Back to blog
Engineering · Document Processing

AI Data Processing API for Developers

Claix is an AI data processing API built for developers. Turn PDFs, Excel, Word files, images, HTML and XML into structured JSON for apps and workflows.

Claix gives developers a focused way to handle document inputs that are normally difficult to connect to software.

Business document
    ↓
Claix API
    ↓
Structured JSON
    ↓
Your backend, database, CRM, ERP, or workflow

The goal is not to replace your application logic. The goal is to make document data usable inside it.

Who is Claix built for?

Claix is built for technical teams and builders who need document processing inside a product or workflow.

Best fitLess suitable fit
Backend developersUsers looking for a consumer document chat app
SaaS product teamsOne-off casual PDF summaries
Automation buildersManual document editing without a workflow
n8n, Make, and Zapier usersUsers with no need for structured output
AI agent developersPeople who only need a basic OCR viewer
CRM and ERP integratorsUsers expecting a full document-management system
Internal-tools teamsNon-technical users who do not work with APIs or automations

Claix is developer-first. That means the product is built around API requests, API keys, schemas, structured outputs, backend integrations, automation tools, workflow branching, document context, data validation, provider and model configuration, and pay-as-you-go usage.

What problem does Claix solve for developers?

Most business data is not born as clean JSON. It arrives as invoice PDFs, contracts, supplier spreadsheets, customer-uploaded forms, Word documents, scanned images, receipt photos, email HTML, XML exports, and raw text. A developer then has to turn that material into usable data.

Without a document-processing layer, the workflow often becomes:

Receive file
    ↓
Extract text
    ↓
Send text to an LLM
    ↓
Parse free-form response
    ↓
Fix field names
    ↓
Convert numbers and dates
    ↓
Handle missing fields
    ↓
Validate output
    ↓
Send to database or workflow

Claix is designed to shorten that path:

Receive file or content
    ↓
Send it to Claix with a schema
    ↓
Receive structured JSON
    ↓
Validate business rules
    ↓
Continue your workflow

What can developers process with Claix?

InputTypical use case
PDFInvoices, contracts, purchase orders, reports, RFPs, forms
Excel / CSVLead imports, customer records, supplier lists, operational data
Word and text documentsPolicies, proposals, contracts, internal procedures
ImagesReceipts, photographed documents, screenshots, scanned forms
TXT / HTML / XMLEmail bodies, webhooks, CRM exports, ticket content, system feeds
JSONGenerate Excel files with a predictable business structure

The key difference is that Claix is not just designed to display document text. It is designed to return data that another system can use.

How does schema-based processing work?

A schema defines the fields your application expects. For an invoice, you may define:

invoice_number
supplier_name
invoice_date
due_date
total_amount
currency
purchase_order_number

For a contract:

party_a
party_b
start_date
end_date
automatic_renewal
payment_terms
termination_penalty

For a CRM import:

full_name
email
phone
company
job_title
country

Claix processes the document against that structure and returns the fields in a predictable format.

{
  "invoice_number": "INV-2026-00456",
  "supplier_name": "Example Supplies Ltd",
  "invoice_date": "2026-03-14",
  "due_date": null,
  "total_amount": 1284.5,
  "currency": "EUR",
  "purchase_order_number": "PO-2049"
}

That response can be handled by ordinary application logic:

If invoice_number is missing:
    create review task

If total_amount is above approval threshold:
    notify finance

If supplier_name does not match the ERP:
    create exception

If all required fields are valid:
    write record to database

Why is Claix not a tool for casual users?

Claix is intentionally designed for people who are comfortable connecting systems. A casual end user might want to upload a PDF and ask: Can you summarize this document? Claix is aimed at a different workflow:

Extract the invoice number, supplier, total amount, currency,
and purchase order reference as structured JSON so my backend
can validate it and update the accounting workflow.

That requires technical concepts such as:

  • API authentication and API keys
  • Schemas and JSON
  • HTTP requests and structured fields
  • Workflow logic and error handling
  • Provider selection and data validation
  • Backend or automation integration

You do not need to build a complex AI system to use Claix, but you should have a workflow where structured outputs are valuable.

How does Claix fit into an application?

A common architecture looks like this:

Customer uploads a document
    ↓
Your application receives the file
    ↓
Your backend calls Claix
    ↓
Claix returns structured JSON
    ↓
Your application validates the data
    ↓
Your database, CRM, ERP, or workflow is updated

Claix can also sit inside an automation:

Gmail attachment
    ↓
n8n or Make workflow
    ↓
Claix document processing
    ↓
Structured JSON
    ↓
Database, Slack, CRM, ERP, or approval flow

The developer remains in control of:

  • The input source and schema
  • The data model and validation rules
  • Database writes and workflow branches
  • Review paths and user interface
  • Business logic

Claix handles the document intelligence layer.

