# Docs

- [Introduction](/): Build on LettrLabs — send direct mail programmatically, track attributions and conversions, and react to events in real time.
- [Order of operations](/order-of-operations): The end‑to‑end path to send your first order — find a template, create the order, add recipients, and check out.
- [Creating an Order](/creating-an-order): Generate a direct‑mail order from a template and send it to your recipients.
- [Automations vs. creating an order](/automations-vs-creating-an-order): When to use the app's Automations and when to create orders directly with the API.
- [Attributions and Conversions](/attributions-and-conversions): Record conversions against the mail you send and read them back for reporting.
- [Authentication & API keys](/authentication-api-keys): Generate a public API key in the LettrLabs app and authenticate requests with the X-API-KEY header.
- [Inbound webhooks](/inbound-webhooks): Send data to LettrLabs at POST /v1/webhooks/{guid}, with optional HMAC‑SHA256 signature verification and an optional per‑webhook API key.
- API Reference: Every public LettrLabs API operation, grouped by area, with an interactive request console.
  - [API Reference](/api-reference): Every public LettrLabs API operation, grouped by area, with an interactive request console.
  - Profile
    - [Returns the authenticated user's profile](/api-reference/profile/v1-me-get): Returns profile data for the user authenticated by the supplied API key.
  - Orders
    - [Retrieve statistics from order ids](/api-reference/orders/v1-order-analytics-get): Retrieve statistics from order ids
    - [Retrieve all open API orders](/api-reference/orders/v1-order-get): Retrieve all open API orders
    - [Checkout Summary](/api-reference/orders/v1-order-id-checkout-get): Calculate and retrieves the line item cost, production and estimated delivery details for a specific order for review prior to executing the checkout. This is not required to be called before executing a checkout.
    - [Initiates the checkout process for a specified order using its unique Order ID](/api-reference/orders/v1-order-id-checkout-post): Initiates the checkout process for a specified order using its unique Order ID
    - [Deletes an order that is in draft or edits needs status](/api-reference/orders/v1-order-id-delete): Deletes an order that is in draft or edits needs status
    - [Retrieve the PDF proof document for a specified order](/api-reference/orders/v1-order-id-proof-get): Retrieve the PDF proof document for a specified order
    - [Retrieve the PDF proof document for a specified order](/api-reference/orders/v1-order-id-proof-recipient-get): Retrieve the PDF proof document for a specified order
    - [Delete recipients associated with a specific order](/api-reference/orders/v1-order-id-recipients-delete): Delete recipients associated with a specific order.
    - [Retrieve a list of recipients associated from a specific order](/api-reference/orders/v1-order-id-recipients-get): Retrieve a list of recipients associated from a specific order.
    - [Append recipients to a specified order using its unique Order ID](/api-reference/orders/v1-order-id-recipients-put): Append recipients to a specified order using its unique Order ID
    - [Generate an order using a specified template ID](/api-reference/orders/v1-order-post): Generate an order using a specified template ID
    - [Retrieve financial data from order ids](/api-reference/orders/v1-order-transaction-get): Retrieve financial data from order ids
  - Conversions
    - [List all conversions](/api-reference/conversions/v1-conversions-get): Retrieves all conversions for the authenticated user
    - [Delete conversions](/api-reference/conversions/v1-conversions-id-delete): Marks a specific conversion for deletion by validating its status and preparing for removal. Client must subsequently check deletion status via status endpoint.
    - [Check the status of a specific conversion](/api-reference/conversions/v1-conversions-id-status-get): Returns the processing status of a specified conversion by its ID
    - [Post multiple conversions](/api-reference/conversions/v1-conversions-post): Posts multiple conversions with validation. Returns validation information and processes valid records even if some are invalid.
  - Automations
    - [Gets Integration Orders](/api-reference/automations/v1-integration-orders-get): Gets the integration orders of the logged in
    - [Post a request for Proximity search around point (lat, lng)](/api-reference/automations/v1-integration-orders-id-by-proximity-post): Post a request for Proximity search around an address tied to specified integration order
    - [Post a recipient into a integration order](/api-reference/automations/v1-integration-orders-id-recipients-post): Posts recipient in the specified integration order
  - Order Recipient Analytics
    - [Updates order recipients statistics when a QR Code is scanned](/api-reference/order-recipient-analytics/v1-order-recipients-statistics-post): Updates order recipients statistics when a QR Code is scanned
  - Address Book
    - [Post a request to add a new recipient into address book](/api-reference/address-book/v1-zapieractions-address-book-post): Post a request to add a new recipient into address book