What Is Nextdoor CAPI?

Nextdoor ads are targeted advertisements on the Nextdoor platform, a social networking service for neighborhoods. These ads are designed to reach local audiences, leveraging user data to provide relevant content based on geographical location and community interests. Businesses can use Nextdoor ads to connect with nearby potential customers, promoting services, events, and offers in a trusted, community-centric environment.

Nextdoor CAPI (Conversions API) allows businesses to track and measure the effectiveness of their Nextdoor ads by directly sending conversion data from their server to Nextdoor. This integration helps improve ad targeting and performance tracking by providing more accurate and comprehensive data on user actions, such as purchases or sign-ups, ensuring that businesses can optimize their advertising strategies effectively.

Product Type: Advertising
Integration Type: Starter Kit & ID Sync
Event Source Type: Web and/or Mobile Browser
Event Scope: Full Funnel

Capabilities

CAPI Endpoint: Integrates with the Nextdoor CAPI endpoint to send detailed event data.
Client and Partner Identification: Enriches events with static identifiers for the partner (metarouter) and client, ensuring each event is properly attributed.
Event Identification and Timing: Maps event-specific data, including unique event IDs and timestamps, ensuring accurate tracking of events.
Source Information: Captures and maps the source of events, including the URL where the event occurred and the type of source (e.g., app or website).
Comprehensive Customer Data Mapping: Utilizes complex transformations to hash and map customer data, including email, phone number, and address details, ensuring customer privacy and data integrity.
Event-Specific Data Enrichment: Provides tailored enrichment for specific events, such as marking an order_completed event with a static purchase identifier.

Considerations

Token Expiration: Your Nextdoor access token will expire in a year after it’s been generated. Please mark your calendar to update the token in the MetaRouter integration a year from when the token was generated.

Limitations

Batching: This integration does not support batching multiple conversions in a single request.

Nextdoor Ads vs Nextdoor CAPI

Nextdoor Ads:

Endpoint: https://ads.nextdoor.com/graphql/api/v1
Filters: Reject events if the ndclid (Nextdoor Click ID) is missing.
Event-Specific Configurations: Static string enrichments for eventName for events like cart_viewed, order_completed, and signed_up

Nextdoor CAPI:

Endpoint: https://ads.nextdoor.com/v2/api/conversions/track
Filters: Allow events based on their names without extra conditions.
- This means that any event with a specified name is accepted and processed.
- No additional conditions or criteria are required for these events to be allowed.
- The filter list is set to accept events simply if their names match the allowed list.
Mappings: Use Lua scripts to hash customer information (email, phone number, address) for increased user matching
Event-Specific Configurations
- For order_completed events:
  - Map order_id, product_context, and order_value with complex transformations
  - Calculate the total order value by summing product prices and adding the currency code

Identity Sync

Sync Available: Yes
Required for Starter Kit: Yes
Prerequisites: Requires ndclid (Nextdoor Click ID) from the Nextdoor sync
Documentation: See Additional Nextdoor CAPI Documentation

Sync Details

Captures the Nextdoor Click ID used for conversion attribution.
Required to link server-side conversions to ad click interactions.
Without this sync, conversion events may not appear in Nextdoor Ads Manager.

Starter Kit Setup Guide

1. Deploy the Nextdoor Sync

To collect the Nextdoor Click ID (ndclid), you must implement a Nextdoor ID Sync.
Refer to the Nextdoor – ID Sync Guide to complete the setup.
This sync enables conversion attribution between Nextdoor ad clicks and server-side events.

2. Gather Credentials

Apply for API access: Please follow the instructions here to apply for API access. Once granted, you will be given a Client ID that you will need to use for this integration.
Access Token: Please follow the instructions here to obtain your Access Token.
Important Note: Your Nextdoor access token will expire one year after it’s generated. Please mark your calendar to update the token in the MetaRouter integration before expiration.

3. Add a Nextdoor – CAPI Integration

From the integration library, add a Nextdoor – CAPI integration.
Then, fill out the following Connection Parameters:

Connection Parameter	Description
`ACCESS_TOKEN`	Access token generated after API access approval. Expires annually.
`DATA_SOURCE_ID`	The Nextdoor data source ID used to attribute conversions.

