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Vendor malpka32
Package inpost-buy-sdk
Short Description PHP client for InPost Buy (inpsa) API
License MIT

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Informations about the package inpost-buy-sdk

InPost Buy SDK (inpsa)

PHP client for the InPost Buy API (inpsa) — sell your products through InPost's marketplace. Categories, offers, orders — all wrapped in a clean, type-safe interface.

What is InPost Buy?

InPost Buy (inpsa) lets merchants integrate their product catalog and orders with InPost's platform. You publish offers, receive orders, and update their status — all via REST API. This SDK handles authentication, serialization, and mapping so you focus on business logic.

Features

Categories — fetch product categories as a tree (read-only), with details and attributes
Accept-Language — set response language (Polish pl or English en) via Language enum
Offers — create single or batch offers with products, stock, and pricing; close/reopen; events; deposit types
Offer attachments — list, upload, download, delete attachments (images etc.)
Orders — list orders, fetch details, accept or refuse with status updates
OAuth2 — client credentials grant (default) with in-memory caching; OAuth2 PKCE (Authorization Code flow) for merchant integrations (e.g. PrestaShop modules)
Custom token provider — use InPostBuyClient::createWithTokenProvider() with any AccessTokenProviderInterface
Typed DTOs — OfferDto, ProductDto, OrderDto etc., no raw arrays in your code
Exceptions — NotFoundException, BadRequestException, ServerException etc. with HTTP status and error details

Requirements

PHP 8.1+
Symfony HttpClient (or any PSR-18-compatible client via Symfony contracts)
ramsey/collection

Installation

Quick Start

Usage

Language (Accept-Language)

API returns localized content (category names, error messages etc.). Set language via Language enum:

Supported values: Language::Polish (pl), Language::English (en).

Creating an Offer

An offer is built from nested DTOs: ProductDto, StockDto, PriceDto. Optionally add attributes (e.g. color, size) and dimensions.

Batch Offers

Create multiple offers in one request:

Listing and Filtering Offers

OAuth2 PKCE (merchant flow)

For integrations where merchants authorize via OAuth2 (e.g. PrestaShop modules), use PKCE flow:

Orders

Error Handling

The SDK throws specific exceptions for HTTP errors:

Exception	HTTP
`BadRequestException`	400
`UnauthorizedException`	401
`ForbiddenException`	403
`NotFoundException`	404
`UnprocessableEntityException`	422
`TooManyRequestsException`	429
`ServerException`	5xx

All extend malpka32\InPostBuySdk\Exception\ApiException and provide:

getStatusCode() — HTTP status code
getResponseBody() — raw response body
getErrorResponse() — parsed error (errorCode, errorMessage, details)
isRetryable() — true for 5xx and 429
getRetryAfterSeconds() — from Retry-After header when available

Testing & quality

With Docker:

CI runs on push/PR (PHP 8.1–8.3): code style (PSR-12), PHPStan, tests with coverage. See Actions.

Documentation

Official InPost Buy (inpsa) API docs: inpsa-api-portal.inpost-group.com

Support the project

This project is actively maintained: we keep it in sync with InPost API changes and welcome issues and pull requests on GitHub.

If this library helps you, consider buying me a coffee — it allows me to maintain and update the library alongside InPost API changes.

→ buycoffee.to/malpka32

License

MIT

All versions of inpost-buy-sdk with dependencies

PHP Build Version

Package Version

Version 0.7.6 Release 08. Jul 2026
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Requires php Version >=8.1
ramsey/collection Version ^2.0
symfony/http-client-contracts Version ^2.5 || ^3.0
symfony/mime Version ^6.4 || ^7.0

Composer command for our command line client (download client) This client runs in each environment. You don't need a specific PHP version etc. The first 20 API calls are free. Standard composer command

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