MCP server for the Spraay x402 Gateway — 148 pay-per-call tools for AI inference, batch payments, DeFi, research & compute on Base, with Solana, Ethereum, XRP & Stellar rails. USDC via x402, no API keys.
Setup
Choose your client, copy the config, then fill in any required environment variables.
claude mcp add spraay-x402 --env X402_WALLET_PRIVATE_KEY='<X402_WALLET_PRIVATE_KEY>' -- npx -y spraay-x402-mcp~/.codex/config.toml
[mcp_servers.spraay-x402]
command = "npx"
args = ["-y", "spraay-x402-mcp"]
env = { X402_WALLET_PRIVATE_KEY = "<X402_WALLET_PRIVATE_KEY>" }
# codex mcp add spraay-x402 --env X402_WALLET_PRIVATE_KEY='<X402_WALLET_PRIVATE_KEY>' -- npx -y spraay-x402-mcp~/.cursor/mcp.json
{
"mcpServers": {
"spraay-x402": {
"command": "npx",
"args": [
"-y",
"spraay-x402-mcp"
],
"env": {
"X402_WALLET_PRIVATE_KEY": "<X402_WALLET_PRIVATE_KEY>"
}
}
}
}.vscode/mcp.json
{
"servers": {
"spraay-x402": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"spraay-x402-mcp"
],
"env": {
"X402_WALLET_PRIVATE_KEY": "<X402_WALLET_PRIVATE_KEY>"
}
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"spraay-x402": {
"command": "npx",
"args": [
"-y",
"spraay-x402-mcp"
],
"env": {
"X402_WALLET_PRIVATE_KEY": "<X402_WALLET_PRIVATE_KEY>"
}
}
}
}claude_desktop_config.json
{
"mcpServers": {
"spraay-x402": {
"command": "npx",
"args": [
"-y",
"spraay-x402-mcp"
],
"env": {
"X402_WALLET_PRIVATE_KEY": "<X402_WALLET_PRIVATE_KEY>"
}
}
}
}.trae/mcp.json
{
"mcpServers": {
"spraay-x402": {
"command": "npx",
"args": [
"-y",
"spraay-x402-mcp"
],
"env": {
"X402_WALLET_PRIVATE_KEY": "<X402_WALLET_PRIVATE_KEY>"
}
}
}
}Environment variables
X402_WALLET_PRIVATE_KEY
Replace the placeholders with your own credentials and keep them out of version control.