Service API Overview

Real-Time Verification & Threats API

The Verification & Threats API delivers comprehensive email validation and threat detection in a single API request, making it ideal for signup forms, onboarding workflows, and transactional systems.

This high-speed API performs real-time analysis to identify:

• Invalid or undeliverable email addresses
• Disposable and temporary email services
• Role-based and non-person accounts
• High-risk and abusive email patterns
• Known threat indicators and hygiene risks

Key Benefits

• Single-request integration
• Sub-second response times
• Continuous, real-time data cleansing
• Designed for high-volume, high-availability environments

Integration Method:

• HTTPS REST API
• HTTP POST
• JSON request / JSON response

See detailed documentation: Verification / Threats API

Threats-Only (Hygiene) API

The Threats-Only API is designed for organizations that need advanced threat detection and list-hygiene intelligence to safeguard campaign performance and protect sender reputation.

This API focuses exclusively on identifying:

• Disposable and throwaway addresses
• Abuse-prone email sources
• Suspicious or anomalous patterns
• Known high-risk email infrastructure

Ideal Use Cases

• Fraud prevention
• Account abuse reduction
• Lead quality scoring
• Security-focused validation layers

Key Benefits

• Lightweight, ultra-fast processing
• Minimal payload for maximum performance
• Seamless insertion into existing workflows

Integration Method:

• HTTPS REST API
• HTTP POST
• JSON request / JSON response

See detailed documentation: Threats Only API

Service Credits Balance API

Real-Time Visibility into Account Usage. The Service Credits Balance API provides a simple, automated way to retrieve the current balance of your Impressionwise service credits in real time. This API enables organizations to monitor usage, manage consumption, and support internal reporting or billing workflows without manual intervention.

Designed for seamless system integration, the API allows authenticated users to programmatically query their available service credits at any time, ensuring transparency and operational continuity.

Key Benefits

• Real-time service credit balance retrieval
• Automated usage tracking and monitoring
• Supports internal dashboards, alerts, and reporting
• Eliminates manual balance checks

Integration Overview

• Secure HTTPS REST API
• Authenticated via API key
• Lightweight request with JSON response
• Suitable for polling or scheduled checks

See detailed documentation: Service Credits Balance API

Bulk FTP Transfer Services

Secure, Automated High-Volume Data Processing. For clients with large, regularly scheduled data sets, Impressionwise offers a secure Bulk FTP Transfer service designed for automated, batched submissions. This option provides 24/7 access to Impressionwise cleaning services while supporting established file-based workflows.

The Bulk FTP service is ideal for organizations that require consistent, scheduled data transfers and prefer a traditional file delivery model alongside API-based integrations.

Key Benefits

• Designed for high-volume, batched submissions
• Fully automated, scheduled processing workflows
• 24/7 access with no manual wait times
• Secure file transfer and processing

Use Cases

• Nightly or weekly data feeds
• Large marketing or CRM list processing
• Legacy system integrations
• High-throughput cleansing operations

Integration Overview

• Secure FTP/SFTP access
• Dedicated credentials per client
• Automated ingestion and processing
• Results delivered through established retrieval workflows

See detailed documentation: Bulk FTP Transfer Services

Bulk API – High-Volume List Processing

For large-scale email datasets, Impressionwise offers a modern Bulk API designed for high-volume list submission and efficient result retrieval.

Unlike traditional FTP-based workflows, the Bulk API enables:

• Programmatic list submission
• Asynchronous processing
• Secure status polling or callback workflows
• Faster turnaround and improved reliability

Key Benefits

• Scales to millions of records
• REST-based submission and retrieval
• Designed for automation and orchestration
• Eliminates legacy FTP dependencies

Common Use Cases

• CRM and marketing database cleansing
• Pre-campaign list hygiene
• Ongoing data quality maintenance
• Migration and enrichment workflows

Integration Method:

• Secure RESTful API
• JSON or structured file payloads
• Status and results retrieval endpoints

See detailed documentation: Bulk API List Submission API

Enterprise-Grade API Standards

All Impressionwise APIs are built to meet modern enterprise expectations:

• Secure HTTPS encryption for all data in transit
• API key authentication with key rotation and revocation support
• Rate limiting and abuse protection
• High availability architecture
• Versioned endpoints to prevent breaking changes
• Predictable, machine-readable error handling

Flexible Integration Options

Impressionwise APIs integrate easily with:

• Custom applications and microservices
• CRM and marketing automation platforms
• E-commerce and subscription systems
• Data pipelines and ETL workflows
• Automation platforms such as Zapier

Custom API Development

Tailored Integrations to Fit Your Business. At Impressionwise, we understand that every organization has unique workflows and technical requirements. That’s why we offer custom API development services, enabling you to integrate our verification and data hygiene capabilities directly into your systems exactly the way you need.

Whether it’s a specialized real-time endpoint, bespoke batch processing workflow, or a unique reporting structure, our team can design, implement, and support APIs that match your operational needs. We work closely with your technical team to ensure:

• Seamless integration with existing applications, CRMs, or marketing platforms
• Secure, high-performance endpoints built to enterprise standards
• Flexibility to accommodate custom workflows, triggers, or reporting requirements
• Ongoing support and maintenance for evolving business needs

With Impressionwise custom APIs, you get the power of our best-of-breed verification and threat intelligence services adapted to your organization’s unique processes, ensuring maximum efficiency, automation, and reliability.

Whether validating a single email in real time or processing millions of records in bulk, Impressionwise adapts to your architecture — not the other way around.

Questions? Contact us to request API access or review detailed technical documentation.