northcinder
Buyer-run, ad-neutral shopping-agent MCP software with deterministic ranking, signed purchase mandates, and a local audit trail.
The Lens
By Erik Loyd, SaaS CEO and former COO/CFO of an AWS Premier Partner.
Updated Aug 2026
NorthCinder is an MCP server that makes a shopping agent show its work. Give it a brief and it returns a ranked shortlist with machine-readable reasons, the offers it rejected and which requirement each one missed, and a store-by-store coverage report. Labeled sponsored offers rank below every organic result.
Setup is one npx command and Node 20. It all runs locally: no account, no hosted control plane, no telemetry. Checkout requires a separate signed mandate that pins the exact offer, quantity, and spending cap.
The catch is age. This went public in August 2026 with two commits from one author, so the neutrality rules are a specification, not something anyone has stress tested. Read the ranking source before you let it spend money.
Free vs Self-Hosted vs Paid
fully freeFree tier: The server is MIT licensed and entirely free. There is no NorthCinder account, no hosted service, and the repository owner explicitly does not operate one.
Self-hosted: This is the only mode. It runs on your machine next to the AI app you already use, and it writes recommendations, approvals, and checkout attempts to a local audit trail. Node 20 or newer is the only prerequisite.
Paid: Nothing to buy, but this is the rare MCP server wired to a payment flow. The signed mandate binds a single purchase to an exact offer, quantity, and spending cap, which is the right control. Treat that cap as the real pricing question.
The server is free. It is also wired to a checkout flow, so the cost that matters is whatever you authorize it to spend.
What to do by team size
- Solo
- free
- Small team
- free
- Medium team
- free
- Large team
- free
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A low score is not a verdict on quality. Young and niche tools start low by design. How we calculate scores
Trust Signals
License: MIT License
Use freely, including commercial. Just keep the license.
Commercial use: ✓ Yes
About
- Owner
- Cinderline (User)
- Stars
- 1,193
- Forks
- 4
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