established · 4.2

Lead Generation

Score 25.4 / 100 104 providers 24 APIs Search apis.io →
Variants seen in the corpus: Lead Generationlead generationlead-generation

Providers using this tag (104)

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

Exemplar 10 Complete, well-documented, and agent-ready
SalesforceFortune 500Artificial IntelligenceAnalyticsCloud294 APIs83.3ZoomInfoB2BB2B DataCompany DataContact Database29 APIs80.8LinkedInBusinessCareersMarketingProfessional Networking65 APIs75.1CoresignalAgentic SearchB2B DataCompaniesCompany Data4 APIs71.4HunterContact DiscoveryEmailEmail Verification12 APIs71.4SurfeB2B DataContact DataSales IntelligenceEnrichment4 APIs70.6Seamless.AIB2BContact DataSales IntelligenceProspecting2 APIs69.8UnbounceLanding PagesConversion Rate OptimizationMarketingA/B Testing9 APIs68.7lemlistEmail OutreachSales EngagementCold EmailSales Automation22 APIs68.3Snov.ioSales AutomationEmail FinderEmail Verification17 APIs67.8
Strong 20 Solid coverage with minor gaps
WistiaVideo HostingVideo MarketingVideo Analytics16 APIs65.1PlayableCompanymarketing-gamificationinteractive-marketingCampaign Management3 APIs64.3RocketReachB2BContact DataEmail LookupPhone Lookup3 APIs63.3LinkedIn Marketing APIAdvertisingMarketingLinkedIn6 APIs61.6BuiltWithTechnology ProfilingWeb IntelligenceTechnology Detection31 APIs59.8AdaptB2B DataContact DataCompany DataLead Intelligence4 APIs59.5UpLeadB2BContact DataCompany Data8 APIs59.0RB2BIdentity ResolutionVisitor IdentificationB2B Data4 APIs57.7Salesforce Marketing Cloud Account Engagement (Pardot)Marketing AutomationB2B MarketingEmail Marketing3 APIs57.6SalesflareCRMSalesB2BContacts20 APIs57.5LeadIQSales IntelligenceB2B DataContact Data3 APIs57.1HunterEmail FinderEmail VerifierOutreach8 APIs56.8LeOCompanyInsuranceCommercial InsuranceProperty and Casualty3 APIs56.3Facebook Lead AdsAdvertisingLead AdsMarketing API7 APIs55.9PodiumCustomer CommunicationReviewsMessagingPayments1 API55.6Street.co.ukReal-EstateUnited KingdomPropTechCRM3 APIs55.4WarmlyCompanySalesMarketingIntent Data2 APIs55.4WebinarJamWebinarsMarketingLive EventsAutomated Webinars2 APIs54.9LeadpagesCompanyLanding PagesMarketingConversion Optimization3 APIs54.7VoiceGenieCompanyVoice AIConversational AISales Automation2 APIs54.3
Developing 27 Usable, with meaningful gaps to close
Uncodie (now Makinari)CompanyArtificial IntelligenceAI AgentsCRM5 APIs54.2Act-OnCompanyMarketingMarketing AutomationEmail Marketing3 APIs52.7ChatsimpleCompanyAI AgentsConversational AIChatbots2 APIs52.3ReevoCompanyArtificial IntelligenceSalesCRM2 APIs51.5Even FinancialCompanyFinancial-ServicesEmbedded FinanceFintech6 APIs51.0DemioCompanyWebinarsVirtual EventsEvent Management3 APIs50.3ReformFormsForm BuilderHeadless Forms1 API50.1PinofferCompanyAdvertising TechnologyMarketing TechnologyE-Commerce3 APIs50.0Gojiberry AICompanySalesSales Intelligence8 APIs49.7RevnuCompanyGrowth AutomationMarketingArtificial Intelligence2 APIs49.6involve.meCompanyMarketingForms1 API49.4SoFiPersonal FinanceBankingLendingStudent Loans4 APIs48.6OptinMonsterCompanyMarketingConversion Optimization3 APIs48.1WaniwaniCompanyArtificial IntelligenceMCPAI Distribution1 API48.1MailOptinCompanyEmail MarketingMarketing Automation1 API46.5InstapageLanding PagesConversion OptimizationMarketingA/B Testing12 APIs46.4EasyWebinarCompanyWebinarsVideoLive Streaming1 API45.1CognismSales IntelligenceB2BEnrichmentContact Data1 API44.5PoptinCompanyMarketingEmail MarketingMarketing Automation1 API44.1KelvinCompanyEnergyEnergy EfficiencyHome Renovation1 API42.8Luxury PresenceCompanyVertical SoftwareReal-EstatePropTech5 APIs42.7The OrgCompanyOrganizational ChartsPeople DataSales Intelligence1 API42.4HomebotCompanyReal-EstateMortgagePropTech42.3MoonscaleCompanyArtificial IntelligenceSalesSales Automation1 API41.0TofuCompanyAi MlMarketingGo-To-Market1 API39.6LeadGeniusCompanyData EnrichmentSales5 APIs39.4AlbacrossCompanyB2B DataIntent Data3 APIs39.3
