DKIM · Free

DKIM Record Checker

Enter a sending domain and DKIM selector to retrieve and validate the public key published at selector._domainkey.domain.

DKIM check results

API Endpoint

GET /v1/tools/dkim/check?domain=example.com&selector=google

Interactive intelligence tool

Run the check, then ship the workflow

Use the browser tool for a fast answer, then move the same logic into scripts, monitoring, or product flows when it becomes repeatable.

Start with the live form

Enter a domain, URL, IP, email, or record and get a focused result without setup.

Review decision-ready signals

Outputs highlight statuses, risks, records, and next actions instead of raw provider noise.

Automate the winning workflow

Use the request and response examples to turn a one-off check into an API call or recipe.

Used by people at amazing companies

What this tool helps you decide

Each page is shaped around a practical operational question, not just a raw lookup.

Signal

See the current DNS, registration, security, pricing, or reputation evidence.

Context

Compare the result with related checks so the next move is easier to trust.

Action

Copy examples, open linked tools, or move into API documentation when you need scale.

Trust signals before you integrate

Transparent docs, authenticated requests, and visible reliability details make it easier to evaluate DomScan before you ship.

Service status API artifacts

OpenAPI, Swagger, Postman, CLI, SDK, and MCP links are one click away.

API keys Protected access

Authenticated endpoints use API keys with clear credit costs before you call them.

Free allowance Sign Up for Free

Start with 10,000 monthly credits and upgrade only when usage grows.

Active Example Request

Start from the curl and HTTP samples, then map the parameters into your application code.

Key Features

Selector-based lookup

Query the exact DKIM DNS name formed from the domain and selector.

Public key validation

Check the published DKIM record structure, version, key type, and key data.

Clear diagnostic evidence

See the queried DNS name, returned record, and any missing or invalid fields.

Example Request

Example Request http

GET /v1/tools/dkim/check?domain=example.com&selector=google

Example Response

Example Response json

{
  "domain": "example.com",
  "selector": "google",
  "dns_name": "google._domainkey.example.com",
  "exists": true,
  "valid": true,
  "key_type": "rsa",
  "key_size": 2048
}

Built from the same API surface

The browser experience previews DomScan's structured endpoints, so teams can validate a use case before writing code.

Open API docs All Tools

Frequently Asked Questions

Where can I find my DKIM selector?

Look for the s= value in an email's DKIM-Signature header or check the DKIM settings in your email service.

Does this checker validate an email's DKIM signature?

No. It validates the public key record for the supplied domain and selector. Verifying a message signature also requires the complete signed email.

Why is my DKIM record not found?

The selector may be incorrect, the record may not be published, or a recent DNS change may not yet be visible to the resolver used for the check.

Support