Free Document Processing API: 100 Free Calls and Free BYOK with Claix

How much does Claix cost?

Claix gives new users 100 free API calls to test the platform.

After the free trial calls, you can choose between Claix Managed AI, where Claix manages the AI provider and model configuration, or Bring Your Own Key (BYOK), where you connect your own provider API key and pay no additional Claix processing fee.

The important distinction is this: Claix BYOK is free from a Claix platform-processing perspective. AI providers may still charge for their own model usage. Claix does not charge an additional processing fee for BYOK. Customers remain responsible for their AI provider's token usage and provider charges.

If you connect your own OpenAI, Gemini, Claude, Grok, or other supported provider key, Claix does not add an extra charge for processing your documents through BYOK.

Why document processing often becomes expensive

Many document-processing products charge based on number of documents, pages, OCR pages, extracted fields, credits, AI requests, users, workflows, stored documents, or API calls.

This creates a problem for developers. Before launching a workflow, you need to test whether the system understands your invoices, can process supplier contracts, works with scanned PDFs, handles Excel exports, returns JSON clean enough for your database, supports n8n workflows, extracts data from photographed receipts, works with different languages, identifies missing fields, and fits into your product.

But each test can create another bill.

Claix gives you 100 free API calls so you can test the real workflow with real documents before deciding how you want to scale. Then BYOK gives you a path to continue without an additional Claix processing fee.

What does free BYOK mean?

BYOK means Bring Your Own Key. You connect your own API key from an AI provider and select the model you want Claix to use.

Your AI provider account
        ↓
Your API key
        ↓
Your selected model
        ↓
Claix document-processing workflow
        ↓
Structured result

With BYOK, you choose the provider, choose the model, control the provider account, receive provider usage charges directly from that provider, and Claix does not charge an extra BYOK document-processing fee. You can use Claix as the document-processing and structured-output layer.

This is useful if you already have a provider account with OpenAI, Google Gemini, Anthropic Claude, xAI Grok, or another supported provider.

What does Claix still provide when BYOK is free?

BYOK does not mean you are only calling an AI model directly. Claix still provides the document-processing layer around the model.

The AI provider performs the model inference. Claix makes the result usable inside a document workflow.

That means Claix can help you move from asking a model to read a PDF and tell you what it says to extracting exact fields and returning data your workflow can use.

Free document processing for PDFs

PDFs are one of the most common business formats. Teams receive invoices, contracts, purchase orders, reports, quotes, RFPs, forms, legal documents, financial documents, supplier files, customer documents, and scanned PDFs.

Claix can help extract the information you need from these documents and return structured JSON.

Example invoice fields:

invoice_number
supplier_name
invoice_date
due_date
total_amount
currency
purchase_order_number

Example workflow:

PDF invoice
    ↓
Claix extracts invoice details
    ↓
Your workflow checks required fields
    ↓
Compare against purchase order
    ↓
Approve or create a review task

You can use your first 100 calls to test this workflow for free. After that, use BYOK and pay only the token charges from your selected provider.

Free invoice extraction

Invoice processing is one of the clearest use cases for a cheap document-processing API.

A typical manual process looks like this:

Open invoice
    ↓
Read supplier name
    ↓
Find invoice number
    ↓
Copy the total
    ↓
Copy the date
    ↓
Look up purchase order
    ↓
Update spreadsheet or ERP
    ↓
Ask someone to review discrepancies

A Claix workflow can look like this:

Invoice arrives by email
    ↓
Claix extracts structured fields
    ↓
Database or ERP lookup
    ↓
Compare supplier, currency, and total
    ↓
Approve matching documents
    ↓
Send exceptions to finance

Free Excel and CSV processing

Excel and CSV files are often treated as structured data, but in practice they are rarely clean. They can include inconsistent headers, different language labels, abbreviations, empty rows, legacy exports, mixed fields, repeated tables, and supplier-specific formats.

Claix can map spreadsheet data to the fields your workflow expects.

This makes it easier to turn spreadsheet data into consistent records for a CRM, database, sales workflow, finance workflow, agent, internal dashboard, or reporting system.

Free Word document processing

Word documents often contain information that is difficult to use programmatically: contracts, proposals, policies, reports, customer documents, meeting notes, procedures, and HR files.

Claix can help extract key fields from Word and text-based documents, then return them in a defined structure.

For example, a contract workflow may extract:

contract_party
counterparty
start_date
end_date
payment_terms
automatic_renewal
termination_penalty

The first 100 calls let you test whether the extracted output matches your needs. With BYOK, you can keep using the same workflow without a separate Claix processing charge.

Free image and receipt processing

Images are useful for receipt photos, scanned forms, mobile uploads, business cards, identity documents, delivery notes, screenshots, product labels, and documents photographed in poor conditions.

