Onchain & crypto

Cryptocurrency price: current USD price, 24h change, market cap and 24h volume for a coin by id or symbol (bitcoin, ethereum, solana, usdc and 100+ others) from CoinGecko's free API. $0.01 per lookup.

Crypto to fiat conversion: '0.5 btc to usd' or '1000 usdc to eur' at the current CoinGecko price, returning the value, rate and time. Supports USD, EUR, GBP, CAD, JPY and other major fiats. $0.01 per conversion.

Crypto price lookup: current USD price of bitcoin, ethereum, solana, USDC and other major coins by name or symbol, with 24-hour change, high, low and volume from Coinbase public market data (CoinGecko fallback). Live cryptocurrency price for agents, no API key. $0.01 per lookup.

Change watch for redirect chain tracer: runs the check and compares it with the result from your previous call for the same url (kept 90 days), returning the current answer, changed true/false, exactly which fields changed with before/after values, and when it was last seen. Call it on a schedule to be told when trace the full http redirect chain for a url changes. $0.01 per check.

Bulk redirect chain tracer: up to 20 urls in one call, processed concurrently, results returned in input order with a per-item error field and a count of failures. Same answer per item as the single /redirect-trace endpoint (Trace the full HTTP redirect chain for a URL). Batch enrichment for agents that hold a list. $0.01 per batch.

Exit capacity for one Kamino reserve: oracle-marked USD vs the maximum a liquidator could realise selling now, the exitable fraction, and the verdict with its corroboration receipt. Distinguishes transfer-permissioning from thin depth.

Verify declared token audience and issuer after local cryptographic validation

Solana token safety check — mint authority, freeze authority, top holder concentration, liquidity, honeypot detection, metadata mutability, token age, Token-2022 extension risks, rug risk score

Free repository documentation for MCP and A2A agents. Bounded no-signup trial with shared cache.

VAPE dex_volumes — DEX trading volume on a chain by venue, each with its logo (default Base) — real trading activity across the chain's exchanges.

+8 more from VAPE

x402 Endpoint Payment Check. Check an x402 endpoint's 402 payment-required body before you rely on it. Reports whether the contract is payable, whether it is opted in to the Bazaar catalogue, and whether a buying agent can read its input schema by machine. Every defect carries a JSON evidence path. Reads the body you supply; it does not pay or call the endpoint. A PASS is not a correctness guarantee and not a claim that the service is accurate.

+1 more from LUMI Verifier

Discover what your assets could earn through lending—and where to find the strongest rates. Compare supported lending markets to find the best rates for the assets you hold and the amount you want to put to work.

Realized PnL and funding summary for an address

+4 more from TradeSonar

Native ETH balance for one Base network address, read live from a public Base RPC node (eth_getBalance) and returned with the snapshot block it was read at.

Find auspicious dates in Japan: list days in a range (up to 366 days) matching rokuyo (e.g. taian) and optional weekdays (e.g. sat,sun) - for scheduling weddings, moving, contract signing and ceremonies.

Use for anything needing an up-to-date Brazilian benchmark rate: pricing a loan, indexing a contract, converting USD/BRL. No body required. Returns Selic (Copom policy rate), CDI (interbank rate) and USD/BRL (PTAX sell rate), each with its reference date, straight from the BCB's own SGS API.

dappgrade score — front-end integrity verdict for an onchain app, looked up by contract address. Inspects the app's public web front-end, not contract bytecode or admin control. Returns ok / caution / avoid / unknown with the coverage the verdict rests on.

List all blockchain networks supported by this API's security scanning — Ethereum, BSC, Polygon, Arbitrum, Base, Optimism, Avalanche, Fantom, Solana, and 20+ chains with chain IDs and names. Accepts USDC payments on Base and Solana

+12 more from defi.hugen.tokyo

Look up any Ethereum address — returns entity labels, name tags, and categories from 412K+ labeled addresses. AI agent API for on-chain identity resolution

Next upcoming Japanese public holiday with countdown — holiday name, exact date, and days until. Plan around Tokyo market closures and gotobi day shifts. Complete coverage through 2099. Accepts USDC payments on Base and Solana

+5 more from gotobi.hugen.tokyo

Current base fee + priority fee (gas price) for a chain (Alchemy). x402-paid, USDC on Base.

+11 more from api.cortexcloud.org

Get a detailed merchant deep-dive by wallet address. Returns volume stats, buyer diversity, trend signals, and recommendations.

Base block details: Return the latest Base block number and timestamp. Focus: blockchain development. Uses live Coinbase Exchange or Base RPC data.

Token sell proceeds shortfall — Local finite-change elasticity: Local finite-change elasticity for Token sell proceeds shortfall. Supplied token observations only. Deterministic calculation or caller-threshold verdict, not a live scan, safety proof or trade recommendation. Specialised preset in a shared 50-profile, 20-operation engine. 0.01 USDC includes one bounded local finite-change elasticity report.

+477 more from market.datapackvibe.com

Every Blockchain IQ analytics dashboard on one page in a single call, each with all its charts and the analyst's read of every chart. section=markets: market overview, DeFi TVL and yields, stablecoins, derivatives, liquidity, volatility, treasuries, fundraising, exploits and more. section=networks: one dashboard per chain (Bitcoin, Ethereum, XRP Ledger, Base, Arbitrum, Aptos, Provenance, BNB). JSON, no API key. $0.25 per call. Blockchain IQ.

cryptoanalysis.info daily Bitcoin advisory call for the current UTC day, with confidence and bounded completed-session history.

Crypto price history as OHLC candles from on-chain perp DEXs: open/high/low/close, base volume and trade count per interval (1m, 5m, 15m, 1h, 4h, 1d) for a coin (BTC, ETH, SOL, and more). Returns up to 500 candles, oldest first. Data source: Hyperliquid (dYdX fallback).

Name, symbol, decimals and total supply of any ERC20 contract in one call. Useful to label a token address before showing it to a user. Via eth_call.

Suggested maxFeePerGas and maxPriorityFeePerGas from the last 20 blocks of real fee history, at slow, normal and fast percentiles. Beats guessing a gas price and getting stuck in the mempool. Via eth_feeHistory.

How much of a token a spender is still allowed to move on an owner's behalf, and whether that approval is unlimited. The check to run before an approve, and the one that finds forgotten infinite approvals. Via eth_call (allowance).