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APIs/Communications

Communications APIs

Explore APIs in this category. Connect any of them to your AI agent through Jentic.

Browse Communications APIs

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Slack Web API

Send messages, manage channels, upload files, and administer workspaces through 169 HTTP RPC-style endpoints. Supports real-time messaging, threaded conversations, emoji reactions, file sharing, user group management, app installation administration, and granular OAuth 2.0 scope-based permissions across Slack workspaces.

Google Gmail API

Send, receive, and organize email programmatically through Gmail mailboxes with support for threads, labels, drafts, and push notifications. Access 1.8 billion Gmail accounts' messaging infrastructure including attachment handling, search filtering, and real-time change notifications via pub/sub watches. Supports batch operations for bulk message management and granular OAuth scopes for least-privilege access control.

Twilio REST API

Send and receive SMS and MMS messages, initiate and control voice calls, manage phone numbers, and handle conference calls across 180+ countries. Provides programmable communication building blocks including call recordings, transcriptions, SIP trunking, and queue management. Supports both domestic and international messaging with media attachments and delivery status callbacks.

Sendgrid Twilio SendGrid Mail API

Send transactional and marketing emails at scale over HTTP with support for templates, categories, open and click tracking, and batch scheduling. Group mail sends into batches that can be scheduled, paused, or cancelled by batch ID. Supports global and EU-regional endpoints for data residency compliance.

Singaporechatbots Sg Facility Chatbot API documentation.

FacilityBot API for facility management, fault reporting, and building maintenance. The API exposes 1320 endpoints.

Telnyx API

Deliver SMS, MMS, voice calls, fax, SIP trunking, and AI-powered call control through a unified API with 713 endpoints. Purchase and manage phone numbers across 60+ countries, configure messaging profiles and campaigns for 10DLC compliance, and run AI assistants on live calls. Includes embedded AI features for chat completions, embeddings, transcription, and fine-tuning alongside core telephony services.

Aswat Ziwo API

Ziwo is a cloud contact-centre platform from Aswat that connects real or virtual agents to phone numbers across more than 150 countries, with prebuilt CRM plugins for Salesforce, HubSpot, Zendesk, and others. The API exposes the full operational surface of a contact centre - authentication and session management, agent and queue administration, call recording and transcription, number provisioning, WhatsApp and SMS channels, IVR configuration, and reporting. It is sized for production telephony deployments rather than light integrations, with hundreds of endpoints covering both admin and supervisor workflows.

Smith Langchain LangSmith

The LangSmith API is used to programmatically create and manage LangSmith resources. Host https://api.smith.langchain.com Authentication To authenticate with the LangSmith API, set the `X-Api-Key` header to a valid [LangSmith API key](https://docs.langchain.com/langsmith/create-account-api-key#create-an-api-key). The API exposes 440 endpoints secured with apiKey, bearer authentication.

Sellsy API

Find out the [Postman collections](dist/postman/CollectionsApiV2.json) with the required [environment variables](dist/postman/Environment.json) Find out the [Changelog](changelog.html) Errors The errors are returned in JSON with the following format: The `details` field can contain an object that details the error. It is used in particular during validation to return the invalid fields | HTTP Code. The API exposes 351 endpoints secured with oauth2 authentication.

Nedzo API

Jentic publishes the only available OpenAPI specification for Nedzo API, keeping it validated and agent-ready. The Nedzo API is the programmatic surface of the Nedzo AI voice and communications platform, exposing 345 endpoints across workspaces, AI voice agents, contacts, contact lists, calls, templates, embeddable widgets, branding, and a GoHighLevel workflow integration. It supports a bearer API key for tenant access, an internal X-Service-Key for service-to-service calls, and a Supabase JWT scheme for dashboard users. The base URL is https://api.nedzo.ai and the API is structured around a /v1 namespace with public widget endpoints under /public.

Wallester

Wallester Card API Rate limits Wallester has no rate limits and allows sending an unlimited number of requests to API, but we reserve the right to impose such limits if necessary. RSA keys Encrypted card data exchange schema: ![Encrypted card data exchange schema](img/encrypted-card-data-exchange-schema.png) Public key needed in the request might be programmed to be generated and encrypted on each. The API exposes 248 endpoints.

