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PopNx MCPMCP servers for people who use AI · explained in plain words
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Orphograph

by Orphographversion 0.1.6i★ 0iRuns on your computer
Registry nameio.github.Orphograph/orphograph

How to install

What it does

Anchor a file's SHA-256 fingerprint to Bitcoin. The file never leaves the device.

  • Connects Runs on your computer
  • Account or key No key needed
  • Category Crypto & blockchain

Install

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

Passed 3/3 checks · Runs on your computer

First: which AI do you use?

Pick your app and the steps appear below.

Works with Claude, with some setup first

No key, nothing to install · Only the Claude desktop app (Windows or Mac), not the web or phone

  1. Download the maker’s installer

    Download the maker’s .mcpb file

    The .mcpb file comes straight from the maker; we do not change it

  2. Double-click the file, then click Install in the Claude desktop app

  3. Try it

    Use Orphograph and tell me what you can do for me, then show me one thing

    ✓ If Claude says it is using Orphograph or shows a Orphograph tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

ChatGPT cannot connect Orphograph yet

Orphograph runs on your computer, but ChatGPT can only connect servers that run on the web

What you can do instead

A · Use an app that can connect Orphograph

  • No key, nothing to install · Only the Claude desktop app (Windows or Mac), not the web or phone

B · Others in Crypto & blockchain that work with ChatGPT

Picked from the most used in the same category, only ones that connect by address with no key

Claude Code cannot connect Orphograph yet

The maker only provides an installer for the Claude desktop app

What you can do instead

A · Use an app that can connect Orphograph

  • No key, nothing to install · Only the Claude desktop app (Windows or Mac), not the web or phone

Cursor cannot connect Orphograph yet

The maker only provides an installer for the Claude desktop app

What you can do instead

A · Use an app that can connect Orphograph

  • No key, nothing to install · Only the Claude desktop app (Windows or Mac), not the web or phone

VS Code cannot connect Orphograph yet

The maker only provides an installer for the Claude desktop app

What you can do instead

A · Use an app that can connect Orphograph

  • No key, nothing to install · Only the Claude desktop app (Windows or Mac), not the web or phone

Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.

See every app that uses MCP →

JSON settings are under “For developers” below

Stuck? Ask people who use Orphograph💬 Discussion →
For developers: Terminal commands and JSON settings

Values you fill in

  • ORPHO_API_KEY secret env
    Optional API key issued from https://orphograph.com/account.html. Without it, anchors are subject to the free-tier rate limit (three anchors per twenty-four hours per IP). With it, the customer's sub…
  • ORPHO_BASE_URL env
    Base URL for the Orphograph API. Defaults to https://orphograph.com. Override only for testing or self-hosted instances.
  • ORPHO_X402_PAYER_KEY_FILE env
    Optional. Path to a chmod-600 file holding the hex private key of a dedicated Base wallet with USDC. With ORPHO_X402_DAILY_CAP_CENTS set too, anchors past the free tier are paid with x402 (1 cent tod…
  • ORPHO_X402_DAILY_CAP_CENTS env
    Optional. The most this server may pay in one UTC day, in cents. Paying stays off unless this and ORPHO_X402_PAYER_KEY_FILE are both set.
  • ORPHO_X402_MAX_CENTS_PER_CALL env
    Optional. The most one anchor may cost, in cents. Default 5.

Descriptions are as written by the maker.

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

At a glance

Downloads per weeki
Not on npm/PyPI
Connection
Runs on your computer
Latest versioni
0.1.6
Published to registryi
Nov 6, 2026
Code last changedi
Nov 12, 2026
Maker
Orphograph
Packages
mcpb: …/orphograph-mcp-0.1.6.mcpb
Registry status
Active

Which apps can use it

Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.

Run on your computer in

ClaudeGooseLM StudioMsty StudioCherry StudioVisual StudioWindsurf (Devin Desktop)ZedKiroClineContinueJetBrains AI AssistantCodex CLIGemini CLIOpenCodenodecodeWarpLibreChatRaycast

All apps, with pros and cons →

Related guides

Guide 85 checks before you install an MCPAbout 2 minutes each: check its page on our site and the permission request in your AI app before you say yes.4 min read

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

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 14, 2026

  • ✓ Pass

    Maker matches the repo

    The registry name was verified with the GitHub account Orphograph, which owns the repo

  • ✓ Pass

    Still maintained

    Code last changed 2 days ago

  • ✓ Pass

    Has a licence

    Uses MIT

  • – Not applicable

    Endpoint responds

    This one runs on your computer; there is no internet endpoint

  • – Not applicable

    Sign-in with OAuth

    Runs on your computer and uses local settings instead

  • … Not checked yet

    No hidden instructions in tool descriptions

    Runs on your computer; we can only read tool lists from internet endpoints

Discussion

Ask, share a tip or report that it does not work. Sorted by what people marked helpful.

No posts yet. Be the first to ask or share.

Posts here are written by users, not the PopNx team.

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User reviews

No reviews yet

Sign in with Google to write a review

Compared with others in Crypto & blockchaini

  • More stars than 0% of the other 1682 servers in this category
  • Published to the registry more recently than 86% of the other 1682 servers in this category
  • Basic checks equal to or better than 100% of the other 1682 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 Orphograph safe?

It passed 3 of 3 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 on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed 2 days ago, and the latest version (0.1.6) reached the registry 8 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need MCPB on your computer.

What can I use instead?

