EmptyInbox vs Maildrop
EmptyInbox
emptyinbox.meMaildrop
maildrop.ccSide by side
| Figure | EmptyInbox | Maildrop |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Linux | Yes | — |
| API | Yes | Yes |
| Plans published | 5 | 1 |
| Spec score · Temporary email services | 8.4 (#12) | 7.6 (#26) |
| Spec score · Temporary Email Services | 8.4 (#9) | 7.6 (#21) |
| Maker | The product is built, supported, and maintained by the Blockonomics team. | Maildrop says it was created in California by Heluna. |
| Purpose | EmptyInbox provides disposable email inboxes for AI agents and developers through a REST API and MCP server. | The service is intended for receiving email when users do not want to share their real address, including one-off purchases and website registrations. |
Plans
EmptyInbox
- FreeFree
- Top-up — Micro$1, paid once
- Top-up — Starter$5, paid once
- Top-up — Standard$15, paid once
- Top-up — Bulk$40, paid once
In their own words
EmptyInbox
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 received through the MCP wait_for_message flow, which can extract verification codes. The web inbox uses passkey sign-in and displays extracted codes and links alongside messages. Each inbox creation uses one credit; receiving, listing and reading messages are free. Messages are deleted automatically after seven days. EmptyInbox receives email only and has no sending endpoint or SMTP credentials. Listed integrations include MCP-compatible agents, OpenAI GPT Actions, LangChain, CrewAI and OpenAPI-compatible frameworks; workflow guides cover Playwright, Cypress, n8n and LangChain. The free plan includes five inbox credits and REST API and MCP access. One-time top-ups start at 1.00 USD for 10 credits, payable by Bitcoin or USDT. The project is open source under the MIT license, and questions go through GitHub issues.
Maildrop
Maildrop provides temporary disposable email inboxes for receiving messages without sharing a real address. It requires no signup or password and supports custom addresses, making it suitable for one-off purchases and website registrations. Developers can use a GraphQL API to retrieve mailbox listings and messages, delete messages, and automate email testing. Incoming mail passes through Heluna antispam filters, which Maildrop says reduce spam by more than 90%. Every inbox is public, so other users can read its messages, and Maildrop cannot send email. Plain-text and HTML messages under 500k are accepted; attachments are removed. An inbox holds at most 10 messages, and inactive inboxes may be cleared after 24 hours or sooner. Mail servers not previously seen may be greylisted, delaying delivery by at least 15 minutes and sometimes up to an hour. Maildrop says it logs email and web connections and does not promise complete anonymity. The service is free and available through its web interface and API.