established · 4.7

Email Verification

Score 25.8 / 100 25 providers 17 APIs Search apis.io →
Variants seen in the corpus: Email VerificationEmailVerificationemail-verification

Providers using this tag (25)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Exemplar 9 Complete, well-documented, and agent-ready
SendPulseMarketingMarketing AutomationEmailTransactional Email19 APIs75.7MailboxlayerEmailEmail ValidationSMTP2 APIs73.4DeBounceEmail ValidationDeliverabilityDisposable Email Detection6 APIs71.8HunterContact DiscoveryEmailLead Generation12 APIs71.4WappalyzerTechnology DetectionTechnographicsWebsite AnalysisCMS Detection11 APIs70.9ZeroBounceEmail ValidationEmail DeliverabilityMarketing6 APIs69.2Snov.ioSales AutomationEmail FinderLead Generation17 APIs67.8InstantlyCold EmailOutboundSalesDeliverability2 APIs67.0EnrichData EnrichmentContact DiscoveryWeb IntelligenceB2B Data10 APIs66.9
Strong 7 Solid coverage with minor gaps
MailerSendEmailTransactional EmailSMTPMarketing8 APIs64.6NeverBounceEmail ValidationEmail HygieneDeliverability5 APIs62.2RevenueBaseCompanyB2B DataData Enrichment5 APIs59.6UpLeadB2BLead GenerationContact DataCompany Data8 APIs59.0KickboxEmail ValidationDeliverabilityData Quality5 APIs57.9PabblyAutomationEmail MarketingSubscription BillingBilling7 APIs57.3Email Verifier APIDeliverabilitySMTP CheckBounce Prevention1 API56.8
Developing 4 Usable, with meaningful gaps to close
MCP360MCPMCP ServerMCP GatewayAI Agents38 APIs51.9CustomerOSCRMRevenueGo-To-MarketLead Intelligence4 APIs49.9uCheckerEmailSMTPDNS3 APIs48.0WhoAPICompanyDomainsWHOISDomain Availability1 API45.3
Thin 5 Limited public surface area
SuperTokensAuthenticationOpen-SourceSession ManagementSocial Login10 APIs35.2OpenproviderDomainsDNSHostingReseller35 APIs31.4Edge ImpulseArtificial IntelligenceEmbedded Machine LearningEdge AI34 APIs31.3TerminusCompanyAccount Based MarketingMarketingAdvertising3 APIs31.1Power2SMECompanyMarketplacesSMEProcurement17 APIs26.4

APIs with this tag (17)

Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Exemplar 7 Complete, well-documented, and agent-ready
SendPulse Verifier APIEmail address verification and mailing-list cleaning to identify invalid, disposable or high-risk contacts ...75.7Mailboxlayer Email Validation APIREST/JSON API for real-time email validation: syntax check, typo suggestions, MX-record lookup, SMTP verifi...73.4Wappalyzer Public APIThe provider-published OpenAPI 3.1 contract for every documented public REST endpoint — credit balance, tec...70.9Snov.io Email Verification APIVerify email deliverability and validity67.8Snov.io Email Verification APIVerify the deliverability and validity of up to 10 email addresses per request using a two-step async API. ...67.8Instantly API v2The full Instantly REST API v2 — 129 paths, 173 operations across 28 resource groups, published as OpenAPI ...67.0Enrich Email Verification APIValidate email addresses for deliverability, single or in batches of up to 500,000 emails.66.9
Strong 3 Solid coverage with minor gaps
NeverBounce API v4RESTful JSON API for email verification. Provides single email verification (`/single/check`), bulk job ver...62.2Kickbox Email Verification APIREST API for verifying the deliverability of email addresses in real time. Returns a result (deliverable, u...57.9Pabbly Email Verification APIREST API for Pabbly Email Verification. A single operation, POST /email-lists/verify-single, returning a de...57.3
Developing 2 Usable, with meaningful gaps to close
MCP360 Email Verification APIThe email-verification API from MCP360 — 2 operation(s) for email-verification.51.9CustomerOS REST APIKey-authenticated REST surface for the customeros.ai cloud, published as six OpenAPI 3.0.1 documents (one p...49.9
Thin 5 Limited public surface area
SuperTokens Email Verification APIEmail verification token creation and validation35.2Openprovider EmailVerification APIThe EmailVerification API from Openprovider — 3 operation(s) for emailverification.31.4Edge Impulse EmailVerification APIThe EmailVerification API from Edge Impulse — 4 operation(s) for emailverification.31.3Verify APIEmail verification API — single-address real-time validation and asynchronous CSV batch verification, sold ...31.1Power2SME Email Verification API26.4

Score breakdown

Frequency
44.8
log-scaled weighted occurrences
Breadth
0.7
spread across providers
Quality lift
68.9
mean composite of providers using it
Cohesion
4.2
strength of nearest seed neighbor

Related tags

Deliverability 11 co-occurrences Email Validation 7 co-occurrences Data Quality 8 co-occurrences Data Enrichment 5 co-occurrences Email 10 co-occurrences Campaigns 5 co-occurrences Marketing 6 co-occurrences Account 9 co-occurrences

Where this tag comes from

Provider tag21
Api tag17
Openapi tag4
Openapi op tag12

Cohort brief

Auto-generated

The 25 providers in the APIs.io catalog tagged Email Verification, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
25
all scored
Mean Kin Score
56.1
+35.4 vs catalog 20.7
Mean Agent Readiness
36.5
+26.8 vs catalog 9.7
Spread
26.4–75.7
median 59 · σ 14.8
How the 25 split by band
Exemplar 9Strong 7Developing 4Thin 5Emerging 0Minimal 0
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Access Clarity 67.2 22.3 +44.9 25
Contract Quality 56.8 17.5 +39.3 25
Developer Ergonomics 56.8 17.9 +38.9 25
Operational Transparency 42.7 11.3 +31.4 25
Discoverability 80.1 60.4 +19.7 25
Contract Governance 24.7 6.4 +18.3 25

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes
ArtifactThis cohortCatalogDifference
MCP server (any) 72% 16% +56
MCP server (first-party) 64% 7% +57
Agent Skills 0% 0% 0
OAuth scopes 32% 9% +23
Security 100% 88% +12
Arazzo workflows 4% 2% +2
Governance rules 28% 13% +15

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score
  1. 1 SendPulse 75.7
  2. 2 Mailboxlayer 73.4
  3. 3 DeBounce 71.8
  4. 4 Hunter 71.4
  5. 5 Wappalyzer 70.9
  6. 6 ZeroBounce 69.2
  7. 7 Snov.io 67.8
  8. 8 Instantly 67
  9. 9 Enrich 66.9
  10. 10 MailerSend 64.6
Top by Agent Readiness
  1. 1 DeBounce 69
  2. 2 Instantly 62.7
  3. 3 SendPulse 55.8
  4. 4 Wappalyzer 52.2
  5. 5 Hunter 51.7
  6. 6 MailerSend 50.2
  7. 7 Enrich 46.1
  8. 8 RevenueBase 40.1
  9. 9 uChecker 36.7
  10. 10 NeverBounce 36.4
All 25 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 25 August 2026, across 26891 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.

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The distribution (Pro) 
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