@suparse/sdk

@suparse/sdk

Official JavaScript and TypeScript SDK for the Suparse Document Processing API.

Suparse is an AI-powered document processing API for extracting structured data from any document type, including invoices, receipts, bank statements, purchase orders and many more.

Requirements

• Node.js 20+
• Browser, edge, or Node.js runtime with fetch, Blob, and FormData

Installation

npm install @suparse/sdk

Authentication

You'll need an API key to use the SDK. To obtain one:

• Sign in at suparse.com
• Go to the API Keys tab
• Enter a key name and click Generate New Key
• Copy the key value. It will be shown only once.

Set it as an environment variable when using the Node client:

export SUPARSE_API_KEY="your_api_key_here"

Or pass it directly to the SDK constructor:

import { SuparseNodeClient } from "@suparse/sdk/node";

const client = new SuparseNodeClient({ apiKey: "your_api_key_here" });

Quick Start

// Node.js SDK, with SUPARSE_API_KEY set
import { SuparseNodeClient } from "@suparse/sdk/node";

const client = new SuparseNodeClient();

try {
  const result = await client.extract("invoice.pdf");

  for (const item of result.succeeded) {
    console.log(item.original_file);
    console.log(item.documents.map((doc) => doc.extracted_data));
  }
} finally {
  await client.close();
}

// Browser or edge runtime
import { SuparseClient } from "@suparse/sdk";

const client = new SuparseClient({ apiKey: "your_api_key_here" });
const file = new File([fileBytes], "invoice.pdf", { type: "application/pdf" });

const result = await client.extract(file);
console.log(result.succeeded);

SDK Usage

The SDK exports two clients:

• SuparseClient from @suparse/sdk: browser/edge-compatible client for Blob, File, and URL inputs
• SuparseNodeClient from @suparse/sdk/node: Node.js client with file paths, folder processing, and disk output helpers

Both clients handle uploads, polling, exports, retries, rate limits, and parallel batch processing. Batch extraction runs up to 10 files concurrently.

Node.js

Use @suparse/sdk/node for local files and server-side applications.

import { SuparseNodeClient } from "@suparse/sdk/node";

const client = new SuparseNodeClient();

try {
  const result = await client.extract(["invoice1.pdf", "invoice2.pdf"]);

  for (const item of result.succeeded) {
    console.log(item.original_file);
    console.log(item.documents.map((doc) => doc.extracted_data));
  }

  for (const failed of result.failed) {
    console.error(failed.file, failed.error);
  }
} finally {
  await client.close();
}

The Node client reads SUPARSE_API_KEY and SUPARSE_API_URL from environment variables by default, so you can use new SuparseNodeClient() if those are set. Pass apiKey and baseUrl directly when you do not want to use environment variables.

Browser and Edge

Use @suparse/sdk for runtimes without Node.js file-system APIs.

import { SuparseClient } from "@suparse/sdk";

const client = new SuparseClient({ apiKey: "your_api_key_here" });

const result = await client.extract(fileInput.files![0], {
  split: true,
});

for (const item of result.succeeded) {
  console.log(item.documents.map((doc) => doc.extracted_data));
}

You can also pass a URL; the SDK fetches it and uploads the response body:

const result = await client.extract(new URL("https://example.com/invoice.pdf"));

Extract One or More Documents

extract() is the primary SDK API.

Node.js File Paths

import { SuparseNodeClient } from "@suparse/sdk/node";

const client = new SuparseNodeClient();

const result = await client.extract("invoice.pdf", {
  template_id: "276a0aa8-84bc-4491-a2e7-1ea13381790c",
  split: true,
  cleanup: true,
  onProgress: (item) => {
    if ("file" in item) {
      console.error(`Failed: ${item.file} - ${item.error}`);
    } else {
      console.log(`Done: ${item.original_file}`);
    }
  },
});

SuparseNodeClient accepts a single file path, an array of file paths, Blob/File objects, URL objects, or an array mixing those input types.

