The iMessage API platform introduces group messaging, native reactions, HMAC-SHA256 webhook signing, and a fully RESTful API with OpenAPI specification.
Blooio, the leading iMessage API platform, announced the general availability of API v2, a major release that brings group chat support, native tapback reactions, cryptographically signed webhooks, and a modernized RESTful architecture to developers building iMessage-enabled applications.
The new API version addresses the growing demand from businesses and developers who need to integrate Apple’s iMessage protocol into customer communication workflows, AI agents, and automation platforms.
We are incredibly excited about 2026. There are so many new features in the pipeline, and this is just the beginning. Stay tuned”
— David Harvey, Founder of Blooio
Group Chat Capabilities
API v2 introduces full group chat management, allowing developers to create iMessage groups, rename conversations, set custom group icons, and manage participants programmatically. The platform delivers real-time webhooks for group events including name changes and icon updates, enabling applications to stay synchronized with conversation state.
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“Group messaging has been our most requested feature,” said David Harvey, Founder of Blooio. “Businesses can now coordinate with teams, manage multi-party customer conversations, and build collaborative experiences. All through a simple API. We are incredibly excited about what we have planned for 2026. There are so many new features in the pipeline, and this is just the beginning. Stay tuned.”
Native Tapback Reactions
Developers can now send and receive iMessage tapback reactions. The API supports both adding and removing reactions, with dedicated webhook events for real-time reaction notifications. This enables applications to capture user sentiment and engagement in ways previously impossible through third-party messaging APIs.
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Enterprise-Grade Webhook Security
API v2 introduces HMAC-SHA256 signed webhooks, allowing developers to cryptographically verify that incoming webhook payloads originate from Blooio. Each webhook can be configured with a unique signing secret, which can be rotated at any time. The platform also provides comprehensive webhook logs with replay functionality, making debugging and auditing straightforward.
Modern RESTful Architecture
The new API follows RESTful conventions with consistent resource naming, proper HTTP methods, and standardized error responses. A complete OpenAPI 3.0 specification is available, enabling automatic SDK generation and seamless integration with API development tools. Additional endpoints include typing indicators, read receipts, and contact management.
Extensive Integration Ecosystem
Blooio integrates with popular automation platforms including n8n, Zapier, Make, Clay, and High Level. The platform also offers an MCP server for Model Context Protocol, enabling AI assistants built with OpenAI, Anthropic Claude, Cursor, and Cline to send and receive iMessages natively.
