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ZoomEye can help you find candidate internet-facing assets associated with identifiers your organization controls. Treat its results as leads—not a complete inventory, proof of ownership, or proof that a system is vulnerable. A useful first pass pairs each result with its search evidence, verifies ownership against your own records, and routes unexplained exposures for review.
What ZoomEye can—and cannot—tell you
ZoomEye is an internet asset search service with browser and API access. Its search documentation describes coverage of IPv4 and IPv6 devices and websites, with keyword matching across protocol and web data. Depending on the query and the fields your account can access, results may identify an IP address, domain, URL, hostname, port, service, operating system, or page title. ZoomEye’s product site and its API reference describe the service and available search fields.
A match does not establish that an asset belongs to you, is currently reachable, or is exploitable. A hostname, certificate, IP allocation, or service banner can point to a third party, a hosting provider, or stale data. ZoomEye’s asset-search documentation also does not establish that a search is a vulnerability scan. Keep those questions separate and validate findings with your organization’s authoritative records.
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Write down which identifiers you are authorized to assess before running searches. Start with the organization’s known domains and public IP addresses or ranges, then account for subsidiaries and cloud or hosting relationships only when they are in scope. Search only identifiers you are authorized to assess; a result that happens to mention your organization is not permission to investigate an unrelated system.
This scope is a starting point, not a claim that every related asset will be found. The UK National Cyber Security Centre (NCSC) explains that external attack-surface management (EASM) discovery can combine technical and non-technical sources, and that cloud-provider connectors can improve coverage. A search engine is one outside-in input, not a substitute for internal cloud, DNS, or asset records. NCSC EASM buyer guidance describes those broader discovery considerations.
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Search known identifiers, then refine queries
Begin with identifiers you can verify
Search your known domains and public IPs first. Where useful and available, search organization or network identifiers as additional leads. Record each query exactly as run, including its date and the identifier or field searched. This makes later validation and repeat comparisons possible.
Use the documented query operators carefully
The ZoomEye API reference documents = for keyword matching and == for exact matching. It also describes combining conditions with &&, ||, !=, and parentheses. Matching is generally case-insensitive and segmented; exact matching has stricter case behavior. Consult the current official query reference for syntax and field names before relying on a query, because fields and permissions can differ by account and documentation can change.
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Refine searches to answer a specific ownership question rather than treating a broad match as a verdict. For example, a domain-related result may help identify a candidate host, but the domain match alone does not prove which team or provider operates it. Do not infer vulnerability from a port, service name, banner, or operating-system field.
Capture evidence for each candidate
Keep a working inventory that preserves what ZoomEye actually returned alongside your own verification. The API reference lists fields such as IP, domain, URL, hostname, operating system, port, service, and page title; some fields may require a particular permission level. Do not assume every account exposes every field.
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- Search evidence: query, date searched, result identifier, and the fields returned.
- Candidate details: relevant domain or IP, hostname, port, service, and any useful title or operating-system information.
- Verification: ownership status, the authoritative record checked, and the person or team responsible for confirming it.
- Disposition: review priority, next action, and the date the item was resolved or revisited.
Keep observed values distinct from conclusions. A banner or inferred operating system is a clue to validate, not confirmed inventory truth.
Validate ownership and route discrepancies
Compare each candidate with records your organization controls. Useful checks include authoritative DNS, cloud-account inventories, IP or provider allocations, certificates, a configuration management database (CMDB) or asset register, and confirmation from the responsible team. NCSC’s EASM guidance notes the value of combining technical sources such as public DNS and certificate data with non-technical sources; provider connectors can add coverage where available.
Use a consistent classification so that uncertainty does not disappear into a spreadsheet:
- Confirmed owned: an authoritative internal record or responsible team confirms ownership.
- Likely owned, pending confirmation: evidence points to your organization, but ownership is not yet verified.
- Third-party or hosted: the result appears to involve a provider or another organization; identify the relationship and accountable contact before treating it as yours.
- Unknown: available evidence does not resolve ownership; assign an owner and a follow-up date.
For confirmed exposures, assign an internal owner and a concrete next action. Prioritize review according to business importance, unexpected internet exposure, sensitive service type, and separate vulnerability evidence where available. A listed port by itself does not show that the service is exploitable, and ZoomEye search results alone do not establish that an active vulnerability assessment occurred.
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Use the API without exposing credentials or wasting quota
ZoomEye’s current agent documentation describes API-key authentication in the API-KEY request header and identifies POST /v2/search as the asset-search endpoint. The API reference gives the base URL as https://api.zoomeye.ai and documents POST /v2/userinfo for user and quota information. Check the official agent documentation for current endpoint, authentication, and operational guidance before automating searches.
- Keep the API key private. Do not put a real key in source code, prompts, URLs, screenshots, or client-side JavaScript.
- Check both the HTTP status and the response code, and review account or quota state before a large job.
- Do not repeatedly send an unchanged request after authentication, permission, malformed-query, or exhausted-quota errors. Correct the underlying issue first.
- For transient failures, use exponential backoff rather than rapid retries.
Example quota values shown in API documentation are sample response data, not a statement of your current allowance. Check your own account and current documentation for applicable limits.
Repeat the inventory and interpret changes
Save dated snapshots and track newly seen, removed, confirmed, and unresolved candidates over time. A difference between snapshots is a prompt to investigate, not automatically evidence that an asset was created, retired, or compromised: search coverage and observed data may change too.
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NCSC lists history and trend analysis among EASM capability categories. That does not establish which historical tracking features are included in a particular ZoomEye account or plan. If a reliable change history is important, confirm the feature and its limits in the product documentation and preserve your own dated records.
When a broader EASM capability may be needed
Asset discovery is one part of attack-surface management. NCSC’s guidance treats service identification, web security, vulnerability assessment, and history or trends as distinct capability areas. A search result should not be described as completing those other activities unless you have separate evidence that it did.
When assessing whether a managed EASM product is a better fit, compare discovery sources and coverage, cloud-provider connectors, refresh cadence and change history, exposed-service and web-configuration detail, vulnerability-assessment capabilities, API and integration support, permissions and account costs, and the workflow for ownership verification. Microsoft Defender EASM documentation, for example, describes continuous discovery and mapping of an organization’s digital attack surface. That makes it an example to evaluate, not a verified like-for-like comparison or endorsement of either service.
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