Klave Mcp
@juny-klave/mcp
MCP server that gives Claude the ability to negotiate prices on your behalf — autonomously, privately, and with cryptographic proof of the outcome.
What it does
KLAVE connects Claude to a bilateral negotiation engine. You describe what you want in plain English; Claude calls KLAVE, runs the negotiation through multiple rounds, and reports back with the settled price and a ZK proof reference. Your ceiling is cryptographically bound to the authorization token and never appears in any response — the seller never sees your budget.
What You Can Negotiate
Anything with a price. KLAVE does not require pre-existing listings, platform partnerships, or pre-seeded scenarios. If it has an asking price and you have a ceiling, KLAVE can negotiate it.
Freight and logistics
"Negotiate 200 FEU containers Shanghai to Rotterdam. They're asking $2,806. My ceiling is $2,700."
Software and SaaS
"Get me a better price on this CRM license. 500 seats, they want $75,000 annually. I won't go above $58,000."
Employment and contracts
"A contractor is asking $185/hour for a 6-month engagement. My budget is $150/hour. Negotiate it."
Real estate
"Negotiate our office lease renewal. Landlord wants $42/sqft. We need to be at $35 or below."
Legal and settlement
"Negotiate a settlement. The other party is asking $250,000. My ceiling is $180,000."
Any bilateral negotiation
"They're asking [X]. I won't pay more than [Y]. Negotiate."
Prerequisites
- Node.js 18+
- Claude Desktop or Claude Code
- A KLAVE API key — get one at klave-platform.vercel.app/docs
Install in Claude Desktop
Add to ~/Library/Application Support/Claude/claude_desktop_config.json:
{
"mcpServers": {
"klave": {
"command": "npx",
"args": [
"-y",
"mcp-remote",
"https://klave1-production.up.railway.app/mcp/sse",
"--header",
"x-api-key:YOUR_API_KEY"
]
}
}
}
Replace YOUR_API_KEY with your key from klave-platform.vercel.app/docs.
Install in Claude Code
claude mcp add klave \
--transport sse \
"https://klave1-production.up.railway.app/mcp/sse" \
--header "x-api-key:YOUR_API_KEY"
Run locally (stdio)
git clone https://github.com/juny-klave/klave-mcp.git
cd klave-mcp
npm install
npm run build
Then point Claude Desktop at the local build:
{
"mcpServers": {
"klave": {
"command": "node",
"args": ["/absolute/path/to/klave-mcp/dist/index.js"],
"env": {
"KLAVE_API_URL": "https://klave1-production.up.railway.app",
"KLAVE_API_KEY": "YOUR_API_KEY"
}
}
}
}
The 4 tools
| Tool | What it does |
|---|---|
klave_negotiate | Start a negotiation — any subject, any industry, any price range |
klave_advance | Advance one round — call in a loop until SETTLED or TERMINATED |
klave_status | Get current state and full round history at any time |
klave_verify | Get the ZK proof confirming the settlement was conducted fairly |
Tool sequence
klave_negotiate ← describe what you're negotiating and your ceiling
klave_advance (loop) ← advance round by round until SETTLED
klave_status ← check progress at any time
klave_verify ← get cryptographic proof after settlement
Privacy guarantees
- Your ceiling (
ceiling_price) is passed to the negotiation engine and never appears in any tool response. - The seller's floor price is derived server-side and never a field in any API response.
leaks_detectedin verify responses is sourced from the server — never hardcoded.- Every negotiation generates an auditable ZK proof.
Environment variables (local mode)
| Variable | Default | Description |
|---|---|---|
KLAVE_API_URL | https://klave1-production.up.railway.app | KLAVE REST API base URL |
KLAVE_API_KEY | (empty) | API key |
TRANSPORT | stdio | stdio (Claude Desktop/Code) or http (remote/SSE) |
PORT | 3002 | HTTP port when TRANSPORT=http |
Getting an API key
Sign up at klave-platform.vercel.app/docs.
Developer SDK
If you're building an agent that needs to authorize negotiation programmatically, see the KLAVE SDK (@juny-klave/sdk).
License
MIT
Server Config
{
"mcpServers": {
"klave": {
"command": "npx",
"args": [
"-y",
"mcp-remote",
"https://klave1-production.up.railway.app/mcp/sse",
"--header",
"x-api-key:YOUR_API_KEY"
]
}
}
}Recommend Servers
View Allsummarize chat message
A Serper MCP Server
Playwright MCP server