Get the gateway client credential to initialize your payment integration and produce a paymentMethodNonce. Use the returned value in your hosted payment UI; then pass the resulting token as paymentMethodNonce to create_customer_payment_method. Gateway-agnostic: no gateway-specific concepts in MCP...
AI agents call get_client_token to retrieve information from Rebillia MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read operation - it fetches authentication credentials from a payment gateway without creating, modifying, deleting, or executing operations. While it deals with payment infrastructure, it does not move money, charge accounts, or commit financial obligations. The credential it returns is a prerequisite for other operations but the tool itself is purely retrieving data.
From the tool's definition Tool retrieves and returns a client credential/token for payment gateway initialization. The description states 'Get the gateway client credential' and 'Use the returned value' - indicating data retrieval with no side effects.
Attacks that exploit this kind of access
Get the gateway client credential to initialize your payment integration and produce a paymentMethodNonce. Use the returned value in your hosted payment UI; then pass the resulting token as paymentMethodNonce to create_customer_payment_method. Gateway-agnostic: no gateway-specific concepts in MCP. Optional customerId scopes the credential to a customer (e.g. for vault). Required for PayFabric; optional for others. Requires company API token (X-AUTH-TOKEN). It is categorised as a Read tool in the Rebillia MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Rebillia MCP Server MCP server in PolicyLayer and add a rule for get_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 Rebillia MCP Server. Nothing to install.
get_client_token is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_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.
Set action: deny in the PolicyLayer policy for get_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.
get_client_token is provided by the Rebillia MCP Server MCP server (rhinosaas/rebillia-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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