Live
Service status
Check live service health and documented failure responses before you integrate.
Category
Security & Email
Endpoints
2
Key Features
8
Frequently Asked Questions
4
Used by people at amazing companies
Trust signals before you integrate
Transparent docs, authenticated requests, and visible reliability details make it easier to evaluate DomScan before you ship.
OpenAPI
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.
10,000
Free allowance
Start with 10,000 monthly credits and upgrade only when usage grows.
What this API helps you ship
Use this page as a production brief: endpoints, examples, response shape, and the workflow pieces needed to plug DomScan into your own product.
Embed domain checks, DNS intelligence, risk signals, or enrichment into onboarding, search, and internal tools.
Replace repeated manual lookups with scheduled jobs, alerting, and reproducible investigation steps.
Use predictable fields, documented status codes, and credit costs instead of scraping provider pages.
Feed agents, dashboards, SOAR playbooks, and CRMs through OpenAPI, SDK, Postman, or MCP.
Integration workflow
A simple path from first request to repeatable production usage.
Authenticate once
Send your API key with the documented header and keep requests consistent across services.
Query with examples
Start from the curl and HTTP samples, then map the parameters into your application code.
Operate and monitor
Use status codes, credit costs, and response fields to build retries, logs, and alerts.
Developer kit
Jump from this page into machine-readable docs, request collections, SDKs, or agent tooling.
OpenAPI schema
Generate clients or inspect every request and response shape.
Postman collectionImport ready-made requests for manual testing and team handoff.
SDKs and CLIUse maintained packages and command-line workflows instead of writing boilerplate.
MCP integrationExpose domain intelligence to AI agents and internal assistant workflows.
Parameters and response map
Scan the inputs, output fields, and status codes before wiring the endpoint into your client.
Parameter
domaindomainsselectors
Example Response
domainspfspf.recordspf.lookup_estimatespf.includesspf.redirectspf.macros_presentspf.macro_referencesspf.lookup_walk_countspf.lookup_limit_exceededspf.walkspf.walk_errors
HTTP Status Codes
200400401402429
Endpoints
GET
/v1/email-auth
domain
POST
/v1/email-auth/bulk
domainsselectors
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
SPF Validation
Parse and validate Sender Policy Framework records.
DMARC Analysis
Check DMARC policy configuration and reporting.
DKIM Verification
Validate DomainKeys Identified Mail signatures.
Security Grade
Get an overall A-F grade for email security posture.
Actionable Recommendations
Receive specific fixes for misconfigurations.
Multiple Selector Support
Check common DKIM selectors automatically.
Policy Explanation
Understand what each policy means in plain English.
Spoofing Risk Assessment
Evaluate vulnerability to email spoofing attacks.
Example Request
curl -H "X-API-Key: $DOMSCAN_API_KEY" "https://domscan.net/v1/email-auth?domain=google.com"Example Response
{
"domain": "google.com",
"spf": {
"record": "v=spf1 include:_spf.google.com ~all",
"lookup_estimate": 1,
"includes": [
"_spf.google.com"
],
"redirect": null,
"macros_present": false,
"macro_references": [],
"lookup_walk_count": 1,
"lookup_limit_exceeded": false,
"walk": [
{
"domain": "google.com",
"depth": 0,
"record": "v=spf1 include:_spf.google.com ~all",
"mechanisms": [
"include:_spf.google.com",
"~all"
],
"includes": [
"_spf.google.com"
],
"redirect": null,
