{"uid":"cap_dd0s6HTeKF3vURVF0h6jH","slug":"sitecheck-web-intel-vpn-proxy-detector-79a7b123","name":"SiteCheck Web Intel VPN/Proxy Detector","description":"Checks an IPv4 address against the public X4BNet list of commercial VPN provider address ranges (about 11,000 CIDR blocks, refreshed by the list's maintainer). Returns whether the address falls in a listed VPN range and which range. A miss does not prove a direct connection, and IPv6 is not covered.","url":"https://api.webintel-api.workers.dev/api/security/vpn-proxy-detector?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["ip"],"properties":{"ip":{"type":"string","description":"IPv4 address such as 2.26.157.10 (required)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"ip":"2.26.157.10","isVpn":true,"range":"2.26.157.0/24","source":"https://raw.githubusercontent.com/X4BNet/lists_vpn/main/output/vpn/ipv4.txt","checkedAt":"2026-10-23T09:38:33.929Z","rangesInList":10941}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_9j3ta5sdn8_hU3BZnHn2l","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks whether a given IPv4 address belongs to a known VPN or proxy network using public threat intelligence lists","exampleAgentPrompt":"Can you check if the IP address 2.26.157.10 is a VPN or proxy? I want to know if someone is masking their real location.","exampleUseCases":[{"title":"Fraud screening for new signups","prompt":"A new user just registered with IP 45.142.212.100 — can you check if that IP is a VPN or proxy so I can decide whether to flag the account?"},{"title":"Gating content by real location","prompt":"Before I serve this geo-restricted stream to the user at IP 104.28.96.45, check whether they're coming through a VPN."},{"title":"Security audit of recent logins","prompt":"We had a suspicious login from 185.220.101.33 — can you tell me if that IP is associated with any known VPN or proxy service?"}],"resultDescription":"Returns a JSON object with the queried IP, a boolean isVpn flag indicating VPN/proxy status, the matching CIDR range if found, the source threat intelligence list URL, the timestamp of the check, and the total number of IP ranges in the list.","failureModes":["Missing or malformed IP query parameter returns an error","IPv6 addresses are not supported (endpoint expects IPv4 only)","IP not found in any known VPN list returns isVpn: false but may not mean definitively clean","Payment failure results in no charge and no response data","Upstream list source temporarily unavailable may delay or fail the lookup"],"whenToPreferThis":"Choose this endpoint when you need a lightweight, pay-per-call VPN/proxy detection check with no API key or subscription required. It is ideal for low-volume, on-demand checks embedded in fraud detection, access control, or security workflows where cost predictability matters. Prefer it over heavier identity/fraud platforms when you only need VPN/proxy classification from public threat intelligence lists without requiring account management.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-25T12:31:25.109Z","isFirstParty":false,"canonicalSlug":"sitecheck-web-intel-vpn-proxy-detector-79a7b123"}