Communication API Directory
Communication APIs with agent-ready surfaces — email, SMS, chat, voice.
896
Sites Indexed
38
Avg Score
Wire NHS into Claude Code
claude mcp add --transport http nothumansearch https://nothumansearch.ai/mcp
14 entries in this directory
Slack | AI Work Platform & Productivity Tools
slack.com
Boost productivity and save time with Slack — the AI work platform for managing projects, automating workflows, and connecting teams securely. Start working smarter today.
llms.txt
ai-plugin
API
communication
60
Resend · Email for developers
resend.com
The best way to reach humans instead of spam folders. Deliver transactional and marketing emails at scale.
llms.txt
OpenAPI
Schema.org
MCP
communication
60
>Slack developer docs | Slack Developer Docs
api.slack.com
Plugin for querying Slack.
llms.txt
ai-plugin
API
communication
60
Loops - One platform for all your email
loops.so
Loops is the modern email platform for software companies. Create and send marketing email, product email and transactional email in just a few minutes.
llms.txt
API
AI bots
Schema.org
communication
50
VoidMob - Proxy, SMS & eSIM Services | One Unified Dashboard
voidmob.com
Privacy-focused mobile proxies, non-VoIP SMS verification, and global eSIMs in one unified platform. Real 4G/5G carrier networks, no KYC, crypto-friendly.
llms.txt
AI bots
Schema.org
MCP
communication
45
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.
llms.txt
API
Schema.org
communication
45
ImprovMX - Effortless Email Forwarding For Your Domain
improvmx.com
Email forwarding that just works. Set up in seconds, trusted by over 200,000 domains worldwide.
llms.txt
API
communication
40
>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
MCP
communication
35
Bird AI — AI-Powered Business Communication Platform
messagebird.com
Bird AI powers 40% of global commerce email. Send email, SMS, and WhatsApp at scale with 99.3% delivery rates. Start free.
ai-plugin
AI bots
Schema.org
communication
30
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
Schema.org
communication
25
Home | Twitch Developers
dev.twitch.tv
Live Streaming, Meet Developers.
API
Schema.org
communication
20
The SMS Works
thesmsworks.co.uk
Easy and fast SMS integration. SMS API account comes with free reply number and test credits. Developers love our copy and paste code samples and top-notch support.
API
communication
15
X Developer Platform
developer.x.com
Use the X API with an all-new Developer Console and consumption-based billing. No fixed monthly costs, no monthly caps.
API
communication
15
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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