x402 Finance API

Paid API returning US housing and mortgage indicators: 30-year and 15-year fixed rates, ARM rates, housing starts, building permits, existing home sales and the Case-Shiller home price index, sourced from FRED and refreshed weekly. Single GET /report endpoint, 0.03 USDC per call on Base or Solana.

Pay-per-query API returning technical analysis for crypto, equity and forex tickers: indicator readings such as RSI, MACD, Bollinger Bands and ADX across multiple candle timeframes, with a confluence score and a signal summary generated by a language model.

Scores recent news headlines for a given ticker, company or market topic, returning a bullish/bearish/neutral distribution and an aggregate sentiment score from -1 to +1. One endpoint, 0.05 USDC per query.

Tollbooth — 59 verified tax, finance, lending, real-estate, retirement, investing, crypto and business calculators for AI agents, paid per call in USDC on Base mainnet (no account, no API key; $0.01–$1.00 per call via the Coinbase CDP facilitator). Every answer ships a formula/method trace, cited sources with a 2026 data-vintage stamp, and a reproducible SHA-256 hash over the RFC 8785 (JCS) canonical fixed point {endpoint, inputs, result, method, dataVintage} that any client re-derives for free with POST /v1/verify-hash — recompute the math instead of trusting the server. Free golden-vector self-checks at /v1/golden/:id publish expected inputs, results, and hashes. Optional paid tier: Ed25519-signed audit-grade Verification Receipt (POST /v1/receipt/:id — $1 per call, $5 per report; a normal paid answer does not include it). Tollbooth authors Golden-Vector Provenance (GVP), a single-author draft provenance spec (Apache-2.0 code / CC-BY-4.0 spec): the npm package golden-vector-provenance is published (v0.7.0, matching git tag v0.7.0), and a spec PR carrying the field is under public review at x402-foundation/x402#3304 (discussion #3234). Payment-rail-agnostic by construction: the fixed point binds the question and the answer, not the settlement rail. Also a free neutral verifier for any service's response (POST /v1/gvp/check).

Real-time Hyperliquid BTC/ETH liquidation risk index built from live on-chain position data: notional at risk if price moves +/-1%/3%/5%, the closest position to liquidation, and current funding rate. Also serves backstop liquidation events, gas price, and other example x402 endpoints.

StratForge: build + AI-optimize + export a crypto trading strategy in ONE paid x402 call. Tiers by optimizer depth - Flash 2min $2.99, Deep 15min $8.99, Ultra 60min $24.99. Perp futures (OKX Top-20) and Polymarket Up&Down. Paper now, live soon on app.apevsbot.com.

DeFi protocol risk score: TVL, hack history, audit status, contract safety, AI verdict, plus current supply/lending yields (APY)

Pay-per-call API for crypto perpetual futures: funding rates ranked across roughly 100 Binance perp markets, the list of covered symbols, and the current Fear and Greed sentiment index, returned as structured JSON.

Portfolio risk API: returns 95% VaR, Sharpe ratio, max drawdown, annualized volatility and a pairwise correlation matrix for a list of tickers, with optional weights.

API de calcul fiscal & retraite français 2026, sourcée et datée sur les 32 régimes de retraite. Chaque réponse porte ses sources et son niveau de confiance : fiable / estimé / partiel / non calculable.

Checks invoices against purchase details and returns evidence, discrepancies, and review signals through paid Base USDC x402 calls.

Pay-per-call API returning perpetual futures open interest for BTC, ETH, SOL, AVAX, LINK and ARB across OKX, Hyperliquid and dYdX: USD totals, per-exchange breakdown, 5-minute delta and an accumulating or deleveraging signal. $0.05 in USDC per call on Base or Solana.

Agent-payable APIs over x402 (USDC on Base): swaps, memecoins, 216 endpoints. No API keys, no signup. Pay per call.

Relays Hyperliquid HIP-4 prediction market data over x402: a catalog of outcomes with their metadata, and the settled result for a single outcome by id. Upstream payloads are relayed verbatim. Operated by x402 Atlas, not by Hyperliquid.

Paid API returning DeFi liquidation cascade risk for Morpho Blue and Aave V3 lending markets: at-risk positions, liquidatable collateral and a cascade risk score.

US sales tax calculation API for AI-agent commerce. Returns the combined state+local rate, taxability by work type, economic-nexus alerts and a confidence score for all 50 states + DC. Pay per call in USDC on Base via x402 ($0.005) or use an API key.

Live crypto and market data for AI agents, paid per request in USDC on Base (x402 v2): liquidity magnets, order book walls, funding and open interest across 13 exchanges, liquidations, spot ETF flows, candles, chart patterns, the Owl Score, news and three ready packs (coin brief, trade setup, money flows).

One call returns risk-on or risk-off for the day, today's high-impact prints, and whether a watched show dropped. Price is 0.01 USDC on Base.

Pay-per-query API returning US macro data (Fed funds rate, curve yields and spreads, CPI and Core PCE, M2, GDP, unemployment, VIX, Fear and Greed index) together with a macro regime summary generated by a language model.

Resolves all 10,000+ US public stock tickers to SEC CIK numbers, recent 10-K/10-Q/8-K filings, and entity metadata.

CriptoNous x402 — pay-per-query crypto market intelligence. Whale accumulation vs distribution · smart-money flow · pumping/dumping narrative heat · market regime · multi-source confluence with cited sources. ownerBrief for human owners. hermes.pulse $0.02 · poseidon.flow $0.05 · swarm.pulse $0.12 · delfos.signal $0.25 · session.24h $9. Rails: Solana USDC · Base · BNB · Robinhood USDG. Manifest: https://app.criptonous.com/.well-known/x402 NFA — analysis only; never trade execution.

Stateful 5-minute delta feed for autonomous trading bots: computes real-time shifts in DEX buy/sell ratio, DeFiLlama APY spreads, and Polymarket odds.

First comprehensive AML/CFT compliance oracle for the agent economy. Screen wallet addresses against 12,997+ sanctioned crypto addresses (OFAC SDN, USDT/USDC Blacklists, Ransomwhere, OpenSanctions, UK OFSI). Search 1.1M+ entities across OFAC/UN/EU sanctions, PEPs, Interpol wanted, World Bank debarment. 179-country jurisdiction risk scoring. Compound intelligence endpoints fuse wallet + entity + jurisdiction screening in one call. Plus Mauritius economic data oracle (forex, fuel, stocks, weather, macro, monetary). ERC-8004 Agent #27961 on Base. CDP Facilitator integrated.

Options market data API returning unusual options activity, put/call ratio and the largest block trades for a given ticker, paid per call via x402.