buy_credits

Out of credits? Top up with a credit PACK. Call with no argument to list the available packs (id · credits · price). If the account has a saved card and you have billing-admin rights, calling with

SERVERHermoso SOURCEhttps://app.hermoso.ai/mcp

Critical RISK CLASS

Category Financial

Parameters 00 required

Recommended Approval-gatedsee the rule below

Registry record Grade D, identity unverified Pull the record →

This record as markdown: /tools/hermoso/buy-credits.md

WHAT IT DOES

What buy_credits does on Hermoso

AI agents use buy_credits to commit financial operations through Hermoso, usually the final step of a payment, billing, or trading workflow. A call moves real money.

RISK

Why buy_credits is rated Critical

This tool directly initiates a financial transaction by charging a saved payment card to purchase credit packs. It moves real money and commits financial obligations, placing it firmly in the Financial category. Misuse by an AI agent could result in unauthorized charges, hence critical severity.

From the tool's definition 'Top up with a credit PACK' and 'calling with [saved card] and billing-admin rights' implies charging a payment method to purchase credits

Risk signalsAdmin/system-level operation

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs buy_credits safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Hermoso, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For buy_credits, this is the rule to start with:

buy_credits Approval-gated

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

View as policy code

policy.json

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

GATE THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Hermoso, apply this rule, and every buy_credits call is checked against it from then on.

FAQ

Questions about buy_credits

What does the buy_credits tool do? +

Out of credits? Top up with a credit PACK. Call with no argument to list the available packs (id · credits · price). If the account has a saved card and you have billing-admin rights, calling with. It is categorised as a Financial tool in the Hermoso MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on buy_credits? +

Register the Hermoso MCP server in PolicyLayer and add a rule for buy_credits: 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 Hermoso. Nothing to install.

What risk level is buy_credits? +

buy_credits 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_credits? +

Yes. Add a rate_limit block to the buy_credits 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_credits completely? +

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

buy_credits is provided by the Hermoso MCP server (https://app.hermoso.ai/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Hermoso, and thousands of servers like it.

This server

All 896 Hermoso tools → Critical-risk tools on this server →

Across the catalogue

buy_now on Ebay → All critical-risk MCP tools → The MCP Attack Database →

Guides

Govern MCP payment tools →Human-in-the-loop →Tool call approval →