MCP.Market

Chamber MCP server

by ceedot-rock·io.github.ceedot-rock/json-chamber-mcp·v1.2.0
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Two-key JSON seal/open. Cloak needs a live license. Open is keys-only.

B82/100grade B
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Safety scan
B82/100

full report

Adoption
Growing

0 stars97 downloads/wk

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

Chamber tools (5)

write = sends, deletes, buys or posts

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

  • benefit_check

    Entropy + bias gate for $1900 tier. Always available. No TRU8.

  • chamber_cloak

    Seal JSON/text with φ-split + AES-256-GCM. Requires live license.

  • chamber_info

    Package info, cloak license ($9/mo · $99/yr), open is keys-only.

  • chamber_open

    Open a sealed chamber blob. Keys only — no license, no clock.

  • chamber_status

    License status: eval remaining hours, purchased, or dead.

Public scan report

scanner v0.1.10 · 2026-10-03 · same rubric, same numbers if you re-run it

1 medium
  • Code scan7 source files scanned20/25
  • –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 17 days ago15/15
  • Maintainer identityregistry namespace matches repository owner6/10

Findings (1)

  • mediumeval / new Function usedexec.eval
    dist/license.js: …false, reason: "open-source eval (no VERIFIEDDR_API_KEY)", }; …
Overall 82/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Chamber compares

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

Safety score
82/100
higher than 63% of 48,243 servers
Tools
5
the typical server has 7
Tools that change things
0%
typical: 0%. Fewer write tools means less an agent can break
Downloads a week
97
more than 62% of 12,306 servers with a package

What its tools let an agent do: 5 read

Install Chamber in Claude Code, Cursor or VS Code

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

claude mcp add json-chamber-mcp -- npx -y json-chamber-mcp
Add to Cursor

What the publisher says

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

json-chamber-mcp

Chamber MCP — seal / open JSON. Slid Phi Labs.

Cloak (seal new JSON) needs a live license. Open of an already-sealed blob is both keys, no extra payment. Ciphertext does not expire.

Install / run

npx -y json-chamber-mcp
{
  "mcpServers": {
    "json-chamber": {
      "command": "npx",
      "args": ["-y", "json-chamber-mcp"],
      "env": {
        "CHAMBER_MASTER_SECRET": "your-high-entropy-secret"
      }
    }
  }
}

Discovery

Hosted lab MCP (PCC + catalog): POST https://www.slidphilabs.com/mcp · Smithery: https://smithery.ai/servers/slidphi/lab

Pricing

Prices live on https://www.slidphilabs.com/chamber

Tools

Hop-gate (ScanChunk / Rider SoT)

Admission layer in front of seal/open. Seal/open APIs are unchanged. No SettleHop / x402.

Wire is exact text (Agent-Rider agent-rider-c / PR #22), not JSON:

CUNI ScanChunk
url=https://example.com/
etag="abc"
hash=sha256:…
agent_id=agt_1

Fields (allowlist): url · etag · hash · agentid. Gate result wire** is a single exact-text code string (not a JSON body).

Live reject.log is TSV ISO\tcode\tpreview (mirrors agent-rider-c/reject.log); preview truncates ~120 and flattens newlines. Extra-key values never rehydrate as next machine input.

PCC ≠ payment — PCC is the compression/storefront face; hop-gate codes are admission control, not billing.

MCP tools: chamberhopgate, chamberhopreject_log.

Related

  • Python SDK: https://github.com/ceedot-rock/json-chamber-sdk
  • Product: https://www.slidphilabs.com/chamber
  • Contact: corey@slidphilabs.com

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

Chamber: common questions

Is Chamber MCP server safe?
Mostly: it is graded B (82/100). Read the Chamber safety report
How do I install Chamber?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Chamber need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Chamber maintained?
The last commit was 50 days ago (2026-09-17). The latest release is v1.2.0.
How does Chamber compare with other MCP servers?
safety score 82/100 (higher than 63% of 48,243 servers); tools 5 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.

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