Crypto & Blockchain

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

Paid HTTP+JSON x402 service for listing quality, buyer-agent skip reasons, and x402 discoverability audits.

List registered X accounts your wallet owns or has shared access to.

Fed liquidity and net dollar liquidity: Fed total assets minus the Treasury General Account minus overnight reverse repo, now and its 1/4/13/52-week change, trend EXPANDING/CONTRACTING/FLAT, percentile over two years and a 26-week series. Fed, Treasury and New York Fed data. Use to judge the macro tide for crypto and equities.

Risk-on risk-off market gauge: a 0-100 score and label from trade-flow regime, stablecoin issuance, the Treasury curve, tokenized treasury flows, perp crowding and macro releases. Use as one number before sizing any trade.

Analyze a chess FEN string: turn to move, complete legal-move list, and terminal-state detection including checkmate, stalemate, and draw by insufficient material or repetition. Malformed FEN comes back as a structured validity report an agent can act on rather than a bare failure.

Chess position analysis from a FEN string: every legal move in SAN and UCI notation, whose turn it is, and full game-state flags — check, checkmate, stalemate, draw, insufficient material, threefold repetition. Optionally validate and apply one move to get the resulting FEN. Deterministic rules logic, not engine evaluation.

Sanctions screen for an EVM wallet: one deterministic read of the public Chainalysis sanctions oracle contract. Call it mid-transaction before settling with an unknown counterparty — no account, no API key, one paid call returns sanctioned true/false with the oracle address for independent verification. Fail-closed: if the oracle is unreachable you get an error, never a false all-clear.

Euro exchange rates and forex reference rates ($0.001): official ECB euro rates for about 30 currencies (USD, GBP, JPY, CHF, CNY, ...) with the date and the change vs the previous fixing. Use for official FX conversion rates.

Gas price and transaction fees per chain ($0.001): base fee, priority fee percentiles and the USD cost of a transfer and a DEX swap on Ethereum, Base, Arbitrum, Optimism, Polygon and other EVM chains. Use before sending a transaction to pick the cheapest chain.

Crypto perpetual funding rates and open interest ($0.001): latest annualised funding rate and open interest of perp markets on Hyperliquid (crypto plus stock, index, gold, oil and FX perps), GMX v2 and gTrade, largest funding first. Use to spot crowded leverage cheaply.

New token launches on Base and Ethereum, risk-checked: every new pool against ETH, WETH or USDC on Uniswap v2/v3/v4 and Aerodrome in the last hour, with liquidity, sell simulation (honeypot check), Uniswap v4 hook powers, first trades and a verdict (LOW_RISK, CAUTION, HIGH_RISK). Filter by liquidity and verdict. Use to find fresh tokens.

Look up the daily reference rate for any pair among roughly 30 major currencies, returned with the date it applies to. Meant for pricing pages, invoicing, and financial reporting that need a consistent official benchmark rather than a fast-moving market quote. Updated once per business day and cached for an hour.

Currency exchange rate API: official daily reference rate for any major fiat pair (USD, EUR, GBP, JPY, ~30 ISO currencies), as JSON. A settlement/normalization reference published each business day — not a live trading feed.

Foreign exchange rate API: the official daily reference rate for any major fiat currency pair (~30 ISO 4217 currencies — USD, EUR, GBP, JPY, CHF, AUD...), as structured JSON with the rate date. Published once per business day — ideal for pricing normalization, invoicing, and financial reporting agents; not a live trading feed. Cached 1 hour.

Fetch the official daily benchmark rate between two of about 30 major world currencies, complete with the date the rate was set. Built for financial reporting, multi-currency pricing, and invoicing agents that need a stable reference number rather than a real-time trading feed. Refreshed once daily, cached for an hour between calls.

The official daily reference exchange rate between two major fiat currencies out of roughly 30 supported ISO codes, with the rate's effective date. Published once per business day, so it's built for invoice pricing, financial reporting, and normalization tasks rather than live trading, where a stale-by-seconds rate would be a problem. Cached 1 hour.

Stock and crypto news for one ticker: recent headlines and material corporate filing events (8-K) that mention the symbol, with keyword sentiment, source and link. Use to check the news before acting.

Spot token price in USD on Base, read from BaseSwap, SushiSwap and Uniswap v3 pools at call time. Returns priceUsd, the routed pair, backing liquidityUsd, confidence and blockNumber. Requires ?symbol=TICKER (e.g. WETH) or ?token=0xADDRESS. Errors: 400 missing_symbol|unknown_token, 404 no_reliable_price when pools are too thin, 502 upstream_read_failed. Depth is /liquidity; a size-aware quote is /slippage. Chain-pinned; bare /price = BSC.

Spot token price in USD on OP Mainnet, read from SushiSwap and Uniswap v3 fee tiers pools at call time. Returns priceUsd, the routed pair, backing liquidityUsd, confidence and blockNumber. Requires ?symbol=TICKER (e.g. OP) or ?token=0xADDRESS. Errors: 400 missing_symbol|unknown_token, 404 no_reliable_price when pools are too thin, 502 upstream_read_failed. Depth is /liquidity; a size-aware quote is /slippage. Chain-pinned; bare /price = BSC.

Ranked cross-DEX arbitrage spreads across every liquid pair on BSC / BNB Chain (PancakeSwap v2/v3, Biswap, ApeSwap). Returns opportunities[] with pair, grossSpreadBps, buyAt, sellAt, optimalTradeSizeUsd, capturable. GROSS, before gas and MEV. Optional ?minSpreadBps=20 (default 10), minVenueTvlUsd, limit. Send one param: a bare call skips the free tier. Errors: 400 bad_min_spread. Scans EVERY pair; for one known pair use /route. Bare = BSC; also /polygon /arbitrum /avalanche /optimism /base.

Pre-trade depth verdict for a pair on OP Mainnet: is this market thin enough to hurt you. Returns depthClass DEEP|MODERATE|SHALLOW|VERY_THIN, totalTvlUsd, venueCount, topVenueShare, midSpreadBps, flags. Requires ?pair=SYM/SYM (e.g. WETH/USDC). Errors: 400 bad_pair, 404 no_pools, 502 upstream_read_failed. Depth only - NOT a contract audit or honeypot check. Per-venue detail is /liquidity. Chain-pinned; bare /risk = BSC.

Ranked cross-DEX arbitrage spreads across every liquid pair on OP Mainnet (SushiSwap and Uniswap v3 fee tiers). Returns opportunities[] with pair, grossSpreadBps, buyAt, sellAt, optimalTradeSizeUsd, capturable. GROSS, before gas and MEV. Optional ?minSpreadBps=20 (default 10), minVenueTvlUsd, limit. Send one param: a bare call skips the free tier. Errors: 400 bad_min_spread. Scans EVERY pair; for one known pair use /route. Chain-pinned; bare /scan = BSC.

USD Coin