Thin 8 Limited public surface area
ZocaCompanyArtificial IntelligenceMarketingBeauty and Wellness3 APIs38.211xCompanyArtificial IntelligenceAI AgentsSales1 API37.8ATOMCompanyMessagingWhatsAppArtificial Intelligence2 APIs36.8ApolloArtificial IntelligenceB2B SalesCRMData Enrichment15 APIs34.6Apollo.ioContact DiscoveryData EnrichmentSales IntelligenceB2B Data7 APIs30.1Replyr.aiCompanyArtificial IntelligenceChatbotsConversational AI1 API27.9CapterraAdvertisingB2BClick ReportingG2 Digital Markets1 API27.7OneShotCompanySalesSales AutomationOutbound27.3
Emerging 18 Early or largely undocumented
A Place for MomCompanySenior LivingSenior CareReferral Marketplace1 API24.6SpareFootSelf StorageMarketplaceStorage Unit Listings24.6SoftwareSuggestSoftware DiscoveryBusiness SoftwareSoftware-as-a-ServiceSoftware Reviews3 APIs23.9StoragePugSelf StorageMarketing WebsitesProperty Management Software23.4GroupbossCompanyMarketingMarketing Automation23.2HeyoCompanyMarketingSocial-MediaPromotions21.7Imagine AiCompanyArtificial IntelligenceB2BContent Marketing20.9Spotwise, Inc.CompanyBroadcast MediaAdvertisingMedia Monitoring4 APIs20.8OslyCompanyArtificial IntelligenceWorkflow-AutomationNo-Code1 API17.6EchoLeadsAI voice salesAI Voice Agentscold calling automationAI SDR1 API16.8DocketCompanyArtificial IntelligenceAI AgentConversational AI15.3AngiHome ServicesMarketplaceLeadsAngie's List2 APIs15.1ImpersonCompanyConversational AIChatbotsCustomer-Support14.2CarNowCompanyAutomotiveDigital RetailDealerships13.3TungeeCompanySales IntelligenceCRM13.3CiroCompanySalesSales IntelligenceSales Engagement12.8RobbyCompanyHome ServicesHVACField Service12.6Total Attorneys (Internet Brands)CompanyLegalLegal Marketing12.4
Minimal 21 Almost no public developer surface
Construction MonitorConstructionContractorsPermits2 APIs10.9Healthcare.comCompanyHealth InsuranceInsuranceHealthcare10.8digitaleseitenCompanyBusiness DirectoryLocal Services10.6SmartAssetCompanyFinancial-ServicesFintechFinancial Advisors10.6LendUpCompanyConsumerConsumer LendingFintech10.2FuturedonticsCompanyCommerceDentalMarketing10.0Goomp Inc, Kalendar AICompanyArtificial IntelligenceSalesSales Automation1 API9.8DatalotCompanyInsuranceInsurtech9.6ScorpionCompanyMarketingAdvertisingDigital Marketing9.3HomeLightReal-EstatePropTechAgent MatchingCash Offers1 API9.0CardinalCompanyArtificial IntelligenceSalesOutbound Sales8.9Chimelabs Holdings PTY LTDCompanyArtificial IntelligenceVoiceReceptionist8.5AlpharankCompanyFinancial-ServicesBankingCredit Unions7.1Datanyze *CompanyEnterpriseSales IntelligenceTechnographics5.3PlacesterCompanyReal-EstateMarketingWebsites5.3BluebirdsCompanySalesGo-To-MarketProspecting5.0LaunchbitCompanyAdvertisingAdTechEmail Marketing5.0Smart RenoCompanyHome RenovationMarketplaceContractors5.0YodleCompanyVertical SoftwareLocal MarketingAdvertising5.0Healthy LabsCompanyHealthHealthcareInsurance3.3Realtor.comReal-EstateProperty ListingsMLSHousing2.4

