FlexYield MCP MCP server

An official MCP server provided by FlexYield that allows AI agents to interact with blockchain RPC endpoints across six mainnets. It supports agent-native tools for retrieving API keys, binding keys to wallets, and accessing blockchain data with automatic failover and pay-per-call pricing in USDC.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by FlexYield

MCP endpoint (Streamable HTTP)

https://flexyield.io/mcp

Vendor documentation

What you can do with it

Retrieve a public API key with no signup for immediate use
Bind an API key to a wallet for persistent access
Relay JSON-RPC requests to multiple blockchain mainnets
Access blockchain data with automatic upstream failover

Tools advertised by the last live check:

get_key
bind_key_start
bind_key_complete
claim_agent_start
claim_agent_complete
create_api_key
configure_key
revoke_api_key
list_api_keys
get_billing_status
configure_services
update_account
join_enterprise_wishlist
join_waitlist
list_plans
get_usage
get_statement
manage_tickets
manage_feedback
get_balances
get_history
get_prices
get_tx_status
resolve_ens
get_abi
decode_calldata
convert_evm
verify_signature
what_can_i_do
get_quote
explain_error
recommend
migrate
buy_pack
rpc_call

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http flexyield-mcp https://flexyield.io/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add flexyield-mcp --url https://flexyield.io/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable flexyield-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "flexyield-mcp": {
      "url": "https://flexyield.io/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "flexyield-mcp": {
      "type": "streamableHttp",
      "url": "https://flexyield.io/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start flexyield-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "flexyield-mcp": {
      "type": "http",
      "url": "https://flexyield.io/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http flexyield-mcp https://flexyield.io/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "flexyield-mcp": {
      "url": "https://flexyield.io/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "flexyield-mcp": {
      "serverUrl": "https://flexyield.io/mcp"
    }
  }
}

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