Inbox API
One API for all your email needs
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Connect any email account — Gmail, Outlook, IMAP — and give your AI agents, apps, and automations full inbox access through a secure REST API and native MCP tools. Credentials never leave the server.
Be the first to know when we launch
curl -X POST https://api.inbox-api.com/v1/send \
-H 'Authorization: Bearer tok_...' \
-H 'Content-Type: application/json' \
-d '{"to": "team@acme.com", "subject": "Q3 Report", "body": "..."}'The problem
Every AI agent needs email access. But IMAP is a nightmare to integrate, credentials can't be shared with LLMs safely, and every provider has a different API. Existing solutions cost $990/yr and weren't built for the age of AI agents.
How it works
Connect
Add your email accounts — Gmail, Outlook, or any IMAP provider
Create a token
Scoped permissions per account, per action. LLMs never see credentials
Build
REST API, MCP tools, webhooks, CLI — pick your interface
Built for
AI Agents & Assistants
Give Claude, GPT, or any MCP-compatible agent secure email access. Read, send, search, and manage email through standard MCP tools — no credential exposure, no custom integration code.
Developers & SaaS Products
Full inbox access via API — read, send, search, and reply. No IMAP integration, no provider lock-in. One endpoint to connect any email account to your product.
Helpdesk & Support
Listen for incoming emails via webhooks and auto-create tickets. Thread tracking, attachments, and real-time notifications built in.
CRM & Sales Tools
Sync email conversations with contacts automatically. Search by sender, track threads, and keep your CRM in sync without building an IMAP integration.
Workflow Automation
Process invoices, parse receipts, route support requests, or trigger actions when specific emails arrive. Webhooks with tiered payloads — from lightweight notifications to full message bodies.
No-Code & Low-Code Platforms
Integrate email into Zapier, Make, n8n, or custom workflows through a clean REST API with scoped API tokens — no IMAP credentials exposed to third parties.
Everything you need to build with email
IMAP Sync
Real-time mailbox synchronization with incremental sync, thread reconstruction, and full-text search.
Send & Reply
Compose, reply, and manage drafts through a clean API. Attachments, HTML, and plain text supported.
Multi-Provider
Gmail, Outlook, Yahoo, iCloud — connect any provider with built-in presets or custom IMAP/SMTP settings.
Credential Protection
OAuth and password credentials stay on the server. API tokens with scoped permissions ensure LLMs never see raw credentials.
MCP Server
First-class Model Context Protocol support. Let AI agents read, send, and manage email through standard MCP tools.
Webhooks
Real-time notifications when emails arrive, are replied to, or change state. Tiered payloads from lightweight pings to full message bodies.
CLI & API Tokens
Full-featured CLI for automation and scripting. Scoped API tokens with granular per-account, per-action permissions.