AI sees [PERSON_1].
You see John Smith.
anonymize.dev is a Privacy-as-Code developer platform designed for software engineers, data scientists, and AI builders who need to prevent PII leakage in AI workflows.
The MCP Server anonymizes your prompts before the AI reads them — and deanonymizes the AI's response before you see it. Deterministic. Reproducible. Cheap. Zero friction.
John Smith <john@acme.com>"
[PERSON_1] <[EMAIL_1]>"
runs until Dec 31, 2026..."
What is Anonymize.dev?
A privacy layer for Claude Desktop, Cursor, VS Code, Windsurf, Continue, and Cline
The Problem
When you use AI coding assistants, you often paste code, logs, or documents containing real customer data—names, emails, API keys, database entries.
That data goes to external servers. Even with good intentions, it's a GDPR risk, a security risk, and a trust issue with your users.
The Solution
Anonymize.dev sits between you and the AI. It automatically detects 285+ types of personal data (names, emails, phone numbers, credit cards, IBANs, IPs...) and replaces them with tokens.
The AI sees [PERSON_1] instead of "John Smith". When the response comes back, we restore the original values. Zero data leakage.
Works with:
Built for Developer Workflows
We detect what matters in your code, logs, and configs
Secrets & Credentials
API_KEY
SSH_KEY
JWT_TOKEN
AWS_SECRET
DATABASE_URL
OAUTH_TOKEN
PRIVATE_KEY
CLIENT_SECRET
Infrastructure & Network
IP_ADDRESS
MAC_ADDRESS
HOSTNAME
URL
FILE_PATH
CONTAINER_ID
Customer PII in Your Data
PERSON
EMAIL
PHONE
ADDRESS
CREDIT_CARD
IBAN
SSN
PASSPORT
Define Your Own Entities
Create custom patterns for your specific use cases: internal user IDs, project codes, proprietary identifiers.
// Your custom regex pattern
CUSTOMER_ID: /CUS-[A-Z0-9]{8}/g
Vibe Coding Leaks Real Data
AI coding assistants see everything in your prompt — customer records, API keys, database credentials
What leaks without protection
- ✕ Customer names, emails and phone numbers in support ticket context
- ✕ API keys and database connection strings in code review prompts
- ✕ JWT tokens and OAuth secrets hardcoded in AI-generated snippets
- ✕ Internal user IDs, order numbers and financial records in SQL queries
- ✕ Medical record data, IBANs and SSNs in log analysis tasks
Protected with anonymize.dev
-
✓
AI sees
[PERSON_1]and[EMAIL_1]— never the real values - ✓ 317 deterministic recognisers catch secrets before they leave your machine
- ✓ Responses come back with real values restored — zero workflow change
- ✓ Works transparently across Claude Desktop, Cursor, VS Code, Windsurf and more
- ✓ GDPR Art. 25 compliant — data minimisation by design, EU servers
AUG 2026
High-risk AI system requirements become enforceable on August 2, 2026. GDPR Art. 5 data minimisation and Art. 25 privacy-by-design — both fulfilled automatically by anonymize.dev's MCP interception layer. Read the developer checklist →
¹ Data Privacy Week 2026 research · ² McKinsey State of AI 2025 · ³ Kiteworks 2026 AI Data Security report
Two Products. One Technology.
Both built on the same round-trip MCP engine — deterministic, reproducible, ISO 27001-certified
API-first MCP Server with fine-grained operator control. Hash names, encrypt cards, mask phones, redact SSNs — each entity type configured independently.
| MCP Tools | 7 |
| Entity types | 285+ |
| Operators | hash · encrypt · mask · redact · replace · keep |
| Entity groups & presets | ✓ |
| Session persistence | 24h · 30-day |
| MCP endpoint | anonym.legal/mcp |
Complete privacy platform. 10 MCP tools with batch processing and image OCR redaction. Plus Chrome Extension and Office Add-in — one account, all integrations.
| MCP Tools | 10 |
| Entity types | 320+ / 70+ countries |
| Batch processing | 1–100 texts/call |
| Image OCR redaction | ✓ 38 languages |
| Also includes | Chrome Ext · Office Add-in · Desktop |
| MCP endpoint | cloak.business/mcp |
317 pattern recognizers — not probabilistic AI. Same input always produces the same token. Auditable, reproducible results.
Anonymizes out, deanonymizes back. The AI works with tokens; you always read real names. Zero workflow change.
Token-based pricing. Free tier: 200 tokens/month. Both products: €0 to start, no credit card required.
ISO 27001:2022 · GDPR · German servers (Hetzner) · Built on Microsoft Presidio.
Two-Way Protection
Anonymizes going out. Deanonymizes coming back. You always read real data.
You Write a Prompt
"Review the contract for John Smith (john@acme.com)"
MCP Server Anonymizes
"Review the contract for [PERSON_1] ([EMAIL_1])"
PII detected and replaced with tokens. Original values stored securely.
AI Processes Safely
The AI only sees anonymized tokens. No real PII ever leaves your machine.
Auto-Deanonymized Response
THE KEY FEATURE
"The contract for John Smith includes..."
Tokens are replaced with real values before you see the response. Unlike one-way masking tools — you always read real names, not placeholders.
Quick Start
Get protected in under a minute
{
"mcpServers": {
"anonymize": {
"command": "npx",
"args": ["-y", "@anthropic-ai/mcp-server-anonym-legal"],
"env": {
"ANONYM_LEGAL_API_KEY": "your-api-key"
}
}
}
}Claude Desktop config (stdio). For Cursor, VS Code, Windsurf, Continue or Cline → Platform Guides
27001
Simple Pricing
Token-based billing. Pay for what you process.
Ready to protect your data?
Start with our free tier. Upgrade when you need more.