established · 2.0

Emails

Score 27.0 / 100 39 providers 38 APIs Search apis.io →
Variants seen in the corpus: Emailsemails

Providers using this tag (39)

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

Exemplar 8 Complete, well-documented, and agent-ready
HubSpotAnalyticsCommerceContentCRM93 APIs82.4MailchimpCampaignsEmail MarketingMarketing AutomationNewsletters120 APIs81.5SendPulseMarketingMarketing AutomationEmailTransactional Email19 APIs75.7VesselCRMChatDialerEmbedded Integrations20 APIs72.1LightfieldCompanyApplicationCRMSales13 APIs71.6ButtondownAnalyticsAutomationsEmailMarkdown30 APIs71.5PostmarkMessagingTransactional EmailDeliverability47 APIs71.1Cvent Event CloudAttendee HubAttendeesBulkContacts42 APIs69.6
Strong 15 Solid coverage with minor gaps
Inflection.ioCompanySoftware-as-a-ServiceMarketingMarketing Automation6 APIs62.9FirstPromoterAffiliate MarketingReferral TrackingSoftware-as-a-ServiceCommission Management37 APIs62.0Xiaoman (OKKI)CompanyCRMForeign TradeB2B7 APIs61.9NutshellCRMSalesPipeline ManagementEmail Marketing27 APIs60.8ParagraphCompanyPublishingNewslettersWeb310 APIs60.8SalesloftSalesSales EngagementCadencesCRM85 APIs59.6DatadogAnalyticsDashboardsMonitoringPlatform290 APIs57.1LawVuCompanyLegalLegal TechnologyLegal Operations26 APIs57.0AutomatticCompanyContent ManagementPublishingBlogging9 APIs56.8IRONSCALESEmail SecurityCybersecurityPhishingAnti-Phishing10 APIs56.0MarketoAdobeAutomationMarketingMarketing Automation68 APIs55.7NooksCompanyArtificial IntelligenceSales EngagementSales Dialer2 APIs54.9Oracle EloquaCRMEmail MarketingLead ManagementMarketing Automation23 APIs54.9GrafanaAlertingAnalyticsDashboardsLogs138 APIs54.8AtlassianCodeCollaborationPlatformProductivity359 APIs54.7
Developing 8 Usable, with meaningful gaps to close
Auth0AI AgentsAuthenticationAuthorizationFGA76 APIs53.4GenesysCompanySoftwareContact CenterCustomer Experience87 APIs52.7Vanilla ForumsCommunityForumsCommunity ManagementWebhook58 APIs51.0ResendEmailDeveloper ToolsTransactional EmailMarketing Email13 APIs50.9AffinityCRMRelationship IntelligencePrivate EquityVenture Capital11 APIs50.5ScalewayArtificial IntelligenceCloud ComputingContainersDatabase74 APIs47.6Packet HostCompanyBare MetalCloud InfrastructureInfrastructure-as-a-Service40 APIs43.5Val TownDeveloper ToolsServerlessJavaScriptTypeScript13 APIs40.1
Thin 8 Limited public surface area
MailerooEmailEmail DeliveryMarketing EmailSMTP2 APIs36.7EscapePlatformSecurity20 APIs34.6UnissonCompanyArtificial IntelligenceAI AgentsCustomer Success45 APIs34.3BitmovinVideoEncodingStreamingLive Streaming18 APIs33.2XSKYStorageSoftware-Defined StorageObject StorageBlock Storage124 APIs31.8EquinixFortune 1000Data CentersInterconnectionColocation74 APIs30.5PrimitiveCompany22 APIs28.0Stack AuthAuthenticationUser ManagementOpen-SourceSelf-Hosted18 APIs27.7

APIs with this tag (38)

