EmptyInbox
EmptyInbox: A low-cost API inbox service built for agent workflows, testing, and automation. Ranked #10 of 33 in Temporary Email Services by our editors (8.1/10); pricing: Free plan; best for AI-agent workflows needing cheap inbox credits.
At a glance
- Editor score8.1 / 10
- PricingFree plan
- Best forAI-agent workflows needing cheap inbox credits
- Free planYes
- Inbox lifespanDays
- Facts checked21 Sep 2026
Where it wins
- REST API, MCP server, and web access for disposable inboxes
- Integrates with OpenAPI, GPT Actions, LangChain, n8n, and Playwright
- Top-up credits start at $1 per 10 inboxes and do not expire
Where it doesn't
- Inbox protection is not included
- Messages are automatically deleted after seven days
- Attachments are not verified
Our verdict on EmptyInbox
EmptyInbox provides disposable email inboxes for AI agents, developers, testing, and automation workflows. It is available through the web and API, with REST endpoints for creating inboxes and reading messages. Email polling uses wait_for_message, while API-key authentication supports programmatic access. The product is a focused fit for workflows that need temporary addresses rather than persistent mailboxes, including agent-driven testing and browser automation.
The Free plan costs $0 and includes REST API and MCP server access, email polling via wait_for_message, automatic deletion after seven days, and API-key authentication. The Top-up plan starts at $1 per 10 inboxes and adds unlimited inbox top-ups, credits that do not expire, priority email delivery, and an OpenAPI specification for GPT Actions and LangChain. Inbox credits can be purchased using USDT or Bitcoin. This pricing structure suits intermittent automation and disposable test accounts, especially when unused paid credits should remain available for later workflows.
Its main distinction is ecosystem fit for AI and automation tools. EmptyInbox lists integrations with MCP, OpenAPI, GPT Actions, LangChain, CrewAI, n8n, Playwright, and Cypress, giving developers several ways to connect temporary inboxes to agent or testing pipelines. The trade-off is a narrow retention and protection model: messages are deleted after seven days, and inbox protection is not included. Attachments are not verified, so workflows that depend on attachment handling should choose an alternative. EmptyInbox is a practical choice for API-led temporary email tasks, but less suitable for protected or long-term message storage.
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EmptyInbox pricing
All 2 EmptyInbox plans and prices →
EmptyInbox fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Not verified |
| Inbox lifespan | Days |
| Retention period | 7 days |
| Custom domains | Not verified |
| API access | Yes |
| Attachments | Not verified |
| Inbox protection | None |
| Deployment | Cloud |
| Platforms | Web |
| Support | Community, Docs |
| Built for | Solo, Small business, Mid-market (editorial estimate) |
| Integrations | 8 integrations: MCP, OpenAPI, GPT Actions, LangChain, CrewAI, n8n … |
| Pricing | Free plan (source) |
| Website | emptyinbox.me |
| Facts checked | 21 Sep 2026 |
EmptyInbox integrations
EmptyInbox lists 8 integrations on its own site.
- MCP
- OpenAPI
- GPT Actions
- LangChain
- CrewAI
- n8n
- Playwright
- Cypress
Alternatives to EmptyInbox
- MailinatorA mature testing service for private inboxes, automation, APIs, and delivery workflows.9.4
- Temp Mail APIA developer-focused temporary email service with strong automation and API coverage.9.2
- TemporaryEmail.devA developer-focused temporary email service with retention, routing, and delivery analytics.9.0
See all EmptyInbox alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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