EmptyInbox vs TempInbox

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.

TempInbox is a free web service for temporary email inboxes without signup. It is intended for verification messages, trials and low-trust registrations, with developers, QA teams and privacy-conscious users among its stated audiences. One browser can hold up to three inboxes, and access is saved in that browser. The Free plan costs nothing and has no 10-minute timer, but inbox lifetime is custom. Messages may be soft-deleted and later removed in scheduled batches, so long-term storage is not guaranteed. The browser interface lets users view, download and clear messages, including attachments. Hosted TempInbox is receive-only: it has no sending, replies or forwarding, and no supported public API or SDK. It works in Android and iPhone mobile browsers without an app. The maker describes privacy and security as best-effort and warns that messages may be exposed, delayed, removed or inaccessible. It advises against banking, medical, legal, payroll and other high-stakes accounts requiring lasting confidentiality.