"direct_lookup_count": 1,
"total_lookup_count": 1,
"macros_present": false,
"macro_references": [],
"multiple_records": 1
}
],
"walk_errors": [],
"lookup_tree": {
"root_domain": "google.com",
"node_count": 1,
"max_depth": 0,
"cycles_detected": [],
"nodes": [
{
"domain": "google.com",
"depth": 0,
"status": "present",
"direct_lookup_count": 1,
"total_lookup_count": 1,
"includes": [
"_spf.google.com"
],
"redirect": null,
"mechanisms": [
"include:_spf.google.com",
"~all"
],
"errors": []
}
],
"edges": [
{
"from": "google.com",
"to": "_spf.google.com",
"type": "include"
}
]
}
},
"dkim": [
{
"selector": "google",
"record": "v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8A",
"key_type": "rsa",
"key_size": 2048
}
],
"dkim_audit": {
"selectors_checked": [
"google",
"default",
"selector1",
"selector2"
],
"selectors_found": [
{
"selector": "google",
"dns_name": "google._domainkey.google.com",
"record": "v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8A",
"record_type": "TXT",
"cname_targets": [],
"provider_hint": "Google Workspace",
"key_type": "rsa",
"key_size": 2048,
"valid": true,
"revoked": false,
"weak": false,
"hash_algorithms": [
"sha256"
],
"service_type": "email",
"flags": [
"s"
],
"issues": []
}
],
"total_found": 1,
"providers_detected": [
"Google Workspace"
],
"valid_selector_count": 1,
"weak_selector_count": 0,
"revoked_selector_count": 0
},
"bimi": {
"exists": true,
"record": "v=BIMI1; l=https://example.com/logo.svg; a=https://example.com/vmc.pem",
"valid": true,
"logo_url": "https://example.com/logo.svg",
"authority_url": "https://example.com/vmc.pem",
"logo_fetch_ok": true,
"logo_http_status": 200,
"logo_content_type": "image/svg+xml",
"logo_bytes": 2048,
"logo_svg_detected": true,
"vmc_present": true,
"vmc_fetched": true,
"vmc_http_status": 200,
"vmc_content_type": "application/x-pem-file",
"vmc_certificate_valid": true,
"vmc_subject": "/CN=Example Inc VMC",
"vmc_issuer": "/CN=Example Issuer",
"vmc_not_before": "2026-01-01T00:00:00Z",
"vmc_not_after": "2027-01-01T00:00:00Z",
"vmc_days_to_expiry": 258,
"vmc_fingerprint_sha256": "AA:BB:CC:DD",
"vmc_san_domains": [
"google.com"
],
"errors": []
},
"dmarc": {
"record": "v=DMARC1; p=reject; rua=mailto:[email protected]",
"tags": {
"v": "DMARC1",
"p": "reject",
"rua": "mailto:[email protected]"
}
},
"mta_sts": {
"exists": true,
"record": "v=STSv1; id=2024010101Z",
"valid": true,
"policy_id": "2024010101Z",
"policy_fetch_ok": true,
"policy_http_status": 200,
"mode": "enforce",
"max_age": 86400,
"mx_hosts": [
"*.google.com"
],
"mx_records": [
"aspmx.l.google.com"
],
"policy_matches_mx": true,
"uncovered_mx": [],
"errors": []
},
"tls_rpt": {
"exists": true,
"record": "v=TLSRPTv1; rua=mailto:[email protected]",
"valid": true,
"rua": [
"mailto:[email protected]"
],
"errors": []
},
"client_access": {
"provider_hint": {
"id": "google_workspace",
"name": "Google Workspace"
},
"mx_records": [
"aspmx.l.google.com"
],
"services": [
{
"service": "imap",
"host": "imap.gmail.com",
"port": 993,
"source": "provider_default",
"priority": null,
"weight": null,
"tls_mode": "implicit",
"reachable": true,
"tls_negotiated": true,
"starttls_offered": null,
"protocol": "TLSv1.3",
"cipher": "TLS_AES_256_GCM_SHA384",
"certificate": {
"subject": "/CN=imap.gmail.com",
"issuer": "/CN=WR2",
"not_before": "2026-01-01T00:00:00Z",
"not_after": "2026-07-01T00:00:00Z",
"days_to_expiry": 70,
"expired": false,
"san_domains": [
"imap.gmail.com"
],
"public_key_type": "EC",
"public_key_bits": 256,
"fingerprint_sha256": "CC:DD:EE:FF",
"hostname_match": true,
"chain_valid": true,
"chain_error": null
},
"chain_depth": 2,
"error": null
}
],
