EmptyInbox vs Temp Mail API
EmptyInbox
emptyinbox.me
Temp Mail API
docs.temp-mail.ioSide by side
| Figure | EmptyInbox | Temp Mail API |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Linux | Yes | — |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Plans published | 5 | 1 |
| Spec score · Temporary email services | 8.4 (#12) | 6.9 (#43) |
| Spec score · Temporary Email Services | 8.4 (#9) | 7.2 (#29) |
| Integrations | The maker lists MCP-compatible agents, OpenAI GPT Actions, LangChain, CrewAI, and OpenAPI-compatible frameworks as integration options. | The maker lists email testing and CI/CD use cases, naming Playwright, GitHub Actions, Jenkins, and GitLab CI. |
| Purpose | EmptyInbox provides disposable email inboxes for AI agents and developers through a REST API and MCP server. | The API creates and manages temporary email addresses and lets users retrieve incoming messages programmatically. |
| Retention | Messages are deleted automatically after seven days. | API email addresses last up to 30 days, after which the emails are automatically deleted. |
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.
Temp Mail API
Temp Mail API has no write-up on Specifiction yet; its figures are above.