established · 0.0 market domain

Telephony

Score 26.3 / 100 54 providers +16 via APIs 32 APIs Search apis.io →

Providers using this tag (54)

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

Exemplar 2 Complete, well-documented, and agent-ready
VapiArtificial IntelligenceVoice AIVoice AgentsConversational AI15 APIs73.6SignalWireCompanyCommunicationsCPaaSVoice4 APIs68.9
Strong 14 Solid coverage with minor gaps
WeaveCompanyCommunicationsMessagingPayments1 API64.1GridspaceCompanyVoice AIConversational AIVoice Agents1 API62.0SyllableCompanyArtificial IntelligenceAI AgentsVoice1 API61.9KixieCompanySales EngagementVoice3 APIs60.7DialNexaVoice AIAI AgentsLead Qualification2 APIs59.8CloudTalkCompanyCommunicationsVoiceVoIP1 API58.9SynthflowVoiceVoice AgentsNo-Code1 API58.9GenesysCompanySoftwareContact CenterCustomer Experience1 API58.1Neutrino APIData ValidationData ToolsCommunications2 APIs57.6The Mobile First CompanyCompanyCommunicationsVoice1 API57.3OpenPhoneCompanyCommunicationsVoiceSMS2 APIs54.8VOYGRCompanyLocation IntelligencePOI DataData Enrichment1 API54.8Bright PatternCompanyContact CenterCCaaSCustomer Experience11 APIs54.7ThoughtlyVoice AIChat AIConversational AIAI Agents1 API54.7
Developing 18 Usable, with meaningful gaps to close
DailyVideoAudioWebRTCReal-Time Communication1 API54.2BandwidthCommunicationsCPaaSVoiceMessaging3 APIs53.7VoiceGenieCompanyVoice AIConversational AISales Automation1 API52.7PhonicCompanyArtificial IntelligenceVoice AIConversational AI1 API52.1InvocaCompanyArtificial IntelligenceCall TrackingConversation Intelligence1 API51.9CallRailCall TrackingConversation IntelligenceMarketing AttributionLead Tracking1 API51.3Phone ComCompanyVoIPBusiness Phone1 API50.5FixieCompanyVoice AIConversational AIReal-Time1 API50.3SpekoVoiceVoice AISpeech-to-TextText-to-Speech1 API50.3NextivaCompanyCommunicationsVoiceContact Center5 APIs49.8BolnaCompanyArtificial IntelligenceVoice AIConversational AI1 API49.6NetomiCompanyArtificial IntelligenceAgentic AICustomer Experience1 API49.3PhonelyArtificial IntelligenceVoice AIVoice AgentsConversational AI2 APIs48.4OrumCompanyArtificial IntelligenceSalesSales Engagement47.6AgentPhoneCompanyPhone NumbersSMS1 API43.8HappyrobotAI AgentsAgent OrchestrationVoice AIConversational AI2 APIs42.3Cisco Voice PortalContact CenterIVRVoice4 APIs41.6Sarj AI Developer APIVoice AIVoice AgentsConversational AIArabic AI4 APIs41.5
Thin 13 Limited public surface area
BurnerCompanyPhone NumbersSMSMMS1 API39.2RainbowCommunicationsCPaaSChatVoice3 APIs39.2Bitrix24CRMCollaborationProject ManagementTask1 API39.0WazoVoIPUnified CommunicationsUCaaS25 APIs38.2VocodeVoice AIVoice AgentsConversational AI1 API37.2JustCallVoiceSMSCloud PhoneContact Center1 API35.8TelefonieCall RecordingCPaaSMessagingNumber Provisioning4 APIs34.7TelefonCall RecordingCommunicationsCPaaSGlobal Coverage4 APIs34.5TelefoonBelgiumCPaaSEU Data ResidencyEurope3 APIs34.3TenfoldCompanyCTIContact Center1 API30.8NewVoiceMediaCompanyCloudContact CenterCCaaS1 API28.1TalkdeskContact CenterCCaaSVoiceWebhook1 API27.3Samora AICompanyVoice AgentsConversational AIVoice AI1 API26.2
Emerging 3 Early or largely undocumented
ParloaAgentsArtificial IntelligenceCall CenterCCaaS2 APIs19.2BesideCompanySoftwareCommunicationsVoice16.1Callab AIVoice AIConversational AIContact Center1 API14.9
Minimal 4 Almost no public developer surface
DialupCompanyVoiceSocialCommunications9.2Chimelabs Holdings PTY LTDCompanyArtificial IntelligenceVoiceReceptionist8.5VonBoxCompanyCommunicationsMessaging6.1Brooktrout TechnologyCompanyFaxVoice5.0

