Give Cursor, Claude, and Copilot your coding patterns so they stop suggesting antipatterns, deprecated APIs, and code that violates your standards.
Works with Cursor, GitHub Copilot, Claude, Windsurf, and any AI coding tool.
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You spend hours every week fixing AI-generated code that doesn't match your project patterns, uses deprecated APIs, or ignores your architectural decisions.
Your AI suggested MD5 for password hashing. Again. You've corrected this three times this week, but it has no memory of your coding standards or security requirements.
38% of AI suggestions violate established patternsYou spend 20-30 minutes every day fixing AI-generated code that doesn't match your project structure, uses deprecated APIs, or ignores your architectural decisions.
Developers spend 4-6 hours weekly correcting AI codeYour AI suggests approaches that worked at Google but don't work in your monorepo. It generates API calls to endpoints that don't exist. It has zero context about your actual project.
63% report AI tools lack project contextYou explained your auth patterns to Cursor yesterday. Today it's suggesting a completely different approach. AI tools reset context every session like a new hire with amnesia.
Developers re-explain the same patterns 5-10x weeklyThree developers, three different auth implementations. Everyone's AI suggests something different because there's no shared context about how your team actually builds things.
Teams see 3x more conflicts without shared AI contextYou spent two weeks learning the codebase conventions. Your AI could know all of this on day one, but instead you're manually creating .cursorrules files that go stale immediately.
New developers take 2-3 months to learn team patternsCont3xt gives every AI assistant perfect knowledge of your coding patterns, architectural decisions, and project structure.
Connect once, work everywhere. Cont3xt.dev serves your team's knowledge to Cursor, GitHub Copilot, Claude, and any MCP-compatible tool. No more manual configs, no more context failures.
# Authentication Security Rule
Priority: CRITICAL
Applies to: auth/**, security/**
Rule: Always use bcrypt for password hashing
Never use MD5 or SHA1 for password hashing.
These are cryptographically broken. Always use
bcrypt with a cost factor of at least 12.
# Example:
hash, err := bcrypt.GenerateFromPassword(
[]byte(password),
12 // cost factor
)
Context served: 1,342 times
Effectiveness: 94% helpful# ADR-001: PostgreSQL as Primary Datastore
Status: ACCEPTED
Date: 2024-10-15
Context:
We need a reliable, scalable database that supports
complex queries, JSONB for flexible schemas, and has
excellent Go driver support.
Decision:
Use PostgreSQL 16 with pgx driver
Consequences:
+ Full-text search built-in
+ JSONB for metadata storage
+ Robust transaction support
- Team needs PostgreSQL expertise
Related PRs: #234, #267, #289// MCP Context Response for auth/handlers.go
{
"context": {
"rules": [
{
"priority": "critical",
"content": "Use bcrypt for passwords..."
},
{
"priority": "high",
"content": "All handlers accept context.Context..."
}
],
"adrs": ["ADR-001", "ADR-007"],
"activeWork": {
"sarah.chen": "Refactoring auth module"
},
"tokenBudget": 3200
}
}Built by developers who understand the pain of context failures.
Create, organize, and prioritise team conventions. Set file patterns, tags, and priority levels. Version history tracks all changes.
Document why you chose PostgreSQL over MongoDB. Track decision status, link to PRs, and understand consequences.
Share tested prompts that work. Track effectiveness, usage stats, and team ratings. One-click copy to clipboard.
Automatically extract patterns from PR discussions. Convert code review comments into rules. Never lose important decisions.
Universal compatibility with all MCP-enabled tools. Sub-200ms response times. Smart token budget management.
See who's working on what in real-time. Prevent merge conflicts before they happen. Get alerts about overlapping work.
Track context effectiveness, usage patterns, and team productivity. Identify dead rules and measure onboarding success.
AI-powered relevance scoring ensures only applicable context is served. Respects token budgets. Priority-based selection.
Your source code never leaves your machine. We only store patterns, rules, and architectural decisions. Zero-knowledge architecture means your IP stays yours.
Fetch context from terminal. Create rules on the fly. Integrate with scripts and automation. Works offline with cache. Coming soon
Cont3xt gives every AI assistant perfect knowledge of your coding patterns, architectural decisions, and project structure.
Tell Cont3xt your coding standards once. "Always use bcrypt for passwords." "Auth endpoints need rate limiting." "We use Zod for validation, not Joi." Add your patterns in plain English. No complex config files, no manual .cursorrules maintenance.
One-click installation connects Cursor, Copilot, Claude, and Windsurf. Works with any MCP-compatible tool. Your context automatically syncs across every AI assistant you use. No more maintaining separate configs.
Your AI now knows your patterns. It suggests bcrypt instead of MD5. It uses your actual API endpoints. It follows your project structure. Every suggestion matches how you actually build, not how someone else does.
No credit card required. Cancel anytime. 30-day money-back guarantee.
For individuals getting started
Forever
No credit card required
For power users who code daily
Billed monthly
$100/year if paid annually (save 17%)
For teams that build together
3 user minimum
$200/year per user if paid annually (save 17%)
For organizations with advanced needs
For teams of 50+ developers
All plans include 30-day money-back guarantee. Annual billing available with 20% discount.
Everything you need to know about Cont3xt.dev pricing and features
Cont3xt works with Cursor, GitHub Copilot, Claude, Windsurf, and any AI tool that supports the Model Context Protocol (MCP). That covers 95%+ of AI coding assistants. Setup takes one click for Cursor and Windsurf. Other tools need a quick config file edit (2 minutes, we have guides for each).
.cursorrules files are great for single projects in Cursor. Cont3xt improves on them:
• Works across ALL your AI tools (not just Cursor)
• One context library for all projects
• Version history so you can see what changed
• No manual file syncing across machines
• Automatic updates when you refine patterns
• Optional team sharing (vs emailing files around)
Start with your existing .cursorrules - you can import them directly.
No. Cont3xt adds 50-200ms latency, which is imperceptible in normal use. Your AI responses feel exactly the same speed, but with much better accuracy. We use smart context filtering to send only relevant rules, keeping token usage under 20% of the AI's context window. 80% remains for actual code generation.
Absolutely! Cont3xt is built for individual developers first. The Free tier gives you everything you need to stop your AI from suggesting antipatterns. You can invite up to 2 teammates to try collaboration features. Most of our users start as individuals and only upgrade to Teams when they see value in sharing context with their colleagues.
Seamless upgrade. Your context automatically becomes the team's starting point:
1. Upgrade to Team plan (£30/user/month, 3 user minimum)
2. Invite teammates via email
3. They get instant access to shared context
4. You control permissions (who can edit vs view)
Your existing rules, history, and integrations all migrate. Takes 2 minutes total.
Yes. Cont3xt never sees your actual code. You only tell it:
• Patterns you want followed ("use bcrypt for passwords")
• Architectural decisions ("we use Postgres, not MongoDB")
• Project structure ("@/ alias points to src/")
Your code stays on your machine. Context flows to your AI tools via MCP, but your codebase never leaves your environment.
Yes. We use:
• Encryption at rest and in transit (TLS 1.3)
• SOC 2 compliance (in progress)
• No code storage (only patterns you define)
• Regular security audits
• Data isolation per user/team
For Enterprise customers, we support SSO, audit logs, and can discuss on-premises deployment.
Your AI tools are powerful, but they don't know your codebase. Cont3xt gives them the context they need to suggest code that actually works in your project.
Free forever for individual developers. No credit card required. Start in 5 minutes.