Lemma — Verifiable Provenance For Ai Agents
Lemma Oracle
Give AI proven facts.
Lemma is a cryptographically verified truth layer for agent AI. It lets AI reason over confidential data via zero-knowledge proofs, selective disclosure, and tamper-evident provenance — while raw content stays encrypted.
Every attribute an AI reads through Lemma carries permanent provenance: who issued it, which schema defined it, how it was proven, and where its verification record is anchored.
Learn more
- 🌐 Website: https://lemma.frame00.com
- 📄 Services: https://lemma.frame00.com/services
- ✍️ Blog & essays: https://lemma.frame00.com/blog
- ❓ FAQ: https://lemma.frame00.com/blog/faq
MCP server
@lemmaoracle/mcp is the Model Context Protocol (MCP) server for Lemma,
published on npm and built with the official MCP SDK
(@modelcontextprotocol/sdk). Point Claude Desktop or any MCP-compatible
agent at it:
{
"mcpServers": {
"lemma": {
"command": "npx",
"args": ["-y", "@lemmaoracle/mcp"],
"env": { "LEMMA_API_KEY": "YOUR_API_KEY" }
}
}
}
Tool list, env vars, and contributor build: packages/mcp/README.md · npm
Packages
Public packages in this monorepo:
packages/mcp/—@lemmaoracle/mcp, the Model Context Protocol (MCP) server for AI agents (this is the package above).packages/sdk/—@lemmaoracle/sdk, TypeScript SDK for the Lemma API.packages/spec/—@lemmaoracle/spec, OpenAPI spec + shared TypeScript types.packages/x402/—@lemmaoracle/x402, x402 payment middleware drop-in.
Contact
For partnership and implementation inquiries, please use the contact form: https://lemma.frame00.com/services
License
This repository uses different licenses for different packages:
| Package | License |
|---|---|
packages/contracts, packages/relay, packages/passthrough | BUSL-1.1 (changes to Apache-2.0 on 2030-05-01) |
packages/sdk, packages/spec, packages/mcp, packages/parser, packages/x402 | Apache-2.0 |
packages/web | Private (not distributed) |
The root LICENSE file applies as the default. Each package may contain its own LICENSE file that takes precedence.
© 2026 FRAME00 Inc.
Server Config
{
"mcpServers": {
"lemma": {
"command": "npx",
"args": [
"-y",
"@lemmaoracle/mcp"
],
"env": {
"LEMMA_API_KEY": "YOUR_API_KEY"
}
}
}
}