Generate FastBill XML API requests and parse responses for invoice operations.
npx skills add https://github.com/HybridAIOne/hybridclaw --skill fastbill
Please help me install this Agent Skill. Skill: fastbill Source: https://github.com/HybridAIOne/hybridclaw/tree/main/skills/fastbill Command: npx skills add https://github.com/HybridAIOne/hybridclaw --skill fastbill
This Skill eliminates the need to manually assemble and validate FastBill invoice operations, letting you reliably query and update invoices, customers, payments, reminders, and e-invoice exports using structured inputs.
Ask the AI to create an invoice draft from tracked time for customer 123 by calling invoice.create with operator-grant enabled.
High-intent search queries and answers about installing and using this skill.
FastBill invoice automation works by serializing JSON inputs into valid XML API requests for the invoice.create service. You must provide operator-grant permission for mutating calls, and can use dry-run mode to safely validate the XML payload before executing the actual write operation.
Yes, marking FastBill payments as received and sending reminders are supported through the invoice.setpaid and invoice.sendbyemail XML API services. These controlled write operations require operator-grant authorization to execute, ensuring mutating actions are explicitly permitted.
FastBill API authentication is handled securely by injecting Basic auth credentials through the FASTBILL_BASIC_AUTH secret route within the gateway. This gateway-safe pattern means your XML API requests are authenticated automatically without exposing credentials directly in the request payload.
Exporting e-invoice documents such as XRechnung and ZUGFeRD is handled by generating specific XML API requests for e-invoice related services. The Skill parses the returned FastBill XML responses, converting them into structured, usable output for your accounting automation workflows.
FastBill API integration fully supports read-only lookup tasks for querying invoices, customers, and payments. These queries use gateway-safe XML request patterns to retrieve data and parse the XML responses back into structured output without requiring operator-grant permissions.
The primary limitation for accounting automation is that mutating XML API calls are restricted unless operator-grant is provided or a dry-run is used. Additionally, all requests must conform to a service allowlist, meaning only explicitly permitted FastBill services can be executed.
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