/50-day MAs, market breadth (% of point-in-time top-N above 20DMA), coins nearest a 20-day breakout, and the R1 breakout strategy's gate and entry signals. Completed UTC daily closes only.

Market-level summary of the x402 agent economy from the full Bazaar catalogue: total services and endpoints, 30-day paid calls, estimated USDC volume, demand by category, network mix and the top 15 services. Testnet and self-test listings are excluded. Use this for the big picture in one call; for a full ranked list use x402-services, to find a specific API use x402-search.

Get the verified Solidity/Vyper source code for a deployed contract by address, sourced from Sourcify. Returns every source file (path + content), the contract name, language, compiler version and compiler settings (optimizer, evmVersion) — the full human-readable source an agent needs to read, audit or feed to an LLM. Supports Ethereum, Base, Arbitrum, Optimism, Polygon. Unverified contracts return `verified:false`. Live reads with cache fallback.

Add tax to a net amount or extract tax from a gross amount, using a supplied rate or an embedded table of US state (state + avg local) and worldwide VAT/GST rates.

Fetch a web page and return a concise summary and key points (SSRF-safe fetch + Claude).

County unemployment rate and 6-month trend from BLS Local Area Unemployment Statistics, for buyer, owner and lender agents. Returns the same records as locus_unemployment. Use this when your client can only call paid x402 routes. Use locus_unemployment instead when you can call Locus free tools (REST tools/call or MCP).