"reachable_service_count": 1,
"secure_service_count": 1
},
"autodiscover": {
"provider_hint": {
"id": "google_workspace",
"name": "Google Workspace"
},
"mx_records": [
"aspmx.l.google.com"
],
"srv": {
"autodiscover": [],
"submission": [],
"submissions": [],
"imap": [],
"imaps": [],
"pop3": [],
"pop3s": []
},
"thunderbird_autoconfig": {
"subdomain": {
"url": "https://autoconfig.google.com/mail/config-v1.1.xml?emailaddress=postmaster%40google.com",
"status_code": 404,
"content_type": "text/html",
"final_url": "https://autoconfig.google.com/mail/config-v1.1.xml?emailaddress=postmaster%40google.com",
"redirect_count": 0,
"incoming": [],
"outgoing": [],
"error": null
},
"well_known": {
"url": "https://google.com/.well-known/autoconfig/mail/config-v1.1.xml?emailaddress=postmaster%40google.com",
"status_code": 200,
"content_type": "application/xml",
"final_url": "https://google.com/.well-known/autoconfig/mail/config-v1.1.xml?emailaddress=postmaster%40google.com",
"redirect_count": 0,
"incoming": [
{
"type": "imap",
"hostname": "imap.gmail.com",
"port": 993,
"socket_type": "SSL"
}
],
"outgoing": [
{
"type": "smtp",
"hostname": "smtp.gmail.com",
"port": 587,
"socket_type": "STARTTLS"
}
],
"error": null
}
},
"outlook_autodiscover": {
"url": "https://autodiscover.google.com/autodiscover/autodiscover.xml",
"status_code": 401,
"content_type": "text/html",
"final_url": "https://autodiscover.google.com/autodiscover/autodiscover.xml",
"redirect_count": 0,
"auth_required": true,
"error": null
},
"recommended": [
{
"service": "imap",
"host": "imap.gmail.com",
"port": 993,
"tls_mode": "implicit",
"source": "provider_default"
}
]
},
"edge_summary": {
"relay_configured": true,
"evidence_sources": [
"spf_walk",
"mail_policies",
"bimi_audit",
"dkim_audit",
"mail_client_access",
"mail_autodiscover"
],
"spf_lookup_count": 1,
"spf_lookup_limit_exceeded": false,
"dkim_valid_selector_count": 1,
"dkim_weak_selector_count": 0,
"dkim_revoked_selector_count": 0,
"providers_detected": [
"Google Workspace"
],
"mta_sts_enforced": true,
"tls_rpt_configured": true,
"bimi_logo_verified": true,
"vmc_certificate_valid": true,
"client_access_reachable_services": 1,
"client_access_secure_services": 1,
"autodiscover_recommendation_count": 1
},
"provider_selector_recommendations": [
{
"provider": "Google Workspace",
"selectors": [
"google",
"20230601",
"20210112"
],
"source": "detected",
"checked_selectors": [
"google"
],
"found_selectors": [
"google"
],
"missing_selectors": [
"20230601",
"20210112"
]
}
],
"grade": "A",
"notes": []
}Frequently Asked Questions
What is SPF?
Sender Policy Framework (SPF) is a DNS record that specifies which mail servers are authorized to send email for your domain.
What is DMARC?
Domain-based Message Authentication, Reporting & Conformance (DMARC) tells receiving servers how to handle emails that fail SPF or DKIM checks.
What is DKIM?
DomainKeys Identified Mail (DKIM) adds a digital signature to outgoing emails, allowing receivers to verify the message was not altered.
Why do I need all three?
SPF, DKIM, and DMARC work together. SPF authorizes servers, DKIM signs messages, and DMARC sets policy. All three provide comprehensive protection.
Related Tools & Resources
HTTP Status Codes
We document the HTTP status codes you should handle so you can distinguish successful responses, auth issues, credits, rate limits, missing data, and upstream failures.
OK
200
Request successful
Bad Request
400
Invalid parameters
Unauthorized
401
Missing or invalid API key/session.
Payment Required
402
Not enough credits to run this request.
Too Many Requests
429
Rate limit exceeded
Check Email Authentication