The payments API is used to create a session to offer Klarna's payment methods as part of your checkout. As soon as the purchase is completed the order should be read and handled using the [`Order Management API`](https://docs.klarna.com/api/ordermanagement). **Note:** Examples provided in this section includes full payloads, including all supported fields , required and optionals. In order to implement a best in class request we recommend you don't include customer details when initiating a payment session. Refer to [Initiate a payment](https://docs.klarna.com/klarna-payments/integrate-with-klarna-payments/step-1-initiate-a-payment/) section for further details. Read more on [Klarna payments](https://docs.klarna.com/klarna-payments/).

Go to Download

tuutti/php-klarna-ordermanagement

0 Favers
58321 Downloads

The Order Management API is used for handling an order after the customer has completed the purchase. It is used for all actions you need to manage your orders. Examples being: updating, capturing, reading and refunding an order. Read more on the [Order management](https://docs.klarna.com/order-management/) process. # Authentication

Go to Download

tuutti/php-klarna-base

0 Favers
88741 Downloads

Klarna API base spec

Go to Download

thesmsworks/smsw-php-sdk

3 Favers
8927 Downloads

The SMS Works provides a low-cost, reliable SMS API for developers. Pay only for delivered texts, all failed UK messages are refunded.

Go to Download

sendx/sendx-php-sdk

0 Favers
5083 Downloads

# SendX REST API Documentation ## 🚀 Introduction The SendX API is organized around REST principles. Our API has predictable resource-oriented URLs, accepts JSON-encoded request bodies, returns JSON-encoded responses, and uses standard HTTP response codes, authentication, and verbs. **Key Features:** - 🔒 **Security**: Team-based authentication with optional member-level access - 🎯 **Resource-Oriented**: RESTful design with clear resource boundaries - 📊 **Rich Data Models**: Three-layer model system (Input/Output/Internal) - 🔗 **Relationships**: Automatic prefix handling for resource relationships - 📈 **Scalable**: Built for high-volume email marketing operations ## 🏗️ Architecture Overview SendX uses a three-layer model architecture: 1. **Input Models** (`RestE*`): For API requests 2. **Output Models** (`RestR*`): For API responses with prefixed IDs 3. **Internal Models**: Core business logic (not exposed in API) ## 🔐 Security & Authentication SendX uses API key authentication: ### Team API Key ```http X-Team-ApiKey: YOUR_TEAM_API_KEY ``` - **Required for all requests** - Team-level access to resources - Available in SendX Settings → Team API Key ## 🆔 Encrypted ID System SendX uses encrypted IDs for security and better developer experience: - **Internal IDs**: Sequential integers (not exposed) - **Encrypted IDs**: 22-character alphanumeric strings - **Prefixed IDs**: Resource-type prefixes in API responses (`contact_`) ### ID Format **All resource IDs follow this pattern:** ``` _ ``` **Example:** ```json { "id": "contact_BnKjkbBBS500CoBCP0oChQ", "lists": ["list_OcuxJHdiAvujmwQVJfd3ss", "list_0tOFLp5RgV7s3LNiHrjGYs"], "tags": ["tag_UhsDkjL772Qbj5lWtT62VK", "tag_fL7t9lsnZ9swvx2HrtQ9wM"] } ``` ## 📚 Resource Prefixes | Resource | Prefix | Example | |----------|--------|---------| | Contact | `contact_` | `contact_BnKjkbBBS500CoBCP0oChQ` | | Campaign | `campaign_` | `campaign_LUE9BTxmksSmqHWbh96zsn` | | List | `list_` | `list_OcuxJHdiAvujmwQVJfd3ss` | | Tag | `tag_` | `tag_UhsDkjL772Qbj5lWtT62VK` | | Sender | `sender_` | `sender_4vK3WFhMgvOwUNyaL4QxCD` | | Template | `template_` | `template_f3lJvTEhSjKGVb5Lwc5SWS` | | Custom Field | `field_` | `field_MnuqBAG2NPLm7PZMWbjQxt` | | Webhook | `webhook_` | `webhook_9l154iiXlZoPo7vngmamee` | | Post | `post_` | `post_XyZ123aBc456DeF789GhI` | | Post Category | `post_category_` | `post_category_YzS1wOU20yw87UUHKxMzwn` | | Post Tag | `post_tag_` | `post_tag_123XyZ456AbC` | | Member | `member_` | `member_JkL012MnO345PqR678` | ## 🎯 Best Practices ### Error Handling - **Always check status codes**: 2xx = success, 4xx = client error, 5xx = server error - **Read error messages**: Descriptive messages help debug issues - **Handle rate limits**: Respect API rate limits for optimal performance ### Data Validation - **Email format**: Must be valid email addresses - **Required fields**: Check documentation for mandatory fields - **Field lengths**: Respect maximum length constraints ### Performance - **Pagination**: Use offset/limit for large datasets - **Batch operations**: Process multiple items when supported - **Caching**: Cache responses when appropriate ## 🛠️ SDKs & Integration Official SDKs available for: - [Golang](https://github.com/sendx/sendx-go-sdk) - [Python](https://github.com/sendx/sendx-python-sdk) - [Ruby](https://github.com/sendx/sendx-ruby-sdk) - [Java](https://github.com/sendx/sendx-java-sdk) - [PHP](https://github.com/sendx/sendx-php-sdk) - [JavaScript](https://github.com/sendx/sendx-javascript-sdk) ## 📞 Support Need help? Contact us: - 💬 **Website Chat**: Available on sendx.io - 📧 **Email**: [email protected] - 📚 **Documentation**: Full guides at help.sendx.io --- **API Endpoint:** `https://api.sendx.io/api/v1/rest` [](https://god.gw.postman.com/run-collection/33476323-44b198b0-5219-4619-a01f-cfc24d573885?action=collection%2Ffork&source=rip_markdown&collection-url=entityId%3D33476323-44b198b0-5219-4619-a01f-cfc24d573885%26entityType%3Dcollection%26workspaceId%3D6b1e4f65-96a9-4136-9512-6266c852517e)

Go to Download

sendpost/sendpost_php_sdk

0 Favers
15779 Downloads

Email API and SMTP relay to not just send and measure email sending, but also alert and optimise. We provide you with tools, expertise and support needed to reliably deliver emails to your customers inboxes on time, every time.

Go to Download