# Paydro developer documentation > Paydro helps organizers sell tickets, collect registrations and manage events and attendees. The developer host serves documentation. API calls use your organizer/company origin; keep organizer credentials on your server. ## Start here - [Organizer help](https://paydro.com/eng/support): Help with running events and managing bookings. - [Developer portal](https://developer.paydro.com/en-us/): Integration documentation and API reference. - [Paydro summary](https://developer.paydro.com/llm/summary.md): Choose an approach, understand access and find a goal guide. ## User goals - [Sell tickets on my website](https://developer.paydro.com/llm/sell-tickets.md) - [Use an existing shop link](https://developer.paydro.com/llm/use-shop-link.md) - [Find my shop link in Paydro](https://developer.paydro.com/llm/find-shop-link.md) - [Create a ticket shop for my website](https://developer.paydro.com/llm/create-ticket-shop.md) - [Create a Paydro account](https://developer.paydro.com/llm/create-paydro-account.md) - [Show our events](https://developer.paydro.com/llm/show-events.md) - [Set up an event](https://developer.paydro.com/llm/set-up-event.md) - [Manage ticket options](https://developer.paydro.com/llm/manage-tickets.md) - [Collect attendee information](https://developer.paydro.com/llm/collect-attendee-information.md) - [Match our branding and language](https://developer.paydro.com/llm/branding-and-language.md) - [Manage guest registrations](https://developer.paydro.com/llm/guest-registrations.md) - [Help customers with bookings](https://developer.paydro.com/llm/help-with-bookings.md) - [Handle cancellations and refunds](https://developer.paydro.com/llm/cancellations-and-refunds.md) - [Communicate with attendees](https://developer.paydro.com/llm/communicate-with-attendees.md) - [Connect our other tools](https://developer.paydro.com/llm/connect-other-tools.md) - [Understand event performance](https://developer.paydro.com/llm/event-performance.md) - [Accept invoice payments](https://developer.paydro.com/llm/accept-invoice-payments.md) - [Configure payment providers](https://developer.paydro.com/llm/configure-payment-providers.md) - [Understand payouts and settlement](https://developer.paydro.com/llm/understand-payouts.md) - [Prepare financial records](https://developer.paydro.com/llm/financial-records.md) - [Manage entry at the event](https://developer.paydro.com/llm/manage-entry.md) - [Fix and verify an integration](https://developer.paydro.com/llm/fix-integration.md) ## Discovery and downloads - [API catalog](https://developer.paydro.com/.well-known/api-catalog): Machine-readable links to the API and its documentation. - [Complete documentation](https://developer.paydro.com/llms-full.txt): Summary, all 22 goal guides and all developer Markdown guides in one file. ## API contract - [OpenAPI](https://developer.paydro.com/openapi/v2.json): Existing API operations, schemas and examples. ## Guides - [Getting started](https://developer.paydro.com/en-us/docs/getting-started.md): Build your first integration with a ticket shop or a read request to the Paydro API. - [Authentication](https://developer.paydro.com/en-us/docs/authentication.md): Authenticate server requests with Paydro organizer credentials over HTTPS. - [API basics](https://developer.paydro.com/en-us/docs/api-basics.md): Understand service origins, v2 routes, JSON resources, and response conventions. - [Permissions](https://developer.paydro.com/en-us/docs/permissions.md): Understand organizer, company, and event access for integrations. - [Testing your integration](https://developer.paydro.com/en-us/docs/testing.md): Verify requests, parsing, and recovery using an authorized test event. - [Data types](https://developer.paydro.com/en-us/docs/data-types.md): Interpret identifiers, dates, money, flags, and optional legacy fields. - [Writing data](https://developer.paydro.com/en-us/docs/writing-data.md): Send authenticated organizer writes, validate legacy results, and handle retries and side effects. - [Pagination and filtering](https://developer.paydro.com/en-us/docs/pagination-and-filtering.md): Use CakePHP page parameters and the supported resource filters. - [Handling errors](https://developer.paydro.com/en-us/docs/errors.md): Check HTTP status and legacy response bodies before processing data. - [Rate limits and retries](https://developer.paydro.com/en-us/docs/rate-limits-and-retries.md): Handle authentication throttling and transient failures without duplicate imports. - [Working with events](https://developer.paydro.com/en-us/docs/events.md): Find accessible event IDs and retrieve