In the same category: Solana MCP by Vybe, Oracle3 prediction-market arbitrage checks, Polymarket Paper Trader

Others in the same category

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

Solana MCP by Vybe

Solana MCP developer toolkit: wallets, trades, markets, PnL, transfers, onchain, swaps & API tools.

by vybenetworkGrowing★ 2.7K Stars for the whole repoUpdated 6 months ago

Runs in the cloud
How to connect

Polymarket Paper Trader

Polymarket paper trading for AI agents: $10k paper money, real order books, official fees.

by agent-nextGrowing↓ 226/wk★ 507Updated 29 days ago

Runs on your computer
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.

Orphograph MCP server

A single-file Model Context Protocol server that lets a Claude / Claude Code / Cursor / any-MCP-host instance anchor files to the Bitcoin chain via Orphograph without the file ever leaving the user's machine.

mcp-name: io.github.Orphograph/orphograph

  • License: MIT
  • Dependencies: Python ≥ 3.9 standard library only. Also on PyPI as orphograph-mcp 0.1.1.
  • Lines of code: ~310, single file.
  • Protocol: MCP 2024-11-05 over stdio.

Install

Save the script anywhere:

curl -sSL https://orphograph.com/mcp/orphograph_mcp.py -o ~/bin/orphograph_mcp.py

Then register it with your MCP host.

Claude Desktop (~/Library/Application Support/Claude/claude_desktop_config.json)
{

"mcpServers": { "orphograph": { "command": "python3", "args": ["/Users/YOU/bin/orphograph_mcp.py"], "env": { "ORPHO_API_KEY": "" } } } }

Claude Code
claude mcp add orphograph python3 /Users/YOU/bin/orphograph_mcp.py

Or edit ~/.claude/settings.json and add the same mcpServers block.

Cursor (~/.cursor/mcp.json)
{

"mcpServers": { "orphograph": { "command": "python3", "args": ["/Users/YOU/bin/orphograph_mcp.py"], "env": { "ORPHO_API_KEY": "" } } } }

Tools exposed

ToolPurposeAuth
orphograph_anchor_file(path)Hash a local file and register the fingerprint on Bitcoin.Optional API key
orphograph_anchor_folder(path)Hash a whole folder into an RFC-6962 Merkle tree and anchor one root covering every file.Optional API key
orphograph_anchor_output(text, …)Hash generated output (an agent result, a transcript) in-process and anchor it. Accepts an optional zk_proof. The fingerprint is public on the receipt, so for short or guessable output pass salt: true: it anchors SHA-256(salt + text), returns salt_hex (never transmitted) and needs it to verify. Every anchor reply says bitcoin_status: pending until the calendars commit to a Bitcoin block (usually hours), then confirmed.Optional API key
orphograph_verify_receipt(receipt_id)Look up what the office recorded for a receipt. A lookup — it does NOT consult the chain; run ots verify for that.None
orphograph_verify_lineage(receipt_id)Walk an edit-lineage chain back through its committed parents.None
orphograph_list_vault(limit?)List the subscriber's receipts.API key required
orphograph_anchor_run(steps, label?)Anchor every step of an agent run under one receipt; each step provable alone.None
`orphograph_verify_output(receipt_id, text \sha256_hex, salt_hex?)`Check whether a receipt covers an exact output, trusting only the anchored hash. Pass salt_hex for an output anchored with a salt.None

Privacy contract

  • The file body never leaves the device.
  • The script computes SHA-256 + SHA-512 in-process and transmits only those fingerprints to https://orphograph.com/api/anchor.
  • The script makes no network call until a tool is explicitly invoked by the host.
  • File reads stream in 1 MB chunks; large files do not load into memory.

Configuration

Environment variablePurpose
ORPHO_API_KEYOptional. Issued from orphograph.com/account.html. Without it, the install is rate-limited to the free tier (3 anchors per 24 hours).
ORPHO_BASE_URLOptional. Defaults to https://orphograph.com. Override for testing or self-hosted instances.
ORPHO_X402_PAYER_KEY_FILEOptional (0.1.6). Path to a chmod 600 file holding the hex private key of a dedicated Base wallet with USDC. With the daily cap below, anchors past the free tier are paid with x402. The key never leaves the machine.
ORPHO_X402_DAILY_CAP_CENTSOptional (0.1.6). The most the server may pay in one UTC day, in cents. Paying stays off unless this and the key file are both set.
ORPHO_X402_MAX_CENTS_PER_CALLOptional (0.1.6). The most one anchor may cost, in cents. Default 5.

With paying on, the server pins the USDC contract, its signing domain and the chain (Base); a 402 asking for anything else, or for more than either cap, is declined and nothing is signed. Spending is recorded in ~/.orphograph/x402_spend.json. A paid result carries x402_payment with the amount and the on-chain transaction.

Tiers and limits

TierCapPrice
Free3 anchors / 24h$0
Writer Pack25 anchors, never expires$5 one-time
Pack of Two Hundred200 anchors, never expires$20 one-time
Standing OrderUnrestricted anchoring$9 / month
Agents (x402)Past the free tier, per anchor1 cent in USDC on Base

Verification

The MCP server only issues calls. Every receipt it produces can be checked without this office, in two independent steps:

  1. Structure — the open-source verifier at github.com/Orphograph/Orphograph re-derives the hashes and checks the receipt offline. It makes no network calls of its own.
  2. Chain — the OpenTimestamps client (ots verify) confirms the commitment actually landed in a Bitcoin block. The bundled verifier will invoke it for you when passed --ots.

Only step 2 consults Bitcoin.

Reporting issues

Open an issue at the public repo, or write to hello@orphograph.com.