Lucairn Mcp Server
Route agent prompts through Lucairn so PII is pseudonymized before the upstream LLM and each answer comes back with a signed receipt.
Overview
Lucairn MCP is a MCP server for the Ship phase that pseudonymizes PII before LLM calls and returns cryptographically signed receipts per response.
What is this MCP server?
- Pseudonymizes PII before content reaches your chosen upstream LLM
- Returns a cryptographically signed receipt per model response for traceability
- npm package @lucairn/mcp-server v1.2.4 with stdio MCP transport
- Requires LUCAIRN_API_KEY (lcr_live_*) from lucairn.eu; free tier uses BYOK for Anthropic or OpenAI
- Optional LUCAIRN_BASE_URL for gateway endpoint configuration
- Manifest version 1.2.4
- Three documented secret env vars: LUCAIRN_API_KEY plus optional Anthropic and OpenAI BYOK keys
- stdio npm package @lucairn/mcp-server
Community signal: 1 GitHub stars.
What problem does it solve?
Coding agents often paste real customer PII into model prompts, creating compliance risk and no proof of what was redacted.
Who is it for?
Solo builders launching agent features that handle user identifiers, support transcripts, or form data under GDPR-style scrutiny.
Skip if: Purely local offline experiments with synthetic data only, or teams that refuse any third-party gateway in the inference path.
What do I get? / Deliverables
After configuration, prompts flow through Lucairn pseudonymization and you get signed receipts alongside upstream LLM answers.
- PII pseudonymized prompts before upstream model inference
- Cryptographically signed receipt metadata paired with each LLM response
- MCP-accessible Lucairn gateway tools inside your agent client
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Journey fit
Privacy hardening belongs in ship when you are preparing to handle real user data through agents, not only during local prototyping. Lucairn sits under security because pseudonymization, gateway keys, and cryptographic receipts address leakage and audit risk before production traffic.
How it compares
Privacy gateway MCP integration, not a general HTTP scraper or code-review skill.
Common Questions / FAQ
Who is Lucairn MCP for?
Lucairn MCP is for indie developers and small teams who run MCP agents against production-like user data and need PII scrubbing plus signed audit receipts.
When should I use Lucairn MCP?
Use it in the ship security pass when your agent workflows include real PII and you want pseudonymization before Anthropic or OpenAI and verifiable response receipts.
How do I add Lucairn MCP to my agent?
Create a Lucairn API key at lucairn.eu, set LUCAIRN_API_KEY and BYOK ANTHROPIC_API_KEY or OPENAI_API_KEY as documented, then register @lucairn/mcp-server via stdio in your MCP client.