transfer_erc1155

THE RISK

Medium Risk

Why transfer_erc1155 needs a policy

This tool moves ERC1155 tokens from one address to another. While token transfers are technically reversible (the recipient could send them back), the act of transferring assets is a Write operation with high severity because an AI agent could misuse it to exfiltrate valuable tokens (fungible or NFT) to an unauthorized address.

From the tool's definition Transfer ERC1155 tokens to another address

Documented attack patterns abuse exactly the kind of access transfer_erc1155 gives an agent:

POLICY

How to control transfer_erc1155

PolicyLayer is an MCP gateway — it sits between your AI agents and Sperax Ecosystem Crypto & DeFI MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for transfer_erc1155:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "transfer_erc1155": {
      "limits": [
        {
          "counter": "transfer_erc1155_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

transfer_erc1155 stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register Sperax Ecosystem Crypto & DeFI MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about transfer_erc1155

What does the transfer_erc1155 tool do? +

Transfer ERC1155 tokens to another address. ERC1155 is a multi-token standard that can represent both fungible and non-fungible tokens in a single contract. It is categorised as a Write tool in the Sperax Ecosystem Crypto & DeFI MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on transfer_erc1155? +

Register the Sperax Ecosystem Crypto & DeFI MCP Server MCP server in PolicyLayer and add a rule for transfer_erc1155: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Sperax Ecosystem Crypto & DeFI MCP Server. Nothing to install.

What risk level is transfer_erc1155? +

transfer_erc1155 is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit transfer_erc1155? +

Yes. Add a rate_limit block to the transfer_erc1155 rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block transfer_erc1155 completely? +

Set action: deny in the PolicyLayer policy for transfer_erc1155. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides transfer_erc1155? +

transfer_erc1155 is provided by the Sperax Ecosystem Crypto & DeFI MCP Server MCP server (sperax/sperax-crypto-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Sperax Ecosystem Crypto & DeFI MCP Server tool call.

Start from Sperax Ecosystem Crypto & DeFI MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →