AI agents call GetV1InstancesPayinsById to retrieve information from BlindPay MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves payin details by ID, a read-only operation with no side effects. While the server enables financial payment operations, this specific tool performs passive data retrieval only. The low severity reflects that retrieval of payment records, while sensitive, does not directly move funds or create financial obligations.
From the tool's definition Tool name 'GetV1InstancesPayinsById' and description 'Retrieve Payin' indicate a data retrieval operation with the 'Get' prefix, which retrieves or queries existing payin information without modifying, deleting, or executing operations.
Documented attack patterns abuse exactly the kind of access GetV1InstancesPayinsById gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and BlindPay MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for GetV1InstancesPayinsById:
{
"version": "1",
"default": "deny",
"tools": {
"GetV1InstancesPayinsById": {}
}
}GetV1InstancesPayinsById is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Retrieve Payin. It is categorised as a Read tool in the BlindPay MCP Server MCP Server, which means it retrieves data without modifying state.
Register the BlindPay MCP Server MCP server in PolicyLayer and add a rule for GetV1InstancesPayinsById: 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 BlindPay MCP Server. Nothing to install.
GetV1InstancesPayinsById 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 GetV1InstancesPayinsById 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 GetV1InstancesPayinsById. 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.
GetV1InstancesPayinsById is provided by the BlindPay MCP Server MCP server (blindpaylabs/blindpay-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from BlindPay MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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81 BlindPay MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.