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Now in public - Unified Inbox API

The Developer-First AI Agent Inbox
and API.

Build powerful autonomous agents with our AI agent inbox. Access all your channels via a unified inbox API and MCP inbox integration.

See how it works
SOC 2 ReadyEnd-to-end encrypted99.9% uptime SLA
Integrates with
Gmail
Outlook
Slack
Discord
WhatsApp
Instagram
Messenger
Telegram
SMTP / IMAP
Webhooks
Product Preview
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Channel integrations
0+
Messages processed daily
0.9%
Uptime guarantee
0ms
Avg. API response
Core Features

Powerful
messaging API

Connect your bots with a robust messaging API. Our inbox API and MCP inbox allow AI models to read and reply natively.

Unified Inbox

One API for email, chat, social messaging, bots, and webhooks. All messages normalized into a single schema.

AI Classification

Auto-tag by intent and sentiment. Context-aware draft replies generated instantly.

MCP Protocol

Native integration with Claude Code, Gemini CLI, OpenCode, Codex CLI, and ZeroClaw to empower AI agents.

Secure OAuth

Managed OAuth, encrypted credentials, webhook verification, and bot-token based channels where platforms require it.

Smart Routing

Route messages to team members or AI agents based on content, platform, or priority rules.

Real-Time Webhooks

HMAC-signed webhook notifications for new messages, connection changes, and status updates.

Integrations

Connect the channels
that matter

Gmail

Secure OAuth with automated incoming thread syncing.

Outlook

Connect Microsoft 365 Exchange mailboxes via OAuth.

SMTP/IMAP

Standard encrypted mail protocol for generic inboxes.

Slack

Sync channels and direct messages into the triage flow.

Discord

Listen to server channels using custom bot integrations.

WhatsApp

Read and respond to WhatsApp Business messages via Meta.

Instagram

Bring Instagram direct messages into the shared inbox.

Messenger

Handle Facebook Page messages from one workspace.

Telegram

Connect bot conversations through webhook or polling.

Webhooks

Inbound POST requests normalized into conversations.

For Developers

Three steps to
go live

01

Connect your channels

Securely link Gmail, Outlook, Slack, Discord, WhatsApp, Instagram, Messenger, Telegram, SMTP/IMAP servers, and webhook endpoints.

Terminal
$ POST /v1/connections { "provider": "gmail" }
02

Create an API key

Configure your workspace and get your access tokens from the settings panel.

Terminal
$ curl -X POST https://api.relvios.com/v1/keys
03

Read, route & reply

Fetch normalized streams, let AI draft replies, and track conversations via REST API or MCP protocol.

Terminal
$ GET /v1/threads?status=unread

Simple, transparent
pricing

Scale as your message volume grows. Save 30% on yearly plans.

Ready to unify
your inbox?

Start with a 3-day free trial. Connect your channels, integrate your AI agents, and experience unified messaging in minutes.

Building with an Inbox API

Developing AI tools requires structured data. Our AI agent inbox normalizes messages from every platform into a single, clean schema.

The inbox API allows you to fetch threads, send replies, and manage connections programmatically. This is perfect for developers building an MCP inbox for LLMs like Claude or GPT-4.

With our advanced messaging API, your AI agents can interact with customers across email, Discord, Slack, and WhatsApp without writing platform-specific code.