Bernstein MCP

Name: Bernstein MCP
Author: sipyourdrink-ltd

by sipyourdrink-ltdversion 0.2.0i★ –iRuns in the cloud

Registry nameio.github.sipyourdrink-ltd/bernstein-mcp

Install

Overview

Description from the maker (original English)

Verifies Bernstein run receipts and hash chains; lists the shipped presets and adapters. Read-only.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiVery new★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs in the cloud
Transport: Streamable HTTP
Category: Other

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
The registry lists no key to fill in.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://mcp.bernstein.run/mcp

Run this in your terminal

claude mcp add --transport http bernstein https://mcp.bernstein.run/mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "bernstein": {
      "url": "https://mcp.bernstein.run/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "bernstein": {
      "type": "http",
      "url": "https://mcp.bernstein.run/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://mcp.bernstein.run/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 8, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account sipyourdrink-ltd, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Otheri

More stars than 0% of the other 18444 servers in this category
Published to the registry more recently than 48% of the other 18444 servers in this category
Basic checks equal to or better than 100% of the other 18444 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Bernstein MCP safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.2.0) reached the registry 2 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, Tethered Trust

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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by formulahendryEarly↓ 66/wk★ 440Updated 14 months ago

Runs on your computer

Install

Remote Desktop Commander

Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.

by desktop-commanderGrowing★ 211Updated 3 days ago

Runs in the cloud✓ desktopcommander.app

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Tethered Trust

Fit, compatibility and recall checks for AI agents before they buy: verdicts, evidence, receipts.

by tetheredtrust.comVery newUpdated today

Runs in the cloud✓ tetheredtrust.com

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

bernstein-mcp

Stateless, read-only MCP endpoint at https://mcp.bernstein.run that verifies bernstein run receipts and hash chains. No account, no key, nothing stored, nothing fetched.

claude mcp add --transport http bernstein https://mcp.bernstein.run/mcp

What it does

Tool	Result
`verify_receipt`	recomputes every chain a run receipt embeds, rebuilds the signed subject, checks the Ed25519 signature; verdict + one line per check, plus the verdict as a signed statement (below)
`explain_receipt`	the same verification, narrated: what the run recorded, where it diverges, what the result does and does not prove
`verify_chain`	walks journal rows, lineage entries or audit events on their own (pass the file text for byte-exact rows); names the first broken link
`verify_trace_record`	TRACE v0.2 conformance checks on one Trust Record, stateless, no account: vendored schema, profile rules, the embedded signature with the key in `cnf.jwk` (EdDSA, ES256, ES384); `record_sha256` is the RFC 8785 digest a child hop links to
`verify_delegation_chain`	walks a set of Trust Records from the leaf to the root and classifies the chain (`verified`, `provenance-invalid`, `authorization-invalid`, `unverifiable`) with the same codes as the delegation-link corpus
`verify_agent_manifest`	stateless check of a signed agent manifest (v0.2 COSE envelope): vendored schema, profile, canonicalization, embedded signature (Ed25519, P-256, P-384); optional trust record cross-check via `references[]`; verdicts `valid` / `invalid` / `unverifiable`
`explain_trace_mapping`	how a bernstein run maps onto a TRACE v0.2 Trust Record, claim by claim; pass a receipt to fill in what its journal answers
`list_presets` / `get_preset`	the compliance presets this release ships
`list_adapters`	the agent adapters bundled with this release
`server_info`	version and limits

Same walk as bernstein verify-receipt, reachable from any MCP client or the paste form at /verify. A verdict's page address is the receipt's own digest.

Trust model

Proves	Does not prove
the embedded rows are exactly the rows that were signed	that the embedded key belongs to who you think (trust-on-first-use; pin the operator's published key yourself)
nothing was edited, reordered, dropped or appended after signing	audit-range HMAC values (keyed by the producing install; their linkage and content hash are still checked)

Pass the receipt file's contents as a string: an already parsed object cannot tell 1 from 1.0, and the reference hashes the original spelling.

Signed verdicts

Every verdict comes back as a DSSE envelope (signed_verdict) signed with this deployment's Ed25519 key: the payload is a JCS-canonical statement naming the receipt by digest, the verdict, every check, and an appraisal block in the EAR status vocabulary (affirming / contraindicated / none). Keep it next to the receipt; anyone can re-check it offline against the public key at /.well-known/bernstein-mcp/keys.json (kid = RFC 7638 thumbprint). The signature covers the DSSE PAE of application/vnd.bernstein.verdict+json, the same construction the receipt itself uses. It attests that *this verifier reached this verdict for these bytes at this time* — nothing about the receipt's producer.

Session receipts

bernstein-attest turns a Claude Code or Codex CLI session into a signed run receipt that this server verifies.

npx bernstein-attest init          # registers hooks for both agents (user scope); --claude-code / --codex / --project to narrow

bernstein-attest link # verify link + one Markdown line for a PR description bernstein-attest verify .bernstein/receipts/ .json

Codex runs project hooks only after they are trusted once with /hooks in an interactive session; codex exec skips untrusted hooks without printing anything. With --project, Claude Code hooks go to .claude/settings.local.json and Codex hooks to .codex/hooks.json; both name the bundle under your home directory, so keep .codex/hooks.json out of version control.

Recorded per tool call: tool name, hashes of its input and output, success flag, repo-relative path for files the call wrote (hash only for paths outside the project), the program name of a shell command (first token, path stripped, at most 32 characters). Not recorded: prompts, model output, command text, file contents, absolute paths. The receipt is sealed at the end of every turn that recorded something new, and every 2 000 rows; the file lives in .bernstein/receipts/ and can be committed with the change it describes. Because later turns reseal the same file, run npx bernstein-attest link right before committing it so the link you paste names the current bytes.

Limits


Request body	1 MiB
Rows per chain	2 000 (larger receipts: verify locally)
Rate	60 requests/min per address on `POST /mcp` and `POST /verify`
Logging	one JSON line per request: route, method, status, JSON-RPC method, tool, verdict, producer family, MCP client name/version, country, colo. Never the address, a header, the body or the receipt

Correctness

vectors/ holds eight golden vectors generated by the Python reference (scripts/gen_vectors.py against the pinned bernstein source). The TypeScript verifier must reproduce each vector's verdict, every check, the binding bytes and the receipt digest byte for byte (test/vectors.test.ts). vectors/session/ holds three frozen session receipts written by bernstein-attest (scripts/gen-session-vectors.mjs).

Development

npm install

npm test # no-fetch guard + vitest npm run typecheck npm run dev # wrangler dev

src/ may not call fetch, eval or new Function; CI fails otherwise. Deploying: see DEPLOY.md. Licence: Apache-2.0.

Bernstein MCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

Tethered Trust

README from the maker

bernstein-mcp

What it does

Trust model

Signed verdicts

Session receipts

Limits

Correctness

Development