Attest by DataHubz (verify only) MCP server

Attest by DataHubz: the Attest connector

Attest by DataHubz is document signing and verifiable records. The Attest connector lets your assistant list the agreements you sent or must sign, remind signers, prepare new agreements, verify signed documents and records anchored on the Horizen blockchain, and create Share proofs, zero-knowledge proofs verified on zkVerify. It never reads a document and never signs: documents stay end-to-end encrypted, and each signer signs in Attest with their own passkey.

This repository holds the configuration that installs the connector in Gemini CLI and Cursor. The connector itself is a hosted MCP server at https://attest.datahubz.com/mcp; nothing here runs on your machine.

Documentation: https://attest.datahubz.com/docs/connector

What you can do

turn it is and the audit trail up to completion.

• See your agreements: the ones you sent and the ones waiting for your signature, with their status, signers, whose

day each.

• Remind signers of an agreement you sent: the signing link goes again to the signers whose turn it is, at most once a

Attest's New agreement form, filled in. You attach the PDF and send it in Attest, where it is encrypted in your browser.

• Prepare a new agreement: give the title, signers, signing order, a note and an expiry date, and get a link to

or the file's SHA-256 fingerprint. Attest reports who signed, whether every passkey signature checks out, and the record's anchor on the Horizen blockchain. Anyone can run this check, without an account.

• Verify a signed document: give the code on its signature stamp (ATT-XXXX-XXXX), an agreement, receipt or proof ID,

you name one) and the day the agreement was completed, never the document, its terms or its title. Each proof is submitted to zkVerify for independent verification.

• Prove you signed an agreement without revealing it: a Share proof shows your email address (and a co-signer's, if

time, and list your receipts.

• Record a receipt: anchor a SHA-256 fingerprint on Horizen as proof that the content existed, unchanged, at that

Try: "Which agreements are waiting for my signature?", "Who still needs to sign the agreements I sent?", "Prepare a mutual NDA for Mary Ruiz to sign."

Install

Gemini CLI

gemini extensions install https://github.com/DataHubz/attest-mcp

Or add only the server: gemini mcp add --transport http attest https://attest.datahubz.com/mcp. Gemini CLI finds Attest's sign-in on its own; run /mcp auth attest to sign in, and again if it asks you to later.

Cursor and VS Code

The connector's documentation has one-click install links for both: https://attest.datahubz.com/docs/connector#add. Or add it to Cursor's ~/.cursor/mcp.json (or .cursor/mcp.json in a project), or install the Attest plugin from the Cursor Marketplace once it is listed there:

{
  "mcpServers": {
    "attest": { "url": "https://attest.datahubz.com/mcp" }
  }
}

Cursor finds Attest's sign-in on its own and asks you to sign in the first time it connects. In VS Code, run MCP: Add Server from the Command Palette with the same URL; the entry in .mcp.json is {"mcpServers": {"attest": {"type": "http", "url": "https://attest.datahubz.com/mcp"}}}.

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Shortened. The full README is on GitHub.