Whether to show the WordPress.com WooCommerce Installation menu.
jetpack_show_wpcom_woocommerce_installation_menu
jetpack_show_wpcom_woocommerce_installation_menu-
action jetpack_received_remote_request_responseFired when the remote request response has been received.
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action jetpack_server_sandbox_initFires when the server sandbox is initialized. This action is used to ensure that the server sandbox action hooks are set up only once.
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filter jetpack_block_editor_republicize_featureEnable the RePublicize UI in the block editor context.
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filter jetpack_should_handle_idcAllows sites to opt in for IDC mitigation which blocks the site from syncing to WordPress.com when the home URL or site URL do not match what WordPress.com expects. The default value is either true, or the value of JETPACK_SHOULD_HANDLE_IDC constant if set.
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action jetpack_set_tracks_ajax_hookFires when the Tracking::ajax_tracks() callback has been hooked to the wp_ajax_jetpack_tracks action. This action is used to ensure that the callback is hooked only once.
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filter jetpack_contact_form_email_headersAllow customizing the email headers. Warning: DO NOT add headers or header data from the form submission without proper escaping and validation, or you’re liable to allow abusers to use your site to send spam. Especially DO NOT take email addresses from the form data to add as CC or BCC headers without strictly validating each address against a list of allowed addresses.
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filter jetpack_contact_form_htmlFilter the contact form, allowing plugins to modify the HTML.
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filter jetpack_contact_form_akismet_valuesFilter the values that are sent to Akismet for the spam check.
Jetpack Developer Resources 