Batch Processing

const result = await client.extract(["receipts/jan.pdf", "receipts/feb.pdf"]);

for (const item of result.succeeded) {
  console.log(item.original_file, item.documents);
}

for (const failed of result.failed) {
  console.error(failed.file, failed.error);
}

console.log(`Total: ${result.total}`);

Browser Files

import { SuparseClient } from "@suparse/sdk";

const client = new SuparseClient({ apiKey: "your_api_key_here" });
const files = Array.from(fileInput.files ?? []);

const result = await client.extract(files, {
  split: false,
  auto_approve: true,
});

SuparseClient accepts Blob, File, and URL inputs. Use SuparseNodeClient when you need local file paths or disk output helpers.

Extract a Folder

extractFolder() is available from SuparseNodeClient. It scans a directory for supported files and delegates to extract().

import { SuparseNodeClient } from "@suparse/sdk/node";

const client = new SuparseNodeClient();

const result = await client.extractFolder("./receipts/", {
  template_id: "276a0aa8-84bc-4491-a2e7-1ea13381790c",
  split: true,
  cleanup: true,
});

for (const item of result.succeeded) {
  console.log(item.original_file, item.documents);
}

extractFolder() scans the immediate directory only, filters to supported extensions, sorts the files by name, and returns an empty BatchResult when no supported files are found.

Result Data

Each successful item is a TaskExport. Its documents array contains the extracted document records and parsed fields:

for (const item of result.succeeded) {
  console.log(item.task_id);
  console.log(item.original_file);

  for (const document of item.documents) {
    console.log(document.document_id);
    console.log(document.template_id);
    console.log(document.page_start, document.page_end);
    console.log(document.credits_used);
    console.log(document.extracted_data);
  }
}

For single-page documents, documents usually has one entry. When split is enabled, a single uploaded PDF can produce multiple document entries with their own page ranges and template IDs.

Low-Level API

Use the low-level methods when you need direct control over upload, polling, export, and deletion.

import { SuparseNodeClient } from "@suparse/sdk/node";

const client = new SuparseNodeClient();

// Upload a file and get back a task ID
const taskId = await client.uploadFile("invoice.pdf", {
  template_id: "276a0aa8-84bc-4491-a2e7-1ea13381790c",
  split: false,
  auto_approve: true,
});

// Poll until processing completes
const { status, documentIds } = await client.pollTaskStatus(taskId);

// Fetch results in memory
const exportsJson = await client.fetchResults(documentIds);

// Or write results to disk
await client.downloadResults(documentIds, "output.json");

// Delete documents by ID
await client.deleteDocuments(["550e8400-e29b-41d4-a716-446655440000"]);

// List available templates
const templates = await client.listTemplates();
for (const template of templates) {
  console.log(`${template.name} (${template.template_language})`);
}

// Include system templates too
const allTemplates = await client.listTemplates({ includeSystem: true });

Browser and edge runtimes can use uploadFromSource() instead of uploadFile():

import { SuparseClient } from "@suparse/sdk";

const client = new SuparseClient({ apiKey: "your_api_key_here" });

const taskId = await client.uploadFromSource(fileInput.files![0], {
  split: true,
  auto_approve: true,
});
const { documentIds } = await client.pollTaskStatus(taskId);
const exportsJson = await client.fetchResults(documentIds);

Node Convenience Methods

SuparseNodeClient also exposes convenience methods for file-based workflows:

import { SuparseNodeClient } from "@suparse/sdk/node";

const client = new SuparseNodeClient();

// Process one document and write the JSON export to disk.
await client.processDocument("invoice.pdf", "results.json", {
  template_id: "276a0aa8-84bc-4491-a2e7-1ea13381790c",
  split: false,
  cleanup: true,
});

// Process multiple files and receive raw task/document IDs.
const { succeeded, failed } = await client.processBatch(["a.pdf", "b.pdf"], {
  template_id: "276a0aa8-84bc-4491-a2e7-1ea13381790c",
  split: true,
});

for (const item of succeeded) {
  console.log(item.filePath, item.taskId, item.documentIds);
}

for (const item of failed) {
  console.error(item.filePath, item.taskId, item.error);
}

Error Handling

All SDK exceptions inherit from SuparseError.

