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FlexYield — blockchain RPC gateway

Official registry Finance and payments

RPC gateway for agents: six mainnets, measured failover, a key without signup, pay per call in USDC.

Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http flexyield-blockchain-rpc-gateway 'https://flexyield.io/mcp' --header 'Authorization: <Bearer <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>'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "flexyield-blockchain-rpc-gateway": {
            "type": "http",
            "url": "https://flexyield.io/mcp",
            "headers": {
                "Authorization": "<Bearer <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>"
            }
        }
    }
}

Frequently asked questions

What is FlexYield — blockchain RPC gateway?

RPC gateway for agents: six mainnets, measured failover, a key without signup, pay per call in USDC.

How do I install FlexYield — blockchain RPC gateway?

It runs as a remote server. In Claude Code: claude mcp add --transport http flexyield-blockchain-rpc-gateway 'https://flexyield.io/mcp' --header 'Authorization: <Bearer <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>'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does FlexYield — blockchain RPC gateway need an API key?

Yes. It expects Authorization, which you set in its configuration.

Who maintains FlexYield — blockchain RPC gateway?

It is published by io.flexyield. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.