get_storage_at | PolicyLayer

WHAT IT DOES

What get_storage_at does on Sperax Ecosystem Crypto & DeFI MCP Server

AI agents call get_storage_at to retrieve information from Sperax Ecosystem Crypto & DeFI MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why get_storage_at needs a policy

This tool retrieves contract state data from blockchain storage without side effects. It is purely informational and does not execute code, modify state, delete data, or move funds. The ability to read private variables is a read-only inspection capability. Severity is low because misuse would only expose data already on-chain, not cause irreversible damage or financial loss.

From the tool's definition Tool name 'get_storage_at' and description explicitly state 'Read raw storage' and 'reading private variables or understanding contract state' — a data retrieval operation with no modification, deletion, or execution capability.

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

POLICY

How to control get_storage_at

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 get_storage_at:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_storage_at": {}
  }
}

get_storage_at is read-only, so it stays allowed — but 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.

CAP THIS TOOL →

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_storage_at

What does the get_storage_at tool do? +

Read raw storage from a contract at a specific slot. Useful for reading private variables or understanding contract state. It is categorised as a Read tool in the Sperax Ecosystem Crypto & DeFI MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_storage_at? +

Register the Sperax Ecosystem Crypto & DeFI MCP Server MCP server in PolicyLayer and add a rule for get_storage_at: 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 get_storage_at? +

get_storage_at is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_storage_at? +

Yes. Add a rate_limit block to the get_storage_at 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 get_storage_at completely? +

Set action: deny in the PolicyLayer policy for get_storage_at. 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 get_storage_at? +

get_storage_at 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.

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1318 Sperax Ecosystem Crypto & DeFI MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.