# TickOS > TickOS is the customer support hub for freelancers, agencies and software teams. Every email, web form, help center request and API call becomes a support ticket in one realtime inbox. It also includes a knowledge base portal on your own domain, a public changelog, email broadcasts, visual automations and a REST API with signed webhooks. Unlimited tickets and teammates on every plan, including Free. - Ticket channels: inbound email on your domain, web forms (hosted page, inline/popup/floating embed or your own HTML form), help center portal, REST API. - Plans: Free ($0), Starter ($19/mo), Pro ($79/mo), Enterprise ($249/mo); yearly billing saves 20%. No per-seat pricing. - API base URL: https://api.tickos.dev/v1 (Bearer API keys, OpenAPI spec at /v1/openapi.json). - Help center: yourbrand.tickos.dev with changelog and ticket portal on every plan; knowledge base, community, Docs layout and custom domain on Pro and Enterprise; white-label on Enterprise. - Scheduling: 1 calendar on Starter, 10 on Pro, unlimited on Enterprise; Google Calendar sync (busy times, events and Google Meet links) on Pro and Enterprise. ## Product - [Support Tickets](https://tickos.dev/features/tickets): Turn every email, embeddable web form, portal request and API call into a ticket. Split inbox views, internal notes, snooze, CSAT surveys, Slack and an AI agent that drafts replies from your Knowledge Base — in one fast, realtime inbox. - [AI Agent](https://tickos.dev/features/ai-agent): An AI agent that drafts replies from your Knowledge Base, cites the articles it used and hands off to your team when it isn't sure. Plus automation rules that archive, acknowledge and close tickets for you. - [Broadcast](https://tickos.dev/features/broadcast): Send newsletters, product announcements and customer updates from the same place you do support. Block editor, contact groups, personalization, scheduling and open/click analytics. - [Transactional Email](https://tickos.dev/features/transactional-email): Send receipts, password resets, magic links and alerts from your own domain with a REST API or SMTP. Templates with variables, scheduling, attachments, open and click tracking and delivery status for every email. - [Automations](https://tickos.dev/features/automations): Build visual workflows that react to ticket changes, tags, contact groups and email events. Send emails, wait, branch, update tickets and call webhooks — no code required. - [Changelog](https://tickos.dev/features/changelog): Publish product updates to a public changelog on your help center, send them by email with one block and serve them to your app through the API. - [Knowledge Base Portal](https://tickos.dev/features/knowledge-base): A branded help center on your own domain with a searchable knowledge base, community forum, changelog and customer ticket portal. Track views, feedback and deflected tickets. - [Scheduling](https://tickos.dev/features/scheduling): Booking pages for demos, onboarding and support calls. Google Calendar sync with Meet links, email confirmations and reminders, embeddable widget — and every booking can become a ticket in your inbox. - [Developers](https://tickos.dev/features/developers): A REST API for tickets, email, contacts, campaigns, automations and changelog. Signed webhooks, an email API with SMTP relay, a live playground and request logs. ## Pricing - [Pricing](https://tickos.dev/pricing): Free $0/mo, Starter $19/mo, Pro $79/mo, Enterprise $249/mo. Unlimited tickets and teammates on every plan. ## Developers - [Developer platform](https://tickos.dev/features/developers): REST API, signed webhooks, email API and SMTP relay. - [API documentation](https://tickos.dev/docs): guides and reference for the v1 REST API. - [OpenAPI specification](https://api.tickos.dev/v1/openapi.json): machine-readable reference for every v1 endpoint. ## API docs: Get started - [Introduction](https://tickos.dev/docs/introduction.md): Welcome to the TickOS API. Build support tickets, transactional email and customer flows in minutes. - [Quickstart](https://tickos.dev/docs/quickstart.md): Create your first ticket and send your first email in under a minute. - [Authentication](https://tickos.dev/docs/authentication.md): Authenticate requests with secret API keys via Bearer tokens. ## API docs: Core concepts - [Pagination](https://tickos.dev/docs/pagination.md): Offset-based pagination for list endpoints, and the exceptions to the standard shape. - [Errors](https://tickos.dev/docs/errors.md): Error response format and the HTTP status codes the API returns. - [Rate limits](https://tickos.dev/docs/rate-limits.md): Per-key request limits and 429 handling. ## API docs: Resources - [Tickets](https://tickos.dev/docs/tickets.md): Create, list, update and manage support tickets. - [Ticket messages](https://tickos.dev/docs/ticket-messages.md): Read and add messages to ticket conversations. - [Ticket tags](https://tickos.dev/docs/ticket-tags.md): Assign and remove tags from tickets. - [Emails](https://tickos.dev/docs/emails.md): Send transactional email through your verified domains. - [Customers](https://tickos.dev/docs/customers.md): Manage your customer (contact) records. - [Campaigns](https://tickos.dev/docs/campaigns.md): Broadcast email campaigns to contact groups. - [Changelog](https://tickos.dev/docs/changelog.md): Publish and consume product changelog entries. - [Contact groups](https://tickos.dev/docs/contact-groups.md): Organize customers into groups for campaigns and automations. - [Tags](https://tickos.dev/docs/tags.md): Create and manage ticket labels. - [Inboxes](https://tickos.dev/docs/inboxes.md): Manage inboxes (channels) and their configuration. - [Connections](https://tickos.dev/docs/connections.md): Manage email domain connections and outbound verification. - [Automations](https://tickos.dev/docs/automations.md): Create, manage and trigger automation flows via API. - [Users & members](https://tickos.dev/docs/users.md): List workspace members, add or remove them, send invitations and list workspaces. - [Surveys](https://tickos.dev/docs/surveys.md): Read customer satisfaction (CSAT) survey results and stats. - [API keys](https://tickos.dev/docs/api-keys.md): List and create API keys programmatically. - [Webhooks](https://tickos.dev/docs/webhooks.md): Receive ticket, message and inbox events over HTTPS and verify their signatures. ## API docs: Platform - [Help center & knowledge base](https://tickos.dev/docs/knowledge-base.md): Public help center, knowledge base articles, Markdown and llms.txt for AI, and read-only JSON endpoints. - [Scheduling & booking](https://tickos.dev/docs/scheduling.md): Public booking pages, the embed script, booking events and integrations through automations. - [SMTP relay](https://tickos.dev/docs/smtp.md): Send email through TickOS from any app or library that speaks SMTP. ## API docs: Tools - [OpenAPI spec](https://tickos.dev/docs/openapi.md): Machine-readable specification of the full API. ## Optional - [Full content for LLMs](https://tickos.dev/llms-full.txt): every product page, plan, FAQ and the full API documentation in one file. - [Contact](https://tickos.dev/contact): talk to the TickOS team. - [Privacy](https://tickos.dev/privacy) - [Terms](https://tickos.dev/terms)