# Flownally API > Build customer messaging, contact context, and automated journeys on top of Flownally. Use the API to connect channels, send and follow messages, keep contacts in sync, and trigger journeys from the systems your team already uses. API: Flownally API 1.0.0 ## Core Documentation - [Authentication](https://docs.flownally.com/authentication.md) - [Errors](https://docs.flownally.com/errors.md) - [Pagination](https://docs.flownally.com/pagination.md) - [Quickstart](https://docs.flownally.com/quickstart.md) - [Complete API Reference](https://docs.flownally.com/api-reference.md) - [OpenAPI YAML](https://docs.flownally.com/openapi.yml) - [OpenAPI JSON](https://docs.flownally.com/openapi.json) ## API Resource Groups - [Messaging](https://docs.flownally.com/reference/messaging.md): Send, receive, and follow customer conversations across connected channels. For outbound messaging, choose an inbox, optionally upload media, send a message, then poll the message resource for delivery state when you are not using webhooks. - [Inboxes](https://docs.flownally.com/reference/inboxes.md): Connect channels and choose where conversations enter your Flownally workspace. - [Contacts](https://docs.flownally.com/reference/contacts.md): Keep customer profiles, tags, custom fields, and imports in sync. - [Journeys](https://docs.flownally.com/reference/journeys.md): Guide contacts through timely, event-driven customer journeys. - [Chatbots](https://docs.flownally.com/reference/chatbots.md): Publish automated chat flows that can answer, qualify, and hand over. - [Events](https://docs.flownally.com/reference/events.md): Record customer moments that can trigger journeys and enrich contact history. - [Teams](https://docs.flownally.com/reference/teams.md): Organize teammates and route conversations to the right group. - [Users](https://docs.flownally.com/reference/users.md): Manage the people working in your Flownally workspace. - [Billing](https://docs.flownally.com/reference/billing.md): Review subscription state and open hosted billing sessions. - [API Keys](https://docs.flownally.com/reference/api-keys.md): Create service accounts and API keys for server-to-server integrations. - [Webhooks](https://docs.flownally.com/reference/webhooks.md): Configure signed webhook deliveries for contacts, conversations, and messages. ## Optional - [Schema Reference](https://docs.flownally.com/reference/schemas.md) - [Sitemap](https://docs.flownally.com/sitemap.xml)