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Text-Trust Domain Similarity Checker
x402
Text-Trust Domain Similarity Checker is a paid API for AI agents from gateway.apiosk.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
Checks whether a given domain name visually resembles any domain in an allowlist, detecting potential typosquatting and phishing domains
Price / call$0.02
Success—
StatusUnknown
How this service works
Compare a domain against a caller allowlist using edit distance and visual confusable skeleton similarity.
Output
Returns a JSON object with ok status, the best matching domain from the allowlist along with a visual distance score (0 = identical), and a boolean 'suspicious' flag indicating whether the input domain is likely a lookalike or typosquatted version of a trusted domain.
Example use cases
Verify user-submitted links before email delivery
“Before we send out this marketing email with a link to 'amaz0n-deals.com', can you check if it visually resembles any of our approved brand domains like amazon.com, apple.com, or microsoft.com? I want to make sure we're not accidentally distributing something that looks like a phishing site.”
Screen new vendor domains in marketplace
“We just onboarded a vendor whose website is 'sh0pify-tools.net' — can you check if that domain looks suspiciously similar to any of the legitimate payment processors we whitelist, like shopify.com, stripe.com, and paypal.com? I'm worried it might be impersonating a trusted service.”
Flag risky domains in customer support tickets
“A customer just sent us a support ticket with a link to 'g00gle-analytics.io' where they claim to have found account issues. Can you compare that against our list of trusted internal domains — google.com, analytics.google.com, and our own company domain — and let me know if it looks like a lookalike or typosquatting attack?”
Technical details
Endpoint
POSThttps://gateway.apiosk.com/text-trust/check/domain-similarityWhen to prefer
Use this endpoint when you need to programmatically detect lookalike or typosquatted domains against a custom allowlist, especially in fraud prevention, phishing detection pipelines, or trust-and-safety workflows where you supply your own list of legitimate domains to compare against.
Side effects
- Empty or malformed domain string returns a validation error
- Allowlist array is empty or missing, leaving no reference domains to compare against
- Domain string contains unsupported characters or invalid TLD format
- Rate limiting or payment failure (x402) if USDC balance is insufficient
- Network timeout if the similarity computation exceeds server limits
Tags
x402
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