Discord HTTP API (Preview)

The Discord HTTP API powers bots, integrations, and applications across Discord servers (guilds), channels, voice connections, and user accounts. The v10 surface covers 217 endpoints spanning guilds, channels, messages, threads, members, roles, voice regions, OAuth2, application commands, webhooks, stage instances, and partner SDK provisional accounts. It is the primary backbone for community automation, moderation tooling, and game integrations.

ClickSend REST API v3

Jentic publishes the only available OpenAPI specification for ClickSend REST API v3, keeping it validated and agent-ready. ClickSend is a multi-channel business messaging platform covering SMS, MMS, voice, fax, email, and postal mail (letters and postcards). The 205-endpoint v3 surface exposes contact list management, send and history endpoints for each channel, automation rules for inbound and receipt handling, account recharge and pricing, geolocation lookups, and detailed delivery reporting. Authentication uses HTTP Basic with the username and an API key obtained from the ClickSend dashboard.

Zoom Meetings

The Zoom Meeting API lets developers create, manage, and automate Zoom Meetings and Webinars programmatically. It covers the full meeting lifecycle - scheduling meetings and webinars, managing registrants and panelists, handling cloud recordings and archive files, controlling live in-meeting status, and pulling polls, surveys, and recording analytics. Built on Zoom's v2 platform, it supports both OAuth 2.0 and API-key authorization for marketplace apps. The API exposes 186 operations across 129 paths.

Trakt Tv Trakt API

At Trakt, we collect lots of interesting information about what tv shows and movies everyone is watching. Part of the fun with such data is making it available for anyone to mash up and use on their own site or app. The Trakt API was made just for this purpose. It is very easy to use, you basically call a URL and get some JSON back. More complex API calls (such as adding a movie or show to your co. The API exposes 183 endpoints secured with oauth2 authentication.

Trakt Tv Trakt API

At Trakt, we collect lots of interesting information about what tv shows and movies everyone is watching. Part of the fun with such data is making it available for anyone to mash up and use on their own site or app. The Trakt API was made just for this purpose. It is very easy to use, you basically call a URL and get some JSON back. More complex API calls (such as adding a movie or show to your co. The API exposes 183 endpoints secured with oauth2 authentication.

runZero API

runZero API. API use is rate limited, you can make as many calls per day as you have licensed assets. The API exposes 181 endpoints secured with bearer, oauth2 authentication.

Amazonaws Amazon Connect

Jentic publishes the only available OpenAPI specification for Amazon Connect, keeping it validated and agent-ready. Amazon Connect is a cloud contact center service that handles voice, chat, tasks, and email interactions, contact routing, agent management, and real-time and historical analytics. The API surface covers instance configuration, contact flows, routing profiles, queues, hours of operations, agent statuses, contact controls (transfer, hold, monitor), Lex and Lambda integrations, predictive and outbound dialing, and storage for recordings and transcripts. It is the programmatic surface behind a complete enterprise contact center.

Getstream Stream API

The Stream API powers in-app chat, channels, messages, reactions, threads, moderation, and activity feeds for consumer and SaaS products. It exposes 171 endpoints covering channel CRUD, message send and update, member roles, push notifications, blocklists, campaigns, and AI-assisted moderation. Stream issues short-lived JWT tokens per user so each client only sees the channels they belong to, and supports a global edge network for low-latency delivery worldwide.

Zulip REST API

Powerful open source group chat. The API exposes 151 endpoints secured with basic authentication.

Amazonaws Amazon Simple Email Service

Jentic publishes the only available OpenAPI specification for Amazon Simple Email Service, keeping it validated and agent-ready. Amazon SES is AWS's high-throughput email sending and receiving service for transactional and marketing email. The API covers identity verification, configuration sets, custom verification email templates, dedicated IP pools, receipt rules, sending statistics, and DKIM and bounce handling. It is built for engineering teams that need to send high-volume email from their own domains with deliverability instrumentation rather than depend on third-party email gateways.

ReviewStudio API

This document describes the ReviewStudio API and its usage. The headers for all the requests are the following: <pre> 'X-REVIEWSTUDIO-EMAIL' = Email of the admin. 'X-REVIEWSTUDIO-TOKEN' = API Key. </pre>. The API exposes 128 endpoints.

