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889889### Content Credentials on generated files
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891On the Claude API, supported image and video files that Claude produces in the code execution sandbox carry [C2PA](https://c2pa.org/) Content Credentials when you download them through the [Files API](https://platform.claude.com/docs/en/build-with-claude/files). [Supported formats](https://opensource.contentauthenticity.org/docs/sdk-repos/c2pa-python/docs/supported-formats/) include PNG, JPEG, GIF, WebP, TIFF, HEIC, AVIF, SVG, MP4, and MOV. The credential is a cryptographically signed manifest embedded in the file's metadata. It identifies Anthropic as the issuer, carries a timestamp, and records the action description "Claude provided this file at the request of a user and may have created or modified the file contents."
891On the Claude API, supported image, video, and audio files that Claude produces in the code execution sandbox carry [C2PA](https://c2pa.org/) Content Credentials when you download them through the [Files API](https://platform.claude.com/docs/en/build-with-claude/files). [Supported formats](https://opensource.contentauthenticity.org/docs/sdk-repos/c2pa-python/docs/supported-formats/) include PNG, JPEG, GIF, WebP, TIFF, HEIC, AVIF, SVG, MP4, MOV, MP3, WAV, FLAC, and M4A. The credential is a cryptographically signed manifest embedded in the file's metadata. It identifies Anthropic as the issuer, carries a timestamp, and records the action description "Claude provided this file at the request of a user and may have created or modified the file contents."
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893893Signing requires no changes to your requests or response handling, and the manifest records nothing about you, your organization, or your request. The file's visible content is unchanged. The manifest adds a few kilobytes, so the downloaded file's size and checksum differ from the file as it exists inside the container. Text files, PDFs, and office documents are not signed because they are not supported formats for signing. Files you upload are stored as-is, including any Content Credentials they already carry.
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