bnbchain-mcp

# BNB Chain MCP Skill How to connect to the BNB Chain MCP server and use its tools: blocks, transactions, contracts, tokens, NFTs, wallet, ERC-8004 agents, and Greenfield. Use this skill when working with BNB Chain / opBNB / EVM or Greenfield via MCP. --- ## Connection and credentials - **Run the server:** `npx @bnb-chain/mcp@latest` (fetches from npm at runtime). Source: [github.com/bnb-chain/bnbchain-mcp](https://github.com/bnb-chain/bnbchain-mcp). - **RPC:** Default chains use built-in RPC; no config unless self-hosting or custom RPC. - **PRIVATE_KEY:** Omit or leave empty for read-only (blocks, balances, contract reads). Set in the MCP server `env` for state-changing tools (transfers, `write_contract`, `approve_token_spending`, ERC-8004 register/set_uri, Greenfield writes). Never log or expose private keys. - **Read-only vs state-changing:** Block/balance/contract-read tools work without a key; transfers and writes require `PRIVATE_KEY` in the server environment. --- ## 1. MCP server config Add the `bnbchain-mcp` server to the MCP client config (e.g. Cursor MCP settings, Claude Desktop `claude_desktop_config.json`). **Default (stdio):** ```json { "mcpServers": { "bnbchain-mcp": { "command": "npx", "args": ["-y", "@bnb-chain/mcp@latest"], "env": { "PRIVATE_KEY": "" } } } } ``` **SSE mode:** `"args": ["-y", "@bnb-chain/mcp@latest", "--sse"]` (and client SSE URL if required). **Local dev server** (e.g. `bun dev:sse` in bn...