Every agent-payable API.

The FHFA House Price Index for a geography: the current index level plus year over year, quarter over quarter and five year growth, with momentum flags and a short history. State and metro CBSA levels are covered directly; county and ZIP resolve to the state level index. Public domain, US only.

Live feed of freshly-detected malicious addresses on Base — address-poisoning seeders caught via zero-value transfer sprays, updated continuously by our on-chain collector. Poll ?since=<unix> to ingest only new threats into your agent's blocklist. Deterministic, evidence-backed, machine-readable.

Estimate the effective US import duty for one HTS code from one origin country. Returns the base rate (MFN or FTA), the additional trade-war layers (Section 301, Section 232, IEEPA) with their Chapter 99 provisions, the combined effective rate, and an optional landed-cost estimate.

What changed in the x402 Bazaar catalog since yesterday: price changes and payTo changes (the address you'd pay moved — a pre-payment guard). ?type=price,payto to filter. Objective a->b diff, no labels — only a holder of past daily snapshots can compute it. For registries/agents that must not route on stale data.

Machine-readable map of the x402 service ecosystem on Base: price range, category, endpoint count, live health & latency per service — built from our continuous catalog+reliability scan. ?since=<unix> for newly-launched services; ?category=/?health=/?sort= to filter & rank. Skip scanning the whole Bazaar yourself. Objective facts, machine-readable.

Census of the x402 ecosystem from our daily Bazaar snapshots: which domains launched or disappeared since yesterday, price-median drift, and network mix. ?kind=new|gone for the machine-actionable churn roster, or full pulse with aggregate + timeline. Only a holder of past snapshots can compute churn — objective counts, no quality judgment, machine-readable.

Resources for a specific origin/domain

Paginated transfers where merchant is recipient

Paginated list of facilitators with stats

Aggregate stats for a merchant

24h DEX trading volume by chain and protocol

Moment Essentials: deterministic apparent tropical ephemeris for one exact UTC instant—10 bodies, signs, motion, lunar phase, major aspects, provenance, and audited error bounds.

AI-generated social research: Twitter/X activity, Telegram presence, website analysis, mentions, sentiment, and entity verification.

ATLAS covenant stress detail for one issuer.

Actionable GBLIN treasury recommendation (invest/hold/reduce/defer) with confidence and suggested allocation, driven by on-chain Crash Shield state.

Aegis briefing change feed — diffs since a given timestamp

AML / counterparty screening for a Base agent wallet (OFAC sanctions + exposure + scam list)

On-chain trust/reputation score for a Base agent wallet

Agent-native web reader over x402 — send a URL, get back clean markdown: no signup, no API key, no SDK required. Pay-on-success: a fetch that fails or returns too little content settles nothing. Read $0.004; prepay $1 = 10,000 credits, spent at 80% of the per-op price (20% off). Docs: https://agentx402.ai

Exchange rates. Latest or historical FX rates between currencies, sourced from the European Central Bank (Frankfurter API). 30+ currency pairs. Optional amount conversion. No commercial restrictions. Specify a base currency (default USD), an optional quote currency or list, an optional date (YYYY-MM-DD or 'latest'), and an optional amount to also receive a converted value when a single quote is supplied.

AgentOracle: top N on-chain crypto tokens by market cap. Pass `limit` (1..100, default 20). Same per-token shape as /tokens — price, 24h volume, market cap, liquidity, 24h price change.

Constitution-first airdrop and incentive screening with Farm Score 0-100, risk flags, and optional EVM contract triage. No on-chain claim execution.

Active subway service alerts with direction, severity, and estimated delay minutes

All DEX pairs for a token with liquidity data

Deterministic Phase 1 alpha, resilience, treasury-strength, and regime-fit signals for one issuer.

Is price over-extended? Distance from MA20/MA50, Bollinger-band position and a z-score in one read. Use to avoid entering after price has stretched far from its mean. Mean-reversion context.

Real-time arbitrage spreads between tokenized securities and actual stock prices. Identify premium/discount opportunities.

Cash dividend history for a US stock — ex-dividend/pay/record dates, per-share amount and payout frequency.

OHLC candlestick bars for a futures contract — historical aggregates with settlement price and dollar volume by contract ticker.

Reference overview for a ticker — name, exchange, market cap, shares outstanding, industry and description across stocks, crypto and forex.

US Treasury yield curve — constant-maturity market yields from 1-month to 30-year, daily history.

SEC Form 4 insider transactions for a US stock — director/officer buys and sells with shares, price and value, a smart-money signal.

US labor market — unemployment rate, participation, average hourly earnings and job openings, macro time-series.

FINRA daily short-sale volume for a US stock — short volume, total volume and short-volume ratio, an intraday sentiment signal.

Stock split history for a US stock — execution dates and split ratios with price-adjustment factors.

ATR-based expected price range for the period: the 68% and 95% probability bands around current price. Use to set realistic targets, stops and breakout thresholds. A statistical range, not a directional forecast.

Attest a decision: sign (input_hash, output_hash, decision) yourself, or omit the signature and the treasury signs — then dual-chain anchor. Free re-verify at /v1/attest/verify. $0.01 USDC.

🆕 Lists the newest B20 tokens created on Base (from the B20Factory precompile) — variant, symbol, decimals, block. B20 is Base's native token standard and dozens launch hourly. A discovery feed for agents hunting new B20 launches early. Run b20-safety on any address before touching it — new ≠ safe.

Text-to-speech synthesis in 1 of 10 standard voices (5 male M1-M5, 5 female F1-F5) across 31 languages, up to 500 characters, returned as inline WAV audio. Use it to: give an agent a spoken reply, read an alert aloud, narrate a short UI prompt, add voice to a chatbot response, speak a confirmation message. Cheapest tier. USDC on Base via x402, no API key, no signup.

Base network risk signal (normal/caution/risk-off) for ETH, BTC and USDC computed from Chainlink oracles, with feed-staleness and USDC-depeg checks. Cheap, high-frequency market-regime feed for autonomous agents.

Batch Base token safety, honeypot, rug-check and swap-preflight verdicts for up to 5 EVM contracts before a buyer agent signs or routes a swap. Returns PROCEED/CAUTION/REJECT actions, safety scores, evidence, warnings, aggregate counts, and a non-breaking 0.50 USDC bundled-risk-pack payable tier. Free single-token preview: /token-safety/free. Search keywords: rug check, honeypot check, token risk, swap preflight, rug pull, scam token, and is this token safe.

Batch text-to-speech: synthesize up to 20 text items in a single call, standard voices only, for 501-2000 total characters, returns JSON with base64 WAV audio plus duration and sample rate per item. Use it to: batch-voice a longer set of messages, produce audio for a multi-section script or FAQ, generate several paragraph-length voice clips in one request without repeated calls. USDC on Base via x402.

Screen up to 10 Base tokens in a single paid call — each gets a 0-100 rug-probability score, risk level and top signals, sorted riskiest-first. Built for agents triaging a watchlist or portfolio without paying per token.

Futures market overview.

Options market data (skew, IV, volume).

List sports markets grouped by game

Fetch historical orderbook snapshots for a Limitless market

On-chain ClickHouse table schema introspection.

Fetch historical orderbook snapshots for a Predict.Fun market

Web search across crypto sources.