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Goodbits
Manage email newsletters and subscribers for roundup-style newsletters. Add and update subscribers, create content links in the content library, retrieve sent email details, and access email analytics including open rates, click counts, and engagement metrics. Retrieve newsletter information and subscriber counts by status.
Gong
Access and analyze sales call recordings, transcripts, and conversation intelligence data. Retrieve call details including participants, topics, trackers, scorecards, and full transcripts with speaker labels. Upload and manage call recordings from external systems. Retrieve user activity statistics such as talk ratios and interaction metrics. Manage CRM data by uploading accounts, contacts, deals, and leads. List and manage Engage outreach automation flows, assign or unassign prospects, and override flow content for campaigns. Browse and manage the call library and folders. Push digital interaction events like content shares and views. Create, validate, and delete meetings. Handle data privacy operations including GDPR-compliant erasure of user data. Retrieve audit logs, tracker configurations, workspace details, and permission profiles. Receive webhook notifications when calls match configured automation rules.
Habitica
Manage gamified tasks, habits, and productivity goals in Habitica's RPG-style task manager. Create, update, delete, and score tasks across four types: Habits, Dailies, To-Dos, and Rewards. Retrieve and update user profiles, character stats (HP, XP, Gold, Mana), class, equipment, and appearance. Manage inventory including pets, mounts, eggs, hatching potions, food, and quest scrolls. Cast class-specific skills and spells. Manage social groups (parties and guilds), send chat messages, and handle private messaging. Create, join, and manage challenges. Invite to, accept, start, and cancel quests. Create and organize tags for task filtering. Retrieve game content data for gear, quests, pets, and mounts. Configure webhooks for task activity, group chat, user activity, and quest events.
Handwrytten
Send physical handwritten notes and cards using robotic pens. Choose from handwriting styles and 100+ card/stationery designs, or create custom cards with uploaded images and logos. Manage an address book of recipients, create reusable message templates, include gift cards or physical inserts with orders, and schedule cards for future delivery. Support batch ordering via baskets for sending multiple cards at once. Track order status and retrieve proof images of completed letters.
Heartbeat
Manage an online community on Heartbeat. Create, retrieve, update, and deactivate members. Manage groups and group membership, including moving users between groups. Create threads and comments in channels with plain text or rich text (HTML) content. Create channels and events, with support for Zoom or built-in voice locations. Send direct messages to community members. Send invitation emails to new users. Configure webhooks to receive notifications for community activity such as new users, threads, events, group joins, course completions, event RSVPs, direct messages, and abandoned invitations.
Helpwise
Manage shared inboxes and customer conversations across email, SMS, WhatsApp, live chat, and social media channels. Send and list emails, create and manage mailboxes, track and assign conversations, add internal notes, manage contacts, upload attachments, organize with tags, and use email templates. Manage teams, users, and webhooks for real-time event notifications on conversation lifecycle, assignment, and message activity.
Heyy
Manage Heyy contacts, chats, WhatsApp messages, broadcasts, and automation workflows. Inspect your current workspace and retrieve detailed contacts and chats through API v3. Legacy API v2 tools require migration before Heyy's announced November 1, 2026 sunset.
Hiver
Manage shared email inboxes and customer support conversations within Gmail and Outlook. List and browse shared inboxes, retrieve and update conversations (status, assignee, tags), search users and tags per inbox, and track email activity.
Hunter
Find, verify, and enrich professional email addresses and company data. Search for all emails associated with a domain, find specific contacts by name or LinkedIn handle, and verify email deliverability. Enrich person and company profiles with detailed information including employment details, social profiles, technographics, industry classifications, and funding data. Discover companies using natural language queries or structured filters. Manage leads and lead lists, run email outreach sequences, and track sequence events like opens, clicks, and replies via webhooks. Retrieve company logos and check account credit usage.
Incidentio
Declare, read and edit incidents; ingest HTTP alert events; inspect on-call coverage and manage temporary overrides; maintain catalog entries; discover status pages and publish incident updates. Read incident configuration, users, follow-ups and automation workflows.
Instantly
Manage draft campaigns, leads and lists, sending-account settings, inbox messages, verification, tags, block lists and campaign analytics through the scoped V2 API. Identify the connected workspace and track asynchronous lead moves. Campaign activation/resumption and replies can send real emails; verification can spend credits.
Intelliprint
Send physical letters and postcards programmatically via a UK-based hybrid mail service. Create and manage print jobs with support for PDF, Word, HTML content, or dynamic templates. Configure postage services including UK First/Second Class, Signed For, Special Delivery, Tracked, and International options. Schedule mailings for future dates, track letter status through printing, dispatch, and delivery stages, and cancel jobs before production. Send bulk mail by splitting large documents or batching recipients in a single API call. Apply reusable backgrounds and letterheads, attach extra documents, and customize page positioning.
Invision
InVision was a digital product design platform that provided design collaboration, prototyping, and design system management tools. It was permanently shut down on December 31, 2024, and no API integration is currently possible. Prior to shutdown, its limited API capabilities included: retrieving design tokens (colors, typography, spacing) and icons from Design System Manager (DSM), and SCIM-based user provisioning for Enterprise accounts. InVision never offered a general-purpose API for managing prototypes, projects, or core platform resources. Its Freehand collaboration tool was acquired by Miro in 2023.
