emerging ↑ 5.2

Sales Engagement

Score 23.2 / 100 35 providers 14 APIs Search apis.io →
Variants seen in the corpus: Sales Engagementsales-engagement

Providers using this tag (35)

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

Exemplar 5 Complete, well-documented, and agent-ready
CloseCRMInside SalesCalling62 APIs79.1VesselCRMChatDialerEmbedded Integrations20 APIs72.1UserGemsSales IntelligenceOutboundAccount Based MarketingChampion Tracking4 APIs71.6OutreachSalesSequencesCRM5 APIs70.5lemlistEmail OutreachCold EmailSales Automation22 APIs68.3
Strong 12 Solid coverage with minor gaps
GongSalesRevenue IntelligenceConversationAnalytics26 APIs66.4Apollo.ioSales IntelligenceProspectingEngagementB2B Data14 APIs64.2SPOTIOField SalesTerritory ManagementCRM39 APIs61.9Apollo API DocumentationAPI DocumentationSales IntelligenceData EnrichmentPeople Search14 APIs61.8ClariRevenue OperationsForecastingPipeline ManagementSales Intelligence11 APIs60.9LeanDataRevenue OperationsLead RoutingLead to Account MatchingSalesforce9 APIs60.7KixieCompanyVoiceTelephony3 APIs60.5SalesloftSalesCadencesCRM85 APIs59.6LeadIQSales IntelligenceB2B DataContact DataLead Generation3 APIs57.1SupaglueCRMHRISUnified-APIOpen-Source40 APIs56.3NooksCompanyArtificial IntelligenceSales Dialer2 APIs54.9SendosoCorporate GiftingDirect MailMarketing Automation5 APIs54.8
Developing 8 Usable, with meaningful gaps to close
MixmaxCompanySoftware-as-a-ServiceMCPAgents6 APIs51.9PersistIQCompanySalesOutbound10 APIs51.9ReevoCompanyArtificial IntelligenceSalesCRM2 APIs51.5ClearSlideCompanySales EnablementContent Management7 APIs50.8BonjoroVideo MessagingCustomer EngagementCustomer Success1 API49.4OrumCompanyArtificial IntelligenceSales49.0MonacoCompanyCRMSalesRevenue Operations13 APIs44.9RingDNAConversation IntelligenceSales DialingCall Recording2 APIs40.1
Thin 3 Limited public surface area
Revenue.ioRevenue IntelligenceConversation IntelligenceRevenue Operations1 API33.5Regie.aiCompanyAi AppsSales AI30.5YeswareCompanyEmail TrackingSales Productivity28.4
Emerging 2 Early or largely undocumented
LavenderCompanySalesEmailArtificial Intelligence18.6CiroCompanySalesSales Intelligence12.8
Minimal 5 Almost no public developer surface
CardinalCompanyArtificial IntelligenceSalesOutbound Sales8.9ToutCompanySalesEmail Tracking5.7VymoCompanySales TechFinancial-Services1 API5.4Insent.aiCompanyConversational MarketingChat5.0ToutAppCompanySalesEmail Tracking5.0

APIs with this tag (14)