APIs with this tag (22)

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
Salesforce Pardot API (Account Engagement)The Salesforce Pardot API (now called Account Engagement API) provides programmatic access to Pardot market...83.3LinkedIn Lead Generation APILead generation forms and responses75.1lemlist People Database APISearch the lemlist B2B people and company database, list its filters, and manage saved personas.68.3
Strong 6 Solid coverage with minor gaps
BuiltWith Company to URL APIResolve company names to their associated domain names in JSON and XML formats.59.8BuiltWith Keyword Search APISearch websites by keyword content returning results in JSON and CSV formats.59.8BuiltWith Keywords APIFind websites that use specific keywords in their content.59.8BuiltWith Lists APIRetrieve lists of websites using specific web technologies in XML, JSON, TXT, CSV, and TSV formats.59.8Meta Marketing API - Lead AdsGraph API endpoints for managing Facebook and Instagram lead generation forms, retrieving captured leads, e...55.9Spectre APIThe public API for the Spectre products, documented on the Street.co.uk developer portal and integrated int...55.4
Developing 8 Usable, with meaningful gaps to close
Reform FormsReform's public integration surface. It is not a REST management API — no endpoint exists to create, read o...50.1SoFi Home Loan Affiliate Lead APISoFi's Home Loan Affiliate Lead API is a real, first-party REST endpoint that lets approved affiliate partn...48.6OptinMonster REST APIThe OptinMonster application REST API. Versioned path segments (`/v1`, `/v2`) sit on api.optinmonster.com a...48.1OptinMonster WordPress Plugin APIThe API host the first-party OptinMonster WordPress plugin calls (`OPTINMONSTER_API_URL`). Serves the same ...48.1Instapage Form Submissions APIRetrieve and permanently delete the lead records captured by forms on Instapage landing pages, paged with a...46.4Instapage Public APIThe Instapage Public API is a REST API over the Instapage landing page and post-click optimization platform...46.4kelvin APIREST API for kelvin's energy-renovation engine. Create a simulation from a latitude/longitude (and optional...42.8Tofu Enrich APICredit-metered company and people data enrichment. Two entities — company (keyed on domain or LinkedIn URL)...39.6
Thin 2 Limited public surface area
Zoca Public APIZoca's unauthenticated public surface — the 69 operations behind the free self-serve tools on zoca.com. Cov...38.2Replyr Platform APIREST API for the Replyr operator console at app.replyr.ai. Covers business account details, admins and team...27.9
Emerging 3 Early or largely undocumented
SoftwareSuggest Affiliate ProgramThe SoftwareSuggest affiliate program is a CPL (cost-per-lead) based partner program where affiliates earn ...23.9EchoLeads PlatformEchoLeads provider surfaces. The agent-native artifacts (llms.txt, llms-full.txt, security.txt) are confirm...16.8Angi Leads Delivery (Webhook) APINot a self-serve public API - there is no published base URL, API reference, or API key signup. Once a pro ...15.1

Score breakdown

Frequency
57.4
log-scaled weighted occurrences
Breadth
2.9
spread across providers
Quality lift
45.9
mean composite of providers using it
Cohesion
7.8
strength of nearest seed neighbor

Related tags

Sales Intelligence 23 co-occurrences Prospecting 16 co-occurrences Contact Data 12 co-occurrences Sales Automation 14 co-occurrences B2B Data 11 co-occurrences Data Enrichment 14 co-occurrences Go-To-Market 12 co-occurrences Sales 20 co-occurrences

Where this tag comes from

Provider tag98
Api tag24
Openapi tag1
Openapi op tag1

Cohort brief

Auto-generated

The 104 providers in the APIs.io catalog tagged Lead Generation, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
104
all scored
Mean Kin Score
37.5
+16.8 vs catalog 20.7
Mean Agent Readiness
22
+12.3 vs catalog 9.7
Spread
2.4–83.3
median 42.3 · σ 22
How the 104 split by band
Exemplar 10Strong 20Developing 27Thin 8Emerging 18Minimal 21
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Access Clarity 52.7 22.3 +30.4 104
Developer Ergonomics 35.4 17.9 +17.5 104
Operational Transparency 24.8 11.3 +13.5 104
Contract Quality 30.3 17.5 +12.8 104
Discoverability 71.2 60.4 +10.8 104
Contract Governance 15 6.4 +8.6 104

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) 42% 16% +26
MCP server (first-party) 32% 7% +25
Agent Skills 0% 0% 0
OAuth scopes 34% 9% +25
Security 99% 88% +11
Arazzo workflows 7% 2% +5
Governance rules 13% 13% 0

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 Salesforce 83.3
  2. 2 ZoomInfo 80.8
  3. 3 LinkedIn 75.1
  4. 4 Coresignal 71.4
  5. 5 Hunter 71.4
  6. 6 Surfe 70.6
  7. 7 Seamless.AI 69.8
  8. 8 Unbounce 68.7
  9. 9 lemlist 68.3
  10. 10 Snov.io 67.8
Top by Agent Readiness
  1. 1 lemlist 63.9
  2. 2 Unbounce 59.6
  3. 3 Seamless.AI 58.7
  4. 4 Gojiberry AI 55.2
  5. 5 Reevo 54.7
  6. 6 Salesforce 52.2
  7. 7 Hunter 51.7
  8. 8 LeadIQ 51.1
  9. 9 Leadpages 50.6
  10. 10 ZoomInfo 49.5
All 104 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.

Work with this as data

Every tag here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for tags

7 MCP tools reach this
  • find_tagsBrowse and filter every tag in the catalog.
  • get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
  • 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.
All 92 tools

Call it yourself

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This tag 
curl "https://apis.io/api/v1/tags/lead-generation"
All tags 
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort 
curl "https://apis.io/api/v1/cohorts/tag/lead-generation"
The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/lead-generation/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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