4. Configure Event Mapping

MetaRouter provides all of the event mappings that Nextdoor – CAPI integrations typically require.
You may add custom events, parameters, or mappings in accordance with Nextdoor’s API documentation.

5. Deploy to Pipeline

In the Pipelines tab, add your Nextdoor – CAPI integration.
Select the correct integration revision.
Click Add Integration to finalize deployment.

Event Mappings

Global

Global mappings will be applied to all events. If your parameter names do not match the Expected Inputs provided, you will need to overwrite the Inputs provided with your own.

Output Key	Description	Expected Input
`partner_id`	String: A unique identifier for the MetaRouter partner.	Enrichment – `metarouter`
`data_source_id` Required	String: The Nextdoor data source ID assigned to the advertiser.	`$$DATA_SOURCE_ID$$`
`event_id` Required	String: Unique identifier for the event.	`messageId`
`event_time_epoch` Required	Integer: Timestamp of the event in Unix epoch seconds.	Expression – converts from `input.timestamp`
`action_source` Required	String: The source of the action (e.g., app, website).	Expression – detects from app or device context
`action_source_url` Required	String: The URL where the action occurred.	`context.page.url`
`customer.click_id` Required*	String: The click ID from Nextdoor used for attribution.	`context.providers.nextdoor.ndclid`
`customer.email` Required*	String: The hashed email address of the customer.	Expression – hashes `traits.email` (SHA256)
`customer.phone_number` Required*	String: The hashed phone number of the customer.	Expression – hashes `traits.phone` (SHA256)
`customer.first_name`	String: The hashed first name of the customer.	Expression – hashes `traits.firstName`
`customer.last_name`	String: The hashed last name of the customer.	Expression – hashes `traits.lastName`
`customer.date_of_birth`	String: The hashed date of birth (YYYYMMDD).	Expression – hashes `traits.birthday`
`customer.street_address`	String: The hashed street address.	Expression – hashes `traits.address.street`
`customer.city`	String: The hashed city (lowercase, no spaces).	Expression – hashes `traits.address.city`
`customer.state`	String: The hashed state (two-letter code).	Expression – hashes `traits.address.state`
`customer.zip_code`	String: The hashed zip/postal code.	Expression – hashes `traits.address.postalCode`
`customer.country`	String: The hashed country (ISO-2 code).	Expression – hashes `traits.address.country`
`customer.client_user_agent`	String: User agent string captured from the browser or app.	`context.userAgent`
`customer.client_ip_address`	String: The client IP address (IPv4 or IPv6).	`context.ip`
`customer.external_id`	String: An external identifier for cross-system matching.	`anonymousId`

*Note: The integration requires at least one or a combination of the following parameters: hashed_email , hashed_phone and / or click_id .

Event Specific

Checkout Started

Output Key	Description	Expected Input
`event_name` Required	String: Identifies the event type as checkout initiation.	Enrichment – `initiate_checkout`
`custom.order_id`	String: The order ID for the checkout session.	`properties.order_id`
`custom.product_context`	Array: List of products included in the checkout.	Expression – maps from `properties.products`

Product Added

Output Key	Description	Expected Input
`event_name` Required	String: Identifies the event type as add to cart.	Enrichment – `add_to_cart`
`custom.product_context.id`	String: Product identifier added to cart.	`properties.product_id`
`custom.product_context.quantity`	Integer: Quantity of the product added.	`properties.quantity`
`custom.product_context.item_price`	Float: Price of the product.	`properties.price`

Product Viewed

Output Key	Description	Expected Input
`event_name` Required	String: Identifies the event type as content view.	Enrichment – `view_content`
`custom.product_context.id`	String: Product identifier viewed.	`properties.product_id`
`custom.product_context.quantity`	Integer: Quantity of the viewed product.	`properties.quantity`
`custom.product_context.item_price`	Float: Price of the viewed product.	`properties.price`

