# Communications

**Canonical:** https://apis.io/providers/communications/  
**Website:** https://apievangelist.com  
**APIs profiled:** 0

An index and topic collection covering Communications Platform as a Service (CPaaS) and messaging-and-voice infrastructure APIs. This network gathers providers offering programmable SMS, MMS, voice, video, transactional and marketing email, chat, push notifications, in-app messaging, and deliverability services. It includes leading CPaaS platforms (Twilio, Vonage, MessageBird/Bird, Sinch, Plivo, Bandwidth, Telnyx, Infobip), transactional email providers (SendGrid, Mailgun, Postmark, Resend, SparkPost, Mailjet, MailerSend, Mailtrap), video and real-time platforms (Agora, Daily.co, LiveKit, Zoom, Dolby), push and in-app messaging (OneSignal, Pusher, Ably, PubNub, Sendbird, Airship, CleverTap), and notification orchestration layers (Courier, Knock, Customer.io, Braze, Iterable). It is distinct from the Bots topic, which covers conversational scripting and chatbot frameworks.

## Kin Score — 8.7 / 100 (minimal)

Scored 2026-10-17 under rubric 0.24.0. Trend: flat (+0.0 from 8.7).

| Facet | Score |
|---|---|
| Discoverability | 48.2 |
| Contract Quality | 14.7 |
| Contract Governance | 0.0 |
| Operational Transparency | 5.3 |
| Developer Ergonomics | 9.5 |
| Access Clarity | 0.0 |

Regulatory layer — **Telecommunications**: 4.2 (matched via tags).

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Use cases (7)

- **Two-Factor Authentication and OTP Delivery** — Applications use SMS, voice, and email APIs to deliver one-time passcodes and verification messages for login, signup, and high-risk action confirmation.
- **Transactional Notifications** — Platforms send order confirmations, shipping updates, password resets, and account alerts through email, SMS, and push APIs as part of core product workflows.
- **Customer Engagement Campaigns** — Marketing teams orchestrate multi-channel email, SMS, and push campaigns using providers like Braze, Iterable, Customer.io, and Klaviyo to drive retention and lifecycle messaging.
- **Live Video and Audio Embeds** — Telehealth, education, and collaboration apps embed branded live video and audio experiences using Daily.co, Agora, LiveKit, Zoom SDKs, and Dolby.
- **Contact Center and Programmable Voice** — Support and sales teams build programmable IVRs, click-to-call, call tracking, and conversational voice flows on Twilio, Vonage, Dialpad, and RingCentral.
- **Realtime Chat and Social Features** — Apps add direct messaging, group chat, presence, and live commenting using Sendbird, Stream, PubNub, Ably, and Pusher.
- **Operational and Incident Alerting** — Engineering and SRE teams page on-call staff and broadcast incident status via SMS, voice, push, and email through Knock, Courier, and CPaaS providers.

## Tags

CPaaS, SMS, MMS, Voice, Email, Push Notifications, Video, Chat, Messaging, Deliverability

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/communications/). Scores are computed from the provider's own public artifacts under a published rubric.