MCP.Market

Negbit MCP server

by ag3ntlab-ai·io.github.ag3ntlab-ai/negbit·v0.1.0

Buy negbit's curated, provenance-verified knowledge bundles with your own x402 wallet. Read-only.

A86/100grade A
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Safety scan
A86/100

full report

Adoption
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0 stars28 downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

Negbit tools (4, 1 write)

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

  • get_bundle

    Return the full live catalog record for one bundle by id (price, sha256, concept/token/file

  • get_preview

    Fetch the free preview text for a bundle (the anti-lemon look-inside: index/README, concept

  • how_to_buywrite action

    Return the EXACT x402 purchase contract for a bundle, read live from negbit's 402 endpoint:

  • search_bundles

    Search negbit's live catalog of OKF knowledge bundles. Omit all args to browse the full

Public scan report

scanner v0.1.9 · 2026-09-26 · same rubric, same numbers if you re-run it

no findings
  • Code scan6 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitylocal package, no credentials required12/15
  • Maintenancelast push 83 days ago12/15
  • Maintainer identityregistry namespace matches repository owner7/10
Overall 86/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Negbit compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
86/100
higher than 72% of 48,255 servers
Tools
4
the typical server has 7
Tools that change things
25%
typical: 0%. Fewer write tools means less an agent can break
Downloads a week
28
more than 15% of 12,191 servers with a package

What its tools let an agent do: 3 read · 1 change

Install Negbit in Claude Code, Cursor or VS Code

Runs npx -y negbit-mcp on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add negbit -- npx -y negbit-mcp
Add to Cursor

What the publisher says

From the Negbit repository's README, as published. We do not edit it. Read it on GitHub

The Negbit Spec

An open quotation model for pre-processed knowledge bundles in machine-to-machine markets.

Version 1.0 · July 2026 · negbit.com · Nicolas Limare, ag3ntlab

This repository is the normative specification of the negbit pricing formula, its calibration defaults, the freshness rules, the domain half-life taxonomy, and the bundle audit protocol. The full derivation, the empirical calibration and the competitive analysis are in the white paper: read it online at negbit.com/paper or download the PDF.

Licensed CC BY-SA 4.0 (see License). The knowledge bundles you price with it remain entirely their owners' property.

1. What a negbit is

AI agents acquire task-relevant information two ways: by burning inference tokens to search, filter and synthesize raw sources, or by purchasing pre-processed, directly consumable context from another agent over machine-to-machine payment rails such as x402. A knowledge bundle is a curated set of text files built for agent consumption. A negbit is the unit this spec prices: one bundle of delivered negentropy, the ordering work that separates a curated bundle from the raw noise it was refined from.

The core claim of the model: the fair price of a bundle is the processing cost it saves its buyer, capped by what the answer is worth, decayed by the freshness of its domain, and split by bargaining weight.

2. The formula

The quote for a bundle of size $S$ tokens, age $a$ days, in a domain with half-life $t_{1/2}$ days:

$$ P^\ \;=\; \beta \cdot \min\!\big[\,\Delta \mathrm{EVSI},\; C{\mathrm{avoided}}\,\big] \cdot 2^{-a/t_{1/2}} $$

with a floor at the seller's amortized production cost per expected sale.

Terms:

3. The avoided cost

$$ C{\mathrm{avoided}} \;=\; (1+r{\mathrm{fail}})\big[\, c{\mathrm{in}}\,\rho\,S \;+\; c{\mathrm{out}}\,\sigma\,S \;+\; c{\mathrm{tool}}\,n \,\big] \;+\; w\,\Delta\tau \;-\; c{\mathrm{in}}\,S \;-\; C_{\mathrm{verif}} $$

Reading it left to right: what the buyer would have spent reading the raw sources, synthesizing them, and paying for tool calls, inflated by the failure rate of autonomous research runs, plus the value of the time saved; minus the cost of reading the bundle itself and the cost of verifying the seller's claims.

The refinement ratio $\rho$ is the load-bearing quantity: how many raw tokens an agent would need to ingest per curated token delivered. Measured on real deep-research agent runs, honest values run 5 to 25 (raw dump ≈ 3, summarized ≈ 7, curated ≈ 15, deep-researched ≈ 25, expert distillation ≈ 35). $\rho$ is also where diffusion bites: knowledge that is ubiquitous and already well organized elsewhere has a collapsed effective $\rho$ regardless of how beautifully it is arranged. The formula prices the rarity of the refinement work, not the beauty of the order.

Calibration defaults (July 2026, from the paper §5)

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Negbit: common questions

Is Negbit MCP server safe?
Yes, by our scan: it is graded A (86/100). Read the Negbit safety report
How do I install Negbit?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Negbit need an API key?
No secret keys are declared. It reads 1 setting from the environment.
Is Negbit maintained?
The last commit was 122 days ago (2026-07-05). The latest release is v0.1.0.
How does Negbit compare with other MCP servers?
safety score 86/100 (higher than 72% of 48,255 servers); tools 4 (the typical server has 7); tools that change things 25% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.