Product Added To Wishlist

Output Key	Description	Expected Input
`event_name` Required	String: Identifies the event type as add to wishlist.	Enrichment – `add_to_wishlist`
`custom.product_context.id`	String: Product identifier added to wishlist.	`properties.product_id`
`custom.product_context.quantity`	Integer: Quantity of the wishlist item.	`properties.quantity`
`custom.product_context.item_price`	Float: Price of the wishlist item.	`properties.price`

Products Searched

Output Key	Description	Expected Input
`event_name` Required	String: Identifies the event type as search.	Enrichment – `search`

Page

Output Key	Description	Expected Input
`event_name` Required	String: Identifies the event type as a page view.	Enrichment – `page_view`

Order Completed

Output Key	Description	Expected Input
`event_name` Required	String: The name of the event (e.g., purchase).	Enrichment - `purchase`
`custom.order_id`	String: The order ID of the purchase.	`properties.order_id`
`custom.product_context`	Array: The context of the products in the order.	N/A - Expression
`custom.order_value` Required	String: The value of the order.	N/A - Expression

Required & Recommended Identifiers

These identifiers must be mapped to Nextdoor CAPI in order for successful user matching to occur. Without the minimum required IDs, any events sent to Nextdoor may not be accurately reflected in reporting.

Attribute	Example	Sync Injector Required?
`click_id` Required	`123abc456def789ghi`	Yes
`email` Required	SHA256 Hash (Lowercase): `c624921e8d93d491b8b47cb1129d8d9d90b9b9a6e10a8db526b22a709cc0e280`	No
`phone_number` Required	SHA256 Hash: `836c1b0b1f3ef6c1c41b67c5c0a05640d5d5e1bcd0339e919c2f1b8a3e54e8f2`	No
`first_name` Recommended	SHA256 Hash (Lowercase): `d53c6d34a40e51011d558ba0cfb46c01ba354baab6587b1b8e7dbaaa5351edc3`	No
`last_name` Recommended	SHA256 Hash (Lowercase): `d0b56f57fa2a8f02bcb573ad81b786cd3f1b21f004f121ac350b2ecf0d7c63b3`	No
`date_of_birth` Recommended	SHA256 Hash (YYYYMMDD Format): `f3b5a5e2c17ad4970cc8d7fc3e4c0f937a8f2a5789ad56b3a7803e48756c20d1`	No
`street_address` Recommended	SHA256 Hash: `8f8fe511c7a6d5730f6fabb20253f4d2f481b604f9b39d6fc71acb46f8b5f44c`	No
`city` Recommended	SHA256 Hash (Lowercase, no spaces): `5e498e48f1dc30ad9f5e07ec3f0a20d21b4e8bcd7073dd0a8ec17d4b8baba17b`	No
`state` Recommended	SHA256 Hash (Lowercase two-letter ANSI abbreviation): `a58f8e32e677139663be8d3b92fc6c9ff1a098f4d3d3768dc542e6e846a237f0`	No
`zip_code` Recommended	SHA256 Hash (First 5 digits for U.S. zip codes): `5e884898da28047151d0e56f8dc6292773603b3c2d5dc6e40b4cc5d1dcb9f33e`	No
`country` Recommended	SHA256 Hash (Lowercase 2-letter ISO 3166-1 alpha-2 code): `b5d4045c7de9afba8c32d0b0b44cd3ba174bff6f0062d6c1e4f7ab27c43d817d`	No

The integration requires at least one or a combination of the following parameters: customer.email, customer.phone_number, and/or customer.click_id.
Nextdoor recommends prioritizing the hashed email (customer.email) when available for highest match accuracy.

Integration Validation

To verify your Nextdoor – CAPI integration:

Check your Nextdoor Ads Manager reporting dashboard for new conversion data.
Conversions are tied to your campaigns and populated from events sent through the Conversions API.
Allow sufficient time for processing before reviewing results.
If you do not see conversions or need detailed validation guidance, please contact your Nextdoor account representative for assistance confirming event delivery and reporting setup.

Additional Nextdoor CAPI Documentation