Applications › VoIP, Phone & Contact Center

VoIP, Phone & Contact Center

What 6 leading VoIP, Phone & Contact Center apps are built on: the providers each one ships in its code or lists as an integration, grouped by layer and capability, and joined to the catalog.

6 reference apps 95 providers 39 observed in code 56 declared only 98.9% in the catalog 51.2 mean Kin Score 40 with a verified MCP server

How to read this. observed the integration ships in the app (SDK in a dependency file, source code, or an Android build analysis). declared the app names the integration itself (README, integrations page, store listing). Every row links the source it was read from. Providers not yet in the catalog are marked queued for profiling. Blueprint by API Evangelist, CC BY-NC-SA 4.0. Capabilities marked Turbo EA come from Turbo EA Capabilities by Vincent Verdet, CC BY 4.0 (notice); those marked API Evangelist extension are CC BY-NC-SA 4.0. Android build analyses: Exodus Privacy (reports.exodus-privacy.eu.org).

domain layer 12 capabilities

Customer Relationship Management 15 providers · BC-420 · Turbo EA

Customer Relationship Management capability

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
HubSpot	declared [1] [2] [3]	Aircall, Dialpad, JustCall, Talkdesk	94.8 exemplar	52.7 agent-ready	verified
Salesforce	declared [1] [2] [3]	Aircall, Dialpad, JustCall, Talkdesk	90.4 exemplar	54.7 agent-ready	verified
Zoho CRM	declared [1] [2] [3]	Aircall, JustCall, Talkdesk	86.0 exemplar	44.2 agent-ready	none found
Pipedrive	declared [1] [2] [3]	Aircall, JustCall, Talkdesk	54.6 strong	29.3 agent-ready	none found
ActiveCampaign	declared [1] [2]	Aircall, JustCall	78.2 exemplar	53.7 agent-ready	documented
HighLevel	declared [1] [2]	Aircall, JustCall	68.5 exemplar	38.3 agent-ready	verified
Zendesk Sell	declared [1] [2]	Aircall, JustCall	68.5 exemplar	30.1 agent-ready	none found
Keap	declared [1] [2]	JustCall, Talkdesk	68.1 exemplar	45.4 agent-ready	none found
Microsoft Dynamics	declared [1] [2]	Aircall, Talkdesk	49.4 developing	28.1 agent-aware	verified
Copper	declared [1] [2]	Aircall, JustCall	47.7 developing	24.5 agent-aware	none found
Freshsales	declared [1] [2]	Aircall, JustCall	34.5 thin	19.0 agent-aware	none found
monday.com	declared [1] [2]	Aircall, JustCall	31.9 thin	50.3 agent-ready	verified
Odoo	declared [1] [2]	Aircall, JustCall	26.2 thin	17.9 agent-aware	none found
Attio	declared [1] [2]	Aircall, JustCall	20.3 emerging	45.3 agent-ready	verified
Close	declared [1]	JustCall	75.3 exemplar	60.0 agent-ready	verified

Customer Service Management 9 providers · BC-430 · Turbo EA

Customer Service Management capability

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
Zendesk CTI	declared [1] [2] [3]	Aircall, Dialpad, JustCall, Talkdesk	72.8 exemplar	35.0 agent-ready	none found
Intercom	declared [1] [2] [3]	Aircall, JustCall, Talkdesk	52.9 developing	31.7 agent-ready	verified
Help Scout	declared [1] [2] [3]	Aircall, JustCall, Talkdesk	51.7 developing	25.4 agent-aware	none found
Front	declared [1] [2] [3]	Aircall, JustCall, Talkdesk	51.3 developing	27.0 agent-aware	documented
Freshdesk	declared [1] [2] [3]	Aircall, JustCall, Talkdesk	30.7 thin	29.8 agent-ready	none found
Kustomer	declared [1] [2] [3]	Aircall, JustCall, Talkdesk	28.8 thin	19.0 agent-aware	none found
Gorgias	declared [1] [2]	Aircall, JustCall	40.2 developing	25.9 agent-aware	verified
Zoho Desk	declared [1] [2]	Aircall, JustCall	25.7 emerging	17.3 agent-aware	verified
Nicereply	declared [1]	Aircall	14.0 emerging	0.6 human-only	none found

