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RPC gateway for agents: six mainnets, measured failover, a key without signup, pay per call in USDC.
npx @getmcp/cli add io.flexyield/gatewayRequires Node.js 18+. Community-contributed server. Review source before installing.
AuthorizationBearer <FlexYield API key> — get one without signup: POST https://flexyield.io/keys (or the get_key tool); free tier at https://flexyield.io/registration/new
Config file: ~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"io.flexyield/gateway": {
"url": "https://flexyield.io/mcp",
"transport": "streamable-http",
"headers": {
"Authorization": ""
}
}
}
}