emerging · 1.0 market domain

Phone

Score 20.7 / 100 28 providers 22 APIs Search apis.io →
Variants seen in the corpus: Phonephone

Providers using this tag (28)

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

Exemplar 2 Complete, well-documented, and agent-ready
Amazon PinpointCampaignsCommunicationsEmailMarketing2 APIs81.1TwilioAuthenticationCommunicationsContact CenterEmail40 APIs72.3
Strong 5 Solid coverage with minor gaps
FactsetFinancialFinancial DataInvestment AnalyticsMarket Data142 APIs64.2Salesforce Service Cloud APIsCloudCRMCustomer-ServiceEnterprise1 API60.4SynthflowVoiceVoice AgentsNo-CodeTelephony1 API59.8RB2BIdentity ResolutionVisitor IdentificationB2B DataLead Generation4 APIs58.5ZendeskChatCRMHelp CenterSell76 APIs56.6
Developing 8 Usable, with meaningful gaps to close
SpectrumOutage APIspectrumOutageinternettv2 APIs51.1VerisoulCompanyFraud DetectionIdentity VerificationFake Account Detection8 APIs49.5ZoomChatCollaborationCommunicationsMeetings12 APIs49.5PhonelyArtificial IntelligenceVoice AIVoice AgentsConversational AI2 APIs49.3SEONAML ComplianceDevice IntelligenceDigital FootprintFraud Prevention11 APIs45.7LaFourchetteCompanyConsumerRestaurantReservations2 APIs42.9Google VoiceGoogle VoiceMessagingTelecommunications1 API42.6AutomileFleet ManagementTelematicsGPS TrackingVehicles1 API40.8
Thin 4 Limited public surface area
VisteonAutomotiveConnected CarInfotainmentIoT1 API36.3Bland AIArtificial IntelligenceVoiceAgents1 API34.7SEONAML ComplianceFraud PreventionIdentity VerificationRisk Scoring8 APIs33.9Country.ioCapitalsContinentsCountriesCurrency1 API28.9
Emerging 3 Early or largely undocumented
Cox CommunicationsTelecommunicationsBroadbandCable TVInternet3 APIs20.6Amazon Web ServicesAmazonCloudNetworkIndex377 APIs16.7Slang AiCompanyVoice AIRestaurantConversational AI16.6
Minimal 6 Almost no public developer surface
Cloudmersive ValidatePublic APIs1 API7.6NumlookupPublic APIs1 API7.6Phone ValidationPublic APIs1 API7.6VeriphonePublic APIs1 API7.6Phone SpecificationPublic APIs1 API6.9NumverifyPublic APIs1 API5.7

APIs with this tag (19)

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 1 Complete, well-documented, and agent-ready
Amazon Pinpoint Phone APIThe Phone API from Amazon Pinpoint — 1 operation(s) for phone.81.1
Strong 3 Solid coverage with minor gaps
Service Cloud CTI APIOpen CTI — the JavaScript API that connects a telephony system's softphone to the Service Cloud console, pl...60.4RB2B Enrichment APICredit-metered Enrichment endpoints that take a known identifier — hashed email (MD5), plaintext email, or ...58.5Zendesk Talk APIThe Zendesk Talk API is the reference API for managing Zendesk voice capabilities. It provides endpoints fo...56.6
Developing 4 Usable, with meaningful gaps to close
Verisoul Phone APIThe Phone API from Verisoul — 1 operation(s) for phone.49.5Zoom Phone APIThe Zoom Phone API allows developers to access Zoom Phone functionality to build private services or public...49.5SEON Phone APIThe Phone API from SEON — 1 operation(s) for phone.45.7Automile Phone APIThe Phone API from Automile — 2 operation(s) for phone.40.8
Thin 4 Limited public surface area
Visteon Phone APIPhone call management, contacts, and call history36.3SEON Phone APIThe SEON Phone API unlocks insights into a user's phone number history and social or digital profiles conne...33.9SEON Phone APIThe Phone API from SEON — 1 operation(s) for phone.33.9Country.io Phone APIInternational dialing codes by ISO2 country code.28.9
Emerging 1 Early or largely undocumented
Amazon Web Services Phone APIThe Phone API from Amazon Web Services — 1 operation(s) for phone.16.7
Minimal 6 Almost no public developer surface
Cloudmersive ValidateValidate international phone numbers7.6NumlookupPhone number validation and carrier lookup API with global coverage7.6Phone ValidationValidate phone numbers globally7.6VeriphonePhone number validation & carrier lookup7.6Phone SpecificationRest Api for Phone specifications6.9NumverifyPhone number validation5.7

Score breakdown

Frequency
44.8
log-scaled weighted occurrences
Breadth
0.8
spread across providers
Quality lift
43.6
mean composite of providers using it
Cohesion
4.1
strength of nearest seed neighbor

Related tags

Phone Numbers 5 co-occurrences Calls 5 co-occurrences Voice 9 co-occurrences Email 8 co-occurrences CRM 6 co-occurrences Messaging 6 co-occurrences Application 5 co-occurrences Subscription 5 co-occurrences

Where this tag comes from

Api tag21
Provider tag14
Openapi tag9
Openapi op tag15

Cohort brief

Auto-generated

The 28 providers in the APIs.io catalog tagged Phone, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
28
all scored
Mean Kin Score
36
+15.3 vs catalog 20.7
Mean Agent Readiness
20.8
+11.1 vs catalog 9.7
Spread
5–83.1
median 36.8 · σ 22.1
How the 28 split by band
Exemplar 2Strong 4Developing 8Thin 5Emerging 3Minimal 6
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 38.2 17.5 +20.7 28
Developer Ergonomics 36.3 17.9 +18.4 28
Access Clarity 36.9 22.3 +14.6 28
Operational Transparency 21.7 11.3 +10.4 28
Contract Governance 15.5 6.4 +9.1 28
Discoverability 67.3 60.4 +6.9 28

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) 29% 16% +13
MCP server (first-party) 14% 7% +7
Agent Skills 0% 0% 0
OAuth scopes 21% 9% +12
Security 93% 88% +5
Arazzo workflows 14% 2% +12
Governance rules 36% 13% +23

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 Amazon Pinpoint 83.1
  2. 2 Twilio 73.4
  3. 3 Factset 64.8
  4. 4 Synthflow 61.8
  5. 5 Zendesk 58.1
  6. 6 RB2B 57.7
  7. 7 Zoom 51.1
  8. 8 Verisoul 50.9
  9. 9 Phonely 48.7
  10. 10 SpectrumOutage API 47.7
Top by Agent Readiness
  1. 1 Factset 52.8
  2. 2 LaFourchette 47.2
  3. 3 Twilio 38.5
  4. 4 Synthflow 36.9
  5. 5 Zendesk 35.9
  6. 6 Amazon Pinpoint 35.4
  7. 7 Zoom 34.1
  8. 8 Verisoul 32.6
  9. 9 RB2B 26.1
  10. 10 Phonely 25.9
All 28 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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  • 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.
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The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/phone/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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