Give your agent an inbox it can only read.
Email is where useful updates still arrive. ZeroMail gives your agent a safe place to receive codes, receipts, newsletters, store deals, alerts, price changes, and more.
Create the inbox first. If you do not already have a wallet, your agent can create an unfunded one for free, then upgrade it through Zero later when you want a nicer address or forwarding.
Receive-only by design — safe to share, because it can never send.
The free setup needs only a local wallet signature. Zero funding comes later, only for vanity addresses or forwarding.
Why receive-only
Agents don't need to send. They need to listen.
Email is still where the outside world sends important things: login codes, receipts, newsletters, sale notices, shipping updates, alerts, and competitor changes. ZeroMail gives your agent that inbox without giving it a way to send mail.
What your agent can receive
- 2FA codes, confirmations, resets, and receipts
- Newsletters, digests, launches, and market updates
- Store deals, price drops, and back-in-stock notices
- Alerts, status changes, invoices, and routine updates
And the parts it can skip
- No send, compose, or reply to set up
- No deliverability, SPF/DKIM, or sender reputation
- Nothing the agent can be tricked into sending
- Safe to hand out — it can only ever receive
Use cases
Give your agent email it can watch.
ZeroMail is useful anywhere you want an agent to notice new mail, pull out the important parts, and kick off the next step.
Newsletter monitoring
Subscribe an agent to product, market, policy, or research newsletters and turn each issue into summaries, tags, and follow-up tasks.
Store deal inboxes
Give your agent a dedicated address for store emails so it can spot discounts, coupon codes, loyalty offers, and shipping updates.
Competitive monitoring
Track competitor newsletters, launch announcements, pricing emails, changelogs, webinars, and customer-facing updates in one place.
Price & availability tracking
Route back-in-stock, waitlist, renewal, and price-change emails into agents that can compare, notify, or purchase when conditions match.
Alerting pipelines
Turn alerts from SaaS tools, banks, vendors, infrastructure, or support systems into trusted webhook calls for your agent.
Receipts & account state
Keep a clean record of receipts, invoices, renewal notices, verification emails, password resets, and account status changes.
How it works
From inbox request to usable address.
Start with the email address your agent needs. Wallet setup happens inside that same flow, then the agent can read new mail through the API or receive it by webhook.
Create the inbox
Ask for a ZeroMail address. That is the main action; wallet setup is part of getting it.
Create or connect a wallet
If the user does not have one yet, the agent creates a fresh unfunded EVM wallet locally and saves the key securely.
Verify once
The wallet signs a short message. ZeroMail uses that signature to create the inbox and issue an API token.
Read mail
List, get, and search messages with filters and pagination. Free, with no per-read metering.
Or subscribe
New mail pushed via signed webhooks or SSE — ideal for alerts, monitoring, and code relay.
Features
An inbox made for agents.
ZeroMail keeps the useful part of email — receiving and reading — and leaves out the risky part: sending.
Made for incoming mail
Codes, confirmations, newsletters, receipts, alerts, and deal emails all arrive by email. ZeroMail lets agents read them without adding send risk.
Wallet-native identity
Create an unfunded inbox wallet or connect an existing one. A signature gives your agent a short-lived token. No email password, no send permission.
Push when it matters
Subscribe to signed webhooks or SSE and get mail the instant it arrives. No polling.
List, get & search
A simple read API with filters and pagination. Your agent gets structured message data it can classify, summarize, and act on.
Use the address you want
Start with the free address created for your wallet. Later, choose something easier to share, like name@withzero.com, or forward mail from an address you already use.
Ephemeral by default
Mail sticks around for 30 days by default: long enough to process, short enough to avoid becoming a permanent archive.
The API
Read new mail in one request.
Point any HTTP client at api.withzero.com. Authenticate with a signed token, then list, get, search, or subscribe. Unlimited reads, clean JSON.
There is no send API to disable or misconfigure. ZeroMail was built to receive only.
- Cursor pagination — stable, resumable list and search across incoming mail.
- Wallet auth — a signature gives your agent a short-lived token; the private key stays local.
- Zero upgrade path — fund or import the same wallet through Zero when you want paid address features.
See the docs for auth, exact response bodies, and the current v1 reference.
One high-frequency use case
OTP & 2FA relay, the instant the code lands.
Agents constantly hit verification walls — sign-ups, logins, resets. The code lands in a wallet-owned inbox and is pushed to your agent over webhook or SSE, parsed and ready.
The same push path works for any email-triggered workflow: alerts, newsletters, store updates, receipts, competitor changes, or anything else your agent should notice.
Get early accessAddresses
Use the free address now. Pick a nicer one later.
Every inbox wallet gets an address automatically. Use it for codes, receipts, alerts, newsletters, store deals, and anything else your agent should watch. If you want an address that is easier to remember or share, you can add one later.
Included address
Free to use
An inbox created for a local wallet, ready in seconds. Good for codes, receipts, alerts, newsletters, store emails, and monitoring feeds.
- An email address for your wallet
- Free reads, search, and API access
- Webhooks + SSE push
- 30 days of message history
Nicer address
$1 / month, in USDC
Choose an address that looks better, is easier to remember, or is dedicated to a specific workflow. The API is still free.
- Everything in the free address
- A custom handle like name@withzero.com
- Forward newsletters, deals, alerts, or receipts
- Bring your own domain via MX
The API is free either way. The monthly charge only applies if you want the nicer address. Get started.
Early access
Give your agent an inbox in seconds.
ZeroMail is in active development. Tell us what email workflows you want your agent to monitor — we'll get you in early.
No public signup yet · receive-only, always