Communications & messaging
782 APIs for SMS, voice, video calls, chat, notifications, or social communication.
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783- CO13 operations365 revisionsConversations Custom Channels@hubspot/conversations-custom-channels
Custom channels: create and manage messaging channels, their accounts, and published messages
- PR336 operations62 revisionsPrimitive API@primitive/primitive-api
Email infrastructure: send and receive email, manage domains, webhooks, filters and threads
- PH333 operations641 revisionsPhoenix API by Phone.com@phone/phoenix-api-by-phone-com
Telephony: manage calls, numbers, SMS, voicemail, faxes, devices and call logs
- DI1,251 operations210 revisionsDialogBrain v2 API Gateway@dialogbrain/dialogbrain-v2-api-gateway
Inbox, channels, AI agents, workspace integrations and files for a multi-channel messaging platform
- XQ223 operations527 revisionsXquik API@xquik-dev/xquik-api
Read and write X (Twitter) data: search posts, look up users, manage monitors and webhooks
- TR6 operations243 revisionsTransactional Single Send@hubspot/marketing-transactional-single-send
Email: send single transactional emails and manage SMTP API tokens and passwords
- TE1,552 operations995 revisionsTelnyx API@team-telnyx/telnyx-api-2
Telephony: place calls, send SMS and MMS, manage phone numbers, SIP trunks and conferences
- SA385 operations37 revisionsSamva API@samva/samva-api
Email and WhatsApp messaging: send messages, manage contacts, conversations, campaigns and journeys
- SH238 operations41 revisionsshipmail API@shipmail/shipmail-api
Email, calendar and booking: send messages, manage mailboxes, domains, newsletters and scheduling pages
- SP188 operations6 revisionsSpeak AI API@speakai/speak-ai-api
Transcription and insights for audio and video, plus voice agents, folders, labels and exports
- LE39 operations2 revisionsleexi-public-api@leexi/leexi-public-api
Meetings and calls: manage calls, call notes, meeting events, teams, users and client companies
- 3G42 operations12 revisions3GPP Scout API@3gppscout/3gpp-scout-api
Telecom standards: search 3GPP specs, TDocs, meetings, decisions, RFCs and proposals
- X260 operations45 revisionsX API v2@x/x-api-v2
Posts, DMs, lists, communities and live broadcasts: read and publish X content, manage bots and notes
- PO15 operations2 revisionsPostfleet API@postfleet/postfleet-api
Email API: send and screen messages, manage mailboxes, drafts, and custom sending domains
- FL444 operations68 revisionsFluxer API@fluxer/fluxer-api
Chat and VoIP: manage guilds, channels, messages, invites, webhooks, search and user themes
- CL328 operations25 revisionsClawdChat@clawdchat/clawdchat
AI agent social network: register agents, publish posts, comment, join circles and search
- BI534 operations129 revisionsBird API@messagebird/bird-api
Email, SMS, WhatsApp and voice messaging: send messages, manage contacts, templates and analytics
- AU23 operations5 revisionsautoMessage REST API@automessage/automessage-rest-api
Messaging: send and read iMessages, manage contacts, drafts and webhooks
- HA85 operations19 revisionsHail@hail/hail
Voice calls, phone numbers, SMS, email and webhooks for AI agents, with contacts and uploads
- GO55 operations12 revisionsGoogle Chat API@google/chat
Chat apps: manage spaces, members, messages, custom emojis, media uploads and user availability
- SP173 operations244 revisionsspreed@nextcloud/spreed
Chat, calls, rooms, polls and recordings for WebRTC conferencing, with bans, bots and breakout rooms
- SP7 operations91 revisionsspreed-backend-sipbridge@nextcloud/spreed-backend-sipbridge
Spreed conferencing: look up rooms, verify SIP dial-in and dial-out numbers, create guests
- SP9 operations99 revisionsspreed-federation@nextcloud/spreed-federation
Chat and video rooms: list, accept or decline federation invites, join or leave rooms, fetch user avatars
- SE923 operations35 revisionsSendSeven@sendseven/sendseven
Messaging: send WhatsApp, SMS and Telegram messages, manage conversations, campaigns and contacts
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