Product

Jentic OSThe workplace. An in-house AI platform for every employee Jentic OneSafe access. Agents reach your systems without holding keys Jentic AIRThe foundation. Gets your existing platforms ready for AI

Developers

GET STARTED

API DirectoryBrowse 10,000+ APIs Ready For AI Agent Integration DocumentationGuides and API reference

TOOLS

API ScoringCheck your AI Readiness using our scorecard Arazzo UIVisualize Arazzo Workflows As Interactive Documentation Arazzo EditorBuild And Edit Multi-Step API Workflows Visually

COMMUNITY

GitHubOpen source projects and examples Open StandardsBuilt on open specs. Never locked in.

Company

About UsOur mission and team CareersJoin our team ContactGet in touch

Jentic OS Jentic One Jentic AIR

API Directory Documentation API Scoring Arazzo UI Arazzo Editor GitHub Open Standards

About Us Careers Contact

Sign up for exclusive Jentic updates

Website

Products

Jentic OS
Jentic One
Jentic AIR

For Developers

API Directory
Documentation
GitHub

Company

About Jentic
Careers
Contact Us
Trust Centre

Information Security Management System

Certified to ISO/IEC 27001:2022 by Prescient Security

Terms & Conditions•Privacy Policy•

© 2026 Jentic Technology Ltd. All rights reserved.

Switch to light modeSwitch to dark mode

APIs/Communications

Communications APIs

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

Browse Communications APIs

Press Enter to search.

Filters

Developer Tools

Communications

Data Enrichment

E Commerce

Productivity

CRM

Payments

Marketing

Finance

Media

Identity Auth

AI/ML

Cloud Infrastructure

Analytics

Security

HR recruiting

Maps Geolocation

Storage

IOT

Healthcare

Education

Social Media

A-Z

Most Popular

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.

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.

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.

Core Telegram Telegram Bot API

Jentic publishes the only available OpenAPI specification for Telegram Bot API, keeping it validated and agent-ready. The Telegram Bot API exposes 24 method-style endpoints under the path /{methodName} for sending messages, photos, documents and other media to chats, plus webhook setup, getMe identity checks, message forwarding and copying, and update polling for long-poll bot architectures. Authentication is via the bot token embedded in the path (https://api.telegram.org/bot{token}/METHOD), and methods accept JSON or form-encoded bodies. The API supports both polling (getUpdates) and push (setWebhook) flows for receiving incoming messages.

Sinch Conversation API

The Sinch Conversation API enables sending and receiving messages globally across SMS, RCS, WhatsApp, Viber Business, Facebook Messenger, and other channels through a unified interface. The API exposes 22 endpoints secured with basic, oauth2 authentication.

Plivo SMS API

Jentic publishes the only available OpenAPI specification for Plivo SMS API, keeping it validated and agent-ready. Send and receive SMS, MMS, and WhatsApp messages to 200+ countries through a straightforward REST API with 4 endpoints. Retrieve message delivery status, list sent messages with filtering, and access media attachments on MMS messages. Supports both single-recipient and bulk messaging with per-message delivery receipts.

Nylas API

The Nylas API v3 provides a unified communications surface across email, calendar, and contacts that abstracts away the differences between Google, Microsoft, and IMAP backends. The 55-endpoint API covers OAuth-style hosted authentication, grant management, connector configuration, and full read/write operations on messages, threads, drafts, events, calendars, and contacts. It is well suited to building scheduling tools, inbox-aware AI assistants, and CRM enrichment workflows that need to read and write across whichever email and calendar provider the end user happens to use.

MessageBird SMS API

Jentic publishes the only available OpenAPI specification for MessageBird SMS API, keeping it validated and agent-ready. The MessageBird SMS API sends and manages SMS messages through MessageBird's global mobile network, returning delivery metadata for each send. Agents can dispatch a message, list previously sent messages, look up a single message by ID, and delete a stored message record from the same compact surface. Authentication uses MessageBird's `AccessKey` scheme and the API is suitable for transactional SMS, OTP delivery, and outbound notifications.

Postmarkapp Postmark API

The Postmark API handles transactional email delivery with 43 endpoints covering sending (single, batch, and templated), bounce management, inbound message processing, outbound message search, delivery statistics, and template management. It tracks opens, clicks, and spam complaints with per-message granularity and supports inbound email processing with bypass and retry controls. Authentication uses a per-server token in the X-Postmark-Server-Token header.

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.

MailSlurp API

The MailSlurp API creates email inboxes and phone numbers on demand and sends and receives email and SMS. It creates inboxes, sends emails, waits for and reads incoming messages and their attachments, and manages templates, contacts, webhooks, forwarders, and rulesets. Phone numbers can be allocated to receive SMS. Responses are JSON, so an agent can spin up a test inbox, send a message, and read the reply without running its own mail server.

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.

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.

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.

BOOK A DEMO

Start Connecting APIs to Your AI Agents

Browse thousands of APIs and connect them all to your agent with Jentic One. One layer, one credential — every API your agent needs.