Crypto & Blockchain

Registry of tokenized stock and ETF contracts on Robinhood Chain (chain id 4663): 25 verified token addresses with their on-chain price-feed addresses, chain metadata (RPC, explorer, gas token), and source citations for every entry. Read-only public blockchain data — informational only, no trading or brokerage functions.

Curated on-chain registry lookup for Robinhood Chain stock tokens: 20 equities and 5 ETFs with canonical contract addresses sourced from official documentation, plus chain id, public RPC endpoint, and block explorer. Deterministic and cacheable — the same catalog every call until the registry is re-verified.

Contract addresses for tokenized real-world assets on Robinhood Chain, an Arbitrum-Orbit L2 where equities like AAPL, NVDA, and TSLA trade as ERC-20 tokens. Returns address, asset kind, and price-feed reference per symbol so an agent can verify what it is interacting with before touching any contract.

List every verified tokenized equity and ETF contract live on Robinhood Chain — symbol, contract address, and oracle price-feed address per entry, with the official source URL and verification date included for audit. For agents mapping the tokenized real-world-asset landscape.

Get the latest Base block with its age in seconds, base fee and gas used. The latest Base block: number, hash, timestamp, age in seconds (so you know the node is not lagging), base fee, gas used. Public RPC, no key. Query: none.

Price of one crypto in terms of another -- BTC/USD, ETH/BTC, SOL/ETH, or any pair from 21+ major coins by ticker. Handles crypto/crypto pairs (e.g. how many ETH is 1 BTC worth) as well as a plain USD quote. Returns each leg's own 24h % change vs USD rather than a synthetic ratio change. From CoinGecko. $0.005/call.

Total supply for an ERC-20 token contract, from Etherscan's V2 API. Raw value only, no market data -- for price/market cap use /crypto-prices instead. $0.005/call.

Read the current on-chain JPYC balance of any EVM address on one or all supported chains (Polygon, Kaia, Avalanche, Ethereum), with the token contract and the block number observed at request time. Use before or after a payment, for treasury checks, wallet monitoring, and payment reconciliation. The result does not prove wallet ownership and is not a transaction-finality certificate.

Read the current contract-reported JPYC totalSupply on Polygon, Kaia, Avalanche or Ethereum, with the token contract address and the block number observed at request time. Use for periodic supply monitoring, cross-chain comparison, or verifying a current JPYC supply figure before citing it. Not for market price, reserve backing, circulating-supply analysis, or financial advice.

Brazilian financial & crypto market news, refreshed every 15 minutes from major Brazilian outlets: headline, summary, link, topic (crypto, macro, fx, regulation, companies), investor sentiment and 0-10 market relevance. Brazil is a top-10 crypto adoption market: central bank moves, Drex (CBDC) and CVM regulation move prices. Filters: tema, sentimento, relevancia_min. Free sample, no payment: https://api.brazilayer.com/v1/mercado/amostra

USD/BRL two ways: the official Central Bank PTAX rate and the LIVE crypto market (BTC/BRL, USDT/BRL), plus the Brazil premium (ágio): how much Brazilians pay above global price for dollar/crypto exposure. A classic emerging-market capital-flow signal, computed live from exchange prices at request time. Positive premium = capital-flight pressure; discount = inflow. Free sample, no payment: https://api.brazilayer.com/v1/mercado/amostra

Brazil macro snapshot in one call, straight from the Central Bank: Selic policy rate, IPCA inflation (monthly and 12-month), official PTAX USD/BRL rate, plus the Focus survey (the market's median forecasts for inflation, policy rate, GDP and FX for this year and next, updated weekly). The essential context pack for any agent trading BRL pairs or emerging markets. Free sample, no payment: https://api.brazilayer.com/v1/mercado/amostra

Reverse-resolve an Ethereum address to its primary ENS name (the reverse record set by the owner), read live on Ethereum mainnet. Returns `found:false` when the address has no primary name set. Live reads with automatic endpoint fallback.

USD Coin

Which x402 services are growing right now, by observed inflow across comparable windows.

Validate and sign a portable event hash chain

Base wallet score API / wallet reputation / address risk scoring / onchain wallet intelligence / counterparty check. Returns a 0-100 activity score with letter grade, smart-wallet (ERC-4337) detection, ETH and USDC balances, recent USDC flow, and a user profile for any Base address. For AI agents, fraud screening, and KYC/counterparty checks.

Tx Intent Classifier: decodes the REAL intent of an on-chain transaction (Base/Ethereum) and returns an Ed25519-signed risk verdict (safe/review/suspicious/dangerous). Catches unlimited approvals, opaque selectors, value-to-contract, reverted tx. POST {"tx_hash":"0x..","chain":"base"} or {"to":"0x..","data":"0x.."}.

Check whether a Robinhood Chain price feed has updated within its expected interval before relying on the quote. Returns age in seconds, the heartbeat budget, grace window, and a stale/fresh verdict, plus round metadata an agent can recheck on-chain itself via the included feed address.

Health check for a tokenized stock's price oracle on Robinhood Chain: verifies the latest round has a positive answer, valid round accounting, and an update timestamp inside the feed's 24-hour heartbeat window. Returns healthy, stale, or invalid, with every raw round value included. Checks that cannot be verified from official contracts report unsupported — never a silent pass.

Is the on-chain price for a tokenized equity trustworthy right now? Runs staleness, positive-answer, and round-validity checks against the asset's price feed on Robinhood Chain and returns a single status verdict plus per-check detail. For agents that gate downstream decisions on oracle freshness.

Oracle freshness monitor for tokenized stocks and ETFs: reports the age of the latest price update against the feed's heartbeat, flags non-positive or invalid rounds, and states plainly when a check (like sequencer uptime) cannot be verified. Raw round id, answer, and timestamps included for independent auditing.

Single higher-value composite report for one domain: DNS resolution, TLS/SSL certificate validity and issuer, RDAP/WHOIS registration and nameservers, and email deliverability (MX/SPF/DMARC) signals, plus a derived trust score and risk band. Built entirely from already-cleared, already-live internal capabilities (domain-dns-check-v1, domain-ssl-check-v1, domain-whois-lookup-v1, email-domain-deliverability-check-v1) -- no new source, no new licence question, no proprietary reputation database.

Prediction market arbitrage and same-outcome spread API for Polymarket, Kalshi, and Gemini. Finds YES or NO price gaps across venues.