A Model Context Protocol server that gives any MCP client (Claude Desktop, Cursor, your own agent) two economic-safety tools from — the x402-native — paid per call in USDC, no accounts:
概览
A Model Context Protocol server that gives any MCP client (Claude Desktop, Cursor, your own agent) two economic-safety tools from — the x402-native — paid per call in USDC, no accounts: It is a (https://api.getplexa.com) — it pays a 402 automatically, signs the USDC authorization with your wallet, and never sees your key. The liquidity engine stays behind the API. A generic wallet guard answers "can I sign this transaction?". It can't answer the question an automated trader actually needs: what price will this swap really fill at under my size, and is this token a trap (rug / honeypot / thin liquidity)? Plexa answers both. This package puts those answers one tool-call away inside any MCP-speaking agent. Nothing to install — point your MCP client at the package via npx. It is fetched and run on demand. Add to ~/.cursor/mcp.json (or ) — the same mcpServers block as above. Restart the client. You should see the plexa_quote and plexa_pretrade_check tools available.
README
以下为原文 README 节选，完整内容请查看原文。
@getplexa/mcp — Plexa MCP server
A Model Context Protocol server that gives any MCP client (Claude Desktop, Cursor, your own agent) two economic-safety tools from Plexa — the x402-native economic-safety layer for trading agents — paid per call in USDC, no accounts:
| Tool | Wraps | Price | Returns |
|---|---|---|---|
plexa_quote |
POST /v1/quote |
$0.02 | Executable fill price under size (not mid/spot), price impact (bps), realizable depth, per-leg route, worst-case slippage, confidence — from canonical on-chain quoters on Base, Polygon & Arbitrum. |
plexa_pretrade_check |
POST /v1/pretrade/check |
$0.05 | Two levels. verdict: avoid only when a listed trap is proven on-chain at that block (no pool to exit into · the counter-asset pot is under 5% of your size, and the pot is a hard upper bound on what a sale can return · the token’s own trading gate is off), clear otherwise — clear means no provable trap, not “safe”. risk_profile: age, holder concentration, liquidity depth incl. exitLiquidityUsd, oracle availability, transfer limits — as data you weigh, not as a rating. Plus reasons, confidence and an executable quote. (Base-only today.) |
It is a thin client of the public API (https://api.getplexa.com) — it pays a 402 automatically,
signs the USDC authorization locally with your wallet, and never sees your key. The liquidity engine
stays behind the API.
Why
A generic wallet guard answers “can I sign this transaction?”. It can’t answer the economic question an automated trader actually needs: what price will this swap really fill at under my size, and is this token a trap (rug / honeypot / thin liquidity)? Plexa answers both. This package puts those answers one tool-call away inside any MCP-speaking agent.
Install
Nothing to install — point your MCP client at the package via npx. It is fetched and run on demand.
Claude Desktop
Add to claude_desktop_config.json (Settings → Developer → Edit Config):
{
"mcpServers": {
"plexa": {
"command": "npx",
"args": ["-y", "@getplexa/mcp"],
"env": {
"PLEXA_BASE_URL": "https://api.getplexa.com",
"AGENT_WALLET_KEY": "0x",
"CHAIN": "base"
}
}
}
}
Cursor
Add to ~/.cursor/mcp.json (or Settings → MCP → Add) — the same mcpServers block as above.
Restart the client. You should see the plexa_quote and plexa_pretrade_check tools available.
Configuration
安装
npx -y @getplexa/mcp配置
{
"mcpServers": {
"plexa": {
"command": "npx",
"args": ["-y", "@getplexa/mcp"],
"env": {
"PLEXA_BASE_URL": "https://api.getplexa.com",
"AGENT_WALLET_KEY": "0x<your funded wallet private key>",
"CHAIN": "base"
}
}
}
}