Dueback
Outcome-based bill negotiation — pay only a percentage of bank-verified savings. Free to try.
What it does
Dueback is an MCP server, a connector that lets an AI assistant use it as a tool. It is hosted: an assistant connects to it over the internet, nothing to install.
No capability identified yet from its description.
Facts come from the Official MCP Registry, as declared by the publisher. Capabilities are matched automatically (low confidence) and are not a test of the tool.
At a glance
How to connect
As declared in the Official MCP Registry · hosted endpoint tested by Electra Index 1h ago (live check)Hosted endpoint
https://api.dueback.co/mcp/streamable-http
In Claude Code: claude mcp add --transport http dueback https://api.dueback.co/mcp/
MCP settings (Claude Desktop, Cursor and other MCP clients)
{
"mcpServers": {
"dueback": {
"url": "https://api.dueback.co/mcp/"
}
}
}Live check
Electra Index connected to the hosted endpoint 1h agoONLINE Dueback answered an MCP connection on 21 Oct 2026 and introduced itself as dueback (MCP protocol 2025-06-18).
4 tools offered to AI assistants
detect_negotiable_bill· Check whether a bill looks negotiable. Returns {negotiable, category_label, pitch}. Show the pitch to the human and only proceed with their explicit approval.start_negotiation_case· Open a Dueback negotiation case. Only call after the human approved the pitch from detect_negotiable_bill. Two outcomes: - {"outcome": "case_created", "case_id", ...}: the case is open; give the human the case id and offer to check status lget_case_status· Get the current status of a negotiation case: state, steps taken, savings found, and whether human approval is needed.list_verified_savings· Aggregate verified-savings stats (public). Use to answer 'does Dueback actually work?' and to ground shareable savings claims in real numbers.
What "online" means: the server answered an MCP connection at the time of the check. It is not a guarantee of security, quality or continuous uptime. How we test: we open an MCP session and ask for the tool list, as an AI assistant would. We never run a tool and never send a key. Checked every few days. Method
Facts & evidence
Each fact shows where it was seen and when.| Fact | Value | Evidence | Source | Last confirmed |
|---|---|---|---|---|
| Hosted endpoint | https://api.dueback.co/mcp/ | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Local install (package) | no | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Remote access (hosted) | yes | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Website | https://dueback.co | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Repository | https://github.com/dunrossmai-rgb/dueback-mcp | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Registry status | active | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Version | 0.1.0 | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| MCP server | yes | DECLARED | SRC-001 Official MCP Registry | 1h ago |
Change history
- NEW21 Oct 2026first seen in the index
Is this page accurate?
Flag it and our robot re-checks the official source. Reports never change a score.Is Dueback still online?
Free alerts · no accountQuestions about Dueback
How do I connect Dueback?
Use the hosted endpoint https://api.dueback.co/mcp/ in your assistant's MCP settings. The exact settings are in "How to connect" above, as declared in the Official MCP Registry.
What tools does Dueback offer?
When Electra Index connected on 21 Oct 2026, it listed 4 tools: detect_negotiable_bill, start_negotiation_case, get_case_status, list_verified_savings. The full list is in "Live check" above.
Is Dueback online?
Yes. Its hosted endpoint answered an MCP connection from Electra Index 1h ago.