APIs with this tag (32)

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 5 Complete, well-documented, and agent-ready
Salesforce Service Cloud Voice APIThe Salesforce Service Cloud Voice API provides Telephony Integration REST API and Voice Toolkit API for pr...87.5Leadping Telephony APIProvides shared authentication and bootstrap data for Leadping telephony clients. Use this endpoint to obta...79.6Regal Call Handoffs APIRetrieve routing instructions and call metadata after a Regal AI voice agent leaves a live call. The respon...77.1SendPulse Telephony APIThe Telephony API from SendPulse — 4 operation(s) for telephony.74.4Service Cloud CTI APIOpen CTI — the JavaScript API that connects a telephony system's softphone to the Service Cloud console, pl...68.6
Strong 9 Solid coverage with minor gaps
Swisscom Voice Mail APILegacy Voice API for listing and retrieving recent voicemail messages for a Swisscom MSISDN, secured by OAu...64.9Swisscom Voice VoIP APILegacy Voice API cluster for controlling a Swisscom VoIP subscriber — placing and listing calls, managing c...64.9ServiceNow Openframe APIThe ServiceNow Openframe API provides REST endpoints that enable Contact Center as a Service (CCaaS) provid...60.7ServiceNow Voice Interaction Resource APIThe ServiceNow Voice Interaction Resource API provides REST endpoints for integrating telephony and voice s...60.7Apollo.io Calls APIPhone-call records — log, search and update dialer activity. 3 operation(s) from the published Apollo OpenAPI.60.1Genesys Telephony APITelephony providers and configuration58.1Neutrino API Telephony APIAPIs for live telephony57.6Webex Telephony APIThe Telephony API from Webex — 1 operation(s) for telephony.55.8Voygr Calls APIProgrammatic outbound phone calls executed by an AI voice agent. Submit a task either as a plain-language b...54.8
Developing 5 Usable, with meaningful gaps to close
phone-com-apiPhone.com v4 ("Phoenix") JSON REST API for managing accounts, extensions, devices, phone numbers, call rout...50.5Speko Telephony APIThe Telephony API from Speko — 22 operation(s) for telephony.50.3Bolna Voice AI APIREST API for building and operating conversational voice AI agents — create and manage agents, place outbou...49.6Service Cloud Voice Telephony Integration APIREST API for integrating telephony systems with Service Cloud Voice, enabling programmatic management of vo...49.4Phonely Agents APIManage Phonely voice agents programmatically. Retrieve a single agent or list all agents for a user, and up...48.4
Thin 10 Limited public surface area
Burner APIOAuth 2.0 REST API for programmatic access to Burner line management, messaging (SMS/MMS) and configuration...39.2Transports (WebRTC/WebSocket)Realtime media transport layer of the framework. Bidirectional audio, video, and data flow over Daily WebRT...39.2Bitrix24 REST APITenant-scoped REST API for managing CRM entities, deals, leads, tasks, calendars, telephony, disk files, us...39.0Bitrix24 Telephony APIThe Telephony API from Bitrix24 — 30 operation(s) for telephony.39.0Wazo Phone Provisioning API (wazo-provd)Phone auto-provisioning service. Manages device plugins, configuration templates, device registrations, DHC...38.2Wazo Websocket Event Stream (wazo-websocketd)WebSocket gateway onto the Wazo internal event bus. An authenticated client subscribes to named platform ev...38.2iX Hello Customer v2 Outbound Calling APIPlaces outbound PSTN and SIP voice calls programmatically and runs an authored iX Hello flow on the call. T...38.0JustCall REST APIREST API for placing calls, sending SMS and MMS messages, managing contacts, phone numbers, users, and call...35.8LiveKit SIP (Telephony) APISIP integration for inbound and outbound PSTN calls bridged into LiveKit rooms.32.2DealerSocket CTI & Activity Logging APIInbound call-tracking and activity-logging surface. CTI Direct Post logs inbound and outbound call informat...30.5
Emerging 3 Early or largely undocumented
SystmOne Telephony APITPP's Telephony API for integrating telephony systems with SystmOne, supporting computer-telephony workflow...24.5Webex Calling APICloud calling capabilities including call control, dial plans, voicemail, voice portals, queues, hunt group...22.8Callab AI APICallab AI's REST API, documented at docs.callab.ai/api-reference, is organized around REST principles with ...14.9

