// MCP TOOL REFERENCE

create_client_token

Mint a Braintree client token via createClientToken for client-side tokenization (Drop-in, Hosted Fields, mobile SDKs). Pass a customerId to scope the token to a customer for vault-aware flows.

ServerMcp Ap2
CategoryExecute

How to control create_client_token ↓

WHAT IT DOES

What create_client_token does on Mcp Ap2

AI agents invoke create_client_token to trigger actions in Mcp Ap2. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

THE RISK

High Risk

Why create_client_token needs a policy

This tool executes an operation on the Braintree payment gateway to generate an authentication token. While it doesn't directly move money, it creates a credential used to initiate payment flows and vault-aware operations, making it an Execute-level action with medium severity — misuse could enable unauthorized payment tokenization or vault access.

From the tool's definition Mint a Braintree client token via createClientToken for client-side tokenization

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

POLICY

How to control create_client_token

PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Ap2, and nothing reaches the server without passing your rules. This is the rule we recommend for create_client_token:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_client_token": {
      "limits": [
        {
          "counter": "create_client_token_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

create_client_token stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register Mcp Ap2 — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

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EXPLORE

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All 1300 Mcp Ap2 tools →

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Go deeper

High-risk tools in Mcp Ap2 → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-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.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about create_client_token

What does the create_client_token tool do? +

Mint a Braintree client token via createClientToken for client-side tokenization (Drop-in, Hosted Fields, mobile SDKs). Pass a customerId to scope the token to a customer for vault-aware flows. It is categorised as a Execute tool in the Mcp Ap2 MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on create_client_token? +

Register the Mcp Ap2 MCP server in PolicyLayer and add a rule for create_client_token: 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 Mcp Ap2. Nothing to install.

What risk level is create_client_token? +

create_client_token is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit create_client_token? +

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

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

create_client_token is provided by the Mcp Ap2 MCP server (@codespar/mcp-ap2). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Mcp Ap2 tool call.

Start from Mcp Ap2, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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1300 Mcp Ap2 tools catalogued and risk-classified — across an index of 43,000+ MCP servers.