Blocksee is a blockchain-verified document signing platform that charges $1 per document with no subscription required. It offers zero-custody browser-only processing for maximum privacy or encrypted cloud storage for AI-powered features like automatic field placement and comprehension gating. The platform includes a live MCP server, allowing AI assistants like Claude and ChatGPT to draft, seal, and verify agreements through plain-English conversation.
Funding
Funding not disclosed
Founders
Product
Problem
Traditional e-signature platforms store documents on centralized servers, creating privacy risks for sensitive agreements like NDAs and employment contracts. Users often lack verifiable proof of when a document was signed or whether the signer actually understood its contents, leaving room for disputes and compliance gaps.
Solution
Blocksee provides a blockchain-verified document signing platform with two operational modes. Zero-Custody Mode processes documents entirely in the user's browser, ensuring nothing touches external servers except a cryptographic hash anchored to the blockchain. Encrypted Cloud Mode unlocks AI capabilities such as automatic signature field placement, Proof of Understanding comprehension gating, and document intelligence, while maintaining an auditable trail. The platform also features a live MCP server that connects to AI assistants like Claude, ChatGPT, and Cursor, enabling users to draft, send, seal, and verify agreements through natural language commands. Public verification is available without an account, allowing anyone to confirm a document's integrity on the blockchain.
Target Audience
Primary users are legal professionals, HR teams, and compliance officers who handle sensitive agreements requiring privacy, verifiable audit trails, or proof of signer comprehension, as well as individuals needing occasional notarization-style verification.
Features
- Zero-custody mode processes documents entirely in-browser, with only a cryptographic hash reaching the blockchain
- Encrypted cloud mode enables AI-powered signature field placement and document intelligence
- Proof of Understanding gating requires signers to demonstrate comprehension before completing execution
- Live MCP server connects to Claude, ChatGPT, Cursor, and Windsurf for conversational document management
- Public verification page allows anyone to upload a file and check its blockchain seal without an account
- Optional KYC integration for identity-verified signing workflows