vendsdk.com
https://vendsdk.com/Public URL status, latency, and response header subset for uptime and health agents
Paid verification
How it worksNo sponsored paid call yet.
Pay this endpoint once from your own wallet (Base USDC, up to $1.00) and we call it and record what came back. Your wallet pays the listed recipient directly; Agent Tools never holds funds. Sponsored checks prove delivery; they do not count as demand.
Quality grade
How grading works- ✓ Answers a real HTTP 402 challenge
- ✓ Publishes a /.well-known/x402 descriptor
- ✓ Payment address on record
- ✓ Settlement network declared
- ✓ Price declared
x402 readiness
Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here A, 74.9/100), which weighs availability, payability and on-chain demand. How the two differ
| Valid payment requirements | 10/10 | Payment requirements carry a payee, a mainnet network and a price. |
| Live 402 challenge | 20/25 | Endpoint reachable; its 402 challenge was seen earlier (160 ms). |
| x402 version | n/a | x402 version not observed yet. |
| Signed descriptor | n/a | No x402 standard defines a signed descriptor. |
| Uptime (30 days) | 15/15 | 32/32 probes succeeded over 30 days (100%). |
| Resource declaration | 10/10 | Declares 19 paid resource(s). |
| Verified identity | 5/10 | Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control. |
| Freshness + modern flags | 5/5 | seen in a source within 7 days; declares x402. |
| Security declaration | n/a | Payment is the access control for an x402 resource. |
Compared with peers
Against 10,082 reachable x402 APIs in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.
- Readiness
- Higher than 75% of peers
- This listing 87 · peer median 78
- Latency
- Faster than 64% of peers
- This listing 160 ms · peer median 205 ms
Where it loses the most points, and how to win them back
- Live 402 challenge −5
— Answer the paid path with a valid 402 challenge.
Now: Endpoint reachable; its 402 challenge was seen earlier (160 ms).
- Verified identity −5
— Claim the listing and prove control of its domain.
Now: Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
Paid endpoints
19 resource(s) advertised by this origin. Each price below is that resource's own x402 price; the headline price is the range across them.
https://vendsdk.com/api/v/email-validate
Validate email format, disposable-domain heuristics, and live DNS MX records via DoH for outreach and lead-gen agents
https://vendsdk.com/api/v/ip-lookup
Live IP geolocation: country, city, org, and ASN for fraud and routing agents
https://vendsdk.com/api/v/weather
Current temperature and wind for a city from Open-Meteo (live forecast data)
https://vendsdk.com/api/v/crypto-prices
Live USD spot prices for crypto assets via CoinGecko simple price API
https://vendsdk.com/api/v/qr-code
Generate a PNG QR code URL for payment and onboarding payloads (upstream probed live)
https://vendsdk.com/api/v/dns-resolve
Resolve A and AAAA records for a public hostname via DNS-over-HTTPS (60s cache)
https://vendsdk.com/api/v/http-head
Public URL status, latency, and response header subset for uptime and health agents
https://vendsdk.com/api/v/bundle-infra
Single payment bundle: DNS A/AAAA, HTTP HEAD probe, and TLS certificate peek for agent infra workflows
https://vendsdk.com/api/v/bundle-outbound
One payment for lead-gen and fraud agents: email format/MX, IP geolocation, and SSRF-safe HTTP HEAD
https://vendsdk.com/api/v/tls-cert
TLS peer certificate subject, issuer, expiry, and authorization status for a public host
https://vendsdk.com/api/v/whois-lite
Domain registration status, registrar, dates, and nameservers via RDAP (lite fields only)
https://vendsdk.com/api/v/fx-rate
Live fiat FX rates (Frankfurter/ECB primary, open.er-api fallback) for cross-border agents
https://vendsdk.com/api/v/redirect-trace
Follow a public redirect chain with per-hop HTTP status (SSRF-safe) for security agents
https://vendsdk.com/api/v/dns-records
Resolve multiple DNS record types (A, AAAA, MX, TXT, NS, CNAME) in one call via DoH for deliverability and security agents
https://vendsdk.com/api/v/http-get
SSRF-safe public GET with status, headers, and size-capped JSON/text body for agent tool use
https://vendsdk.com/api/v/fetch-text
Fetch a public page and return plain text (HTML stripped) for research, RAG, and summarization agents
https://vendsdk.com/api/v/base-balance
Live Base mainnet ETH and USDC balances for an address — treasury and agent wallet checks
https://vendsdk.com/api/v/domain-intel
One payment: DNS + TLS cert + RDAP WHOIS + HTTP HEAD for brand protection and security agents
https://vendsdk.com/api/v/kronos-forecast
Research OHLCV candle forecast via Kronos-mini (financial K-line foundation model). Not financial advice. Symbols BTCUSDT/ETHUSDT
How to call
curl -sS -i -X GET https://vendsdk.com/ # expect HTTP 402 Payment Required (about $0.002/call)Listed in
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