Communication API Directory
Communication APIs with agent-ready surfaces — email, SMS, chat, voice.
4314
Sites Indexed
37
Avg Score
123 entries in this directory
Free AI Design Tool: Logos, T-Shirts, Social Media - Playground
playground.com
Create custom designs and graphics with Playground
llms.txt
API
AI bots
communication
45
+25 llms.txt
+15 structured API
missing +20 ai-plugin
Mailtrap: Modern Email Delivery for dev and product teams
mailtrap.io
Modern Email Delivery Platform for developer & product teams. Fast delivery. High inboxing rates. 24/7 expert support. Email API/SMTP for reliable email sending
llms.txt
API
Schema.org
communication
45
+25 llms.txt
+15 structured API
missing +20 ai-plugin
Create Email Marketing Your Audience Will Love - MailerLite
mailerlite.com
Digital marketing tools to grow your audience faster and drive revenue smarter. Backed by 24/7 award-winning support. Check it out now!
llms.txt
API
Schema.org
communication
45
+25 llms.txt
+15 structured API
missing +20 ai-plugin
Portable, private memory for your AI work | Mnemolog
mnemolog.com
Mnemolog turns your best ChatGPT, Claude, Gemini, Grok, Cursor, and agent conversations into private, searchable memory you can cite, export, and continue anywhere. Private by default.
llms.txt
API
Schema.org
communication
45
+25 llms.txt
+15 structured API
missing +20 ai-plugin
VDO.Ninja
vdo.ninja
Bring live video from your smartphone, computer, or friends directly into your Studio. 100% free.
llms.txt
API
Schema.org
communication
45
+25 llms.txt
+15 structured API
missing +20 ai-plugin
E-filing Expert for IRS Form 1099, W-2, W-9, 1095, 941 and others
taxbandits.com
E-file 1099, W-2, W-9, 1095, 941 and other IRS Forms with the filing expert. Solution for TaxPros, Businesses, Enterprises & Developers. We distribute employee/recipient copies by postal mail and online access portal.
llms.txt
API
Schema.org
communication
45
+25 llms.txt
+15 structured API
missing +20 ai-plugin
Modern Personal Matching - personly
personly.com
personly is a platform for creating anonymous personals which match other personals instantly, making it super easy to meet people for any activity.
llms.txt
API
Schema.org
communication
45
+25 llms.txt
+15 structured API
missing +20 ai-plugin
SendGrid Email API and Email Marketing Campaigns | Twilio
sendgrid.com
SendGrid's trusted email API and marketing campaigns platform is now available through Twilio.com.
llms.txt
API
communication
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
Secure, customizable & reliable WebRTC Video Calls| Whereby
whereby.com
Host quick instant meetings or embed video calls into your platform with Whereby’s video conferencing API and SDK.
llms.txt
API
communication
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
M
Communications infrastructure your AI agents operate — Bird
messagebird.com
Send and receive across email, SMS, WhatsApp, and voice — one API, one contract — on the network that already carries 40% of the world's commercial messages.
ai-plugin
API
Schema.org
communication
40
+20 ai-plugin
+15 structured API
missing +25 llms.txt
Customer Engagement Platform for Email, Push… - OneSignal
onesignal.com
The world's leader for mobile push notifications, web push, SMS, email and in-app messaging. Trusted by 2 million+ businesses to send 12 billion+ messages per…
llms.txt
API
communication
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
Social technologies | Meta for Developers
developers.facebook.com
Use Meta's developer tools and resources to build solutions that help people connect and grow businesses.
llms.txt
API
communication
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
D
Welcome to Whereby Embedded | Whereby
docs.whereby.com
Whereby Embedded is the easiest way to add video calls to your web page or mobile app. Get up and running in minutes, not months, so you're free to focus on what you do best — your business.
llms.txt
API
communication
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
D
What is VDO.Ninja? | Ninja Docs
docs.vdo.ninja
"Vee-Dee-Oh" .. oh, video!
