# Dueback Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## Dueback

Negotiate bills and pay only a percentage of verified savings.

- Record: https://musedirectory.ai/connector/dueback
- Category: Finance & Bills
- Developer: Dueback (https://dueback.co)
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 738ms, checked 2026-10-29T10:15:51Z
- Endpoint: https://api.dueback.co/mcp/
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-10-28T15:21:25Z)
- Source: Found in the official MCP Registry (io.github.dunrossmai-rgb/dueback-mcp) https://registry.modelcontextprotocol.io/v0/servers?search=io.github.dunrossmai-rgb%2Fdueback-mcp

Connects to Dueback's bill negotiation service. Muse can check if your bills are negotiable, start negotiation cases, track progress, and show you real savings others have achieved. You pay only if savings are verified.

Example request: "Help me negotiate my internet bill to lower my monthly cost."

How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Dueback to help me. It is a free service with an MCP server at https://api.dueback.co/mcp/. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.

Tools:
- 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 later. - {"outcome": "setup_required", "s
- get_case_status: Get the current status of a negotiation case: state, steps taken, savings found, and whether human approval is needed. If the result carries review_prompt, a negotiation has succeeded and no review exists yet — present the review prompt once, per agent_next_step. bank_status repo
- list_my_cases: List the human's own Dueback negotiation cases (newest first): case_id, status, public bill-type label, counterparty, and amounts for each. Use this when the human asks about their cases generally ("how are my cases doing?") or when you need a case_id you don't already have; then
- list_verified_savings: Aggregate verified-savings stats (public). Use to answer 'does Dueback actually work?' and to ground shareable savings claims in real numbers.

Screening checks:
- MCP handshake: pass (Answered in 935ms)
- Domain against threat feeds (Cloudflare security DNS): pass (api.dueback.co, dueback.co not flagged)
- Published packages against the OSV malicious-package database: n/a (No npm or PyPI package published)
- Hidden instructions or invisible characters in tool text: pass (4 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (No redirects off the domain)
- AI review of purpose and tool behavior: pass (No concerns)