Communications
Messaging, customer support and meeting applications. Reading information and sending messages have different effects and permissions.
Services are ordered by documented operations, attributed reports and current documentation. 115 services are classified here. Each card shows the interfaces a service offers; open it for access requirements and sources.
Categories · Tasks · Interfaces · How listings are checked
ZeroBounce
ZeroBounce provides an email validation API that checks email addresses in real time.
Communications · Developer tools
API · Documentation checked: 2026-10-13API · Access documentation verifiedMailtrap
Mailtrap provides an Email API for sending transactional and bulk application emails from a verified sending domain.
Communications · Developer tools
API · Access documentation verifiedOmnisend
Omnisend provides an email and SMS marketing platform for ecommerce brands.
marketing · Communications
API · Access documentation verifiedCaptain Verify
Email verification service with a v2 API for checking email validity and returning a JSON result.
Communications · data validation · Developer tools
API · Access documentation verifiedSendLayer
Send a transactional email through SendLayer's authenticated email API after authorizing a sending domain.
Communications
API · Access documentation verifiedMailerSend
MailerSend Email API for sending an asynchronous email and receiving its message identifier.
Communications · api
API · Access documentation verifiedCallHub
CallHub provides campaign outreach tools and an API to retrieve account user information and related objects.
campaign-management · Communications · outreach
API · Documentation checked: 2026-10-09Tomba
Tomba provides email finder, verifier, and enrichment APIs for company and professional contact data.
sales · Communications · Public data
API · Documentation checked: 2026-10-09SMSGlobal
Business messaging provider with an HTTP API for sending one-way SMS.
Communications · Communications · API
API · Documentation checked: 2026-10-09Elastic Email
Email delivery platform with APIs for managing campaigns and sending email.
Communications · marketing · Developer tools
API · Documentation checked: 2026-10-09Pushbullet
Push notification and device messaging service with an API for retrieving the authenticated user profile and sending or receiving pushes.
Communications · notifications
API · Documentation checked: 2026-10-09MailProbe
MailProbe is an email verification service with REST API and MCP access.
Communications · verification · MCP
MCP · Documentation checked: 2026-10-10Missive
Missive is a collaborative email and team inbox service; its REST API can retrieve existing messages with full bodies and attachments.
Communications · Productivity and collaboration · api
API · Documentation checked: 2026-10-09Smstools
Read the sender IDs configured for an authenticated Smstools account through its SMS gateway API.
sms · Communications · Communications · api
API · Documentation checked: 2026-10-11Mails
Mails provides an email validation API for checking single addresses and validating email lists.
Communications · Developer tools · data-validation
API · Documentation checked: 2026-10-10ntfy
ntfy is an HTTP-based pub-sub notification service that lets applications publish messages to topics for delivery to subscribed phones, desktops, or other clients.
notifications · Communications · Developer tools
API · Documentation checked: 2026-10-10TextMagic
A business messaging platform with an SMS REST API for sending text messages to phone numbers and contact lists.
Communications · sms · api
API · Documentation checked: 2026-10-10SMS.to
SMS.to provides an omnichannel messaging platform and an API for checking the balance of an SMS.to account.
Communications · Communications · API
API · Documentation checked: 2026-10-11AgentMail
AgentMail is an email API for AI agents. Agents can create inboxes, send email, and receive mail in their inboxes.
Communications · communication
API · Documentation checked: 2026-10-13MailRambo
Email verification API for checking whether an address is deliverable, with fast, batch, and account endpoints.
Communications · Developer tools · API
API · Documentation checked: 2026-10-09SendPulse
Marketing automation platform with APIs for account and communications services.
Marketing · Communications · API
API · Documentation checked: 2026-10-09SMTPfast
SMTPfast provides a transactional email API with REST and SMTP interfaces for developers.
Communications · Communications · Developer tools
API · Documentation checked: 2026-10-12seven.io
seven.io provides an HTTP API for messaging services and account information, including the current account balance.
Communications · Communications · API
API · Documentation checked: 2026-10-10Blink
Frontline workforce communication platform with APIs for creating chats and connecting workplace applications.
communication · workforce · Communications
API · Documentation checked: 2026-10-10