buy_credit

THE RISK

Critical Risk

Why buy_credit needs a policy

This tool explicitly buys credit for an account, which involves spending money or blockchain tokens. This is a financial commitment that cannot be trivially reversed, making it Financial category with high severity since an AI agent could spend funds without user intent.

From the tool's definition 'Buy credit for Recall account' — purchasing credit constitutes a financial transaction committing real monetary value

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

POLICY

How to control buy_credit

PolicyLayer is an MCP gateway — it sits between your AI agents and Recall MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for buy_credit:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "buy_credit": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

Any call to buy_credit is blocked until a human approves it. The rest of the server keeps working.

Create a free account and register Recall 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.

GATE THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Recall MCP Server tools

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All 9 Recall MCP Server tools →

Financial tools on other servers

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Go deeper

Critical-risk tools in Recall MCP Server → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Human-in-the-loop → When a tool call should wait for a person — and when policy can decide alone.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
How to Add Spending Controls to Any MCP Agent →
Rate Limiting MCP Tool Calls: A Practical Guide →

FAQ

Questions about buy_credit

What does the buy_credit tool do? +

Buy credit for Recall account. It is categorised as a Financial tool in the Recall MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on buy_credit? +

Register the Recall MCP Server MCP server in PolicyLayer and add a rule for buy_credit: 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 Recall MCP Server. Nothing to install.

What risk level is buy_credit? +

buy_credit is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit buy_credit? +

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

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

buy_credit is provided by the Recall MCP Server MCP server (recallnet/recall-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Recall MCP Server tool call.

Start from Recall 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 →