I Built an Invoice Parser API in One Day and Listed it on RapidAPI (Day 1 of 21)

I'm a self-taught developer from South Africa, currently studying for my Bachelor of Accounting. Today I started a challenge: build and publish a new API every day for 21 days straight. Day 1 is done. Here's exactly what I built, how it works, and how you can use it. The Problem: Every accounting app, expense tracker, and bookkeeping tool has the same pain point, invoices come in as PDFs, images, or plain text, and somebody has to pull the structured data out of them. Vendor name. Invoice number. Line items. Tax. Total. Due date. It's repetitive, error-prone work. And every developer building a finance tool ends up writing the same messy regex logic to solve it. So I built an API that does it for them. What I Built: The Invoice & Receipt Parser API — send it raw invoice text, get back clean structured JSON. Input: { "text": "Acme Corp\nInvoice No: INV-2024-0042\nDate: 15/03/2024\nDue: 15/04/2024\n\nWeb Design Services 2 $1500.00 $3000.00\nSEO Optimization 1 $800.00 $800.00\n\nSubto