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Parameters
Updated: Dec 13, 2025
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 now supports web, app, offline, and business messaging events.
Website events shared using the Conversions API require the
client_user_agent, action_source, and event_source_url parameters, while non-web events require only 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 parameter is accurate to the best of your knowledge.em: Email — Hashing requiredph: Phone Number — Hashing requiredfn: First Name — Hashing requiredln: Last Name — Hashing requiredge: Gender — Hashing requireddb: Date of Birth — Hashing requiredct: City — Hashing requiredst: State — Hashing requiredzp: Zip Code — Hashing requiredcountry: Country — Hashing requiredexternal_id: External ID — Hashing recommendedclient_ip_address: Client IP Address — Do not hashclient_user_agent: Client User Agent — Do not hashfbc: Click ID — Do not hashfbp: Browser ID — Do not hashsubscription_id: Subscription ID — Do not hashfb_login_id: Facebook Login ID — Do not hashlead_id: Lead ID — Do not hashanon_id: Install ID — Do not hash (Note: This parameter is for app events only)madid: Mobile Advertiser ID — Do not hash (Note: This parameter is for app events only)page_id: Page ID — Do not hashpage_scoped_user_id: Page scoped user ID — Do not hashctwa_clid: Click to WhatsApp ID — Do not hashig_account_id: IG account ID — Do not hashig_sid: Click to Instagram ID — Do not hash
event_nameevent_timeuser_datacustom_dataevent_source_urlopt_outevent_idaction_sourcedata_processing_optionsdata_processing_options_countrydata_processing_options_statereferrer_urlcustomer_segmentation
advertiser_tracking_enabledapplication_tracking_enabledextinfocampaign_idsinstall_referrerinstaller_packageurl_schemeswindows_attribution_idanon_idmadidvendor_id
Note: See the Conversions API for App Events documentation for guidance on integrating app events.
See a list of all standard parameters users can send to Meta.
Conversions API for Lead Optimization
If you integrate your CRM system with the Conversions API for lead events, refer to the CRM Integration guide for the required fields.
See Also
- Overview:
fbpandfbcParameters
Learn More
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