Crypto & Blockchain

Estimate the gas a transaction will use via eth_estimateGas — the pre-send read every tx-building, trading and settlement agent makes to size gas and avoid out-of-gas reverts. Pass from/to/value/data. Across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. Free public RPC; undercuts onesource at $0.001 on 6 chains.

Wholesale day-ahead electricity prices in EUR/MWh per European bidding zone, from the Energy-Charts API (Fraunhofer ISE; data CC BY 4.0 from Bundesnetzagentur/SMARD). Query: ?bzn=DE-LU|FR|NL|ES|IT-NORTH|SE4... (44 zones), optional ISO window &start=2026-07-12&end=2026-07-13. Returns timestamped price points (15-min or hourly slots, max 288). 1h cache.

Latest euro area risk-free spot yields from the ECB Data Portal (dataset YC, AAA-rated central government bonds, Svensson model; updated each business day ~12:00 CET). Query: ?tenors=3M,1Y,2Y,5Y,10Y,30Y (1-8 tenors from 3M to 30Y). Returns yields_pct per tenor, observation date, and the 2s10s spread in bp when 2Y and 10Y are requested. 1h cache.

Real-time oracle prices from Pyth Network (Hermes API): aggregate price, confidence interval (uncertainty band), EMA price and publish_time per asset, all vs USD. Query: ?symbols=btc,eth,sol (1-8 of: btc, eth, sol, bnb, xrp, ada, avax, doge, link, dot, usdc, usdt). Cross-check against CEX spot to detect oracle/spot divergence. 30s cache.

Circulating supply per stablecoin from DeFiLlama with computed net flows (delta_24h/delta_7d/delta_30d = net mint minus burn), peg type, peg mechanism and current price. Query: ?symbol=USDT for one asset, or ?top=10 (1-50, default 10) for the largest by supply. Served with a 30min cache.

Multi-source token due diligence report — aggregates security checks, market data, and liquidity analysis from 4+ data sources, then synthesizes an AI risk verdict with 0-100 scoring. Returns red/green flags, recommendations, and market context. One call replaces 4+ API integrations, response normalization, and LLM synthesis. Accepts USDC payments on Base and Solana

Whale holders for token

Run a provably fair giveaway on X/Twitter: pick crypto-random winners from a tweet's replies, with retweet, follow, hashtag, keyword, minimum-follower, and account-age conditions. Fixed price set upfront from your estimated entry count.

Biggest crypto probability moves (1h/6h/24h) — The fastest way to see where news is landing in crypto: active markets ranked by absolute probability change over your chosen window, with volume surge ratios. Same shape as /v1/movers, pre-filtered to crypto markets.

Crypto ETF Sentinel — Latest POS AM-extracted profile for one US spot crypto ETF issuer: custodian, sponsor fee, AP list, in-kind eligibility, basket size. Pass the issuer's SEC CIK as the ``cik`` query param.

Crypto ETF Sentinel — Side-by-side comparison of ALL trading US spot crypto ETFs — POS AM profile + XBRL financials + market data + Fund Health metrics. No params required (returns every trading ETF). Some Fund Health fields can be null if the market-data fetch fails.

Market scan data: strongest BUY/SELL states across major crypto pairs right now, with confidence. Machine-readable input for AI trading agents (USDC pay-per-call).

Listing Roast Quick Score x402: $0.001 GET marketplace listing score on the indexed /api/listing-roast URL. POST the same URL for the $0.01 full roast.

Recent buyers and sellers of a token with buy/sell pressure ratio and the most active traders labelled - reveals real-time demand and who is accumulating or dumping right now, smart-money trade-flow intelligence agents act on, from data behind an API key. token traders, who is buying, buy sell pressure, token demand, active traders, accumulation dumping, trade flow

Supported perpetual-futures trading pairs — the list of symbols (BTCUSDT, ETHUSDT, …) the funding-rate scanner and signals cover, as a clean snake_case envelope.

Current price, 24h and 7d change, and a simple bullish/bearish/neutral signal for a crypto asset.

USD Coin

USD Coin

Is crypto risk-on right now? One $0.001 answer: whether the BTC 200-day master gate is open or closed, the LONG/CASH state for the BTC and ETH sleeves, and the one-line verdict — all evaluated on UTC daily closes by a long-only rules engine. The cheapest crypto regime check on x402: poll it every cycle, buy the fuller reads only when the gate state changes. Research, not advice.

Current mid price for every Hyperliquid asset (perps + spot) in one call — a fast whole-venue price snapshot.

One-call on-chain analytics digest: biggest protocol TVL shifts (with $ amounts), trending tokens, and a recent-exploit overlay JOINED to the TVL movers (a bleeding protocol gets tagged with a matching hack). Packaged report, not raw side-by-side lists.

USD Coin

USD Coin

Lists the NFT collections a Base wallet holds — name, count and floor value — spam-filtered, via Covalent. For agents profiling a wallet's NFT exposure.