Text-to-Speech 19 providers · AE-110.30.20 · API Evangelist extension

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
ElevenLabs	observed [1] [2]	Fonoster, jambonz	82.0 exemplar	56.3 agent-ready	verified
Google	observed [1] [2]	Fonoster, jambonz	51.3 developing	17.9 agent-aware	none found
Deepgram	observed [1] [2]	Fonoster, jambonz	50.4 developing	36.2 agent-ready	verified
Microsoft Azure Speech	observed [1] [2]	Fonoster, jambonz	38.0 thin	17.6 agent-aware	verified
OpenAI (Whisper/TTS)	observed [1]	jambonz	83.0 exemplar	58.4 agent-native	verified
AWS Polly	observed [1]	jambonz	66.9 exemplar	32.0 agent-ready	none found
KugelAudio	observed [1]	jambonz	55.8 strong	29.3 agent-ready	none found
Gradium	observed [1]	jambonz	54.9 strong	29.8 agent-ready	none found
Mistral	observed [1]	jambonz	47.7 developing	28.8 agent-ready	none found
Cartesia	observed [1]	jambonz	37.9 thin	23.7 agent-aware	verified
WellSaid Labs	observed [1]	jambonz	33.9 thin	19.0 agent-aware	verified
xAI	observed [1]	jambonz	32.8 thin	38.8 agent-ready	none found
Resemble AI	observed [1]	jambonz	31.1 thin	26.1 agent-aware	verified
Fish Audio	observed [1]	jambonz	29.7 thin	43.9 agent-ready	none found
Inworld	observed [1]	jambonz	29.7 thin	22.7 agent-aware	none found
Murf	observed [1]	jambonz	28.3 thin	16.6 agent-aware	verified
Speechify	observed [1]	jambonz	25.5 emerging	19.0 agent-aware	none found
Rime Labs	observed [1]	jambonz	18.3 emerging	38.5 agent-ready	none found
NVIDIA Riva	observed [1]	jambonz	11.9 emerging	4.2 human-only	none found

Speech-to-Text 17 providers · AE-110.30.10 · API Evangelist extension

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
Google	observed [1] [2]	Fonoster, jambonz	51.5 developing	24.6 agent-aware	none found
Deepgram	observed [1] [2]	Fonoster, jambonz	50.4 developing	36.2 agent-ready	verified
OpenAI	observed [1]	jambonz	83.0 exemplar	58.4 agent-native	verified
AWS (Transcribe)	observed [1]	jambonz	64.5 strong	25.3 agent-aware	none found
Gladia	observed [1]	jambonz	49.6 developing	33.9 agent-ready	verified
AssemblyAI	observed [1]	jambonz	46.5 developing	29.5 agent-ready	verified
Speechmatics	observed [1]	jambonz	46.5 developing	26.8 agent-aware	none found
Microsoft Azure Speech	observed [1]	jambonz	38.0 thin	17.6 agent-aware	verified
Cartesia	observed [1]	jambonz	37.9 thin	23.7 agent-aware	verified
Soniox	observed [1]	jambonz	31.9 thin	5.4 agent-aware	—
Voxist	observed [1]	jambonz	29.3 thin	21.6 agent-aware	—
Cobalt Speech	observed [1]	jambonz	26.2 thin	17.3 agent-aware	—
Nuance	observed [1]	jambonz	25.1 emerging	2.5 human-only	none found
IBM Watson	observed [1]	jambonz	19.2 emerging	0.6 human-only	none found
Houndify (SoundHound)	observed [1]	jambonz	18.9 emerging	2.5 human-only	none found
NVIDIA Riva	observed [1]	jambonz	11.9 emerging	4.2 human-only	none found
Verbio queued for profiling	observed [1]	jambonz	—	—	—

Sales Management 3 providers · BC-410 · Turbo EA

Sales Management capability

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
Outreach	declared [1] [2] [3]	Aircall, JustCall, Talkdesk	79.3 exemplar	53.1 agent-ready	none found
Salesloft	declared [1] [2]	Aircall, JustCall	62.5 strong	45.4 agent-native	none found
Apollo.io	declared [1]	JustCall	63.6 strong	59.2 agent-ready	verified

Meeting Notes & Conversation Intelligence 3 providers · AE-110.30.40 · API Evangelist extension

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
Fireflies	declared [1] [2]	Aircall, JustCall	72.7 exemplar	60.4 agent-ready	verified
Gong	declared [1] [2]	Aircall, JustCall	65.5 strong	55.5 agent-ready	none found
Avoma	declared [1]	Aircall	57.6 strong	44.6 agent-ready	documented

Healthcare Interoperability Operations 3 providers · BC-2900.60 · Turbo EA

Healthcare Interoperability Operations capability

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
athenahealth	declared [1]	Talkdesk	67.0 exemplar	30.9 agent-ready	none found
Epic	declared [1]	Talkdesk	62.5 strong	37.6 agent-ready	none found
Oracle Cerner	declared [1]	Talkdesk	44.7 developing	30.1 agent-ready	none found

