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SPECIFICTION
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EmptyInbox

emptyinbox.me

Free plan WebLinuxAPI
Visit emptyinbox.me
Spec score 8.4 #12 of 44 in Temporary email services

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 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.

Spec sheet

Purpose
EmptyInbox provides disposable email inboxes for AI agents and developers through a REST API and MCP server.Read 7 Oct 2026 · emptyinbox.me
Integrations
The maker lists MCP-compatible agents, OpenAI GPT Actions, LangChain, CrewAI, and OpenAPI-compatible frameworks as integration options.Read 7 Oct 2026 · emptyinbox.me
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.Read 7 Oct 2026 · emptyinbox.me
Maker
The product is built, supported, and maintained by the Blockonomics team.Read 7 Oct 2026 · emptyinbox.me
Developer workflows
The maker provides guides for Playwright, Cypress, n8n, and LangChain email workflows.Read 7 Oct 2026 · emptyinbox.me
Inbox creation
A new disposable email address can be created for each task or agent run.Read 7 Oct 2026 · emptyinbox.me
Message reading
Users can poll messages or use the MCP wait_for_message flow to receive email and extract verification codes.Read 7 Oct 2026 · emptyinbox.me
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.Read 7 Oct 2026 · emptyinbox.me
Payment and limits
Each inbox creation consumes one credit; receiving, listing, and reading messages are free, and quota purchases are non-refundable.Read 7 Oct 2026 · emptyinbox.me
Retention
Messages are deleted automatically after seven days.Read 7 Oct 2026 · emptyinbox.me
Service limitation
EmptyInbox receives email only and has no email-sending endpoint or SMTP credentials.Read 7 Oct 2026 · emptyinbox.me
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.Read 7 Oct 2026 · emptyinbox.me
Web inbox
The web inbox uses passkey sign-in and displays extracted codes and links alongside messages.Read 7 Oct 2026 · emptyinbox.me

Plans and prices

Free Free Forever 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 $1, paid once Bitcoin or USDT; credits never expire 10 inbox credits · $0.10 per inbox Read 7 Oct 2026 · emptyinbox.me
Top-up — Starter $5, paid once Bitcoin or USDT; credits never expire 50 inbox credits · $0.10 per inbox Read 7 Oct 2026 · emptyinbox.me
Top-up — Standard $15, paid once Bitcoin or USDT; credits never expire 200 inbox credits · $0.075 per inbox Read 7 Oct 2026 · emptyinbox.me
Top-up — Bulk $40, paid once Bitcoin or USDT; credits never expire 750 inbox credits · $0.053 per inbox Read 7 Oct 2026 · emptyinbox.me

Every EmptyInbox plan and price →

Strong points and limits

Strong points

  • Create a separate inbox for each task or agent run.
  • MCP flow can receive messages and extract verification codes.
  • Receiving, listing and reading messages are free.
  • Free plan includes five inbox credits and API access.
  • Web inbox displays extracted codes and links.

Limits

  • Messages are deleted after seven days.
  • Each inbox creation consumes one credit.
  • No email-sending endpoint or SMTP credentials.
  • Inbox protection is listed as none.

Who it suits

It suits developers and AI-agent builders who need disposable addresses to receive messages or verification codes. It is not for workflows that need to send email.

Verdict

EmptyInbox specifies its inbox workflow, integrations, retention period and credit charges. The seven-day deletion window and receive-only service are important constraints to consider.

Where Specifiction places it

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