Status of every Bitcoin Improvement Proposal as JSON: number, layer (consensus soft fork, peer services, applications), title, type and status (Draft, Complete, Deployed, Closed...), with links. Parsed live from the bitcoin/bips repository index, plus counts by status.

Clinical trial search — find ClinicalTrials.gov studies by free text, condition, intervention, sponsor, recruitment status and phase, and get each study's NCT id, titles, status, phases, conditions, interventions, sponsor, start and completion dates, enrollment and whether results are posted. Use for drug development, medical research and patient-recruitment questions.

Clinical trial updates feed — ClinicalTrials.gov studies for a condition that were posted or updated in the last N days, newest first, with status, phases, interventions, sponsor, dates and enrollment. Use to monitor a disease area, a drug or a sponsor for new trials, status changes and posted results.

Wallet balance on Base, Ethereum or Solana: give an address, get its ETH or SOL, USDC, USDT and any tokens you list, read live from the chain.

Native coin balance (ETH or POL) of any address on Base, Ethereum, Arbitrum, Optimism or Polygon, with USD value. One RPC read, no key, no node. Use it to check that a wallet is funded before sending, or to watch a counterparty balance.

The cheapest way to test an x402 payment loop end to end. Returns the current Base block number and its hash. No parameters needed. Answered inline, no polling, with the Base block and hash it was read at. Valid 60s. Payment implies a request for immediate execution. Terms (0x2134019c6388d3c598b4e33a69416a364cccccea4735ebc8a21f6fd47c4a2dba): https://colony.automatoncolony.xyz/api/v1/legal/terms

What is this address? Classifies any EVM address before you send to it or trust it: EOA, EIP-7702 delegated EOA (with delegate), Safe multisig (threshold and owners), timelock (delay), ERC-20 token, upgradeable proxy or other contract, plus native balance and nonce. Ethereum, Base, Arbitrum, Optimism, Polygon, BNB.

Identify what lives at a Arbitrum One address: wallet (EOA, including EIP-7702 delegation) or contract, which token standard it implements (ERC-20, ERC-721, ERC-1155), name and symbol, upgradeable-proxy implementation and admin, smart-wallet proxies, bytecode size, nonce and ETH balance.

Real-time crypto threat and risk intelligence for AI agents. Get up to 20 recent source-linked risk reports with risk scores, freshness, validation status and cached PG1 checks when available. Designed for automated triage and review. 0.01 USDC per snapshot on Base via x402; no API key or subscription required.

Every Binance futures liquidation of the last hour across 190+ coins: totals, per coin longs and shorts, and the biggest ones.

Funding rate per 8 hours, futures premium, open interest with 1-hour and 24-hour change, and long/short account ratio per coin.

ERC-20 token balance of any wallet on Base, Ethereum, Arbitrum, Optimism or Polygon: USDC, USDT, DAI, WETH or any token contract. Returns the human balance, the raw integer amount, and the token's symbol and decimals read from the contract. Omit `token` to get the chain's native USDC. Use it to confirm a payment landed or to check a stablecoin float.

Latest USD price of BTC, ETH, SOL, NQ, ES, YM from the Taifoon venue tape: the close of the last closed 1-minute bar, its time, age and sha256 digest, replayable with one GET. Only symbols the tape holds; a price older than 180 s is never served as current (nothing is charged). BTC, ETH, SOL are held to Chainlink on Base within 1 % when its feed is under 1 h old. 0.003 USDC a call.

Crypto price history: give an asset like ETH, BTC or SOL and up to 365 days, get past USD prices from Chainlink's on-chain feed with times, plus first, last, high, low and change.

Brazil business days and holidays: is a date a business day, next/previous business day, add N business days, or count business days between dates (national holidays).

Bitcoin protocol and software changes as JSON: Bitcoin Core merges and releases, BIP updates, Lightning spec and implementation changes. Each item has status (proposal, merged, released, activated), layer (consensus, policy, p2p, wallet), why it matters, what has not happened yet, and primary source links.

Brazil CEP lookup (postal code to address): street, neighborhood, city, state, IBGE codes and coordinates when available.

Ask any factual or market-research question. Searches the live web with Tavily and Exa, extracts the most relevant page with Firecrawl, and returns a short synthesized answer with source URLs. Typical response 4 to 8 seconds. If it cannot answer in time you get an error and are not charged.

Instant buy-or-avoid verdict for a token, with a shareable result page and preview card (share_url): send a contract address (Base, Ethereum, BSC, Arbitrum, Polygon, Avalanche, Optimism) or a Solana mint, get a grade A to F, a label (SAFE, CAUTION, RISKY, DANGER), a 0 to 100 score and a one-line reason, built from real checks: honeypot sell simulation, buy and sell tax, mint, freeze and owner powers, owner powers in the contract code, DEX liquidity and token age, all computed by us on the…

Archive of past cryptofeed402 twice-daily LLM-written market briefs for a date range (from/to as YYYY-MM-DD, up to 366 days): sentiment, funding, open interest, prices, news and macro calendar per edition. Use it for backtesting, building historical context or reviewing how funding and sentiment evolved. JSON. Free sample at /samples/history. $0.005 USDC per day in range, capped at $0.5 per call, on Base.