Where proxycheck.io fits
proxycheck.io is a narrow integration option for network screening. Its value is a structured response for the IP you submit, with configurable lists and rules around that lookup. Keep identity and authentication logic in view when deciding whether an IP-only integration is enough.
Collection and outputs
The stable v3 API uses nested response categories and boolean values for detection types. The documentation also covers risk, confidence and detection history. Pin an explicit response contract in your application so a schema change cannot silently invert an action.
| Evidence area | Documented role |
|---|---|
| Network | Proxy, VPN, Tor, hosting and risk or confidence information |
| Device | IP classification rather than persistent device identity |
| Account context | IP detection and activity context for your own account logic |
Freshness and integration handling
Detection history and listing changes matter to caching. A stored answer can outlive the condition that produced it. Keep a lookup timestamp and make the recheck policy short enough for the action you are protecting.
Strengths
- Focused API and explicit v3 contract
- Daily plans for predictable connection checks
- Documented risk, confidence and detection-history fields
Limits and plan conditions
Daily query budgets differ from monthly identifications. New integrations should read the v3 schema rather than copy legacy yes/no string handling.
What to check in a pilot
Test parsing of clean, flagged, missing and failed responses. Exercise your timeout path and daily-budget exhaustion handling. Evaluate network lookup performance separately from the end-to-end signup completion rate.
Use the evaluation framework to record collection completeness, the reasons returned and the customer outcome. Compare the cost of your actual checks, not just the number of accounts in your database.
Consider an alternative when
The missing capability is persistent device continuity or a ready-made account event, rather than network enrichment. Compare a device-and-account platform and the collection it requires.
Compare the alternatives →Inspect a public demo or checker
Inspect the connection classification and detection context for an IP. Public lookup limits and production API subscription terms are separate.
Open the IP lookup ↗Sources and further reading
Product and technical sources reviewed October 21, 2026.
Inspect the integration before choosing.
Visit the vendor ↗FAQ
Should a new integration use API v2?
Read the current stable v3 documentation first. Legacy v2 examples may use a different structure and yes/no strings instead of booleans.
Does an IP lookup replace multi-accounting detection?
No. Several accounts need to be linked using account and device context; a shared IP alone is weak evidence.
How do I compare daily queries with another vendor’s quota?
Estimate peak daily checks as well as the monthly total. A daily cap can be reached even when a monthly average looks affordable.