llms.txt
API
communication
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
Ship 10x smarter with perfect context | SpecStory
specstory.com
Never lose an AI conversation again. Automatically capture every chat from Cursor, Copilot, Claude Code & Codex. Save locally, access everywhere. Ship 10x smarter with perfect context.
llms.txt
API
communication
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
Pageradar : The best SEO alert tracker tool - Catch issues before Google
pageradar.io
Get instant SEO alerts for Core Web Vitals drops, HTML changes, broken pages & ranking losses. The best SEO alert tracker catches issues before Google penalties.
llms.txt
API
communication
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
BulkSMS.com | SMS Gateway to 213 Countries | BulkSMS.com
bulksms.com
Get your message across. One account, so many ways to send.
llms.txt
API
communication
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
CBDtech : Fleurs, Huiles, Gélules CBD | Achat en Ligne
cbdtech.fr
L'Expert du CBD légal en France. Fleurs, huiles, gélules, patchs... Retrouvez une meilleure qualité de vie grâce au cannabidiol.
llms.txt
Schema.org
MCP
communication
40
+25 llms.txt
+10 MCP
missing +20 ai-plugin
T
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
Reliable Email Verification API - Mailboxlayer API Service
mailboxlayer.com
Simple and powerful email verification JSON API using SMTP, typo checks, syntax validation, and free and disposable provider filtering. Free for personal use.
llms.txt
API
communication
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
D
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
Mailsac : Disposable Email Testing Platform
mailsac.com
Test your application's email delivery with our disposable email services. Empower your QA and Software teams with integrations throughout the testing process.
OpenAPI
API
Schema.org
communication
40
+20 OpenAPI
+15 structured API
missing +25 llms.txt
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
S
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
Chat Expasy
chat.expasy.org
Assistant to navigate resources from the Swiss Institute of Bioinformatics (SIB).
OpenAPI
API
communication
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
R
Recordo - The AI Second Brain for ADHD
recordo.app
AI task manager for ADHD that works with ChatGPT & Claude. Capture ideas by voice, text, or photo. Never lose track again.
API
AI bots
Schema.org
communication
25
+15 structured API
+5 AI robots
missing +25 llms.txt
Discord - Group Chat That’s All Fun & Games
discord.com
Discord is great for playing games and chilling with friends, or even building a worldwide community. Customize your own space to talk, play, and hang out.
API
Schema.org
communication
20
+15 structured API
+5 Schema.org
missing +25 llms.txt
Quo (formerly OpenPhone) | Best Phone System for Startups & Small Businesses
openphone.com
Quo brings your calls, texts, and contacts together in one AI-powered shared space. Keep your team aligned, respond faster, and ensure every customer feels valued.
API
Schema.org
communication
20
+15 structured API
+5 Schema.org
missing +25 llms.txt
One platform to connect | Zoom
zoom.us
Modernize workflows with Zoom's trusted collaboration tools: including video meetings, Zoom Chat, VoIP phone, webinars, whiteboard, contact center, and events.
API
Schema.org
communication
20
+15 structured API
+5 Schema.org
missing +25 llms.txt
The AI Customer Support Platform for Every Business - Crisp
crisp.chat
Crisp is the ultimate all-in-one AI-powered multichannel messaging platform that helps businesses connect instantly with their customers or leads who are waiting for support. With its quickly evolving set of tools, Crisp is leading businesses through the AI-driven revolution by using conversations to unlock hypergrowth.
API
Schema.org
communication
20
+15 structured API
+5 Schema.org
missing +25 llms.txt
Wire NHS into your agent — MCP server
Add Not Human Search as an MCP tool. Your agent can call search_agents, get_site_details, get_stats, and submit_site at runtime.
Claude Code
claude mcp add --transport http nothumansearch https://nothumansearch.ai/mcp
Other clients: point any MCP-compatible tool at
https://nothumansearch.ai/mcp (streamable-http transport).Use NHS via REST
Prefer plain HTTP? Hit the search endpoint directly.
Search API
curl "https://nothumansearch.ai/api/v1/search?q=payment+API"
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