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
HubSpot Emails APIOperations for managing email engagement records82.4Mailchimp Emails APIThe Emails API from Mailchimp — 8 operation(s) for emails.81.5SendPulse SMTP APITransactional email sending, delivery and bounce tracking, unsubscribe management and sender-domain identity.75.7Vessel Engagement API (v1, legacy)The first-generation Vessel Sales Engagement API, published under /engagement/* on api.vessel.land. Covers ...72.1Lightfield Emails APIThe Emails API from Lightfield — 4 operation(s) for emails.71.6Buttondown Emails APIThe Emails API from Buttondown — 11 operation(s) covering drafting, scheduling, publishing, rendering and a...71.5Cvent Event Cloud Emails APIEvent planners use emails to invite registrants, market their events and request feedback from attendees. U...69.6
Strong 15 Solid coverage with minor gaps
Inflection.io Emails APIThe Emails API from Inflection.io — 2 operation(s) for creating and reading HTML emails.62.9FirstPromoter Emails APIFirstPromoter Emails API - 11 operation(s) on the admin (api/v2/company) surface, from FirstPromoter's own ...62.0OKKI Go Emails APIThe Emails API from OKKI Go (go.okki.ai) — 6 operations for batch and personalized cold-outreach email send...61.9Nutshell Emails APIIndividual email messages recorded against Nutshell records. 1 operation(s) across 1 path(s).60.8Paragraph emails APIThe emails API from Paragraph — 1 operation(s) for emails.60.8Salesloft Emails API[https://developer.salesloft.com/docs/api/emails/](https://developer.salesloft.com/docs/api/emails/)59.6Datadog Emails APIThe Emails API from Datadog — 1 operation(s) for emails.57.1LawVu Emails APIThe Emails API from LawVu — 5 operation(s) for emails.57.0WordPress.com REST API - wpcom/v2 namespaceThe WordPress.com and Jetpack platform extension namespace — 1,716 operations covering hosting and code dep...56.8IRONSCALES Emails APIThe Emails API from IRONSCALES — 1 operation(s) for emails.56.0Marketo Emails APIEmail Controller55.7Nooks Sequencing APIThe Nooks Sequencing API (also published as the "Nooks External API") provides programmatic access to seque...54.9Oracle Eloqua Emails APICreate and manage email assets54.9Grafana Emails APIThe Emails API from Grafana — 3 operation(s) for emails.54.8Atlassian Emails APIThe Emails API from Atlassian — 2 operation(s) for emails.54.7
Developing 8 Usable, with meaningful gaps to close
Auth0 emails APIThe emails API from Auth0 — 1 operation(s) for emails.53.4Genesys Emails APIThe Emails API from Genesys — 2 operation(s) for emails.52.7Vanilla Forums Emails APIThe Emails API from Vanilla Forums — 3 operation(s) for emails.51.0Resend Emails APIStart sending emails through the Resend API.50.9Affinity emails APIOperations about emails50.5Scaleway Emails APIThis section lists your emails and shows you how to manage them.47.6Packet Host Emails APIEmail Management43.5Val Town emails APIEmails40.1
Thin 8 Limited public surface area
Maileroo Emails APISend transactional and bulk emails36.7Escape Emails APIRead scan inbox emails. The public API provides endpoints to list inbox emails and read their raw content w...34.6Unisson emails APIThe emails API from Unisson — 7 operation(s) for emails.34.3Bitmovin Emails APIThe Emails API from Bitmovin — 6 operation(s) for emails.33.2XSKY emails APIEmailController Operations about Email31.8Equinix Emails APIEmail Management30.5Primitive Emails APIList, inspect, and manage received emails28.0Stack Auth Emails APIThe Emails API from Stack Auth — 2 operation(s) for emails.27.7

Score breakdown

Frequency
54.1
log-scaled weighted occurrences
Breadth
1.1
spread across providers
Quality lift
66.1
mean composite of providers using it
Cohesion
0.0
strength of nearest seed neighbor

Related tags

Send 6 co-occurrences Email Templates 6 co-occurrences Transactional Email 6 co-occurrences Memberships 7 co-occurrences Tests 5 co-occurrences Rules 8 co-occurrences Subscribers 5 co-occurrences Email Marketing 7 co-occurrences

Where this tag comes from

Api tag34
Provider tag1
Openapi tag31
Openapi op tag142

Cohort brief

Auto-generated

The 39 providers in the APIs.io catalog tagged Emails, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
39
all scored
Mean Kin Score
54.2
+33.5 vs catalog 20.7
Mean Agent Readiness
39.3
+29.6 vs catalog 9.7
Spread
27.7–82.4
median 54.9 · σ 14.5
How the 39 split by band
Exemplar 8Strong 15Developing 8Thin 8Emerging 0Minimal 0
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 61.3 17.5 +43.8 39
Developer Ergonomics 53.5 17.9 +35.6 39
Operational Transparency 46.4 11.3 +35.1 39
Access Clarity 56.2 22.3 +33.9 39
Contract Governance 23.9 6.4 +17.5 39
Discoverability 75.5 60.4 +15.1 39

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) 49% 7% +42
Agent Skills 0% 0% 0
OAuth scopes 46% 9% +37
Security 100% 88% +12
Arazzo workflows 18% 2% +16
Governance rules 41% 13% +28

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 HubSpot 82.4
  2. 2 Mailchimp 81.5
  3. 3 SendPulse 75.7
  4. 4 Vessel 72.1
  5. 5 Lightfield 71.6
  6. 6 Buttondown 71.5
  7. 7 Postmark 71.1
  8. 8 Cvent Event Cloud 69.6
  9. 9 Inflection.io 62.9
  10. 10 FirstPromoter 62
Top by Agent Readiness
  1. 1 Primitive 75.2
  2. 2 Lightfield 65.6
  3. 3 Automattic 62.3
  4. 4 SendPulse 55.8
  5. 5 Genesys 55.1
  6. 6 HubSpot 54.4
  7. 7 Inflection.io 54.2
  8. 8 IRONSCALES 51.6
  9. 9 LawVu 51.5
  10. 10 Nooks 51.1
All 39 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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All tags 
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As a scored cohort 
curl "https://apis.io/api/v1/cohorts/tag/emails"
The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/emails/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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