Agent-ready email and messaging
129 verified email and messaging sites, 69 of them transactable — every one probed live, with the date it was checked. Figures generated 27 Sep 2026 10:47 UTC
Checks passed across the 140 probed hosts: Markdown negotiation 122 · Markdown twin at a predictable URL 91 · llms.txt 128 · API catalog 36 · MCP server card answers 94.
✓Central de Ajuda help.wizebot.com.br
WizeBot provides official WhatsApp Business API automation with features like chatbots, mass messaging, integrations, and CRM management.
BR✓Linq linqapp.com
Linq provides APIs for iMessage, RCS, SMS, and voice messaging with global delivery and developer tools.
✓mailfixture mailfixture.com
mailfixture provides an API to create test inboxes that receive and parse OTP emails for automated test suites.
✓myconf.it myconf.it
Free IT tools for network engineers and sysadmins including public IP lookup, subnet calculator, and email deliverability checker with JSON API.
✓Email Testing For Developers smtp.dev
SMTP.dev provides email testing for developers with SMTP in, IMAP/API out, allowing inspection of headers, MIME, and raw source without running servers.
✓mailX themailx.com
mailX provides free DNS lookup, email deliverability tests, and network tools including SPF, DKIM, DMARC, and blacklist checking.
✓toSend tosend.com
toSend is a transactional email delivery service offering a flat rate per email with no tiers or monthly commitments, including API and WordPress integration.
✓AI Inbx Docs docs.aiinbx.com
Documentation for AI Inbx, an email infrastructure API for sending, receiving, and managing conversational AI email workflows.
✓Amisend docs.amisend.com
Amisend provides email API documentation for entrepreneurs, including quickstart guides for Node.js.
✓Conversales ai docs.conversales.in
Conversales AI provides API documentation for integrating WhatsApp Business messaging including sending messages, managing templates, and tracking status.
✓CrunchzApp docs.crunchz.app
CrunchzApp API enables businesses to automate WhatsApp messaging using their own numbers with full developer control and smart automation.
✓Mailblock Documentation docs.mailblock.de
Documentation for Mailblock, a developer-first email delivery platform with SDKs and domain setup guides.
✓Proofy docs.proofy.io
Proofy provides API documentation for verifying single and bulk emails with endpoints for single, batch, and file verification.
✓Starter Kit docs.videosupport.io
Documentation for VideoSupport API enabling video messaging integration with video requests, recording interface, storage, custom data, and webhooks.
✓Wapi.js javascript.wapikit.com
Wapi.js is a node.js SDK for developing WhatsApp Business platform applications with ease and speed.
✓Kapso kapso.com
Kapso provides a WhatsApp API platform for developers to send messages, receive webhooks, and integrate WhatsApp workflows.
✓MailerSend www.mailersend.com
MailerSend provides an email sending service with API and SMTP integration, supporting transactional emails and multiple domains.
✓SendLayer API Documentation developers.sendlayer.com
Documentation for SendLayer API showing how to set up and send transactional emails using SDKs and API calls.
✓MailChannels docs.mailchannels.com
Documentation for MailChannels Email API, inbound and outbound filtering, setup, authentication, and troubleshooting.
✓QuickBlox docs.quickblox.com
QuickBlox documentation provides guides and SDKs to integrate real-time messaging and video calls into web and mobile apps.
✓OneSignal documentation.onesignal.com
OneSignal provides documentation for setting up and using messaging APIs including push notifications, email, SMS, and analytics.
✓Necode necode.io
Necode provides a system that qualifies, nurtures, and schedules messages from WhatsApp, Instagram, and Google listings automatically.
✓ValidKit validkit.com
ValidKit provides a real-time email validation API with under 200ms response times for signup forms, including CLI and SDK tools.
✓Best Newsletter Tools www.bestnewslettertools.com
A curated directory listing top newsletter tools, email marketing platforms, and services for creators and publishers.
✓SBMG sbmg.app
Documentation changelog detailing updates and additions to the SBMG messaging gateway service including API, web app, and Android improvements.
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