Iterable
Manage cross-channel marketing automation across email, push notifications, SMS, in-app messages, web push, and WhatsApp. Create, update, and delete user profiles, track custom and commerce events, and manage subscription preferences. Create and manage campaigns (blast or triggered) and message templates with Handlebars personalization. Organize users into lists for audience targeting. Send transactional messages to individual users via API-triggered campaigns with dynamic data fields. Create and manage catalogs of items for template personalization. Create, update, and delete reusable content snippets for embedding in templates. Export user data, event data, and campaign metrics as CSV. Manage messaging channels and message types. Receive real-time webhook notifications for email, push, SMS, in-app, web push, WhatsApp, subscription, journey, and embedded messaging events.
Kickbox
Verify email addresses for deliverability, detect disposable, role-based, and free email domains, and identify typos in email addresses. Supports single real-time email verification and batch verification of up to 1 million addresses. Returns deliverability status (deliverable, undeliverable, risky, unknown), a Sendex quality score, and suggested corrections for misspelled domains. Useful for cleaning email lists, reducing bounce rates, and validating user-submitted emails.
Klaviyo
Manage email, SMS, and push notification marketing campaigns for eCommerce. Create and update customer profiles, manage lists and segments, build automated messaging flows, track events, and query performance reports. Supports product catalog management for recommendations and back-in-stock alerts, coupon creation, email template design, form management, and audience segmentation based on behavioral and predictive data. Subscribe and unsubscribe profiles from marketing channels, request data privacy deletions, and configure webhooks for real-time event forwarding.
Laposta
Create, send, and track email newsletter campaigns. Manage mailing lists with subscriber counts and notification settings. Add, update, delete, and bulk-synchronize subscribers across lists with support for upsert and double opt-in control. Define custom fields (text, numeric, date, select) on lists and manage select options. Create segments based on custom field conditions. Build campaign content from HTML or URL import with optional CSS inlining, schedule or send campaigns immediately, and send test emails. Retrieve campaign performance reports including opens, clicks, bounces, and unsubscribes. Configure webhooks for subscriber events (subscribed, modified, deactivated).
Listclean
Verify individual email addresses, submit email batches, inspect verification lists, download CSV results, and retrieve account profile and verification credit balance.
Loom
Retrieve Loom oEmbed metadata, generate fixed or responsive video embed snippets and replace supported Loom links in text. Existing video visibility applies; recording and workspace administration are outside this integration.
Loopsso
Manage Loops contacts and mailing-list subscriptions, discover contact properties and published transactional templates, verify the connected team and check suppression. Submit requested transactional emails or workflow events with optional idempotency keys.
Loomio
Create and manage group discussions, proposals, and polls for collaborative decision-making. Supports multiple voting methods including proposals, score voting, ranked choice, dot voting, and meeting polls. Create discussion threads with Markdown or HTML content and notify recipients. Configure poll options, anonymous voting, result visibility, and closing times. Manage group memberships by inviting users via email and syncing member lists. Retrieve details of discussions and polls.
Mailbluster
Manage email marketing leads, products, and e-commerce orders in MailBluster. Create, read, update, and delete leads (subscribers) with custom fields, tags, and subscription status. Manage custom fields for campaign personalization. Create and manage products for e-commerce tracking. Create and manage orders linked to products and campaigns for revenue attribution. Note: the API does not send emails directly; it manages lead and e-commerce data used by MailBluster's email campaign system.
Mailboxlayer
Validate and verify email addresses in real time. Check email syntax against RFC standards, verify existence via MX record lookup and SMTP checks, detect disposable and free email providers, identify role-based addresses, and receive a deliverability quality score. Supports single and bulk email validation, typo detection with "did you mean" suggestions, and catch-all detection.
Mailcheck
Verify and validate email addresses for deliverability and trustworthiness. Check individual addresses with a trust score, submit lists for batch verification, monitor progress, and download completed results. Retrieves validation data from social networks and public sources to score emails beyond simple MX checks.
Mailcoach
Manage email marketing campaigns, subscriber lists, and transactional emails. Create and send campaigns with HTML or Markdown, schedule sends, and track opens, clicks, bounces, and unsubscribes. Add, update, remove, and segment subscribers using tags. Bulk import subscribers into lists. Create reusable email templates with placeholder fields. Send transactional emails with custom content or templates. Manage suppressions to block specific addresses. Inspect the connected account, discover transactional template names, and monitor subscriber import completion.
Mailercloud
Create and send email marketing campaigns and transactional emails. Manage contact lists, add and update subscribers, and organize contacts with custom properties. Set up email automations to send targeted, personalized emails based on segments, lists, or webforms. Segment contact lists by criteria like subscription status, demographics, or campaign tags. Track campaign performance through webhooks for events like sends, opens, clicks, bounces, spam reports, and unsubscribes. Create and manage webhooks for real-time event notifications. Retrieve account and plan information.
