Zinc API TypeScript Library

zinc is the official TypeScript SDK for the Zinc API — search, buy, track, and return products from major online retailers (Amazon, Walmart, and more) through a single, type-safe API.

Keywords: e-commerce API, place an order, buy products programmatically, Amazon ordering API, checkout automation, order tracking, returns, product search, AI agent commerce, autonomous purchasing, MPP / HTTP 402.

Every method is fully typed. Instantiate ZincClient once and call resource methods like zinc.orders.createOrder(...) or zinc.search.search(...).

Table of Contents

• Installation
• Reference
• Authentication
• Test Mode
• Errors
• Faq
• Usage
• Environments
• Request and Response Types
• Exception Handling
• Advanced
  • Subpackage Exports
  • Additional Headers
  • Additional Query String Parameters
  • Retries
  • Timeouts
  • Aborting Requests
  • Access Raw Response Data
  • Logging
  • Custom Fetch
  • Runtime Compatibility
• Contributing

Installation

npm install zinc

Reference

A full reference for this library is available here.

Authentication

Most endpoints require a Zinc API key (prefixed zn_), sent as the Authorization header. Pass it verbatim, including the Bearer prefix:

import { ZincClient } from "zinc";

const zinc = new ZincClient({
  apiKey: `Bearer ${process.env.ZINC_API_KEY}`, // "zn_..."
  // baseUrl defaults to https://api.zinc.com
});

The zinc.agent.* endpoints need no API key — they are paid per-call via MPP (HTTP 402), so an agent can order without an account.

Test mode

Use a test API key (zn_test_...) to hit the sandbox — same client, same base URL; the key prefix routes you to test data:

const zinc = new ZincClient({ apiKey: `Bearer ${process.env.ZINC_TEST_KEY}` });

zinc.orders.listTestProducts() returns product URLs that trigger specific sandbox scenarios.

Errors

Failed requests throw a typed ZincError exposing .statusCode and .body. Notable subtypes: PaymentRequiredError (HTTP 402 — returned by zinc.agent.* when payment is required) and UnprocessableEntityError (validation).

FAQ

Which version should I use? The package version mirrors the Zinc API version (CalVer, e.g. 2026.7.17 = API 2026-07-17). Pin an exact version or take latest.

Do I need an account to place orders as an agent? No. zinc.agent.createMppOrder settles payment via MPP (HTTP 402) — no API key required.

How is max_price interpreted? In cents. It's a ceiling; the order is not finalized above it.

Where are the full API docs? https://www.zinc.com/docs

Usage

Instantiate and use the client with the following:

import { ZincClient } from "zinc";

const client = new ZincClient({ apiKey: "YOUR_API_KEY" });
await client.orders.createOrder({
    body: {
        products: [{
                url: "https://www.amazon.com/dp/B07JGBW826"
            }],
        shipping_address: {
            first_name: "first_name",
            last_name: "last_name",
            address_line1: "address_line1",
            city: "city",
            postal_code: "postal_code",
            phone_number: "phone_number"
        },
        max_price: 1
    }
});

Environments

This SDK allows you to configure different environments for API requests.

import { ZincClient, ZincEnvironment } from "zinc";

const client = new ZincClient({
    environment: ZincEnvironment.Production,
});

Request and Response Types

The SDK exports all request and response types as TypeScript interfaces. Simply import them with the following namespace:

import { Zinc } from "zinc";

const request: Zinc.ValidateBulkUploadOrdersBulkValidatePostRequest = {
    ...
};

Exception Handling

When the API returns a non-success status code (4xx or 5xx response), a subclass of the following error will be thrown.

import { ZincError } from "zinc";

try {
    await client.orders.createOrder(...);
} catch (err) {
    if (err instanceof ZincError) {
        console.log(err.statusCode);
        console.log(err.message);
        console.log(err.body);
        console.log(err.rawResponse);
    }
}

Advanced

Subpackage Exports

This SDK supports direct imports of subpackage clients, which allows JavaScript bundlers to tree-shake and include only the imported subpackage code. This results in much smaller bundle sizes.

import { OrdersClient } from 'zinc/orders';

const client = new OrdersClient({...});

Additional Headers

If you would like to send additional headers as part of the request, use the headers request option.

import { ZincClient } from "zinc";

const client = new ZincClient({
    ...
    headers: {
        'X-Custom-Header': 'custom value'
    }
});

const response = await client.orders.createOrder(..., {
    headers: {
        'X-Custom-Header': 'custom value'
    }
});

Additional Query String Parameters

If you would like to send additional query string parameters as part of the request, use the queryParams request option.

const response = await client.orders.createOrder(..., {
    queryParams: {
        'customQueryParamKey': 'custom query param value'
    }
});

Retries

The SDK is instrumented with automatic retries with exponential backoff. A request will be retried as long as the request is deemed retryable and the number of retry attempts has not grown larger than the configured retry limit (default: 2).

