> ## Documentation Index > Fetch the complete documentation index at: https://meta-preview.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Parameters These parameters consist of all required event data parameters and any additional data parameters the Conversions API needs to use for ads attribution and/or ads delivery optimization. [The Conversions API](/docs/marketing-api/conversions-api) now supports web, app, offline, and business messaging events. Website events shared using the Conversions API require the [`client_user_agent`](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#client-user-agent), [`action_source`](/docs/marketing-api/conversions-api/parameters/server-event#action-source), and [`event_source_url`](/docs/marketing-api/conversions-api/parameters/server-event#event-source-url) parameters, while non-web events **require only** [`action_source`](/docs/marketing-api/conversions-api/parameters/server-event#action-source). These parameters contribute to improving the quality of events used for ad delivery and may improve campaign performance. By using the Conversions API, you agree that the [`action_source`](/docs/marketing-api/conversions-api/parameters/server-event#action-source) parameter is accurate to the best of your knowledge. | | | | | ------------------------------------------------------------------------------------------------------------------------------------------------------------- | - | - | | ### [Main Body Parameters](/docs/marketing-api/conversions-api/parameters/main-body)- [`data`](/docs/marketing-api/conversions-api/parameters/main-body#data) | | | * [`test_event_code`](/docs/marketing-api/conversions-api/parameters/main-body#test_event_code)### [Customer Information Parameters](/docs/marketing-api/server-side-api/parameters/user-data)- [`em`: Email](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#em) — Hashing required * [`ph`: Phone Number](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#ph) — Hashing required * [`fn`: First Name](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#fn) — Hashing required * [`ln`: Last Name](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#ln) — Hashing required * [`ge`: Gender](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#ge) — Hashing required * [`db`: Date of Birth](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#db) — Hashing required * [`ct`: City](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#ct) — Hashing required * [`st`: State](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#st) — Hashing required * [`zp`: Zip Code](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#zp) — Hashing required * [`country`: Country](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#country) — Hashing required * [`external_id`: External ID](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#external-id) — Hashing recommended * [`client_ip_address`: Client IP Address](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#client-ip-address) — Do not hash * [`client_user_agent`: Client User Agent](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#client-user-agent) — Do not hash * [`fbc`: Click ID](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#fbc) — Do not hash * [`fbp`: Browser ID](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#fbp) — Do not hash * [`subscription_id`: Subscription ID](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#subscription-id) — Do not hash * [`fb_login_id`: Facebook Login ID](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#fb_login_id) — Do not hash * [`lead_id`: Lead ID](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#lead_id) — Do not hash * [`anon_id`: Install ID](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#anon_id) — Do not hash (***Note:** This parameter is for app events only*) * [`madid`: Mobile Advertiser ID](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#madid) — Do not hash (***Note:** This parameter is for app events only*) * [`page_id`: Page ID](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#page_id) — Do not hash * [`page_scoped_user_id`: Page scoped user ID](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#page_scoped_user_id) — Do not hash * [`ctwa_clid`: Click to WhatsApp ID](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#ctwa_clid) — Do not hash * [`ig_account_id`: IG account ID](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#ig_account_id) — Do not hash * [`ig_sid`: Click to Instagram ID](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#ig_sid) — Do not hash | ### [Server Event Parameters](/docs/marketing-api/conversions-api/parameters/server-event)- [`event_name`](/docs/marketing-api/conversions-api/parameters/server-event#event-name) * [`event_time`](/docs/marketing-api/conversions-api/parameters/server-event#event-time) * [`user_data`](/docs/marketing-api/conversions-api/parameters/server-event#user-data) * [`custom_data`](/docs/marketing-api/conversions-api/parameters/server-event#custom-data) * [`event_source_url`](/docs/marketing-api/conversions-api/parameters/server-event#event-source-url) * [`opt_out`](/docs/marketing-api/conversions-api/parameters/server-event#opt-out) * [`event_id`](/docs/marketing-api/conversions-api/parameters/server-event#event-id) * [`action_source`](/docs/marketing-api/conversions-api/parameters/server-event#action-source) * [`data_processing_options`](/docs/marketing-api/conversions-api/parameters/server-event#data-processing-options) * [`data_processing_options_country`](/docs/marketing-api/conversions-api/parameters/server-event#data-processing-options-country) * [`data_processing_options_state`](/docs/marketing-api/conversions-api/parameters/server-event#data-processing-options-state) * [`referrer_url`](/docs/marketing-api/conversions-api/parameters/server-event#referrer-url)### [App Data Parameters](/docs/marketing-api/conversions-api/parameters/app-data)- [`advertiser_tracking_enabled`](/docs/marketing-api/conversions-api/parameters/app-data#advertiser-tracking-enabled) * [`application_tracking_enabled`](/docs/marketing-api/conversions-api/parameters/app-data#application-tracking-enabled) * [`extinfo`](/docs/marketing-api/conversions-api/parameters/app-data#extinfo) * [`campaign_ids`](/docs/marketing-api/conversions-api/parameters/app-data#campaign-ids) * [`install_referrer`](/docs/marketing-api/conversions-api/parameters/app-data#install-referrer) * [`installer_package`](/docs/marketing-api/conversions-api/parameters/app-data#installer-package) * [`url_schemes`](/docs/marketing-api/conversions-api/parameters/app-data#url-schemes) * [`windows_attribution_id`](/docs/marketing-api/conversions-api/parameters/app-data#windows-attribution-id) * [`anon_id`](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#anon_id) * [`madid`](/docs/marketing-api/conversions-api/parameters/customer-information-parameters#madid) * [`vendor_id`](/docs/marketing-api/conversions-api/parameters/app-data#vendor-id)***Note**: See the [Conversions API for App Events](/docs/marketing-api/conversions-api/app-events) documentation for guidance on integrating app events.*### [Standard Parameters](/docs/marketing-api/conversions-api/parameters/custom-data)See a list of all [standard parameters](/docs/marketing-api/conversions-api/parameters/custom-data) users can send to Meta.### [Original Event Data Parameters](/docs/marketing-api/conversions-api/parameters/original-event)- [`event_name`](https://developers.facebook.com/docs/marketing-api/conversions-api/parameters/original-event#event-name-oed) * [`event_time`](https://developers.facebook.com/docs/marketing-api/conversions-api/parameters/original-event#event-time-oed) * [`order_id`](https://developers.facebook.com/docs/marketing-api/conversions-api/parameters/original-event#order-id-oed) * [`event_id`](https://developers.facebook.com/docs/marketing-api/conversions-api/parameters/original-event#event-id-oed) | | ### Conversions API for Lead Optimization If you integrate your CRM system with the Conversions API for lead events, refer to the [CRM Integration](/docs/marketing-api/conversions-api/guides/crm-integration) guide for the required fields. ### See Also * Overview: [`fbp` and `fbc` Parameters](/docs/marketing-api/server-side-api/parameters/fbp-and-fbc) ## Learn More * [Conversions API: Documentation](/docs/marketing-api/facebook-pixel/server-side-api) * [Using the Conversions API](/docs/marketing-api/facebook-pixel/server-side-api/using-the-api) * [Meta Privacy and Data Use Guide](https://www.facebook.com/business/m/privacy-and-data?Data-Use-&-Ads) ![](https://www.facebook.com/tr?id=675141479195042\&ev=PageView\&noscript=1)![](https://www.facebook.com/tr?id=574561515946252\&ev=PageView\&noscript=1)![](https://www.facebook.com/tr?id=1754628768090156\&ev=PageView\&noscript=1)![](https://www.facebook.com/tr?id=217404712025032\&ev=PageView\&noscript=1)