Programmable Voice 2 providers · AE-150.50.10 · API Evangelist extension

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
Twilio	observed [1]	Fonoster	93.2 exemplar	56.4 agent-native	verified
Zoom Phone	declared [1]	Talkdesk	67.9 exemplar	54.4 agent-ready	none found

Contact Centre Workforce Management 1 providers · BC-430.30.10 · Turbo EA

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
Verint (WFM Cloud)	declared [1]	Talkdesk	8.8 minimal	0.6 human-only	none found

IT Service Management 1 providers · BC-600.30 · Turbo EA

IT Service Management capability

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
ServiceNow	declared [1]	Talkdesk	66.0 strong	43.2 agent-ready	none found

Insurance Claims Management 1 providers · BC-2160 · Turbo EA

Insurance Claims Management capability

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
Guidewire ClaimCenter	declared [1]	Talkdesk	63.6 strong	42.0 agent-native	none found

Quality Monitoring and Coaching 1 providers · BC-430.30.30 · Turbo EA

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
Klaus	declared [1]	Aircall	61.9 strong	25.3 agent-aware	none found

common layer 12 capabilities

Workflow Automation & iPaaS 5 providers · AE-910 · API Evangelist extension

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
Zapier	declared [1] [2]	Aircall, JustCall	73.7 exemplar	66.2 agent-ready	verified
Pipedream	declared [1] [2]	Aircall, JustCall	59.5 strong	31.3 agent-ready	verified
Make	declared [1] [2]	Aircall, JustCall	41.4 developing	43.9 agent-ready	verified
Tray.io	declared [1]	Aircall	89.4 exemplar	61.6 agent-ready	documented
Workato	declared [1]	Talkdesk	70.4 exemplar	52.2 agent-ready	verified

Mailbox & Calendar Sync 4 providers · AE-150.80 · API Evangelist extension

Mailbox & Calendar Sync capability

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
Google Calendar	declared [1] [2]	Dialpad, JustCall	48.8 developing	20.7 agent-aware	verified
Google Contacts	declared [1] [2]	JustCall, Talkdesk	45.6 developing	24.6 agent-aware	verified
Microsoft Outlook	declared [1]	JustCall	65.9 strong	48.6 agent-ready	verified
Gmail	declared [1]	Dialpad	44.1 developing	19.6 agent-aware	verified

Team Chat Bridging 2 providers · AE-150.40.10 · API Evangelist extension

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
Slack	declared [1] [2] [3]	Aircall, JustCall, Talkdesk	73.2 exemplar	38.7 agent-ready	verified
Microsoft Teams	declared [1] [2]	Aircall, Talkdesk	56.2 strong	34.2 agent-ready	none found

Analytics & BI Management 3 providers · BC-610.50 · Turbo EA

Analytics & BI Management capability

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
Fivetran	declared [1] [2]	Aircall, JustCall	34.6 thin	36.4 agent-ready	verified
Segment	declared [1]	Aircall	43.8 developing	26.8 agent-aware	none found
Geckoboard	declared [1]	Aircall	34.0 thin	19.0 agent-aware	verified

SMS 2 providers · AE-150.20.10 · API Evangelist extension

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
Twilio	observed [1]	Fonoster	93.2 exemplar	56.4 agent-native	verified
Sinch Engage	declared [1]	Aircall	71.7 exemplar	61.2 agent-native	verified

Observability Management 1 providers · BC-4220.20 · Turbo EA

Observability Management capability

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
Firebase	observed [1]	Aircall	50.3 developing	14.2 agent-aware	verified

Payment Processing Management 1 providers · BC-1340.20 · Turbo EA

Payment Processing Management capability

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
Stripe	observed [1]	Fonoster	82.7 exemplar	58.5 agent-native	verified

Product Usage Analytics 1 providers · BC-4280.30 · Turbo EA

Product Usage Analytics capability

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
Firebase	observed [1]	Aircall	50.3 developing	14.2 agent-aware	verified

Realtime Messaging 1 providers · AE-150.70 · API Evangelist extension

Realtime Messaging capability

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
Pusher	observed [1]	Aircall	38.6 thin	20.7 agent-aware	none found

Scheduling & Appointment Management 1 providers · BC-2800.10 · Turbo EA

Scheduling & Appointment Management capability

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
Calendly	declared [1]	JustCall	42.4 developing	48.1 agent-ready	documented