Claix for backend developers

For backend teams, Claix can be used as a specialized service that receives unstructured content and returns a stable output. Useful examples include:

  • Extracting invoice data before writing to accounting software
  • Mapping supplier spreadsheets to an internal database format
  • Reading contract dates and conditions before updating a legal system
  • Turning customer-uploaded documents into onboarding records
  • Extracting information from support attachments
  • Converting HTML or XML exports into normalized fields
  • Generating Excel reports from JSON records
  • Adding document-derived context to an AI application

Claix is useful when you need the output to be machine-readable.

Claix for automation builders

Claix is also useful for developers and technical operators building workflows in n8n, Make, Zapier, Supabase, custom webhook systems, internal tooling platforms, serverless functions, backend jobs, CRM automations, and ERP workflows.

A typical workflow can be as simple as:

New PDF received
    ↓
Call Claix
    ↓
Receive JSON
    ↓
Check if a required field is missing
    ↓
Create a task or update a record

More advanced workflows can combine several documents:

Supplier invoice
    + purchase order
    + contract
        ↓
Claix processing and document context
        ↓
Compare values
        ↓
Trigger approval or review

Is Claix suitable for AI agents?

Yes, but Claix is not the agent itself. Claix is the document and data-processing layer that helps an agent receive cleaner inputs. Instead of giving an agent an entire PDF and expecting it to discover every important field, a developer can use Claix first:

Document
    ↓
Claix structured extraction
    ↓
Validated JSON
    ↓
AI agent makes decision or takes action

This is useful because it separates responsibilities clearly:

ResponsibilityBest handled by
Read and structure a business documentClaix
Validate dates, totals, IDs, and required fieldsYour code or workflow
Decide what happens nextYour agent or business logic
Update CRM, ERP, or databaseYour backend or automation tool
Escalate unclear casesYour review workflow

The result is easier to debug than an agent that must interpret a document, extract values, apply rules, and execute actions in one open-ended step.

Pricing for developers

Claix is designed for developer workflows that need to start small.

FeaturePrice
Excel / CSV to structured JSON€0.15 per processing request
PDF to structured JSON€0.15 per processing request
Text document to structured JSON€0.10 per processing request
Image to structured JSON€0.10 per processing request
TXT / HTML / XML to structured JSON€0.10 per processing request
Document Context query€0.03 per query
Knowledge Space query€0.03 per query
Initial trial100 free API calls
BYOK€0 Claix processing fee

With BYOK, developers can connect their own supported AI provider key, select a model, and pay no additional Claix 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.

Frequently asked questions

What is an AI data processing API for developers?
An AI data processing API for developers receives unstructured inputs such as PDFs, Excel files, Word documents, images, HTML, XML, or text and returns structured information that applications, databases, automations, and agents can use. Claix is built around this developer-first workflow.
Is Claix designed for non-technical users?
Claix is primarily designed for developers, automation builders, and technical teams. It is best suited to users who need API access, schemas, JSON outputs, workflow integrations, or backend document processing rather than a consumer document-chat experience.
Can I use Claix from my backend?
Yes. Claix is designed for server-to-server API integration. Your backend can send documents or content to Claix, receive structured JSON, validate the result, and continue with your own application logic.
Can I use Claix with n8n, Make, or Zapier?
Yes. Claix can be called through HTTP/API steps in automation platforms and can return structured data for the next workflow step.
What files can Claix process?
Claix supports PDF, Excel, CSV, Word and text documents, images, TXT, HTML, XML, and JSON-to-Excel workflows.
Does Claix return JSON?
Yes. Claix can return schema-based structured JSON designed for downstream systems and workflows.
Can I use my own AI provider key?
Yes. Claix supports BYOK for supported providers and models. Claix does not charge an additional processing fee for BYOK. Customers remain responsible for their AI provider's token usage and provider charges.
Does Claix guarantee perfect output?
No. Document quality, schema design, selected model, source complexity, and provider behavior may affect output. Developers should validate critical values and include human review for high-impact workflows.

Final answer

Claix is an AI data processing API for developers who need to turn documents into usable application data. It is designed for backend integrations, SaaS products, automation workflows, internal tools, AI agents, CRM and ERP integrations, database pipelines, and document-driven business processes.

It is not primarily designed as a casual document-chat tool for non-technical users.

If you need a developer-first API that turns PDFs, Excel, Word files, images, HTML, XML, and text into structured JSON, Claix gives you the document-processing layer your application or workflow needs.