generate_invoice

SERVERInvoicehub SOURCEhttps://api.invoicehub.dev/mcp

Medium RISK CLASS

Category Write

Parameters 86 required

Recommended Rate-limitedsee the rule below

Registry record Grade C, identity unverified Pull the record →

This record as markdown: /tools/dev-invoicehub-invoicehub/generate-invoice.md

WHAT IT DOES

What generate_invoice does on Invoicehub

AI agents use generate_invoice to create or update resources in Invoicehub, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Invoicehub environment.

Parameter	Type	Required	Description
`buyer`	object	Yes
`lines`	array	Yes
`seller`	object	Yes
`dueDate`	string	—
`payment`	object	—
`currency`	string	Yes	ISO 4217, e.g. EUR.
`issueDate`	string	Yes	ISO date, e.g. 2026-06-19.
`invoiceNumber`	string	Yes

Parameters from the server's own tool schema.

RISK

Why generate_invoice is rated Medium

An AI agent can call generate_invoice faster than any human can review: one bad instruction and it creates or modifies resources in Invoicehub by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs generate_invoice safely

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

generate_invoice Rate-limited

generate_invoice 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "generate_invoice": {
      "limits": [
        {
          "counter": "generate_invoice_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Invoicehub, apply this rule, and every generate_invoice call is checked against it from then on.

FAQ

Questions about generate_invoice

What does the generate_invoice tool do? +

Generate an EN 16931-conformant UBL 2.1 invoice from structured fields. The result is self-validated before being returned. Provide seller, buyer, and at least one line; for standard-rated (category "S") lines include a vatRate and the seller vatId. It is categorised as a Write tool in the Invoicehub MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does generate_invoice accept? +

generate_invoice accepts 8 parameters: buyer, lines, seller, dueDate, payment, currency, issueDate, invoiceNumber. Required: buyer, lines, seller, currency, issueDate, invoiceNumber. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on generate_invoice? +

Register the Invoicehub MCP server in PolicyLayer and add a rule for generate_invoice: 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 Invoicehub. Nothing to install.

What risk level is generate_invoice? +

generate_invoice is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit generate_invoice? +

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

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

generate_invoice is provided by the Invoicehub MCP server (https://api.invoicehub.dev/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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