Video Calling 1 providers · AE-150.60 · API Evangelist extension

Video Calling capability

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
Zoom	declared [1]	Talkdesk	56.2 strong	55.2 agent-ready	verified

WhatsApp & OTT Messaging 1 providers · AE-150.20.20 · API Evangelist extension

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
WhatsApp Messaging Channel	declared [1]	Aircall	55.4 strong	29.6 agent-ready	none found

agent layer 1 capabilities

Hosted LLM Inference 5 providers · AE-110.10.10 · API Evangelist extension

Provider	Evidence	Apps	Kin Score	Agent readiness	MCP
@langchain/anthropic	observed [1]	Fonoster	89.0 exemplar	47.6 agent-ready	verified
@langchain/openai	observed [1]	Fonoster	83.0 exemplar	58.4 agent-native	verified
@langchain/google-genai	observed [1]	Fonoster	55.1 strong	31.3 agent-ready	none found
@langchain/ollama	observed [1]	Fonoster	36.3 thin	24.4 agent-aware	none found
@langchain/groq	observed [1]	Fonoster	32.9 thin	21.6 agent-aware	verified

Reference apps

jambonz self-hosted

https://github.com/jambonz/jambonz-feature-server

36 observed · 0 declared

observed ships the AssemblyAI SDK or integration code source
observed ships the AWS (Transcribe) SDK or integration code source
observed ships the AWS Polly SDK or integration code source
observed ships the Cartesia SDK or integration code source
observed ships the Cartesia SDK or integration code source
observed ships the Cobalt Speech SDK or integration code source
observed ships the Deepgram SDK or integration code source
observed ships the Deepgram SDK or integration code source
observed ships the ElevenLabs SDK or integration code source
observed ships the Fish Audio SDK or integration code source
observed ships the Gladia SDK or integration code source
observed ships the Google SDK or integration code source
observed ships the Google SDK or integration code source
observed ships the Gradium SDK or integration code source
observed ships the Houndify (SoundHound) SDK or integration code source
observed ships the IBM Watson SDK or integration code source
observed ships the Inworld SDK or integration code source
observed ships the KugelAudio SDK or integration code source
observed ships the Microsoft Azure Speech SDK or integration code source
observed ships the Microsoft Azure Speech SDK or integration code source
observed ships the Mistral SDK or integration code source
observed ships the Murf SDK or integration code source
observed ships the Nuance SDK or integration code source
observed ships the NVIDIA Riva SDK or integration code source
observed ships the NVIDIA Riva SDK or integration code source
observed ships the OpenAI SDK or integration code source
observed ships the OpenAI (Whisper/TTS) SDK or integration code source
observed ships the Resemble AI SDK or integration code source
observed ships the Rime Labs SDK or integration code source
observed ships the Soniox SDK or integration code source
observed ships the Speechify SDK or integration code source
observed ships the Speechmatics SDK or integration code source
observed ships the Verbio SDK or integration code source
observed ships the Voxist SDK or integration code source
observed ships the WellSaid Labs SDK or integration code source
observed ships the xAI SDK or integration code source

Read from: dependency manifest, dependency manifest, source code, source code

Fonoster self-hosted

https://github.com/fonoster/fonoster

14 observed · 0 declared

observed ships the @langchain/anthropic SDK or integration code source
observed ships the @langchain/google-genai SDK or integration code source
observed ships the @langchain/groq SDK or integration code source
observed ships the @langchain/ollama SDK or integration code source
observed ships the @langchain/openai SDK or integration code source
observed ships the Azure SDK or integration code source
observed ships the Deepgram SDK or integration code source
observed ships the Deepgram SDK or integration code source
observed ships the ElevenLabs SDK or integration code source
observed ships the Google SDK or integration code source
observed ships the Google SDK or integration code source
observed ships the Stripe SDK or integration code source
observed ships the Twilio SDK or integration code source
observed ships the Twilio SDK or integration code source

Read from: dependency manifest, source code, source code, source code, source code, source code, source code

