01402
Request an endpoint
Hit any tool URL. If unpaid, the server responds 402 Payment Required with a Payment-Required header carrying the exact USDC price, pay-to address, and network.
x402 micropayments · settled on Base
Agent-grade APIs. One USDC payment. Live settlement.
19 pay-per-call endpoints for agents and developers. No accounts, no API keys, no subscriptions — your wallet signature is the auth. Every endpoint is a plain GET, priced in USDC on eip155:8453, and failed calls never settle.
Recent settlements
live · refreshes every 15sNo paid calls observed by this edge isolate yet — the feed updates automatically as settlements land.
How it works
Pay → prove → call. Three steps, no signup.
02EIP-3009
Sign with your wallet
Your wallet (or agent) signs a USDC transferWithAuthorization on eip155:8453. No account creation, no API keys, no custody.
03200 OK
Retry with proof
Resend the request with the PAYMENT-SIGNATURE header. The facilitator verifies and settles on-chain; data returns in the same response.
● watch the packet ride the settlement path — request → signature → settled
x402 handshake — dns-resolve
GET /api/v/dns-resolve?host=base.org → 402 Payment Required
Payment-Required: { price: "$0.003", payTo: "0xc648…b697", network: "eip155:8453" }
wallet signs USDC transferWithAuthorization → facilitator verifies + settles on-chain
GET /api/v/dns-resolve?host=base.org + PAYMENT-SIGNATURE: <signed x402 payload> → 200 OK { "A": ["…"], "AAAA": ["…"] }
Tools & bundles
All endpoints are GET · paid via x402 · priced in USDC on Base — shown once here instead of on every card.
Bundles — one payment, one call, many signals
Infra bundle (DNS + HEAD + TLS)
Pay $0.01 →Single payment bundle: DNS A/AAAA, HTTP HEAD probe, and TLS certificate peek for agent infra workflows
GET /api/v/bundle-infra?host=example.com
x402 call — bundle-infraPay $0.01 →
GET /api/v/bundle-infra?host=example.com
PAYMENT-SIGNATURE: <signed x402 payload>
→ 200 OK · settles only on success
Outbound pack (email + IP + HEAD)
Pay $0.01 →One payment for lead-gen and fraud agents: email format/MX, IP geolocation, and SSRF-safe HTTP HEAD
GET /api/v/bundle-outbound?email=test%40gmail.com&ip=8.8.8.8&url=https%3A%2F%2Fexample.com
x402 call — bundle-outboundPay $0.01 →
GET /api/v/bundle-outbound?email=test%40gmail.com&ip=8.8.8.8&url=https%3A%2F%2Fexample.com
PAYMENT-SIGNATURE: <signed x402 payload>
→ 200 OK · settles only on success
Domain intel pack
Pay $0.015 →One payment: DNS + TLS cert + RDAP WHOIS + HTTP HEAD for brand protection and security agents
GET /api/v/domain-intel?host=example.com
x402 call — domain-intelPay $0.015 →
GET /api/v/domain-intel?host=example.com
PAYMENT-SIGNATURE: <signed x402 payload>
→ 200 OK · settles only on success
Premium
Kronos candle forecast
Pay $0.05 →Research OHLCV candle forecast via Kronos-mini (financial K-line foundation model). Not financial advice. Symbols BTCUSDT/ETHUSDT
GET /api/v/kronos-forecast?symbol=BTCUSDT&interval=1h&lookback=64&pred_len=6
x402 call — kronos-forecastPay $0.05 →
GET /api/v/kronos-forecast?symbol=BTCUSDT&interval=1h&lookback=64&pred_len=6
PAYMENT-SIGNATURE: <signed x402 payload>
→ 200 OK · settles only on success
Utility atoms — click a row for curl
| Tool | Params | Price | curl |
|---|---|---|---|
| email-validateValidate email format, disposable-domain heuristics, and live DNS MX records via DoH for outreach and lead-gen agents | $0.004 | curl ▾ | |
| ip-lookupLive IP geolocation: country, city, org, and ASN for fraud and routing agents | ip | $0.003 | curl ▾ |
| weatherCurrent temperature and wind for a city from Open-Meteo (live forecast data) | — | $0.003 | curl ▾ |
| crypto-pricesLive USD spot prices for crypto assets via CoinGecko simple price API | — | $0.005 | curl ▾ |
| qr-codeGenerate a PNG QR code URL for payment and onboarding payloads (upstream probed live) | data | $0.002 | curl ▾ |
| dns-resolveResolve A and AAAA records for a public hostname via DNS-over-HTTPS (60s cache) | host | $0.003 | curl ▾ |
| http-headPublic URL status, latency, and response header subset for uptime and health agents | url | $0.002 | curl ▾ |
| tls-certTLS peer certificate subject, issuer, expiry, and authorization status for a public host | host | $0.004 | curl ▾ |
| whois-liteDomain registration status, registrar, dates, and nameservers via RDAP (lite fields only) | domain | $0.008 | curl ▾ |
| fx-rateLive fiat FX rates (Frankfurter/ECB primary, open.er-api fallback) for cross-border agents | — | $0.003 | curl ▾ |
| redirect-traceFollow a public redirect chain with per-hop HTTP status (SSRF-safe) for security agents | url | $0.003 | curl ▾ |
| dns-recordsResolve multiple DNS record types (A, AAAA, MX, TXT, NS, CNAME) in one call via DoH for deliverability and security agents | host | $0.004 | curl ▾ |
| http-getSSRF-safe public GET with status, headers, and size-capped JSON/text body for agent tool use | url | $0.004 | curl ▾ |
| fetch-textFetch a public page and return plain text (HTML stripped) for research, RAG, and summarization agents | url | $0.005 | curl ▾ |
| base-balanceLive Base mainnet ETH and USDC balances for an address — treasury and agent wallet checks | address | $0.003 | curl ▾ |
On-chain proof, not promises
- Settlement address
- 0xc648…b697Basescan ↗
- Network
- eip155:8453
- Currency
- USDC
- Failed calls
- never settle — payment finalizes only when the handler succeeds
- Source
- github ↗
Questions, answered
▶What is x402?
x402 is an open payment protocol that revives the HTTP 402 Payment Required status code. Instead of accounts and API keys, each request carries a USDC micropayment on Base. Your wallet signature is the authentication — there is nothing to register and nothing to leak.
▶What happens if a call fails?
Handlers signal bad input or upstream failure with a ≥400 response, which cancels settlement before it reaches the facilitator. The USDC stays in your wallet — you are only ever charged for successful responses.
▶Do I need an account or API key?
No. Connect any EVM wallet with USDC on Base and sign per call — or let your agent sign programmatically with @x402/fetch. There are no subscriptions, no tiers, and no keys to rotate.
▶What is a bundle?
One payment, one request, many signals: a bundle route fans out to several upstream checks server-side (e.g. the Infra bundle returns DNS + HTTP HEAD + TLS certificate in a single call) and returns one aggregated JSON. Cheaper and faster than paying per atom.
▶How do agents discover these endpoints?
Machine-readable catalogs are published at /.well-known/agent-services.json, /.well-known/x402, /api/openapi.json, and /llms.txt, and services are indexed on the CDP Bazaar after their first settlement.
▶Is Kronos Forecast financial advice?
No. Kronos output is research-only — a probabilistic short-horizon candle forecast from an open-source model. Accuracy is not guaranteed; never trade on it alone. See the Research Disclaimer.
Discovery: agent-services.json, x402, OpenAPI, llms.txt
Kronos forecasts are research-only outputs from an open model; not investment advice. Research Disclaimer. Use is subject to our Terms, including Acceptable Use.