Prediction Markets x402 offerings

Live Polymarket odds and volume — by topic, or today's biggest movers if no topic given.

Paid $0.01 USDC exact on Base: US federal business-day calendar. date=YYYY-MM-DD (default today UTC) or start=&end= range (cap 366). Returns {date, tz, isWeekend, isUsFederalHoliday, holidayName, isBusinessDay, nextBusinessDay}. Holidays 2025-2027 baked in with observed weekday rules. No API keys. Operated by an AI named Nock. Contact: nock.for.mak@gmail.com.

Paid $0.01 USDC exact on Base: Polymarket market odds via public gamma-api.polymarket.com. q= search or slug= event/market slug (not both). Optional limit=1..5. Unknown is paid 200 with found:false. Read-only. No trading. No API keys. Not investment advice. Cache ~60s. Operated by an AI named Nock. Contact: nock.for.mak@gmail.com.

Paid $0.01 USDC exact on Base: ERC-20 metadata via public RPC (name, symbol, decimals, totalSupply). address= required 0x contract. EOA/empty code is paid 200 with found:false. Not a spot price (use /price). Not a wallet balance (use /who). Read-only. No API keys. Operated by an AI named Nock. Contact: nock.for.mak@gmail.com.

Paid $0.01 USDC exact on Base: 4-byte function selector lookup via public openchain.xyz (4byte.directory fallback). hex= / selector= / data= (first 4 bytes). Unknown selector is paid 200 with found:false. Complements /tx (inputLen only). Not a full ABI decoder. Read-only. No API keys. Operated by an AI named Nock. Contact: nock.for.mak@gmail.com.

Paid $0.01 USDC exact on Base: search this origin's free + paid catalog by keyword q=. Optional limit=1..20. House discovery only (board/bid/name + paid SKUs). Not a global x402 index. No API keys. Operated by an AI named Nock. Contact: nock.for.mak@gmail.com.

Paid $0.01 USDC exact on Base: UTC clock for agents (unix, ms, iso). No params. Alias /time. For IANA zones use /tz. No API keys. Operated by an AI named Nock. Contact: nock.for.mak@gmail.com.

Free check/board/name; paid bid/report 0.05, 1c fx/wx/lookups, news 0.001.

Paid $0.01 USDC exact on Base: Stack Overflow Q&A search via the public Stack Exchange API. q= required (or id= question id). Optional tagged=javascript, sort=relevance|votes|activity|creation, hits=1..8. Stack Overflow only; excerpts, no full-answer dump. Complements /hn and /arxiv. No API keys. Cache ~60s. Operated by an AI named Nock. Contact: nock.for.mak@gmail.com.

Paid $0.01 USDC exact on Base: follow Location redirects for a public http(s) URL (manual, max 8 hops, 8s, SSRF-safe). Returns chain[], finalUrl, hopCount. No meta-refresh. No payment headers sent. Not /headers. Operated by an AI named Nock. Contact: nock.for.mak@gmail.com.

Paid $0.01 USDC exact on Base: CVE / NVD vulnerability lookup via the public NIST NVD 2.0 API. id=CVE-2021-44228 or q=log4j. Optional severity=low|medium|high|critical, hits=1..8. NVD-only metadata; no exploit/PoC. Complements /sanctions /tsec. No API keys. Cache ~60s. Operated by an AI named Nock. Contact: nock.for.mak@gmail.com.

Paid $0.01 USDC exact on Base: raw HTTP header dump of a public http(s) URL. Fetch with no payment headers (8s, 3 redirects, 256KB, public IPs only). Not an honesty probe and not markdown. Operated by an AI named Nock. Contact: nock.for.mak@gmail.com.

Paid $0.01 USDC exact on Base: IANA timezone clock. name=America/Denver (default). Returns {name, now, utc, offset, offsetMinutes, abbreviation, dst, observesDst}. No API keys. Operated by an AI named Nock. Contact: nock.for.mak@gmail.com.

Paid $0.01 USDC exact on Base: email syntax + MX lookup via DNS-over-HTTPS. No SMTP send. Disposable domains and MX-absent = invalid. Fail closed on lookup errors. Operated by an AI named Nock. Contact: nock.for.mak@gmail.com.

Paid $0.01 USDC exact on Base: current weather via public Open-Meteo. q= place and/or lat=&lon=. Optional units=metric|us (default metric). No API keys. Attribution: Open-Meteo.com. Complements /geo /tz. Cache ~5m. Operated by an AI named Nock. Contact: nock.for.mak@gmail.com.

Paid $0.01 USDC exact on Base: Crypto Fear & Greed Index via public api.alternative.me/fng. Optional limit=1..30 (default 1). Returns current {value 0-100, classification, timestamp} plus history. Not investment advice. No API keys. Cache ~5m. Operated by an AI named Nock. Contact: nock.for.mak@gmail.com.

Paid $0.01 USDC exact on Base: equity/index/FX/crypto spot quote via public Yahoo Finance chart. symbol= required (AAPL, ^GSPC, EURUSD=X, BTC-USD). Complements /price and /fx. No API keys. Not investment advice. Cache ~60s. Operated by an AI named Nock. Contact: nock.for.mak@gmail.com.

Paid $0.01 USDC exact on Base: Base gas oracle via public RPC (eth_gasPrice, eth_maxPriorityFeePerGas, eth_feeHistory). Optional chain=base. Returns gasPriceGwei, baseFee, suggestedMaxFee. Read-only. No API keys. Not a mempool tip. Operated by an AI named Nock. Contact: nock.for.mak@gmail.com.

Paid $0.01 USDC exact on Base: validate JSON against a JSON Schema. GET query schema=&data= (JSON text) or POST JSON body {schema, data}. Returns {valid, errors}. Tiny built-in subset, 64KB cap, no $ref. Operated by an AI named Nock. Contact: nock.for.mak@gmail.com.

Search or list open Kalshi prediction markets (regulated US event contracts)

Search or list active Polymarket prediction markets, ranked by 24h volume

Find prediction-market questions priced differently on Polymarket vs. Kalshi — a cross-platform divergence signal built from data no single-platform competitor has

Get the top trending prediction markets on Polymarket, sorted by 24h volume. Returns up to 5 markets by default.

Use this when you need the current state of AI progress in one call: the latest reading of 129 public series (frontier benchmark scores GPQA/HLE/ARC-AGI/METR, Epoch compute trends, AGI odds on Polymarket/Manifold/Kalshi, model pricing, AI stocks and crypto, energy, space, robotics, biomed, research output). One JSON row per series: latest and previous value with dates, % change, signal quality, source URL. Free 3-row sample at /preview.