Email Marketing
Business capabilities this tag reaches
Marketing Management 1
Providers using this tag (81)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Exemplar 18 Complete, well-documented, and agent-ready
Strong 26 Solid coverage with minor gaps
Developing 16 Usable, with meaningful gaps to close
Thin 7 Limited public surface area
Minimal 8 Almost no public developer surface
APIs with this tag (26)
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 3 Complete, well-documented, and agent-ready
Kit API V3 (Deprecated)The legacy ConvertKit V3 API is deprecated and slated for discontinuation; new integrations should target V4.MailerLite Classic API (Legacy)The MailerLite Classic API serves legacy MailerLite Classic accounts. New integrations should target the cu...Encharge Broadcasts APIThe Broadcasts API from Encharge — 1 operation(s) for sending broadcasts.
Strong 18 Solid coverage with minor gaps
Campaign Monitor APIREST API for managing email campaigns, subscriber lists, transactional emails, segments, journeys, template...Zoho CampaignsThe Zoho Campaigns API provides programmatic access to email marketing capabilities, allowing integration w...Zoho Campaigns APIREST API for managing email campaigns, mailing lists, subscribers, templates, and analytics in Zoho Campaig...Nutshell Audiences APIEmail-marketing audiences — static lists of contacts used to organize people for marketing sends. 2 operati...Nutshell Editions APIMarketing email editions — individual email sends and their metadata. 2 operation(s) across 2 path(s).Account Engagement API v5Version 5 REST API for managing prospects, accounts, campaigns, emails, forms, lists, and engagement progra...EmailOctopus Automation APIEnqueue an existing contact into an EmailOctopus automation. Write-only — the v2 API exposes no operation t...EmailOctopus Campaign APIRead campaigns and their three report projections — summary counters, per-link clicks, and per-contact enga...EmailOctopus Contact APIManage subscribers on a list: create, read, update, delete, upsert by email address, and update many at onc...EmailOctopus Field APIDefine the per-list custom fields contact records are written against. Fields are keyed by a stable tag slu...EmailOctopus List APICreate and manage subscriber lists, the aggregate root of the EmailOctopus data model. Fields, tags and con...EmailOctopus Tag APICreate, rename, delete and list the tags used to segment contacts on a list. Tags are keyed by slug rather ...Kartra APIKartra's inbound developer API. One endpoint, POST only, form-encoded, with the operation selected by `acti...Drip MCP ServerDrip operates a remote Model Context Protocol server at https://api.getdrip.com/mcp, protected by its OAuth...Drip REST APIREST API for Drip exposing subscribers, tags, custom fields, broadcasts, email campaigns, events, conversio...SAP Emarsys Customer Engagement APIREST APIs for marketing automation, customer engagement, and personalized campaign management across email,...Pabbly Email Marketing APIREST API for Pabbly Email Marketing — 23 documented operations across subscribers (upsert semantics on crea...VBOUT Email Marketing APIThe Email Marketing API from VBOUT — 10 operation(s) for email marketing.
Developing 4 Usable, with meaningful gaps to close
iContact REST APIREST API v2.2 for managing contacts, lists, segments, campaigns, messages, sends, and reporting inside the ...Sailthru APIThe core Sailthru HTTPS API. All requests are GET, POST or DELETE calls to https://api.sailthru.com/, authDynamics 365 Marketing APIAPI for managing marketing campaigns, customer journeys, email marketing, and lead scoring.Freshworks Freshmarketer APIThe Freshmarketer API provides developer access to marketing automation capabilities within the Freshmarket...
Emerging 1 Early or largely undocumented
Companies reaching this through an API (3)
These companies publish an API, specification or operation carrying “Email Marketing” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.
Score breakdown
Frequency
55.3
log-scaled weighted occurrences
Breadth
2.1
spread across providers
Quality lift
61.8
mean composite of providers using it
Cohesion
38.0
strength of nearest seed neighbor
Where this tag sits
Related tags
Marketing Automation 56 co-occurrences
Transactional Email 18 co-occurrences
Campaigns 35 co-occurrences
Landing Pages 14 co-occurrences
Segments 16 co-occurrences
Segmentation 12 co-occurrences
Newsletters 11 co-occurrences
Subscribers 11 co-occurrences
Where this tag comes from
Provider tag81
Api tag26
Cohort brief
Auto-generatedThe 79 providers in the APIs.io catalog tagged Email Marketing, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.
Providers
79
all scored
Mean Kin Score
51.5
+28.6 vs catalog 22.9
Mean Agent Readiness
30.7
+18.8 vs catalog 11.9
Spread
0–91.6
median 56.2 · σ 20.9
How the 79 split by band
Exemplar 18Strong 26Developing 16Thin 7Emerging 6Minimal 6
Facet averages, against the whole catalog
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Access Clarity | 68.1 | 26.5 | +41.6 | 79 |
| Operational Transparency | 44.2 | 13.7 | +30.5 | 79 |
| Developer Ergonomics | 50.8 | 23.2 | +27.6 | 79 |
| Contract Quality | 40.6 | 17.6 | +23 | 79 |
| Discoverability | 68.1 | 58.1 | +10 | 79 |
| Contract Governance | 14.5 | 6.3 | +8.2 | 79 |
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
| Artifact | This cohort | Catalog | Difference |
|---|---|---|---|
| MCP server (any) | 37% | 14% | +23 |
| MCP server (first-party) | 34% | 12% | +22 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 46% | 11% | +35 |
| Security | 99% | 98% | +1 |
| Arazzo workflows | 6% | 2% | +4 |
| Governance rules | 25% | 14% | +11 |
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 HubSpot 91.6
- 2 SendGrid 82.4
- 3 Brevo 81.7
- 4 Mailchimp 79.2
- 5 Kit 78.5
- 6 ActiveCampaign 77.6
- 7 Listrak 73.7
- 8 MailerLite 73.7
- 9 Klaviyo 73.6
- 10 Omnisend 72.9
Top by Agent Readiness
- 1 Bloomreach 63.7
- 2 Paubox 61.5
- 3 Kit 60.4
- 4 Knak 58.8
- 5 Brevo 58.4
- 6 Omnisend 57.3
- 7 Ontraport 55.9
- 8 Klaviyo 54.4
- 9 MailerLite 54.3
- 10 HubSpot 54
All 81 members of this roster resolve to a scored provider in
the catalog.Generated from the catalog build of
5 October 2026, across 29093
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.
Work with this as data
Every tag here is available over the APIs.io API and to AI agents over MCP.