cancel_subscription

Cancel a recurring payment

SERVERMIDAS Protocol SOURCEhttps://mcp.midasprotocol.org/mcp

Critical RISK CLASS

Category Financial

Parameters 11 required

Recommended Approval-gatedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-bbrainfrance-midas-protocol/cancel-subscription.md

WHAT IT DOES

What cancel_subscription does on MIDAS Protocol

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

Parameter	Type	Required	Description
`subscriptionId`	string	Yes

Parameters from the server's own tool schema.

RISK

Why cancel_subscription is rated Critical

Cancelling a recurring payment is a financial operation that terminates an ongoing financial obligation or service agreement. This is irreversible in practical terms (the subscription/agreement is terminated) and has direct financial consequences for both parties involved. Within the context of a financial infrastructure platform for AI agents, misuse could disrupt services or financial arrangements.

From the tool's definition cancel_subscription — 'Cancel a recurring payment'

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs cancel_subscription safely

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

cancel_subscription Approval-gated

Any call to cancel_subscription 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": {
    "cancel_subscription": {
      "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 MIDAS Protocol, apply this rule, and every cancel_subscription call is checked against it from then on.

FAQ

Questions about cancel_subscription

What does the cancel_subscription tool do? +

Cancel a recurring payment. It is categorised as a Financial tool in the MIDAS Protocol MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

What parameters does cancel_subscription accept? +

cancel_subscription accepts 1 parameter: subscriptionId. Required: subscriptionId. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on cancel_subscription? +

Register the MIDAS Protocol MCP server in PolicyLayer and add a rule for cancel_subscription: 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 MIDAS Protocol. Nothing to install.

What risk level is cancel_subscription? +

cancel_subscription 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 cancel_subscription? +

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

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

cancel_subscription is provided by the MIDAS Protocol MCP server (https://mcp.midasprotocol.org/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on MIDAS Protocol, and thousands of servers like it.

This server

All 44 MIDAS Protocol tools → Critical-risk tools on this server →

Across the catalogue

All critical-risk MCP tools → The MCP Attack Database →

Guides

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