Domain Similarity API

What you get

Find domains similar to a given domain based on name patterns and keywords.

SynchronousRESTMCPSDK

Choose this product when

Who it is for

Use bounded passive checks to enrich triage and investigation, not to replace authorized testing or human review.

Choose this product when

Choose this for name, text, keyboard, and homoglyph similarity. It does not compare website meaning or visual design.

What you get

Find domains similar to a given domain based on name patterns and keywords.

Endpoints

Review the supported operations, inputs, outputs, execution modes, and response limits before integrating.

GET /v1/similarity View API reference

Credits and authentication

2 Authentication required. Check the operation reference for the exact cost and any per-item pricing.

Example operation

Use documented operations to collect, assess, enrich, verify, compare, protect, or monitor public evidence.

GET /v1/similarity

Query Parameters

Parameter	Type	required
domain1	string	required
domain2	string	required

Response Fields

Field	Type
`domain1`	string
`domain2`	string
`overall_similarity`	number
`risk_level`	string
`analysis`	object
`analysis.levenshtein_distance`	integer
`analysis.levenshtein_similarity`	number
`analysis.jaro_winkler_similarity`	number
`analysis.visual_similarity`	number
`analysis.keyboard_distance`	number
`analysis.common_prefix_length`	integer
`analysis.common_suffix_length`	integer
`matching_methods[]`	string[]
`is_potential_typosquat`	boolean
`checked_at`	string
`meta`	object

Example Request

curl -H "X-API-Key: $DOMSCAN_API_KEY" "https://domscan.net/v1/similarity?domain1=example.com&domain2=example.org"

Example Response

{
  "domain1": "example.com",
  "domain2": "example.org",
  "overall_similarity": 0.5,
  "risk_level": "none",
  "analysis": {
    "levenshtein_distance": 1,
    "levenshtein_similarity": 0.5,
    "jaro_winkler_similarity": 0.5,
    "visual_similarity": 0.5,
    "keyboard_distance": 0.5,
    "common_prefix_length": 1,
    "common_suffix_length": 1
  },
  "matching_methods": [
    "example"
  ],
  "is_potential_typosquat": false,
  "checked_at": "2026-08-27T12:00:00Z",
  "meta": {}
}

Limits and evidence boundaries

Heuristic signals are useful for ranking or review but are not authoritative proof.

Confidence describes evidence strength for the reported observation, not certainty about the real-world entity.

An absence or unknown result does not prove that an identifier can be claimed or registered.

Reviewed 2026-08-22

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Frequently asked questions

Where can I find the Domain Similarity request and response reference?

Use the API reference for Domain Similarity to review parameters, response fields, examples, status codes, and supported operation modes.

How should I interpret unknown or incomplete results from Domain Similarity?

Unknown or partial results mean that the requested evidence could not be fully determined. Keep the result state, confidence, freshness, and limitations in downstream decisions.

How is Domain Similarity priced?

Pricing depends on the operation and execution mode. Check the endpoint reference for the current credit cost, authentication requirement, and per-item rules.