Aircall commercial

https://aircall.io/

3 observed · 39 declared

observed ships the Firebase SDK or integration code source
observed ships the Firebase SDK or integration code source
observed ships the Pusher SDK or integration code source
declared lists ActiveCampaign as an integration source
declared lists Attio as an integration source
declared lists Avoma as an integration source
declared lists Copper as an integration source
declared lists Fireflies as an integration source
declared lists Fivetran as an integration source
declared lists Freshdesk as an integration source
declared lists Freshsales as an integration source
declared lists Front as an integration source
declared lists Geckoboard as an integration source
declared lists Gong as an integration source
declared lists Gorgias as an integration source
declared lists Help Scout as an integration source
declared lists HighLevel as an integration source
declared lists HubSpot as an integration source
declared lists Intercom as an integration source
declared lists Klaus as an integration source
declared lists Kustomer as an integration source
declared lists Make as an integration source
declared lists Microsoft Dynamics as an integration source
declared lists Microsoft Teams as an integration source
declared lists monday.com as an integration source
declared lists Nicereply as an integration source
declared lists Odoo as an integration source
declared lists Outreach as an integration source
declared lists Pipedream as an integration source
declared lists Pipedrive as an integration source
declared lists Salesforce as an integration source
declared lists Salesloft as an integration source
declared lists Segment as an integration source
declared lists Sinch Engage as an integration source
declared lists Slack as an integration source
declared lists Tray.io as an integration source
declared lists WhatsApp Messaging Channel as an integration source
declared lists Zapier as an integration source
declared lists Zendesk CTI as an integration source
declared lists Zendesk Sell as an integration source
declared lists Zoho CRM as an integration source
declared lists Zoho Desk as an integration source

Read from: Android build analysis (Exodus Privacy, reports.exodus-privacy.eu.org), integrations page

JustCall commercial

https://justcall.io/

0 observed · 36 declared

declared lists ActiveCampaign as an integration source
declared lists Apollo.io as an integration source
declared lists Attio as an integration source
declared lists Calendly as an integration source
declared lists Close as an integration source
declared lists Copper as an integration source
declared lists Fireflies.ai as an integration source
declared lists Fivetran as an integration source
declared lists Freshdesk as an integration source
declared lists Freshsales as an integration source
declared lists Front as an integration source
declared lists Gong as an integration source
declared lists Google Calendar as an integration source
declared lists Google Contacts as an integration source
declared lists Gorgias as an integration source
declared lists Help Scout as an integration source
declared lists HighLevel as an integration source
declared lists HubSpot as an integration source
declared lists Intercom as an integration source
declared lists Keap as an integration source
declared lists Kustomer as an integration source
declared lists Make as an integration source
declared lists Microsoft Outlook as an integration source
declared lists monday.com as an integration source
declared lists Odoo as an integration source
declared lists Outreach as an integration source
declared lists Pipedream as an integration source
declared lists Pipedrive as an integration source
declared lists Salesforce as an integration source
declared lists Salesloft as an integration source
declared lists Slack as an integration source
declared lists Zapier as an integration source
declared lists Zendesk Sell as an integration source
declared lists Zendesk Support as an integration source
declared lists Zoho CRM as an integration source
declared lists Zoho Desk as an integration source

Read from: integrations page

Talkdesk commercial

https://www.talkdesk.com/

0 observed · 25 declared

declared lists athenahealth as an integration source
declared lists Epic as an integration source
declared lists Freshdesk as an integration source
declared lists Front as an integration source
declared lists Google Contacts as an integration source
declared lists Guidewire ClaimCenter as an integration source
declared lists Help Scout as an integration source
declared lists HubSpot as an integration source
declared lists Intercom as an integration source
declared lists Keap as an integration source
declared lists Kustomer as an integration source
declared lists Microsoft Dynamics 365 as an integration source
declared lists Microsoft Teams as an integration source
declared lists Oracle Cerner as an integration source
declared lists Outreach as an integration source
declared lists Pipedrive as an integration source
declared lists Salesforce as an integration source
declared lists ServiceNow as an integration source
declared lists Slack as an integration source
declared lists Verint (WFM Cloud) as an integration source
declared lists Workato as an integration source
declared lists Zendesk as an integration source
declared lists Zoho CRM as an integration source
declared lists Zoom as an integration source
declared lists Zoom Phone as an integration source

Read from: integrations page

Dialpad commercial

https://www.dialpad.com/

0 observed · 5 declared

declared lists Gmail as an integration source
declared lists Google Calendar as an integration source
declared lists HubSpot as an integration source
declared lists Salesforce as an integration source
declared lists Zendesk as an integration source

Read from: integrations page

What these apps expose to agents

jambonz: feature-server depends on @modelcontextprotocol/sdk (MCP client for LLM voice agents) observed source
Fonoster: ships its own MCP server module (mods/mcp) and an LLM voice-agent runtime (Autopilot) observed source

Where these apps are listed

apple-app-store: Business
google-play: Communication
google-play: Business
awesome-selfhosted: Communication - SIP
salesforce-appexchange: Customer Service
hubspot-marketplace: Calling
zapier: Phone & SMS