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EmptyInbox
What it is
EmptyInbox provides disposable email inboxes for AI agents and developers through a REST API, an MCP server, and a web inbox. A new address can be created for each task or agent run. Messages can be polled, or an MCP wait_for_message flow can receive them and extract verification codes; the web inbox uses passkey sign-in and displays extracted codes and links beside messages. Each inbox creation costs one credit, while receiving, listing, and reading messages are free. The free plan includes five credits, and paid top-ups start at $1, paid once for 10 credits; credits never expire. Messages are automatically deleted after seven days. EmptyInbox receives email only and has no sending endpoint or SMTP credentials. The privacy policy says account email addresses and passwords are not stored and data is not sold or shared for advertising, but the maker records network addresses and identified client software for account-creation attempts. The project is open source under the MIT license, with questions directed to GitHub issues.
For and against
For
- Create a separate disposable address for each task or agent run.
- REST API and MCP access are available on the free plan.
- Reading, listing, and receiving messages are free.
- The web inbox displays extracted codes and links.
- Credits on paid top-ups never expire.
Against
- Messages are automatically deleted after seven days.
- The service has no email-sending endpoint or SMTP credentials.
- Each inbox creation consumes one credit.
- Network addresses and client software are recorded for account-creation attempts.
The verdict
EmptyInbox centers on disposable, task-specific inboxes with API, MCP, and web access. Check the seven-day retention and email-receive-only limitation against your workflow before buying credits.
Who it suits
It suits developers and AI-agent builders who need task-specific inboxes and email verification codes through API or MCP workflows. It is not for sending email, and messages last seven days.
Plans and prices
Free
5 inbox credits · REST API and MCP access · email polling · messages auto-delete after 7 days
Read 7 Oct 2026 · emptyinbox.me
Top-up — Micro
10 inbox credits · $0.10 per inbox
Read 7 Oct 2026 · emptyinbox.me
Top-up — Starter
50 inbox credits · $0.10 per inbox
Read 7 Oct 2026 · emptyinbox.me
Top-up — Standard
200 inbox credits · $0.075 per inbox
Read 7 Oct 2026 · emptyinbox.me
Top-up — Bulk
750 inbox credits · $0.053 per inbox
Read 7 Oct 2026 · emptyinbox.me
On the record
- Developer workflows
- The maker provides guides for Playwright, Cypress, n8n, and LangChain email workflows.emptyinbox.me · read 7 Oct 2026
- Inbox creation
- A new disposable email address can be created for each task or agent run.emptyinbox.me · read 7 Oct 2026
- Integrations
- The maker lists MCP-compatible agents, OpenAI GPT Actions, LangChain, CrewAI, and OpenAPI-compatible frameworks as integration options.emptyinbox.me · read 7 Oct 2026
- Maker
- The product is built, supported, and maintained by the Blockonomics team.emptyinbox.me · read 7 Oct 2026
- Message reading
- Users can poll messages or use the MCP wait_for_message flow to receive email and extract verification codes.emptyinbox.me · read 7 Oct 2026
- Network data
- The maker records the network address and identified client software for every account-creation attempt, and keeps the address associated with a surviving account while it exists.emptyinbox.me · read 7 Oct 2026
- Payment and limits
- Each inbox creation consumes one credit; receiving, listing, and reading messages are free, and quota purchases are non-refundable.emptyinbox.me · read 7 Oct 2026
- Privacy
- The privacy policy says the service does not store email addresses or passwords for accounts, and does not sell or share data for advertising.emptyinbox.me · read 7 Oct 2026
- Purpose
- EmptyInbox provides disposable email inboxes for AI agents and developers through a REST API and MCP server.emptyinbox.me · read 7 Oct 2026
- Retention
- Messages are deleted automatically after seven days.emptyinbox.me · read 7 Oct 2026
- Service limitation
- EmptyInbox receives email only and has no email-sending endpoint or SMTP credentials.emptyinbox.me · read 7 Oct 2026
- Support and source
- The maker directs users to open a GitHub issue for questions and says the project is open source under the MIT license.emptyinbox.me · read 7 Oct 2026
- Web inbox
- The web inbox uses passkey sign-in and displays extracted codes and links alongside messages.emptyinbox.me · read 7 Oct 2026
