MCP file uploads: 150+ servers with custom flows, working group seeks a standard
bibryam · x · 2026-10-23
Per OpenAI's MCP materials, file workflows already exist across the ecosystem: 150+ MCP servers implement custom upload flows and 100+ offer download tools (uploadfile, downloadinvoicepdf, etc.), but there is no shared standard yet. The MCP File Uploads Working Group is working on a common approach.
Practical tip: put essential server instructions first since ChatGPT may truncate long instructions; the keynote's practical target is 1,000 characters or less with optional detail at the end — guidance, not a guaranteed protocol limit.
Related event: MCPCon lays out MCP roadmap and OpenAI best practices for servers(12 posts)→
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