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What Is My IP?IPv6 TestSpeed Test
DNS LookupDNS PropagationDNS Health CheckerSPF AnalyzerPTR LookupCAA RecordSRV RecordDNS TraceDNS PrivacyDANE / TLSADNSSEC CheckerSPF BuilderDKIM GeneratorZone DiffPTR Zone Generator
Subnet CalculatorCIDR Range ViewerVLSM CalculatorVLAN PlannerBandwidth CalcIPv6 Subnet CalcIP ↔ BinarySupernet CalcCIDR MergeCIDR to IP RangeCIDR SplitIPv4 → IPv6CIDR OverlapFree IP Space FinderDHCP CalculatorMTU Calculator
WHOIS LookupDomain Age CheckerSubdomain FinderIP GeolocationASN / BGP LookupIP Blacklist CheckReverse IP LookupMAC Address LookupBGP Prefix LookupRPKI / ROA CheckDomain Availability
Email InspectorDKIM CheckerEmail HeadersSMTP TestSMTP TLS CheckMX Health CheckEmail SecurityDMARC Generator
Temp MailSoon
Is It Down?SSL/TLS CheckerOpen Port CheckerOG Tag CheckerOCSP CheckerPing / LatencyHTTP InspectorRedirect ChainCSP AnalyzerTech Stack CheckerBetaTracerouteBetaHTTP/2 + HTTP/3robots.txt ViewerSSL Cert DecoderBanner GrabberWebSocket TesterCORS TesterDomain MonitoringHTTP TimingStructured DataPWA ManifestSEO Auditor
One-Time SecretHash GeneratorPassword StrengthSecurity.txtCT Log SearchAXFR Zone Test
HTTP Sec ScoreSoon
WebRTC Leak TestIP Reputation
JSON FormatterYAML FormatterBase64 / URL EncodeJWT DecoderRegex TesterUnix TimestampCron BuilderUUID / ULIDPunycode / IDNBase ConverterACL Generator
CSS Unit ConverterColor ToolkitGradient GeneratorcURL BuilderURL ParserURL Encoder/DecoderHTTP Status CodesBox Shadow GenFavicon GeneratorFlex & Gridrobots.txt Tester
Text CompareCase ConverterText CleanerText AnalyzerText TransformerList ToolsLorem GeneratorSlug Generator
Cloud VPC PlannerCloud IP RangeSecurity GroupsIAM AnalyzerK8s CIDR PlannerFirewall BuilderHCL FormatterEgress Cost CalcCloud DNS Zone
VM Cost EstimatorSoon
Proxmox Net ConfigVMware Port GroupHyper-V vSwitchVXLAN VNI PlannerKVM Net ConfigXCP-ng NetworkNSX-T Segment
Disposable Email DetectorPhone InspectorTor Exit NodeVPN/Proxy DetectDomain ReputationTyposquat DetectUsername SearchFavicon Hash
GitHub ActionsDockerfile Gendocker-composeArgoCD AppK8s Manifests
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VLANlab API Keys

2.38.7231679

VLANlab API

All 100+ tools are available as a JSON API. Free API keys unlock 1,000 requests per day with no account required.

Rate limits

No key (IP-based)
100 req / hour
Browser use only
Free API key
1,000 req / day
Scripts, pipelines, CI

Get a free API key

Enter your email to generate a key instantly. No password, no verification email. Save the key when it appears.

How to use your key

Pass the key via header (recommended) or query parameter:

Via header (recommended)
curl -H "X-API-Key: YOUR_KEY" "https://vlanlab.com/api/v1/dns?name=example.com"
Via query parameter
curl "https://vlanlab.com/api/v1/dns?name=example.com&key=YOUR_KEY"
Check usage
curl -H "X-API-Key: YOUR_KEY" "https://vlanlab.com/api/v1/keys/info"

Example endpoints

Every tool on VLANlab has a matching API endpoint. Full reference at vlanlab.com/api-docs.

/api/v1/dns?name=example.com&type=MXDNS lookup
/api/v1/whois?domain=example.comWHOIS lookup
/api/v1/ssl?host=example.comSSL certificate check
/api/v1/ip-geo?ip=8.8.8.8IP geolocation

Response format

Every endpoint returns the same JSON envelope:

{
  "ok": true,
  "success": true,
  "tool": "dns",
  "version": "1",
  "data": { ... }
}

// On error:
{
  "ok": false,
  "success": false,
  "error": { "code": "RATE_LIMIT_EXCEEDED", "message": "..." }
}