Transfer is an MCP server with 4 tools an agent can call, among them receive_file, share_conversation, share_file. It answers at https://upload.83blue.com/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 10 of 10 times since 4 September 2026; the last check, on 17 October 2026, succeeded.
Free no-signup file transfer for AI agents. Files encrypted at rest (video excepted). Share by url.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
receive_file | Use this when you have been given an 83blue transfer link and need the file. Accepts a capability url (https://upload.83blue.com/f/...) on its own, or a share url plus password. Returns metadata including sha256, the file list for zip bundl Inputs: url_or_token, password, max_inline_bytes |
share_conversation | Use this to hand your full working context to another AI: any provider, any model, any chat client. Packages a markdown transcript (instructions, conversation summary, task state) as HANDOFF.md at the root of a zip bundle together with any Inputs: transcript, files, title, expires_days, password |
share_file | Use this when another AI agent (a different machine, model or chat session) or a person needs access to one or more files. Accepts text or base64-encoded binary content; multiple files are zipped into one bundle server-side, so a whole hand Inputs: files, bundle_name, expires_days, password |
share_text | Use this when another AI agent, chat session or person needs text you have: instructions, code, JSON, a prompt for another model. Uploads it as a downloadable file and returns a capability url (one GET fetches it) plus a share url and passw Inputs: content, filename, expires_days, password |
Every block below points at https://upload.83blue.com/mcp. Pick your client and copy.
claude mcp add --transport http transfer https://upload.83blue.com/mcp
{
"mcpServers": {
"transfer": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://upload.83blue.com/mcp"]
}
}
}{
"mcpServers": {
"transfer": {
"url": "https://upload.83blue.com/mcp"
}
}
}{
"servers": {
"transfer": {
"type": "http",
"url": "https://upload.83blue.com/mcp"
}
}
}{
"context_servers": {
"transfer": {
"url": "https://upload.83blue.com/mcp"
}
}
}{
"mcpServers": {
"transfer": {
"serverUrl": "https://upload.83blue.com/mcp"
}
}
}{
"mcpServers": {
"transfer": {
"url": "https://upload.83blue.com/mcp"
}
}
}name: Transfer
version: 0.0.1
schema: v1
mcpServers:
- name: Transfer
type: streamable-http
url: https://upload.83blue.com/mcp{
"mcpServers": {
"transfer": {
"httpUrl": "https://upload.83blue.com/mcp"
}
}
}{
"mcpServers": {
"transfer": {
"type": "http",
"url": "https://upload.83blue.com/mcp"
}
}
}{
"mcpServers": {
"transfer": {
"url": "https://upload.83blue.com/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fupload.83blue.com%2Fmcp&type=streamable_http&id=transfer&name=Transfer
It answered our last check on 17 October 2026 in 123 ms. Over 10 checks since 4 September 2026 it answered 10. Status here comes from Neuronto's own probes, not from the publisher.
Yes. It is published by 83blue.com and served from upload.83blue.com, the vendor's own domain: https://upload.83blue.com/mcp.
4, as returned by the server's own tools/list on 9 September 2026: receive_file, share_conversation, share_file, share_text.
It answered our last check on 17 October 2026 in 123 ms. Over 10 checks since 4 September 2026 it answered 10.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://upload.83blue.com/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: com.83blue.upload. Endpoint host: upload.83blue.com. ARD identifier: urn:air:com.83blue.upload:mcp:transfer.
First indexed 31 August 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.