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Reference catalog of trade/quote condition codes (the numeric `conditions` seen on trades) with names, types, data types, and SIP mappings. From x402stock, a pay-per-call market & economic data API for AI agents. No API key or account; pay in USDC via x402.

The Crypto Fear & Greed index (0–100) with its rating, alongside the US stock Fear & Greed score for comparison, current BTC and ETH prices with 24h change, and ~90 days of crypto sentiment history. Pass `?days=N` to size the history. The crypto-sentiment companion to /api/v1/fear-greed (stocks). From x402stock, a market & economic data API (x402, USDC).

The daily US Treasury par yield curve (Constant Maturity Treasury rates) for every maturity from 1 month to 30 years, in percent. Defaults to the latest published day; pass `?limit=` for more recent days (max 250) and `?year=YYYY`. No ticker needed. Use for the risk-free rate, rate-sensitivity context, and yield-curve inversion in macro-aware analysis. From x402stock

What stocks and crypto Reddit is talking about most over the last 24h, by mention volume across the busiest Reddit money subreddits (r/wallstreetbets, r/stocks, r/CryptoCurrency, r/Bitcoin, etc.). Each ticker carries mentions, upvotes, and 24h change in rank and mentions; covered subreddits are listed per response. ?filter=stocks|crypto|all (default all), ?page=. From x402stock

The full FOMC meeting schedule (2025–2027) with the last and next meeting and days-until. Each entry carries the two-day meeting's start and decision date, year, and past/upcoming status. No ticker needed — the rate-decision calendar every macro-aware agent plans around. Source: U.S. Federal Reserve. From x402stock, a market & economic data API (x402, USDC).

US net liquidity (Fed balance sheet minus Treasury General Account minus reverse repo) as a 0–100 percentile with its label and 4-week trend, broken into its FRED components (WALCL, TGA, RRP, M2) plus ~52 weeks of history. A macro-liquidity gauge for risk appetite. Complements the /api/v1/fed-funds and other FRED macro endpoints. From x402stock, a market & economic data API (x402, USDC).

Reference catalog of trade/quote condition codes (the numeric `conditions` seen on trades) with names, types, data types, and SIP mappings. From x402stock, a pay-per-call market & economic data API for AI agents. No API key or account; pay in USDC via x402.

Cross-exchange spread tick — ONE $0.02 call returns the live executable spread for a pair across Binance, Coinbase, Kraken, Bybit: best bid venue, best ask venue, spread in bps, and a deterministic TRADE / THIN / NONE verdict. Built for arbitrage monitoring loops; escalate to /api/crypto ($0.07) for the full CEX arbitrage read with fees and transfer paths. 30s freshness, no LLM in the path.

Has US GDP been revised? BEA revises every estimate (advance, second, third); the Chainlink round history records each revision immutably, timestamped. Returns the ordered revision trail: every print, when it landed, the change from the previous, and the total revision. Series: gdp/pce/rfs level+change, sofr. Anyone can say GDP grew 2.1%; this says it was first printed at 1.4%, cut to 0.5%, then revised to 2.1% - each step verifiable on-chain.

Bibliography verification for AI research agents — POST up to 20 citations (DOIs or free-text references) and get a per-reference verdict: exists/not-found, retracted/withdrawn (Crossref + Retraction Watch + OpenAlex), and title/author/year mismatches against a real record. Built for agents auditing LLM-generated bibliographies before a citation ships.

Know Your Merchant (KYM) trust score: pass a merchant domain and get a deterministic 0-100 trust score with a band (high/medium/low/very_low/avoid) and human-readable reasons. Live signals: domain age from the RDAP registry of record, malware/phishing blocklist verdict via Cloudflare Security DNS, TLS certificate health, mail capability, and refund/privacy/contact page presence. The merchant-side check an agent runs BEFORE committing funds — the complement to know-your-agent.

Upcoming federal contract solicitations from SAM.gov. Filter by keyword, NAICS, or set-aside type. $0.20/query via x402 on Base.

US federal contract awards, SAM.gov opportunities, agency spend analysis, NAICS sector breakdown. $0.20/report via x402 on Base.

Wallet realized and unrealized PnL — per-token profit and loss and cost basis for any EVM address

Itemized fee breakdown and net P&L for any arbitrage trade — fees, slippage and gas. For arbitrage and trading agents.

Has US GDP been revised? BEA revises every estimate (advance, second, third); the Chainlink round history records each revision immutably, timestamped. Returns the ordered revision trail: every print, when it landed, the change from the previous, and the total revision. Series: gdp/pce/rfs level+change, sofr. Anyone can say GDP grew 2.1%; this says it was first printed at 1.4%, cut to 0.5%, then revised to 2.1% - each step verifiable on-chain.

Bitcoin volume-weighted average price in EUR for European market execution — Ed25519 signed attestation

Get gas price estimates across multiple EVM chains with USD cost

Get real-time stock quote with price, change, volume, and market cap

Check wallet eligibility for crypto airdrops (POST variant)

Get token holder analysis with concentration metrics (POST variant)

Paid ($0.01 USDC via x402). Narrative detail: content items, source attribution, and lifecycle updates for one narrative. Proxied from the Pulse service. Compute-first / settle-after — you are never charged when Pulse is unavailable or returns an error.

Get comprehensive domain intelligence (WHOIS + DNS + SSL) (POST variant)

Translate text between languages with automatic source language detection