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.
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 bnbchain-mcp):

"url": "http://localhost:3001/sse"

with the same

env

Restart or reload the MCP client after changing config so the server starts.

2. Credentials and environment

RPC: Built-in for default chains.
PRIVATE_KEY: Set in the server’s
```
env
```
when state-changing tools are needed; leave empty for read-only. Do not commit or echo keys.

3. Agent registration (ERC-8004)

Register the agent on-chain with the MCP tool register_erc8004_agent
(see references/erc8004-tools-reference.md).
Owners can then check registration on 8004scan (mainnet) or 8004scan (testnet).

4. Quick reference — tools and prompts

Network parameter

Most EVM tools accept network
(optional): chain name or ID, e.g.

bsc

opbnb

ethereum

base

. Default is

bsc

. Use get_supported_networks
to list supported networks.

Tool categories

Category	Examples	Needs PRIVATE_KEY?
Blocks	`get_latest_block` , `get_block_by_number` , `get_block_by_hash`	No
Transactions	`get_transaction` , `get_transaction_receipt` , `estimate_gas`	No (estimate only)
Network	`get_chain_info` , `get_supported_networks`	No
Wallet / balance	`get_native_balance` , `get_erc20_balance` , `get_address_from_private_key`	Balance: optional address or privateKey
Transfers / writes	`transfer_native_token` , `transfer_erc20` , `transfer_nft` , `transfer_erc1155` , `approve_token_spending` , `write_contract`	Yes
Contracts	`read_contract` , `is_contract`	No for read
Tokens / NFT	`get_erc20_token_info` , `get_nft_info` , `get_erc1155_token_metadata` , `check_nft_ownership` , `get_nft_balance` , `get_erc1155_balance`	No for read
ERC-8004	`register_erc8004_agent` , `set_erc8004_agent_uri` , `get_erc8004_agent` , `get_erc8004_agent_wallet`	Register/set_uri: Yes
Greenfield	`gnfd_*` bucket/object/payment tools	Writes: Yes

Prompts (MCP prompts)

Use the MCP prompt names when the user wants analysis or guidance:

analyze_block — Analyze a block and its contents
analyze_transaction — Analyze a specific transaction
analyze_address — Analyze an EVM address
interact_with_contract — Guidance on interacting with a smart contract
explain_evm_concept — Explain an EVM concept
compare_networks — Compare EVM-compatible networks
analyze_token — Analyze an ERC20 or NFT token
how_to_register_mcp_as_erc8004_agent — Guidance on registering MCP as ERC-8004 agent

5. Reference files (per-tool usage)

For parameter names, examples, and detailed usage of each tool, use:

Reference	Content
references/evm-tools-reference.md	Blocks, transactions, network, wallet, contracts, tokens, NFT — all EVM tools
references/erc8004-tools-reference.md	register_erc8004_agent, set_erc8004_agent_uri, get_erc8004_agent, get_erc8004_agent_wallet
references/greenfield-tools-reference.md	Buckets, objects, folders, payment accounts — all Greenfield tools
references/prompts-reference.md	All MCP prompts and when to use them

6. Safety and best practices

Confirm before sending transactions: For
```
transfer_*
```
,
```
write_contract
```
, or
```
approve_token_spending
```
, confirm recipient, amount, and network before calling the tool.
Prefer testnet when the network is unspecified for writes or agent registration.
Private keys: Only in MCP server
```
env
```
; never in chat or logs.
ERC-8004 agentURI: JSON metadata per the Agent Metadata Profile (name, description, image, services e.g. MCP endpoint).

Documentation links

BNB Chain MCP repo: https://github.com/bnb-chain/bnbchain-mcp
npm:
```
npx @bnb-chain/mcp@latest
```
ERC-8004 (Identity Registry); Agent Metadata Profile for agentURI format.

bnbchain-mcp

NPX Install

Tags

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