All projects on Base

For an investment theme (e.g. HBM, 유리기판, 원전, robotics), the Korean listed companies linked to it with evidence graded confirmed / circumstantial / expectation: DART filing snippets with receipt numbers, regional revenue, earnings and order headlines, and price context since the signal. Separates real revenue from theme hype.

Deterministic prompt-injection firewall and honeypot scrubber for AI agents. Sanitizes untrusted text and blocks detected wallet-draining commands before context ingestion.

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.

Historical price series for an asset slug (capped data points).

Domain registration status, registrar, dates, and nameservers via RDAP (lite fields only)

Independent second opinion on an x402 resource: compares the seller's Bazaar listing and x402 manifest against the live observed price, payTo, network, method and paywall. Field-level evidence with source, timestamp and hash, plus a signed receipt. / Segunda opinión independiente sobre un recurso x402: compara la ficha pública del Bazaar y el manifiesto x402 del vendedor con el precio, destino, re

Get structured metadata for any public web page in one call: title, meta description, canonical URL, Open Graph and Twitter card tags, favicons, JSON-LD schema types, language and the heading outline. Use it to build link previews and social cards, classify or dedupe URLs, and run SEO and AI-readability audits - far cheaper than fetching and parsing the whole page.

Call before buying or swapping into any Base token. Simulates a real buy and sell in its deepest pool (honeypot, buy/sell tax, round-trip loss), reads owner powers (mint, pause, blacklist, tax, proxy), liquidity, age and holder concentration. Returns SAFE / CAUTION / DANGER / SCAM with every risk explained. Failed checks are not charged.

Live prices with 5-minute, 1-hour, 4-hour and 24-hour change and 24-hour volume for the top 50 crypto coins, refreshed every minute.

Rule-based multi-label text classification over a fixed taxonomy (urgency, financial_promise, credential_request, crypto_mention, cta, legal_offer, medical_claim, seo_spam, url_shortener, press_release, question, has_contact). Deterministic - identical text always yields identical labels.

Smart contract security check before you approve or pay an address: reads the bytecode, behind proxies too, for privileged functions (mint, pause, blacklist, upgrade), dangerous opcodes and protocol type, and checks whether a single key holds those powers. Adds OFAC SDN screening, who funded the address, sybil-filtered ERC-8004 reputation for agents and a 0-100 score with proceed / hold / block. S

0-100 safety score with components (protocol trust, TVL depth, audits, track record), observed and risk-adjusted APR, and whether STB's Auto-Defense would exit — for every vetted stablecoin vault, or one by ?venue=<id|pool address>.

Payee screening before an AI agent pays an x402 endpoint: sanctions screening and AML screening of the payTo address, plus OceanAlt's daily ledger of the public x402 directory: how many hosts share this payee, whether the route is listed with the same payee, and whether its payout address changed recently. Returns allow / review / decline with reasons.

Verify factual claims and check whether cited sources support them. Fact-check statistics, dates and source attributions in agent research and reports against web evidence, preserving reporting periods, units and population groups. Returns a verdict, explanation and cited sources; /v2/verify links evidence to source IDs. 0.20 USDC via x402 v2 on Base. Model-assessed; no signup or API key.

Use when an agent needs the best live price for a stock across venues before trading. For 1-10 tickers: perp mark and mid on trade.xyz (Hyperliquid), Aster, Lighter and OKX, xStocks and Ondo token prices per share, last US close, the session reference price, gap % vs it, cross-venue spread, best bid/ask and freshness. Unpaid calls get 402; bad or unknown tickers get 400/404 before any charge. Erro

One-call market snapshot for a daily briefing or a pre-trade check: BTC/ETH/SOL spot with 24h change, the crypto fear & greed index, and SPY/QQQ/DIA/IWM quotes. Cheaper than the three parts bought separately. Each source reports its own status; if every source fails the call returns 503 and is not charged. JSON.

Central bank interest rate decisions, one card per bank: Bank of England, US Fed, ECB, Bank of Japan, Australia, Canada, Switzerland, Norway, Sweden, Mexico, Bank of Korea, Turkey, India, South Africa, China, Indonesia, Ethiopia, Russia, Egypt, Iran, Brazil. Each card: hike/hold/cut, policy rate, change in bps, vote and dissent where published, next decision date, official source_url. Ids in /cata

Company intelligence lookup: resolve a US-listed company ticker through the SEC EDGAR company ticker dataset. Returns CIK, ticker, and registrant name for company research, SEC filing discovery, and equity due diligence.

Is this x402 endpoint safe to pay? Call it before your AI agent pays an endpoint it has not used before. Returns a go / caution / no_go verdict, the recommended payment option (network and amount) and the reasons (payment would fail, payout address on the OFAC sanctions list, over your budget, price above advertised, not HTTPS, unknown token). Never pays the endpoint. Cached 10 min. Bulk: 1000 cre

A stateful, multi-chain spending session for AI agents. One session enforces a hard USDC budget cap across every tool call, with a verifiable receipt and running ledger for each payment — not a one-shot budget check, but persistent spend governance with a full audit trail. The gateway enforces the cap for the paying wallet on Stacks and Base. USDC on Base (standard x402) or Stellar (via the AgentP

Find public dataset catalog entries in GovData (Germany) or open.bydata (Bavaria): titles, short descriptions, publisher, source/identity links, source modification date, per-resource license references and access/download links. One catalog GET, up to 10 datasets; never downloads the actual source files. No API key needed.

Parse and normalize postal addresses into structured components. Returns address number, street, city, state, ZIP, and USPS-formatted output. Postal address parsing and normalization. Sub-second. x402-native.

Amazon product search and pricing API for AI agents: JSON product details by ASIN, keyword search results, offers and bestsellers. Supports Amazon marketplace domains for ecommerce research, with titles, prices, ratings and availability when available. Provided by FastAF Amazon Product Data. Price: $0.001000 USDC per successful call.

SSRF-safe public GET with status, headers, and size-capped JSON/text body for agent tool use

Is your x402 service still listed? The Bazaar removes resources that go without settlement, and no one tells you. We keep a daily snapshot of the whole catalog since June, so we can show whether your domain is present today, how its resource count moved day by day, and how long since each resource was last paid for. In our latest scan 620 of 2,147 domains are no longer present. Measured from our o

Transcribe text to Unicode braille (grade-1 / uncontracted English braille), with capital and number signs. Characters with no grade-1 representation are clean 400s.

PolySignal paper-trading performance summary, including win rate, ROI, PnL, open trades, settled trades, and tag-level breakdowns.

Classify a caller-supplied operation claim against caller-supplied evidence under deterministic rules and return a machine-readable handoff receipt. Use this when an orchestrator needs a consistent completion state before accepting an agent's work. VERIFIED_COMPLETE means the submitted evidence supports the submitted claim; QSL does not independently observe the underlying real-world action.

Search Bluesky and Hacker News for every query; for a single public tag, also search Mastodon's anonymous tag timeline. Mastodon is not applicable to phrase search. A failure from any source promised for that query returns an uncharged error, never a partial paid result. Successful results include author, text, time, engagement and link. Twitter/X and TikTok are deliberately out of scope because t

Check a Ethereum wallet's ERC-20 approvals: allowances for 8 major tokens (USDC, USDT, WETH, DAI...) to common spenders (Permit2, Uniswap Universal Router v4, Uniswap Universal Router, Uniswap SwapRouter02...); flags unlimited approvals.