Blockchain And Crypto x402 offerings

Pay-per-call utility and data API for AI agents: tested no-KYC crypto payout-rails dataset (40+ rails, Sept 2026), live rail status checks, hashing/HMAC, encoding, JWT decode, crypto prices, URL fetch, web search. Eight routes $0.001-$0.02 USDC on Base via x402. No account, no API key.

Checks one address on Ethereum, Base, Arbitrum, Optimism, Polygon or BNB Smart Chain against the open verification registry and against the chain itself. For a proxy the answer is deliberately split …

Reads the transaction history of one wallet from a public block explorer index and groups it by kind of action. Classification follows the called contract and method, never the amount - a transfer to…

Pay the send-native execution fee (native coin transfer)

Pay the send-nft execution fee (ERC-721/1155 transfer)

Pay the send-token execution fee (ERC-20 transfer)

Current USD prices for any crypto asset: majors by ticker (BTC, ETH, SOL), anything else by CoinGecko id or chain + contract address — so long-tail meme tokens work too. Up to 25 assets per call with…

Fetch a block header by number, hash, or "latest" on Ethereum, Base, Arbitrum, Optimism, Polygon, or BNB Chain: timestamp, miner, gas used/limit, base fee, transaction count, size. Public JSON-RPC, n…

AGENT CREDIT REPORT: lender-grade credit passport for a Base wallet/agent. POST body: {"target":"0x…"}. Returns score 0-100, risk flags, Base vitals, ERC-8004 identity signal, KHOTEM payment history, indicative service-credit limit and sealed report. Not a cash loan — underwriting evidence for lenders and service-credit offers.

PRICE: token prices — Chainlink on-chain feeds on Base (eth/usdc/dai/link/sol) + Binance spot for any liquid ticker (bitcoin, ton, tron, bnb…). GET /api/price?ids=bitcoin,ethereum — cached 60s, zero-key oracle: same chain that settles your payment.

MED: agent wallet diagnostics — GET|POST {"wallet":"0x…"} → on-chain Base vitals (USDC/ETH/nonce, live RPC) + KHOTEM ledger history → diagnosis (EMPTY/RICH_IDLE/HEALTHY) + prescription with exact next steps.

RECEIPT: portable Ed25519-signed receipt for any ledger ref (txHash | sha256 | stamp) — proof-of-delivery you can show anyone. POST body: {"ref":"..."}.

DEAL OPEN: agent↔agent escrow — POST {"seller":"0x…","amount_usd":N,"terms":"…"} → deal room id. Fund: POST /api/deal/fund {deal,txHash} (on-chain verified). Public room: GET /api/deal/<id>. KHOTEM is guarantor; payout by operator hand after buyer confirms.

TESTNET ONLY: prove the KlearFlow recover_revenue x402 capability through the PayAI facilitator using test USDC.

Live snapshot of the most liquid carbon credits retirable on Base: the top 3 Klima Protocol carbon classes and the top 3 Carbonmark marketplace listings, with USDC-per-tonne prices and tonnes available. Additionally, the additional endpoints to quote and retire carbon are included; query those endpoints for further discovery, quotes, and retirements. Query /.well-known, /openapi, and /discover to get started.

Label a known EVM address from a curated, committed dataset: major stablecoin + token contracts (the USDC and USDG contracts of every EVM chain we settle on, USDC on Ethereum, USDT, DAI, WETH, WBTC), DEX routers (Uniswap, 1inch, 0x), canonical L1↔L2 bridges, large exchange hot/cold wallets, and burn/system addresses. Deterministic and offline - the provenance field states the dataset revision. Unknown addresses return {found:false}, not an error.

One paid call on kr-cm-kg.ai for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a product: its record of record; allooloo.io: the estate scale block), public-record only, with an EdDSA-signed receipt that resolves forever at https://kr-cm-kg.ai/x402/receipt/{nonce}. Doctrine: https://agentic-x402.ai/.

Live DeFi trading signal: action, confidence and one-line reasoning for ETH/ONDO/KAITO/DEGEN — refreshed under 5 minutes from live market data.

Live whale flow: USDC transfers ≥ $5M on Base with labeled counterparties — scanned continuously (freshness follows the RPC provider's limits; the response always states the block scanned to).

Cross-venue funding arbitrage signal from real-time 8h-equivalent funding rates on up to 6 venues (Binance, OKX, Bybit, KuCoin, Bitget, Hyperliquid). Returns the gross and net-of-fees spread between the best short venue and best long venue (gross_spread_bps, net_spread_bps after a 20 bps round-trip fee estimate), spread_8h_normalized, venues_count, per-venue rates with funding_interval_hours, annualized_pct, and an actionability label. All 17 assets. $0.02 USDC via x402.

Implied volatility surface for BTC and ETH from Deribit options (public API, no auth). Returns ATM IV (annualized %), IV rank and IV percentile from Kronos iv_history (daily cron), term structure (weekly/1m/3m ATM IV + contango/backwardation/flat shape label), 25-delta risk reversal (BS-approximated strikes), 10-delta wing IVs, max-pain strike across top-5 expiries, and a vol-regime label. Falls back to OKX if Deribit is unreachable. $0.03 USDC via x402.

Market-regime events for one asset from the last ~2 hours (volatility squeeze, breakout, funding-rate extreme, open-interest surge) plus current funding, open interest and a plain-language read. Built from OKX perpetuals and the Kronos regime engine; events are detected about every 15 minutes. Covers BTC/ETH/SOL/BNB/XRP/DOGE/ADA/AVAX/LINK/DOT/LTC/TRX/BCH/ATOM/NEAR/APT/HYPE. $0.02 USDC via x402.

Structured market digest for any of the 16 supported crypto assets. Deterministic composite from live signals: derivatives (funding, basis, OI), market regime, 30d realized volatility, fear-greed index, and ML forecast probability (BTC/ETH/SOL only). Single-call 'start here' bundle for autonomous agents. $0.02 USDC via x402. Live scored track record at /api/stats — measured on served predictions, not a backtest.

Real-time crypto derivatives signals for BTC/ETH/SOL/BNB/XRP/DOGE/ADA/AVAX/LINK/DOT/LTC/TRX/BCH/ATOM/NEAR/APT/HYPE-USD: perpetual futures funding rate (raw + annualized), next_funding_time, funding_interval_hours, open interest and 1h change, basis (perp vs index), funding-rate trend. Live data from OKX perpetuals via Kronos market_signals. Pay-per-call via x402.