Sending millions of emails needs testing infrastructure before mass deployment. Our sandbox systems help businesses stay compliant with GDPR, CAN-SPAM and Data protection standards.
Now, we will test, fix, and boost every part of email campaigns before we make them live.
Call any endpoint with your API key. RESTful, predictable, and fast.
TrueSend fetches data, runs spam analysis, validates HTML, and checks auth.
Get structured JSON with emails, scores, headers, and validation results.
Test email content, subject lines, templates, and personalisation before sending real campaigns.
Automatically test welcome emails, cart recovery and drip flows to ensure that every trigger fires at the right time.
Analysing the results and sending sample API calls helps you achieve proper integration and data flow.
Trigger events like clicks, purchases, or signups and make test contacts. It will test the behaviour of the actual campaign without hassles.
Check how your emails look across multiple devices and inbox clients. Don't compromise on formatting & design.
Watch all test activity, API responses, and errors. This allows you to find and fix issues without hassle before they move to production.
Start using the sandbox API in 4 simple steps.
Log into your ESP account, and there you can check sandbox tools and settings.
Use the sandbox environment with utmost safety by creating secure test credentials.
You can use the testing tool bundled with this API and easily test API calls and email functionality.
Review responses, find errors and correct them before going to production campaigns.
Get started with TrueSend's Sandbox API using SDKs for Node.js, Python, PHP, Ruby, Go, and Java, or connect directly via the REST API in any programming language.
Compare Plans// Node.js Spam Check API const axios = require('axios'); const res = await axios.get 'https://api.truesend.io/v1/messages', params: { to: 'user@test.com' }, headers: 'Authorization': 'Bearer ts_api_key' const email = res.data[0]; // 0.8 console.log(email.dkim_valid); // true console.log(email.spf_result); // "pass"
Harness a complete set of embedded utilities to back secure testing, debugging, and optimisation of email campaigns.
Generate and manage API keys and secrets for secure access to the sandbox environment.
Learn MoreAuthenticate delivery flow and content by sending controlled test emails. These emails don't have to reach real users.
Learn MoreEverything you need to know about TrueSend's Sandbox API