Bypassing Claude's upload limits, 4x (500 MB → 2 GB)
5 hours ago
- Zernote moved its interface into MCP two months ago, conducting 37 UX researcher interviews.
- 80% of UX researchers use LLMs for interview analysis, but models hallucinate after 7-9 interviews.
- Zernote built tools for folders, interviews, transcripts, and quotes; OAuth enables Claude to cite corpus content.
- Upload limits blocked the UI: screencasts up to 1800 MB exceed Claude's 500 MB per file limit.
- Brain Graph's connector uses a widget (iframe) to bypass file size limits, not tool call bytes.
- MCP Apps (January 2026) let connectors embed iframes in conversations, served from Anthropic's sandboxed origin.
- The file upload path avoids the context window: browser → proxy → backend, using signed URLs for direct storage.
- A microservice checks token availability before processing, returning 403 if insufficient.
- Widget inserts uploaded file IDs and prompts into chat, requesting user's language reply.
- Careful styling made the widget visually cohesive within the conversation.