the v2 event resource. - [Ticket products](https://developer.paydro.com/en-us/docs/ticket-products.md): Retrieve an event’s ticket products and understand purchased ticket records. - [Product management](https://developer.paydro.com/en-us/docs/product-management.md): Create, edit, remove and reorder ticket products, including packages, pricing tiers and shared pools. - [Product availability](https://developer.paydro.com/en-us/docs/product-availability.md): Interpret configured capacity, computed stock, pending holds, shared pools, packages and sales windows. - [Categories](https://developer.paydro.com/en-us/docs/categories.md): Read, create, update, hide and delete event ticket categories, with their registration question definitions. - [Category questions](https://developer.paydro.com/en-us/docs/ticket-questions.md): Read and manage category question definitions, order registration questions, and refresh existing ticket snapshots. - [Question types and answers](https://developer.paydro.com/en-us/docs/question-types.md): Supported category question types, option formats, attendee answer payloads and historical registration data. - [Working with orders](https://developer.paydro.com/en-us/docs/orders.md): Read paginated orders, individual order details, and compact snapshots. - [Order management](https://developer.paydro.com/en-us/docs/order-management.md): Edit billing data, confirm or drop reservations, resend messages, mark invoices paid, and cancel eligible orders. - [Working with attendees](https://developer.paydro.com/en-us/docs/attendees.md): Read order lines, attendee registration data, and check-in status. - [Attendee management](https://developer.paydro.com/en-us/docs/attendee-management.md): Edit attendee contact fields and answers, change products, manage archived questions, and resend tickets. - [Waiting lists](https://developer.paydro.com/en-us/docs/waiting-lists.md): List waiting-list entries, read invitation details, invite or remove entries, and configure phone requirements. - [Promo codes and invitations](https://developer.paydro.com/en-us/docs/promo-codes.md): Create and manage event promo codes, read used-code labels, and queue invitations with per-recipient results. - [Ticket check-in](https://developer.paydro.com/en-us/docs/check-in.md): Record authorized ticket check-in, interpret repeat scans, remove scans and export attendance. - [Event traffic analytics](https://developer.paydro.com/en-us/docs/analytics.md): Read traffic totals, recent visits, UTM sources and cities from the organizer analytics projection. - [Notes and organizer data](https://developer.paydro.com/en-us/docs/supporting-data.md): Read companies and organizer profiles, manage event favorites, and add or edit authorized event, order and attendee notes. - [Stage state and live updates](https://developer.paydro.com/en-us/docs/stages.md): Read public stage state, replace it as an event editor, and receive server-sent updates. - [Files](https://developer.paydro.com/en-us/docs/files-and-exports.md): Upload and remove event files, protect bearer download links, and download invoice and ticket PDFs. - [Exports](https://developer.paydro.com/en-us/docs/exports.md): Download event orders, attendees, waiting lists, check-ins and no-shows as authorized CSV or Excel exports. - [Integration recipes](https://developer.paydro.com/en-us/docs/integration-recipes.md): Build a complete event catalog, update attendee answers, and issue and track waiting-list invitations. - [Synchronizing data](https://developer.paydro.com/en-us/docs/synchronizing-data.md): Combine full snapshots, weekly changes, and deletion identifiers safely. - [API coverage and workflow limits](https://developer.paydro.com/en-us/docs/api-coverage.md): Choose documented JSON resources, identify organizer-only workflows, and understand API coverage and compatibility. - [Embed a ticket shop](https://developer.paydro.com/en-us/docs/embed-ticket-shop.md): Add Paydro registration and checkout to your existing website. - [Connect HubSpot](https://developer.paydro.com/en-us/docs/hubspot.md): Connect your Paydro organization to HubSpot and understand event synchronization. - [Connect Mailchimp](https://developer.paydro.com/en-us/docs/mailchimp.md): Choose an audience and configure event subscriber synchronization. - [Privacy and data handling](https://developer.paydro.com/en-us/docs/privacy-and-data.md): Keep personal data and integration credentials under your organization’s control. - [Going live](https://developer.paydro.com/en-us/docs/going-live.md): Check service configuration, access, recovery, and support before launch.