> For the complete documentation index, see [llms.txt](https://wldocs.monarchpay.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wldocs.monarchpay.com/monarch-api-calls.md).

# Monarch API Calls

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[Creating an Invoice](/monarch-api-calls/creating-an-invoice.md)
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[Generating Payment Data](/monarch-api-calls/generating-payment-data.md)
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[Check Allowance](/monarch-api-calls/check-allowance.md)
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[Generate Approve Transaction](/monarch-api-calls/generate-approve-transaction.md)
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