A compatible AI model can interpret the image, while Claix structures the result for your workflow.

Example receipt output:

{
  "merchant_name": "Example Store",
  "purchase_date": "2026-09-15",
  "total_amount": 42.8,
  "currency": "EUR"
}

If the image is unreadable or the required field is missing, your workflow can send it to a review queue instead of treating an uncertain value as correct.

Free HTML, XML, and text extraction

Not every document arrives as a file. You may receive business information through webhooks, email bodies, CRM exports, HTML forms, XML feeds, support tickets, raw text, website pages, or internal tools.

Claix can process text, HTML, and XML as content and return structured fields.

HTML customer request
    ↓
Claix extracts customer name, reference, request type, and date
    ↓
Workflow creates CRM record or support ticket

This is useful for automation builders who need to standardize information before it reaches another system.

Claix pricing compared with common approaches

The main cost advantage of Claix BYOK is not that the model provider becomes free. The advantage is that you do not pay AI provider token cost plus extra Claix per-page cost plus extra Claix per-document cost plus extra Claix BYOK processing cost.

Instead, your cost is your selected provider's usage cost while Claix gives you the document-processing workflow. Claix does not charge an additional processing fee for BYOK. Customers remain responsible for their AI provider's token usage and provider charges.

How to choose the cheapest AI model for document processing

The cheapest model is not always the best model. For simple, clean documents, a smaller or faster model may be enough. For complex scanned documents, long contracts, difficult tables, or high-stakes extraction, a more capable model may be worth the additional provider cost.

Claix helps control costs by encouraging focused schemas and targeted document workflows. Instead of sending every field, every document, and every question into a large prompt, you can request only what the workflow needs.

Free BYOK and token optimization

BYOK makes your provider token usage visible and controllable. Claix helps you keep those costs lower by supporting patterns such as:

• Process the document once.
• Extract only the fields your workflow needs.
• Keep schemas focused.
• Avoid repeatedly uploading the same document.
• Ask targeted follow-up questions instead of sending the full document again.
• Use a fast model for simple extraction.
• Use a more advanced model only when the task needs it.
• Route incomplete documents to a human instead of retrying endlessly.
• Avoid unnecessary long outputs.
• Use structured fields instead of asking a model to explain everything in prose.

A cost-efficient workflow looks like this:

Receive document
    ↓
Extract a small set of required fields
    ↓
Validate the result
    ↓
Use normal application logic for deterministic checks
    ↓
Ask an AI follow-up question only if necessary

This is usually cheaper than placing the entire document inside every agent prompt.

Use Claix with n8n for free

Claix can be used in n8n workflows through API calls.

Gmail Trigger
    ↓
Download PDF attachment
    ↓
Claix PDF extraction
    ↓
Receive JSON
    ↓
Check required fields
    ↓
Look up record in database
    ↓
Create approval task or update system

Other useful n8n workflows include:

• Invoice processing.
• Contract renewal reminders.
• Receipt extraction.
• Customer document intake.
• Spreadsheet normalization.
• Lead extraction.
• CRM updates.
• Supplier-document processing.
• HR document workflows.
• Support ticket enrichment.
• Document-to-database flows.

You can test these workflows with the first 100 free Claix calls. Then, if you want to keep costs low, connect your own provider key through BYOK.

Use Claix with your existing provider account

If your team already uses an AI provider, BYOK lets you keep that provider relationship.

This can simplify procurement and cost control because your AI provider charges remain under your own provider account.

Start with 100 free calls

The easiest way to evaluate Claix is to test it with documents from your real workflow.

Try a supplier invoice, scanned receipt, customer contract, Excel export, Word document, HTML email, XML record, or PDF report.

Use the first 100 free API calls to evaluate extraction quality, structured output, schema design, automation compatibility, workflow speed, cost per task, model selection, and downstream validation.

Then enable BYOK if you want to continue processing documents without an additional Claix processing fee.

Final answer

Claix is a low-cost document-processing API built for real automation workflows.

You get 100 free API calls to test document processing, support for PDF, Excel, CSV, Word, image, HTML, XML, text, and JSON workflows, structured JSON output, schema-based extraction, Document Context and Knowledge Spaces where enabled, automation-ready responses, n8n, Make, Zapier, Supabase, and custom backend compatibility, free BYOK processing where you connect your own AI provider key and pay no additional Claix processing fee, and control over the provider and model you choose.

Try Claix free with 100 API calls. When you are ready to scale, use BYOK and pay only for your own AI provider's token usage—not an extra Claix document-processing fee. Claix does not charge an additional processing fee for BYOK. Customers remain responsible for their AI provider's token usage and provider charges.