# Amplifi ## Docs - [Billing, credits, and subscription plans](https://docs.messagesender.ai/account/billing.md): Understand how Amplifi credits work, what each subscription plan includes, how to check your balance, and what happens when credits are exhausted. - [Phone numbers and sending numbers in Amplifi](https://docs.messagesender.ai/account/phone-numbers.md): Learn how your organization's dedicated sending number works, how it is assigned during onboarding, and what to do if you need a different number. - [Team access and organization membership](https://docs.messagesender.ai/account/team.md): Learn how team members are added to an organization, what each role can do, and how to switch between organizations when you belong to more than one. - [REST API endpoints for analytics and reporting](https://docs.messagesender.ai/api/analytics.md): Retrieve message delivery analytics, campaign performance trends, daily time-series data, billing status, and credit balance for your organization. - [Authenticate API requests with Bearer tokens](https://docs.messagesender.ai/api/authentication.md): Amplifi issues short-lived Bearer tokens for API access. Pass your token and organization ID on every request to authenticate and scope data to your org. - [REST API endpoints for campaign management](https://docs.messagesender.ai/api/campaigns.md): Create, schedule, and send SMS/MMS campaigns to contacts or segments. Manage campaign lifecycle from draft through completion with the Amplifi campaigns API. - [REST API endpoints for contact management](https://docs.messagesender.ai/api/contacts.md): Create, read, update, and delete contacts in your Amplifi organization. Filter by tags, textability, opt-out status, and more with keyset pagination. - [REST API endpoints for conversations](https://docs.messagesender.ai/api/conversations.md): List two-way SMS conversations, retrieve message history by phone number, and send replies to contacts. Replies bypass quiet hours and go out immediately. - [REST API endpoints for polls and surveys](https://docs.messagesender.ai/api/polls.md): Create multi-question SMS polls with branching logic, start them immediately or on a schedule, retrieve participants, and check completion progress. - [Automate follow-ups with triggers and actions](https://docs.messagesender.ai/automations/overview.md): Build trigger-based workflows in Amplifi to send messages, update contacts, and move people between segments — automatically, without manual effort. - [A/B test campaign messages to optimize results](https://docs.messagesender.ai/campaigns/ab-testing.md): Send two message variants to a small sample of your audience, compare delivery and reply performance, then send the winning version to everyone else. - [Campaign analytics: delivery, replies, and link clicks](https://docs.messagesender.ai/campaigns/analytics.md): Review delivery rates, reply rates, link click attribution, per-message logs, and A/B test results from the campaign detail page after your campaign sends. - [Compose an SMS or MMS campaign with merge fields](https://docs.messagesender.ai/campaigns/composing.md): Step-by-step guide to building a campaign in Amplifi: pick your audience, write your message, personalize with merge fields, and test before sending. - [SMS and MMS campaigns: overview and key concepts](https://docs.messagesender.ai/campaigns/overview.md): Learn what campaigns are in Amplifi, how campaign statuses work, and which features help you send targeted bulk messages with confidence. - [Schedule campaigns with timezone and quiet hours](https://docs.messagesender.ai/campaigns/scheduling.md): Send your campaign immediately or schedule it for the right moment. Amplifi uses your organization's timezone and enforces quiet hours to keep sends compliant. - [Import contacts via CSV, Excel, or paste](https://docs.messagesender.ai/contacts/import.md): Upload a CSV or Excel file, paste tabular data, or enter contacts manually—then map fields, apply tags, and track results in Import History. - [Manage and organize your contacts in Amplifi](https://docs.messagesender.ai/contacts/overview.md): Learn how to view, search, filter, and manage your contact list—including tags, custom fields, opt-out status, textability, and bulk actions. - [Build saved audience segments in Amplifi](https://docs.messagesender.ai/contacts/segments.md): Create reusable contact segments from filters, preview audience counts, and use segments to target campaigns and polls with precision. - [Two-way inbox for managing SMS conversations](https://docs.messagesender.ai/conversations/inbox.md): Use the Conversations inbox to read, search, filter, and reply to every SMS thread with your contacts — all in one place, with real-time updates. - [What is Amplifi? SMS outreach for campaigns and polls](https://docs.messagesender.ai/introduction.md): Amplifi is an SMS-first outreach platform. Manage contacts, send bulk campaigns, run text-message polls, and handle two-way conversations. - [Organizations and workspaces in Amplifi](https://docs.messagesender.ai/organizations.md): Understand how Amplifi organizations work, how to switch between them, why timezone matters, and what access roles mean for your team. - [Build and launch a text-message poll](https://docs.messagesender.ai/polls/building.md): Create a poll, add questions with branching rules, target your audience, run a test, then start immediately or schedule for a future date and time. - [Text-message polls: surveys with branching logic](https://docs.messagesender.ai/polls/overview.md): Send multi-question surveys over SMS, route participants through branching logic, track completion progress, and share results with stakeholders. - [View and share poll results with stakeholders](https://docs.messagesender.ai/polls/results.md): Review response breakdowns, track participant status, generate a shareable read-only results link, and export poll data for offline analysis and reporting. - [Get started with Amplifi in minutes](https://docs.messagesender.ai/quickstart.md): Set up your organization, import your first contacts, compose a campaign, and send a test message — everything you need before your first send. - [Compliance: opt-outs, quiet hours, and TCPA](https://docs.messagesender.ai/reference/compliance.md): Understand how Amplifi handles opt-outs, enforces quiet hours, checks textability, and suppresses contacts to support your TCPA compliance obligations. - [Merge fields for personalizing SMS messages](https://docs.messagesender.ai/reference/merge-fields.md): Use merge fields to insert contact-specific data—like first name or city—directly into your campaign and poll message text at send time. - [Webhooks for receiving data from external systems](https://docs.messagesender.ai/reference/webhooks.md): Push contact data into Amplifi from a CRM, form builder, or any external system using incoming webhooks, with no manual import required each time. ## OpenAPI Specs - [openapi](https://docs.messagesender.ai/api-reference/openapi.json)