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Invoice Q&A API for developers

Ask questions and get AI-powered natural language answers from invoices, expenses, and bank statements. Perfect for financial document understanding, summarization, and conversational Q&A.

  • Natural Language Responses – Get human-readable answers in markdown format, perfect for conversational AI applications
  • Multiple Format Support – Ask questions about PDFs, Word documents (DOCX), and image files (PNG, JPG) with consistent accuracy
  • Simple Integration – Clean REST API and TypeScript SDK for easy integration into any application
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Trusted by

Research Kick

Research Kick

ChatAcademia

ChatAcademia

ReadBack

ReadBack

RabbitHoles

RabbitHoles

Easy to use APIs

Use our simple APIs directly or our TypeScript SDK with just a few lines of code.

Invoice Ask

API Docs
import { PDFVector } from "pdfvector";

const client = new PDFVector({
  apiKey: "pdfvector_xxxxxxx"
});

// From URL
const results = await client.invoiceAsk({
  url: "https://example.com/invoice.pdf",
  prompt: "What is the total amount due and when is the payment due?"
});

// From file
import { readFile } from "fs/promises";
const results = await client.invoiceAsk({
  data: await readFile("invoice.pdf"),
  contentType: "application/pdf",
  prompt: "What is the total amount due and when is the payment due?"
});

What people are saying

See how PDF Vector is helping teams improve their document processing workflows

Abdo El-Mobayad

“Can't recommend PDF Vector enough! It boosts your AI workflow accuracy to 100% while dropping your costs! Especially if you're a T4 Org in the $150/m spend range!”

— Abdo El-Mobayad

Trent

“Gotta give a shoutout to PDF Vector team for helping me set up PDF Vector for a project. They even delivered on a feature request before I purchased. Incredible customer service. 👏”

— Trent

Praneeth Pike

“Been implementing RAG and changing a lot of things under the hood for @rabbitholesai, came across PDF Vector and it was a huge time saver. I got a document parsing solution for the rag pipeline within minutes! one less thing to worry about”

— Praneeth Pike

AI-Powered Invoice Q&A

Transform your invoices and financial documents into intelligent conversational interfaces. Our AI understands financial context, line items, and calculations to provide accurate answers.

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Financial Document Understanding

State-of-the-art language models analyze your entire invoice or financial document to provide contextual, accurate answers to complex financial questions.

Natural Language Responses

Get human-readable answers in clean markdown format. Perfect for chatbots, support systems, and conversational interfaces for financial data.

Full Financial Context

Our AI reads the entire financial document, understanding relationships between line items, totals, taxes, and payment terms to provide comprehensive answers.

Intelligent Financial Analysis

Beyond simple Q&A - get summaries, expense breakdowns, payment details, and insights from your financial documents automatically.

Example Output

Real examples of questions and AI-generated answers from invoices and financial documents

Original Document

Invoice

Output

AI-generated answer to your question

Question

What is the total amount due and when is the payment due?

Answer

Total due: $123,155.08
Payment due date: 30/09/2025 (30 September 2025)

One subscription, all APIs

Start for free, then scale as you grow. No hidden fees.

Save one month

Free

$0

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Perfect for testing and small projects

  • Access to all APIs
  • 100 credits
Subscribe to Free

Basic

$23/month

$275 billed annually

Great for personal projects and small businesses

  • Access to all APIs
  • 3,000 credits
Subscribe to Basic
Most Popular

Pro

$89/month

$1067 billed annually

Most popular plan for growing businesses

  • Access to all APIs
  • 100,000 credits
Subscribe to Pro

Enterprise

$457/month

$5489 billed annually

For large-scale applications and enterprises

  • Access to all APIs
  • 500,000 credits
Subscribe to Enterprise

Ready to Make Your Invoices Conversational?

Transform your invoices and financial documents into intelligent, conversational knowledge sources. Start asking questions and getting natural language answers in minutes.

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No setup fees • Integrate in minutes • Cancel anytime

Everything you need for document processing

Transform any document into clean text. Extract structured data from PDFs, Word files, Excel spreadsheets, and images with precision and speed. Also search 5M+ academic papers and fetch papers by paper IDs.

Document

Parse PDF

Convert PDF document to clean, structured markdown.

Parse Word

Convert Word document to clean, structured markdown.

Parse Image

Convert image file to clean, structured markdown.

Parse Excel

Convert Excel spreadsheet to clean, structured markdown.

Ask PDF

Ask questions about PDF document and get answers in markdown format.

Ask Word

Ask questions about Word document and get answers in markdown format.

Ask Image

Ask questions about image and get answers in markdown format.

Ask Excel

Ask questions about Excel spreadsheet and get answers in markdown format.

Extract PDF

Turn PDF document into structured data with custom fields.

Extract Word

Turn Word document into structured data with custom fields.

Extract Image

Turn image into structured data with custom fields.

Extract Excel

Turn Excel spreadsheet into structured data with custom fields.

List Images

List images from PDF and Word document.

Invoice

Parse Invoice

Convert invoice document to clean, structured markdown.

Ask Invoice

Ask questions about invoice document and get answers in markdown format.

Extract Invoice

Turn invoice document into structured data with custom fields.

Bank Statement

Convert Bank Statement

Convert bank statement document to Excel, CSV or Markdown format

Academic

Search Academic Papers

Search across PubMed, Semantic Scholar, ArXiv, Google Scholar, ERIC, Europe PMC, and OpenAlex databases

Fetch Academic Papers

Fetch academic papers using DOI or any IDs of any academic database.

Get started for free today

No setup fees • Integrate in minutes • Cancel anytime

Frequently asked questions