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Mailjet Invalid JSON Payload

The JSON payload structure does not match the Mailjet API documentation.

Understanding Mailjet: An Overview

Mailjet is a powerful Email Communication API provider that allows developers to send, receive, and track emails effortlessly. It is widely used for transactional and marketing emails, offering robust features such as email templates, real-time analytics, and advanced email automation.

Identifying the Symptom: Invalid JSON Payload

When working with Mailjet's API, you might encounter an error message indicating an 'Invalid JSON Payload'. This error typically arises when the JSON data sent to the API does not conform to the expected structure.

Common Error Message

The error message usually looks like this:

{"ErrorMessage": "Invalid JSON payload"}

Exploring the Issue: MJ-011

The error code MJ-011 signifies that the JSON payload submitted to the Mailjet API is malformed or does not adhere to the required schema. This can occur due to various reasons such as missing fields, incorrect data types, or syntax errors.

Root Causes

  • Missing required fields in the JSON payload.
  • Incorrect data types for specific fields.
  • Syntax errors like missing commas or brackets.

Steps to Fix the Issue

To resolve the 'Invalid JSON Payload' error, follow these steps:

1. Validate JSON Structure

Ensure that your JSON payload is correctly structured. You can use online tools like JSONLint to validate your JSON syntax.

2. Check Mailjet API Documentation

Refer to the Mailjet API documentation to ensure that your JSON payload includes all required fields and follows the correct format.

3. Correct Data Types

Verify that all fields in your JSON payload have the correct data types as specified in the API documentation. For example, ensure that numerical fields are not enclosed in quotes.

4. Test with Sample Payloads

Use sample payloads provided in the Mailjet documentation to test your API requests. This can help identify discrepancies in your JSON structure.

Conclusion

By carefully validating your JSON payload and adhering to the Mailjet API documentation, you can effectively resolve the 'Invalid JSON Payload' error. For further assistance, consider reaching out to Mailjet's support team.

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