CallFire API

CallFire is a voice and SMS communications platform that lets businesses run outbound dialer campaigns, send text broadcasts, manage phone number inventory, and process inbound responses. The V2 API exposes 123 operations across 90 paths grouped by calls, campaigns, contacts, keywords, media, numbers, orders, reports, texts, tickets, and webhooks. It supports broadcast lifecycle management (create, start, stop, archive), recipient batches, call recordings, text-to-speech sound generation, keyword opt-in handling, and account reporting. Authentication is HTTP Basic, which keeps integration simple for server-to-server callers.

Circuitsandbox Circuit REST API Version 2

Circuit is a team collaboration platform from Unify offering persistent group conversations, direct messages, voice and video calls, screen sharing, and shared spaces. The Circuit REST API v2 exposes 123 endpoints over https://circuitsandbox.net/rest/v2 covering conversations, messages, users, presence, calls, call recording, and spaces. Authentication is OAuth 2.0 implicit flow with fine-grained scopes such as READ_CONVERSATIONS, WRITE_CONVERSATIONS, CALLS, CALL_RECORDING, USER_MANAGEMENT, and MANAGE_PRESENCE so an integration can request only the permissions it actually needs.

Callfireapidocumenta CallFire API Documentation

This is a SwaggerHub-hosted mirror of the CallFire V2 API documentation, covering 107 operations across 73 paths. CallFire is a voice and SMS communications platform that supports text broadcasts, voice broadcasts, IVR campaigns, text auto-reply, keyword leasing, number leasing, contacts and lists, do-not-call (DNC) management, orders, subscriptions, and webhooks. Authentication is HTTP Basic with the API username and password issued in the CallFire dashboard. This spec is sourced from a third-party SwaggerHub maintainer rather than CallFire's own developer portal, so resource coverage is wider in places but version-tracking lags the vendor-official spec.

CallFire API Documentation

CallFire API Documentation provides programmatic access to communications functionality. The API exposes 107 endpoints secured with basic authentication.

Lula GAIL (Lula API)

Jentic publishes the only available OpenAPI specification for GAIL (Lula API), keeping it validated and agent-ready. GAIL (Lula API) - also called Galactus External - is the full Lula AI calling platform surface, with 103 endpoints covering calls, campaigns, contacts, contact lists, conversations, sequences, scripts, sessions, SMS, audio files, redialing rules, do-not-call lists, data extraction, organisations, use cases, webhooks, and a Zapier integration namespace. Authentication is by X-API-Key header generated in the Gail Portal under General > Integrations > API Keys.

Snyk API

The Snyk API is available to customers on [Business and Enterprise plans](https://snyk.io/plans) and allows you to programatically integrate with Snyk. REST API We are in the process of building a new, improved API (`https://api.snyk.io/rest`) built using the OpenAPI and JSON API standards. We welcome you to try it out as we shape and release endpoints until it, ultimately, becomes a full replacem. The API exposes 103 endpoints.

Twilio - Conversations

This is the public Twilio REST API. The API exposes 103 endpoints secured with basic authentication.

Novu API

Jentic publishes the only available OpenAPI specification for Novu API, keeping it validated and agent-ready. Orchestrate multi-channel notifications across email, SMS, push, in-app, and chat from a unified API with 102 endpoints. Define notification workflows with step-based logic, manage subscriber preferences, and route messages through configurable provider integrations. Supports topic-based fan-out, bulk subscriber operations, and per-subscriber channel credential management.

Discourse API Documentation

Discourse is the open-source forum software behind tens of thousands of communities, support sites, and product hubs. The hosted discourse.org API exposes 93 operations covering topics, posts, categories, users, groups, badges, tags, search, private messages, the discourse-post-event plugin, and admin features such as backups and site settings. It is the same surface used internally by the Discourse mobile app and core integrations.

SendBird Chat Platform API

The SendBird Chat Platform API creates chat users and their session tokens, opens group and open channels, and sends, edits and lists the messages inside them. It also registers bots that post into channels, schedules announcements, appoints channel operators, freezes channels and blocks users, stores channel and user metadata, and reports daily and monthly active user counts. Every call carries an `Api-Token` header and is addressed to the host belonging to one SendBird application.

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