Create (onboard) a new receiver under an integrator account. The receiver can then collect Khipu payments. Only available to integrator-level API keys.
AI agents use create_receiver to create or update resources in Mcp Ap2 — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Ap2 environment.
This tool creates a new entity (a payment receiver) under an integrator account. It is a Write operation — it creates a new record/account reversibly. While it enables future payment collection, the act of creating the receiver itself does not move money or commit financial obligations directly. Severity is medium because onboarding a rogue receiver could facilitate unauthorized payment collection.
From the tool's definition Create (onboard) a new receiver under an integrator account. The receiver can then collect Khipu payments.
Documented attack patterns abuse exactly the kind of access create_receiver gives an agent:
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_receiver:
{
"version": "1",
"default": "deny",
"tools": {
"create_receiver": {
"limits": [
{
"counter": "create_receiver_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_receiver stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Create (onboard) a new receiver under an integrator account. The receiver can then collect Khipu payments. Only available to integrator-level API keys. It is categorised as a Write tool in the Mcp Ap2 MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Mcp Ap2 MCP server in PolicyLayer and add a rule for create_receiver: 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.
create_receiver is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the create_receiver 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 create_receiver. 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.
create_receiver 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.
Start from Mcp Ap2, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
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