Filter the list of supported mime types for media sideloading.
jetpack_supported_media_sideload_types
jetpack_supported_media_sideload_types-
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filter jetpack_photon_srcset_multipliersFilter the multiplier Photon uses to create new srcset items. Return false to short-circuit and bypass auto-generation.
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filter jetpack_markdown_preserve_patternAllow third-party plugins to define custom patterns that won’t be processed by Markdown.
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action jetpack_user_authorizedFires after user has successfully received an auth token.
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filter jetpack_open_graph_fallback_descriptionFilter the fallback `og:description` used when no excerpt information is provided.
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filter jetpack_options_whitelistFilter the list of options that are manageable via the JSON API.
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filter jetpack_is_staging_siteFilters is_staging_site check.
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filter jetpack_known_stagingFilters the flags of known staging sites.
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action add_option_jetpack_featured_images_enabledFires whenever a theme change is made.
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filter rest_api_thumbnail_sizesFilter the thumbnail sizes available for each attachment ID.
Jetpack Developer Resources 