Mailersend
Send and schedule transactional emails and send SMS messages. Manage sending domains, DNS records, sender identities, templates, recipients, and suppression lists. Verify individual email addresses and create, find, process, and inspect bulk verification lists. Retrieve email delivery activity with event filters and pagination.
Mailerlite
Manage email marketing subscribers, campaigns, automations, and signup forms. Create, update, and segment subscribers into groups with custom fields. Build and send email campaigns (regular, A/B split, resend) with scheduling and activity reporting. List and monitor marketing automations and their subscriber activity. Manage signup forms and track form submissions. Connect external e-commerce shops to manage products, orders, carts, and customers for abandoned cart automations, post-purchase emails, and sales tracking. Configure webhooks to receive real-time notifications on subscriber events (created, unsubscribed, bounced, spam reported) and campaign events (sent, opened, clicked).
Mailgun
Send, receive, and track transactional and marketing emails via Mailgun. Manage sending domains, tracking settings, inbound routes, suppressions, allowlists, mailing lists, reusable templates, current logs and metrics, legacy events and stats, stored messages, validation, and domain webhook notifications.
Mailsso
Validate and verify email addresses for deliverability and quality. Check individual emails or bulk-validate lists for format validity, domain and MX record status, catch-all policies, disposable address detection, and blocklist presence. Returns deliverability scores and classifications to help maintain clean email lists. Download completed bulk results as JSON for archiving or import into another system.
Mailsoftly
Create, manage, and search contacts for email marketing campaigns. Organize contacts into lists, apply tags, and send email campaigns with attachments. Create and manage contact lists, add contacts individually or in bulk, and retrieve contact details. Create email drafts, check draft status, and send campaigns. Supports custom contact fields, contact segmentation, and tag-based categorization.
Facebook Messenger
Send and receive messages between Facebook Pages and users through Messenger. List conversations and read recent messages. Create rich message templates including carousels, buttons, receipts, and media. Upload reusable media attachments for later sends. Manage Messenger profile settings such as greeting text, persistent menus, get started buttons, account linking, and ice breakers. Retrieve user profile information. Display typing indicators, read receipts, and reactions. Handle and inspect conversation handover between bots and live agents. Supports the 24-hour standard messaging window and the human agent tag for later replies.
Miro
Create, copy, update, and delete collaborative whiteboard boards. Add and manage sticky notes, cards, text, shapes, images from URLs, embeds, and frames. Connect items, manage tags, discover frame contents, share boards, and manage board members. Retrieve the connected user and authorized team.
Missive
Manage collaborative team conversations across email, SMS, WhatsApp, Facebook Messenger, Instagram, live chat, and custom channels in a shared inbox. Browse, filter, and retrieve conversations by mailbox, team, label, or contact. Send messages and drafts with attachments across all supported channels, including scheduled sends and WhatsApp templates. Inject rich posts with Markdown and structured attachments into conversations to surface external system data. Manage conversation state by closing, reopening, assigning, labeling, and merging conversations. Create, update, search, and sync contacts with rich profile data including custom fields and organization memberships. Manage shared labels with hierarchy, color coding, and visibility controls. Create and manage tasks with states, due dates, assignees, and subtasks. Manage teams, canned response templates, and contact books. Generate asynchronous analytics reports filtered by team, users, labels, and account types.
Mixmax
Read email activity, sequences, tasks, templates, polls, scheduling and analytics. Manage unsent drafts, contacts, meeting types, teams, unsubscribe lists and paused rules, with explicit controls for sending and connected Salesforce operations.
Moosend
Create and manage draft campaigns, discover verified senders, inspect campaign analytics, and manage email lists, subscribers, custom fields and segments. Send campaign or transactional messages to authorized audiences, with partial acceptance receipts and explicit subscription effects.
Msg 91
Send and manage multi-channel communications across SMS, Email, WhatsApp, Voice, and RCS. Generate, send, resend, and verify OTPs. Create and manage message templates with variable substitution. Launch multi-channel campaigns with scheduling, retry logic, and segment-based targeting. Manage contacts, phonebook fields, segments, and user events. Send WhatsApp interactive messages with buttons, lists, and product catalogs. Execute voice calls including text-to-speech, IVR flows, and click-to-call sessions. Send rich RCS messages with cards, carousels, suggested replies, and actions. Validate email addresses, verify domains, and track delivery reports. Manage subaccounts and retrieve messaging logs and analytics.
Mural
Create, manage, and collaborate on visual murals with shared canvases. Add and update canvas widgets including sticky notes, shapes, text boxes, images, arrows, areas, tables, and comments. Organize content with tags, run voting sessions, control timers, and manage private mode for facilitated workshops. Create and manage rooms, workspaces, and templates. Invite users and manage permissions at workspace, room, and mural levels. Search across murals, rooms, and templates. Export murals and duplicate content. Enterprise features include audit logs, eDiscovery, content ownership transfer, SCIM user provisioning, and reporting.
Mxtoolbox
Run DNS, email authentication, blacklist, and network diagnostics. List and retrieve infrastructure monitors and their tags, filter by command or target, and create or delete monitors. Track DNS and network API quotas separately.