x402 Data API

Pay-per-call live crypto, DeFi, Polymarket and stock data plus web scraping for AI agents, from $0.002/call in USDC via x402. Coin, protocol, yield, pool, Polymarket and token-risk lookups, on-demand scraping, and 11 live datasets refreshed every 30 min. USDC on Base, Polygon, Arbitrum. MCP at /mcp.

Compliance and company data APIs for AI agents: OFAC sanctions screening, LEI (GLEIF) and SEC EDGAR company facts, WHOIS/RDAP and domain email-auth checks, a combined merchant check, ECB currency conversion, business days and US product recalls. Pay per call with x402 in USDC on Base or XRP on the XRP Ledger; no account or API key; every paid response carries an Ed25519-signed receipt.

Pay-per-call Korean data and checks for AI agents: Korean company due diligence report, company ID crosswalk (business no. / corp no. / DART code / English name), sanctions screening with Korean name variants and romanisation, Upbit/Bithumb risk events (delisting warnings, deposit/withdrawal halts), HWP to Markdown, business status (NTS), Korean business-day calendar, road-address normalisation, Korean law articles, FX and rates, DART filings and more. No account or API key: pay each call in USDC on Base via x402 v2. OpenAPI: https://x402.pokt-agent.com/openapi.json

Pay-per-call API returning crypto market microstructure and risk metrics as JSON (VPIN, Kyle lambda, Roll spread, CVD, Amihud illiquidity, gamma exposure), paid per request in USDC on Base with no API key. Standard metrics $0.05, market summary $0.25.

13 pay-per-call x402 tools for AI agents on Base (eip155:8453), USDC via CDP facilitator: live web search & extraction, company research & enrichment, counterparty risk screening, email deliverability, FX rates, LEI/company identity, invoice/IBAN validation, utilities — plus a free aggregated x402 discovery API. Machine-readable catalog at /.well-known/x402 and /openapi.json.

A broad production x402 API marketplace for autonomous agents: 250+ live data, research, finance, blockchain, scientific, legal, developer and reference endpoints with complete Bazaar schemas, OpenAPI and Streamable HTTP MCP discovery. No account or API key; supports USDC on Base, Polygon, Arbitrum and Solana, plus USDT and native SOL on Solana.

Risk profile for tokenized real world asset vaults on Base, covering admin and freeze controls, contract upgradeability, and secondary market exit liquidity across 14 vaults.

Lead generation, company data, SEO keywords and AI media APIs, pay per call in USDC on Base (x402)

Pay-per-call API suite for autonomous agents: 100+ x402-native endpoints (crypto prices, USD prices, fear & greed, crypto news, ERC-20 balances, honeypot rug-checks, token verdicts, repo trust verdicts, Superteam bounty radar, weather, url-to-text extraction, ai-chat, base gas, btc halving, market pulse, coin conversion, wallet profiles, dossiers). No signup, no API keys: agents get a 402 challenge, pay USDC on Base, retry with proof. Catalog price always equals challenge price (micro-USDC single source of truth). Use when an agent needs crypto market data, token safety checks, GitHub repo risk verdicts, bounty radar or web page extraction at $0.001-$0.10 per call; Day Pass $0.02 = 24h unlimited micro tier. Official MCP Registry listed (2 records).

Returns GPU spot prices collected from Vast.ai, RunPod, AWS EC2 Spot and Lambda Labs, with the cheapest option per GPU tier (H100, H200, A100, L40S, RTX 4090), a market signal and a short text summary. One paid endpoint at 0.05 USDC per call.

Pay-per-call web search API for AI agents. Returns ranked JSON results with title, URL, snippet and relevance score, plus an optional LLM-generated answer. A batch endpoint extracts page content from up to 5 URLs as clean markdown. Date, domain and exact-phrase filters. Billed in USDC on Base.

Look up, search, and name-match Japanese corporations against the official 国税庁 (National Tax Agency) corporate-number registry. x402-enabled for AI agents doing KYC, vendor reconciliation (名寄せ), invoice verification, or company research in Japan.

Pre-buy check for Solana tokens: verdict, risk score and reason codes (brand imitation, older same-ticker tokens, creator launch history, bundling). $0.01 per call. Also smart-money flow ($0.01) and creator reputation ($0.10). Informational only, not financial advice.

Pay-per-call API for UK property data by postcode: Land Registry sold prices, rental yield estimates, stamp duty, EPC ratings, crime statistics, flood risk, planning applications and council tax. Priced at $0.001 per call in USDC on Base.

Official-source public data from SEC, GLEIF, OFAC, USAspending, the Federal Register, NHTSA, the World Bank, NOAA/NWS, MET Norway, GeoNames, and the U.S. Census, plus retailer product-price evidence, timezone conversion, global place and reverse geocoding, web and domain intelligence, deterministic document and data transforms, developer analysis, and read-only Base utilities. All paid endpoints use POST. Exact USDC on Base via x402 and CDP, with JSON schemas, free samples, browser checkout, MCP, and A2A discovery.

Real-time data API for the AI industry: aggregated news, provider status, model pricing and benchmarks, historical series and security feeds. Free no-auth endpoints plus premium x402 endpoints at $0.02 per call in USDC on Base or Solana.

Turn a public webpage into validated typed JSON. Submit a URL and requested fields; OPX extracts supported values and settles payment only when required fields are delivered.

Pay-per-call market and on-chain data API over x402 (USDC on Base): multi-venue consensus crypto prices, DeFi TVL and stablecoin supply, DEX volume and protocol fees, yield pool history, and keyless read-only on-chain reads (balances, receipts, logs, eth_call) on Base, Ethereum, Arbitrum, Optimism and Polygon. No accounts, no API keys; every paid response is normalised and falls back to a second data provider.

Market where AI agents sell what they measured: knowledge units (benchmarks, failure post-mortems, working parameters) reviewed against their evidence, and versioned, signed datasets. Each paid read is one x402 payment in USDC; search, listings and free reads need no payment or key. Remote MCP server at https://witan.markets/mcp, OpenAPI at https://witan.markets/openapi.json, Python and JS SDKs. Public beta on Base Sepolia (test USDC).

A human-reviewed Grants.gov research and screening API from Genuine Good News, with current-search normalization, sourced detail, transparent fit signals, decision-ready briefs, deterministic preflight checks, and a 30-day agent pass.

Returns large on-chain transfers on Base and Ethereum above a chosen USD threshold, over a lookback window of up to 24 hours, with wallet labels and explorer links.

Pay-per-call wrapper over The GDELT Project's public news API: full-text search across global media (/search, $0.005) and a merged coverage-volume plus average-tone time series for any query (/timeline, $0.02), returned as normalized JSON.

Pay-per-call data tools for AI agents, built on official public data: SEC EDGAR filing sections, 8-K events, financials, insider trades and company red-flag dossiers; OFAC sanctions screening and counterparty checks; web page to Markdown and web search; Treasury/BLS/Fed economic indicators; Base token and wallet risk checks. 40+ tools over HTTP and MCP, x402 v2, USDC on Base. Free real-output samples for every paid tool at /api/v1/samples.