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io.github.lemmaoracle/mcp

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Verifiable provenance for AI agents — ZK proofs over confidential documents, no plaintext exposure.

Code source Site web Documentation

Installation

Ajoutez ceci à la configuration MCP de votre client (Claude Desktop : claude_desktop_config.json ; Cursor : .cursor/mcp.json ; VS Code et les autres utilisent la même forme « mcpServers »).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http io-github-lemmaoracle-mcp 'https://mcp.lemma.workers.dev/mcp' --header 'Authorization: <Lemma API key as Bearer token. Format: '\''Bearer <LEMMA_API_KEY>'\''. Get a key at https://lemma.frame00.com/services>'
Configuration JSON (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "io-github-lemmaoracle-mcp": {
            "type": "http",
            "url": "https://mcp.lemma.workers.dev/mcp",
            "headers": {
                "Authorization": "<Lemma API key as Bearer token. Format: 'Bearer <LEMMA_API_KEY>'. Get a key at https://lemma.frame00.com/services>"
            }
        }
    }
}
NPM package @lemmaoracle/mcp
Claude Code 
claude mcp add io-github-lemmaoracle-mcp -e 'LEMMA_API_KEY=<your lemma_api_key>' -e 'LEMMA_API_BASE=<LEMMA_API_BASE>' -- npx -y @lemmaoracle/mcp@0.0.17
Configuration JSON (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "io-github-lemmaoracle-mcp": {
            "command": "npx",
            "args": [
                "-y",
                "@lemmaoracle/mcp@0.0.17"
            ],
            "env": {
                "LEMMA_API_KEY": "<your lemma_api_key>",
                "LEMMA_API_BASE": "<LEMMA_API_BASE>"
            }
        }
    }
}

Variables d'environnement

  • LEMMA_API_KEY obligatoire secret Lemma API key (Bearer token). Get one at https://lemma.frame00.com/services
  • LEMMA_API_BASE Optional API base URL. Defaults to production endpoint.

Documentation

Tirée du README du projet sur GitHub, actualisée chaque semaine. Les liens ouvrent GitHub.

Sommaire
  1. Lemma Oracle
  2. Learn more
  3. MCP server
  4. Packages
  5. Contact
  6. License

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

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:

PackageLicense
packages/contracts, packages/relay, packages/passthroughBUSL-1.1 (changes to Apache-2.0 on 2030-05-01)
packages/sdk, packages/spec, packages/mcp, packages/parser, packages/x402Apache-2.0
packages/webPrivate (not distributed)

The root LICENSE file applies as the default. Each package may contain its own LICENSE file that takes precedence.

© 2026 FRAME00 Inc.

🇯🇵 日本語版はこちら / Japanese README

Questions fréquentes

Qu'est-ce que io.github.lemmaoracle/mcp ?

Verifiable provenance for AI agents — ZK proofs over confidential documents, no plaintext exposure.

Comment installer io.github.lemmaoracle/mcp ?

Il fonctionne comme serveur distant. Dans Claude Code : claude mcp add --transport http io-github-lemmaoracle-mcp 'https://mcp.lemma.workers.dev/mcp' --header 'Authorization: <Lemma API key as Bearer token. Format: '\''Bearer <LEMMA_API_KEY>'\''. Get a key at https://lemma.frame00.com/services>'. Pour les autres clients, collez la configuration JSON de cette page dans leurs réglages MCP.

Faut-il une clé API pour io.github.lemmaoracle/mcp ?

Oui. Il attend LEMMA_API_KEY, Authorization, à renseigner dans sa configuration.

io.github.lemmaoracle/mcp est-il open source ?

Son code est public sur GitHub, mais le dépôt ne déclare pas de licence standard.

Qui maintient io.github.lemmaoracle/mcp ?

Il est publié par lemmaoracle. AI.tn le référence sans le maintenir ni le recommander.

Issu du registre MCP officiel. Être listé n'est pas une recommandation : vérifiez le code et les permissions d'un serveur avant de lui donner accès à vos données.