Companies reaching this through an API (16)

These companies publish an API, specification or operation carrying “Telephony” 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.

Apollo.io Cisco Collaboration Hybrid Solutions Concentrix DealerSocket Leadping LiveKit Pipecat Regal Salesforce Salesforce Service Cloud Salesforce Service Cloud APIs SendPulse ServiceNow Swisscom TPP (SystmOne) Webex

Score breakdown

Frequency
54.8
log-scaled weighted occurrences
Breadth
1.5
spread across providers
Quality lift
49.7
mean composite of providers using it
Cohesion
15.4
strength of nearest seed neighbor

Related tags

Calls 24 co-occurrences Contact Center 26 co-occurrences Phone Numbers 14 co-occurrences Voice Agents 12 co-occurrences Voice 37 co-occurrences Call Center 9 co-occurrences Voice AI 17 co-occurrences SIP 8 co-occurrences

Where this tag comes from

Provider tag54
Api tag32
Openapi tag6
Openapi op tag47

Cohort brief

Auto-generated

The 53 providers in the APIs.io catalog tagged Telephony, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
53
all scored
Mean Kin Score
44.5
+20.6 vs catalog 23.9
Mean Agent Readiness
28.6
+16.6 vs catalog 12
Spread
6.1–73.6
median 49.6 · σ 15.6
How the 53 split by band
Exemplar 2Strong 14Developing 18Thin 13Emerging 3Minimal 3
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 50.1 19.8 +30.3 53
Developer Ergonomics 46.8 23.4 +23.4 53
Operational Transparency 31.3 14 +17.3 53
Access Clarity 43.5 26.5 +17 53
Discoverability 73.1 61.2 +11.9 53
Contract Governance 11.6 6.4 +5.2 53

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) 28% 10% +18
MCP server (first-party) 30% 13% +17
Agent Skills 0% 0% 0
OAuth scopes 19% 11% +8
Security 100% 97% +3
Arazzo workflows 4% 2% +2
Governance rules 19% 14% +5

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 Vapi 73.6
  2. 2 SignalWire 68.9
  3. 3 Weave 64.1
  4. 4 Gridspace 62
  5. 5 Syllable 61.9
  6. 6 Kixie 60.7
  7. 7 DialNexa 59.8
  8. 8 CloudTalk 58.9
  9. 9 Synthflow 58.9
  10. 10 Genesys 58.1
Top by Agent Readiness
  1. 1 Sarj AI Developer API 62.9
  2. 2 Genesys 58.7
  3. 3 The Mobile First Company 52.9
  4. 4 Happyrobot 51.2
  5. 5 DialNexa 49.9
  6. 6 AgentPhone 48.9
  7. 7 Speko 44.4
  8. 8 Synthflow 42.1
  9. 9 Phonic 40.8
  10. 10 SignalWire 37.6
All 54 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 15 September 2026, across 27661 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

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MCP server

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

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