Communications & messaging
687 APIs for SMS, voice, video calls, chat, notifications, or social communication.
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322 APIs added in the last 30 days.
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687- CO18 operations148 revisionsConversations Inbox & Messages@hubspot/conversations-conversations
Inboxes: read and update threads, messages, assignees and channel accounts across chat channels
- AP68 operations4 revisionsapi.onesignal.com@onesignal/api-onesignal-com
Messaging: send push, email and SMS, manage templates, segments, users and subscriptions
- IN107 operations8 revisionsInvite Tracker API@invite-tracker/invite-tracker-api
Discord bot dashboard: manage guild modules, audit logs, giveaways, analytics, and ticket transcripts
- LI76 operations2 revisionsLiveSwitch Cloud API@liveswitch/liveswitch-cloud-api
Real-time video: manage applications, channels, recordings, webhooks, API keys and billing usage
- TR6 operations219 revisionsTransactional Single Send@hubspot/marketing-transactional-single-send
Email: send single transactional emails and manage SMTP API tokens and passwords
- TE1,556 operations538 revisionsTelnyx API@team-telnyx/telnyx-api-2
Telephony: place calls, send SMS and MMS, manage phone numbers, SIP trunks and conferences
- TR321 operations69 revisionsTrytrata API@trytrata/trytrata-api
Investor platform: calls, recordings, transcripts, earnings coverage, LiveKit voice rooms and notifications
- CO13 operations207 revisionsConversations Custom Channels@hubspot/conversations-custom-channels
Custom channels: create and manage messaging channels, their accounts, and published messages
- TE156 operations4 revisionsTextmagic API@textmagic/textmagic-api
SMS messaging: send and schedule texts, manage contacts, lists, chats and replies
- NE26 operations9 revisionsNeuphonic API@neuphonic/neuphonic-api
Text-to-speech: clone voices, create agents, validate IPA, and generate streamed speech
- AG144 operations4 revisionsAgentboxd API@agentboxd/agentboxd-api
Email inboxes and messages for AI agents: create inboxes, send and search mail, manage drafts and webhooks
- CO79 operations71 revisionsCompatibility API@signalwire/compatibility-api
Telephony: place calls, send SMS/MMS and faxes, manage phone numbers, queues and recordings
- VO44 operations58 revisionsVoice Logica API@voicelogica/voice-logica-api
Voice AI: place outbound AI calls, run campaigns, query calls, SMS and SIP trunks
- TW116 operations7 revisionsTweetAPI v2 API Reference@tweetapi/tweetapi-v2-api-reference
Social media: read tweets, profiles and trends, search, and post, like, DM or manage lists
- HA82 operations16 revisionsHail@hail/hail
AI agents: place calls, send email and SMS, rent phone numbers, manage contacts
- CO15 operations18 revisionsConvai API@convai/convai-api
Group chat sessions: connect, disconnect, upload and describe images, plus character features and health checks
- SP8 operations23 revisionsSpeaking Meeting Bot API@meeting-baas/meeting-baas-api
Video meetings: deploy voice AI bots that join calls, speak, and handle escalations
- CH31 operations6 revisionsChatway Developer Docs@chatway/chatway-developer-docs
Live chat: REST API and webhooks to manage contacts, agents, conversations, messages and widgets
- SK38 operations12 revisionsSkipCalls Public API@skipcalls/skipcalls-public-api
Voice agents: configure agents, schedule and inspect calls, manage inbound calls, contacts and appointments
- FA31 operations8 revisionsFax API@sinch/fax-api
Fax: send and receive faxes, manage services, cover pages, email domains and templates
- TR23 operations16 revisionsTransmit Message API@kudosity/transmit-message-api
Messaging: send SMS, MMS, RCS and WhatsApp messages, register senders and manage webhooks
- SH15 operations2 revisionsShipyard API@goshipyard/shipyard-api
Listings, upvotes and reactions for indie apps, plus a board of threads to reply to
- DI250 operations275 revisionsDiscord HTTP API (Preview)@discord/discord-http-api-preview
Chat, servers, users and bots: manage channels, guilds, webhooks, lobbies and stickers via the Discord v10 API
- PR23 operations7 revisionsPremier Letters API@premierletters/premier-letters-api
Mail: send handwritten letters, cards and postcards via USPS, with previews and tracking
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