Now in beta

Private email addresses
that clean up after themselves

Create a disposable email address via API. Receive exactly one email. Retrieve it. The address vanishes. Zero retention, zero maintenance, total isolation. For test suites, AI agents, automations, or whatever you're building next.

Get your API key Read the docs

A building block for anything that needs email

One address. One email. Then it is gone. What you build with it is up to you.

One-Shot by Design

Each address receives exactly one email, then auto-deletes. No shared state, no cleanup, no retention, no content analysis. Privacy and isolation by default.

Fast Delivery

Emails are available via API within seconds. SDKs include wait_for_email() with built-in exponential backoff. No manual polling needed.

Any Language, Any Stack

Native SDKs for Python, Go, Ruby, JavaScript, and Java. CLI for scripting. MCP server for AI agents. REST API for everything else.

Create an address. Get the email. Done.

Drop it into a test suite, a deployment script, an AI agent workflow, a CLI tool — anywhere code needs to receive an email.

from oneshot import OneShotClient
client = OneShotClient(api_key="osm_live_...")
inbox = client.create()
# ... your code sends an email to inbox.address ...
email = client.wait_for_email(inbox.id)
print(email.subject)
print(email.text_body)

Coming soon

One-shot sending

Send a single email from a throwaway address — test your app's inbound email processing with receipts, notifications, invoices, OTP codes. DKIM/SPF/DMARC authenticated. Launching in v2.

AI Agent

Sign me up for an account on staging.myapp.com using a throwaway email. Verify the email, then tell me the confirmation code.

Using oneshot_create_address

Using browser_fill_form

Using oneshot_wait_for_email

Done! I signed up with k7xm2p@in.oneshotemail.com and received the verification email. Your confirmation code is 482-913. The throwaway address has been deleted.

MCP Server

Give your AI agent an inbox

OneShotMail ships as an MCP server. Claude, GPT, and other AI agents can create disposable email addresses, receive verification emails, and extract information — all with natural language.