Which status codes are retried depends on the retryStatusCodes generator configuration:

legacy (current default): retries on

• 408 (Timeout)
• 429 (Too Many Requests)
• 5XX (All server errors, including 500)

recommended: retries on

• 408 (Timeout)
• 429 (Too Many Requests)
• 502 (Bad Gateway)
• 503 (Service Unavailable)
• 504 (Gateway Timeout)

Use the maxRetries request option to configure this behavior.

const response = await client.orders.createOrder(..., {
    maxRetries: 0 // override maxRetries at the request level
});

Timeouts

The SDK defaults to a 60 second timeout. Use the timeoutInSeconds option to configure this behavior.

const response = await client.orders.createOrder(..., {
    timeoutInSeconds: 30 // override timeout to 30s
});

Aborting Requests

The SDK allows users to abort requests at any point by passing in an abort signal.

const controller = new AbortController();
const response = await client.orders.createOrder(..., {
    abortSignal: controller.signal
});
controller.abort(); // aborts the request

Access Raw Response Data

The SDK provides access to raw response data, including headers, through the .withRawResponse() method. The .withRawResponse() method returns a promise that results to an object with a data and a rawResponse property.

const { data, rawResponse } = await client.orders.createOrder(...).withRawResponse();

console.log(data);
console.log(rawResponse.headers['X-My-Header']);

Logging

The SDK supports logging. You can configure the logger by passing in a logging object to the client options.

import { ZincClient, logging } from "zinc";

const client = new ZincClient({
    ...
    logging: {
        level: logging.LogLevel.Debug, // defaults to logging.LogLevel.Info
        logger: new logging.ConsoleLogger(), // defaults to ConsoleLogger
        silent: false, // defaults to true, set to false to enable logging
    }
});

The logging object can have the following properties:

• level: The log level to use. Defaults to logging.LogLevel.Info.
• logger: The logger to use. Defaults to a logging.ConsoleLogger.
• silent: Whether to silence the logger. Defaults to true.

The level property can be one of the following values:

• logging.LogLevel.Debug
• logging.LogLevel.Info
• logging.LogLevel.Warn
• logging.LogLevel.Error

To provide a custom logger, you can pass in an object that implements the logging.ILogger interface.

Here's an example using the popular winston logging library.

import winston from 'winston';

const winstonLogger = winston.createLogger({...});

const logger: logging.ILogger = {
    debug: (msg, ...args) => winstonLogger.debug(msg, ...args),
    info: (msg, ...args) => winstonLogger.info(msg, ...args),
    warn: (msg, ...args) => winstonLogger.warn(msg, ...args),
    error: (msg, ...args) => winstonLogger.error(msg, ...args),
};

Here's an example using the popular pino logging library.

import pino from 'pino';

const pinoLogger = pino({...});

const logger: logging.ILogger = {
  debug: (msg, ...args) => pinoLogger.debug(args, msg),
  info: (msg, ...args) => pinoLogger.info(args, msg),
  warn: (msg, ...args) => pinoLogger.warn(args, msg),
  error: (msg, ...args) => pinoLogger.error(args, msg),
};

Custom Fetch

The SDK provides a low-level fetch method for making custom HTTP requests while still benefiting from SDK-level configuration like authentication, retries, timeouts, and logging. This is useful for calling API endpoints not yet supported in the SDK.

const response = await client.fetch("/v1/custom/endpoint", {
    method: "GET",
}, {
    timeoutInSeconds: 30,
    maxRetries: 3,
    headers: {
        "X-Custom-Header": "custom-value",
    },
});

const data = await response.json();

Runtime Compatibility

The SDK works in the following runtimes:

• Node.js 18+
• Vercel
• Cloudflare Workers
• Deno v1.25+
• Bun 1.0+
• React Native

Contributing

While we value open-source contributions to this SDK, this library is generated programmatically. Additions made directly to this library would have to be moved over to our generation code, otherwise they would be overwritten upon the next generated release. Feel free to open a PR as a proof of concept, but know that we will not be able to merge it as-is. We suggest opening an issue first to discuss with us!

On the other hand, contributions to the README are always very welcome!