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 9 Complete, well-documented, and agent-ready
Vessel Apollo Actions APIThe Vessel Actions API for Apollo — typed, validated wrappers over Apollo's native API served under /api/ac...72.1Vessel Engagement API (v1, legacy)The first-generation Vessel Sales Engagement API, published under /engagement/* on api.vessel.land. Covers ...72.1Vessel Outreach Actions APIThe Vessel Actions API for Outreach — typed, validated wrappers over Outreach's native API served under /ap...72.1Vessel Sales Engagement Unified APIThe Vessel Sales Engagement Unified API normalizes sales engagement objects across Outreach, Salesloft, Apo...72.1Vessel Salesloft Actions APIThe Vessel Actions API for Salesloft — typed, validated wrappers over Salesloft's native API served under /...72.1Outreach MCP ServerRemote Model Context Protocol server exposing Outreach as 41 agent tools (27 read, 11 write, 3 schema intro...70.5Outreach REST APIJSON API 1.0 REST API covering accounts, prospects, opportunities, sequences, sequence states, mailings, ca...70.5Outreach WebhooksEvent-driven webhook deliveries for accounts, calls, contacts, email addresses, imports, Kaia recordings, m...70.5lemlist REST APIThe full lemlist REST API - 143 operations across campaigns, sequences, leads, contacts, companies, the B2B...68.3
Strong 2 Solid coverage with minor gaps
Salesloft Platform APIREST API for cadences, people, accounts, emails, calls, tasks, opportunities and analytics.59.6Nooks Sequencing APIThe Nooks Sequencing API (also published as the "Nooks External API") provides programmatic access to seque...54.9
Developing 1 Usable, with meaningful gaps to close
Bonjoro API V2REST API for the Bonjoro personal-video platform. Create and assign greets (video tasks) for one or many re...49.4
Thin 1 Limited public surface area
Revenue.io APIRevenue.io's programmable surface for guided selling, call analytics, rep performance data, conversation in...33.5
Minimal 1 Almost no public developer surface
Vymo Platform APIVymo's enterprise platform API, used by banks, insurers and asset managers to push leads into Vymo, sync us...5.4

Score breakdown

Frequency
46.3
log-scaled weighted occurrences
Breadth
1.0
spread across providers
Quality lift
56.9
mean composite of providers using it
Cohesion
0.0
strength of nearest seed neighbor

Related tags

Sequences 9 co-occurrences Revenue Operations 13 co-occurrences CRM Integration 6 co-occurrences Sales Automation 7 co-occurrences Go-To-Market 8 co-occurrences Conversation Intelligence 7 co-occurrences Prospecting 5 co-occurrences Calls 6 co-occurrences

Where this tag comes from

Provider tag35
Api tag14

Cohort brief

Auto-generated

The 35 providers in the APIs.io catalog tagged Sales Engagement, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
35
all scored
Mean Kin Score
46.4
+25.7 vs catalog 20.7
Mean Agent Readiness
31.3
+21.6 vs catalog 9.7
Spread
5–79.1
median 51.9 · σ 21.9
How the 35 split by band
Exemplar 5Strong 12Developing 8Thin 3Emerging 2Minimal 5
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Access Clarity 63.3 22.3 +41 35
Operational Transparency 38.9 11.3 +27.6 35
Developer Ergonomics 40.9 17.9 +23 35
Contract Quality 39.6 17.5 +22.1 35
Contract Governance 23.3 6.4 +16.9 35
Discoverability 75.5 60.4 +15.1 35

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) 63% 16% +47
MCP server (first-party) 57% 7% +50
Agent Skills 0% 0% 0
OAuth scopes 54% 9% +45
Security 100% 88% +12
Arazzo workflows 0% 2% -2
Governance rules 20% 13% +7

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 Close 79.1
  2. 2 Vessel 72.1
  3. 3 UserGems 71.6
  4. 4 Outreach 70.5
  5. 5 lemlist 68.3
  6. 6 Gong 66.4
  7. 7 Apollo.io 64.2
  8. 8 SPOTIO 61.9
  9. 9 Apollo API Documentation 61.8
  10. 10 Clari 60.9
Top by Agent Readiness
  1. 1 lemlist 63.9
  2. 2 Monaco 58.1
  3. 3 Apollo.io 55.3
  4. 4 Reevo 54.7
  5. 5 UserGems 54.7
  6. 6 LeadIQ 51.1
  7. 7 Nooks 51.1
  8. 8 Close 49.7
  9. 9 LeanData 48.2
  10. 10 Salesloft 47.9
All 35 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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  • cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
  • cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
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The distribution (Pro) 
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  -H "X-API-Key: $APIS_IO_KEY"

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