import {
  SuparseNodeClient,
  SuparseError,
  SuparseAuthError,
  SuparseNetworkError,
  SuparsePollingTimeoutError,
} from "@suparse/sdk/node";

const client = new SuparseNodeClient({ apiKey: "your_api_key_here" });

try {
  const result = await client.extract("invoice.pdf");
  console.log(result.succeeded);
} catch (error) {
  if (error instanceof SuparseAuthError) {
    console.error("Invalid API key");
  } else if (error instanceof SuparseNetworkError) {
    console.error("Connection failed");
  } else if (error instanceof SuparsePollingTimeoutError) {
    console.error("Processing timed out");
  } else if (error instanceof SuparseError) {
    console.error(`Unexpected Suparse error: ${error.message}`);
  } else {
    throw error;
  }
}

For batch operations, check result.failed to handle per-file errors without catching exceptions:

const result = await client.extract(["a.pdf", "b.pdf", "c.pdf"]);

for (const item of result.succeeded) {
  console.log(`OK: ${item.original_file} -> ${item.documents.map((doc) => doc.document_id)}`);
}

for (const failed of result.failed) {
  console.error(`FAIL: ${failed.file} -> ${failed.error}`);
}

Reference

Constructor Parameters

SuparseClient requires apiKey directly. SuparseNodeClient can read apiKey and baseUrl from environment variables.

Parameter	Type	Default	Description
apiKey	string	SUPARSE_API_KEY in SuparseNodeClient only	Your API key
baseUrl	string	SUPARSE_API_URL env var or https://api.suparse.com/api/v1	API base URL
timeoutMs	number	60000	Request timeout in milliseconds
maxRetries	number	3	Max retry attempts for retryable network/API errors
pollInterval	number	5	Initial seconds between polling attempts
maxPollAttempts	number	300	Max polling attempts before timeout

Polling uses exponential backoff starting from pollInterval seconds and caps the delay at 15 seconds. maxPollAttempts limits the total number of poll attempts before SuparsePollingTimeoutError is thrown.

Result Objects

Object	Properties	Description
TaskExport	task_id, original_file, total_documents_extracted, documents	Successfully extracted file
DocumentExport	document_id, file_name, page_start, page_end, template_id, credits_used, extracted_data	Extracted document and parsed fields
FailedResult	file, error	File that failed during extraction
BatchResult	succeeded, failed, total	Container for batch results

Exceptions

All exceptions inherit from SuparseError.

Exception	Raised When
SuparseError	Base exception for all SDK errors
SuparseNetworkError	Network connection fails or times out
SuparsePollingTimeoutError	Polling exceeds maxPollAttempts
SuparseProcessingError	Document fails to process on the server
SuparseAPIError	Base for HTTP error responses; has statusCode and responseBody
SuparseAuthError	401/403 authentication or authorization error
SuparseNotFoundError	404 resource not found
SuparseRateLimitError	429 too many requests
SuparseServerError	5xx server error
SuparseSDKError	SDK fails to parse or handle the expected API response

extract() Parameters

Parameter	Type	Default	Description
files	Node: string, Blob, File, URL, or array; browser/edge: Blob, File, URL, or array	required	One or more files to process
template_id	string	undefined	Template ID (auto-detect if omitted)
split	boolean	false	Auto-split multi-page documents
auto_approve	boolean	true	Set to false to require human review in the Suparse UI
cleanup	boolean	false	Delete documents from server after extraction
onProgress	(result) => void	undefined	Called with each TaskExport or FailedResult as it completes

cleanup deletes the uploaded parent task documents after results have been fetched. Deleting a parent document also deletes its child documents server-side.

extractFolder() Parameters

extractFolder() is available only in @suparse/sdk/node.

Parameter	Type	Default	Description
folder	string	required	Directory to scan
pattern	string	currently reserved	Present in the options type; current implementation scans supported files in the directory
template_id	string	undefined	Template ID (auto-detect if omitted)
split	boolean	false	Auto-split multi-page documents
auto_approve	boolean	true	Set to false to require human review in the Suparse UI
cleanup	boolean	false	Delete documents from server after extraction
onProgress	(result) => void	undefined	Called with each result as it completes

Supported Files

Extension	MIME Type
.pdf	application/pdf
.jpg, .jpeg	image/jpeg
.png	image/png
.heic	image/heic
.heif	image/heif

CLI

The companion CLI is published as suparse:

npm install -g suparse
suparse process invoice.pdf -o results.json

Documentation

Full API documentation is available at suparse.com/docs.

License

MIT