dev.zerodropPublished by zerodrop.devv0.4.0Updated Nov 7, 2026
Disposable email inboxes for AI agents — OTPs and magic links auto-extracted. No signup to try.
The publisher's own server: drop.media
ZeroDrop's local MCP server, published by zerodrop.dev; no sign-in required; STDIO; 3 tools.
No AI overview yet: these facts come from the registry entry and the server itself.
Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.
Follow the launch instructions in the repository.
Email verification for AI agents — an MCP server that gives Claude, Cursor, Claude Code, and any MCP client disposable email inboxes with auto-extracted OTPs and magic links.
Your agent tests your app's signup. The app sends a verification code. Without an inbox it can read, the agent is stuck. With zerodrop-mcp:
No Docker. No SMTP. No signup to try: without an API key, one sender can reach 5 different inboxes a day. A free key lifts that.
Add to claude_desktop_config.json:
Add to .cursor/mcp.json (project) or ~/.cursor/mcp.json (global):
generate_inboxCreates a disposable email address. Local and instant — no network request.
Returns the inbox address. With a key from zerodrop.dev/keys in ZERODROP_API_KEY, the name starts with your key's prefix (k7x2-myapp-swift-x7k29ab) and only your key can read it. Without one, a prefix whose part before the first hyphen is four letters and digits, at least one of each (app1, app1-web), goes after the adjective instead (swift-app1-web-x7k29ab), so the inbox can't fall under someone's account.
wait_for_emailBlocks until a matching email arrives, then returns it with the OTP and magic link already extracted — the agent never parses HTML or regexes a body.
Returns:
Without an API key, one sender can reach 5 different inboxes a day. If ZeroDrop held the email because its sender passed that, wait_for_email returns at once (0.3.0 or later) with an error instead of waiting for the timeout:
check_inboxNon-blocking snapshot of the inbox — recent emails with extracted fields, or an empty list. A notice that ZeroDrop held an email appears as { "held": true, "received_at": "…", "message": "…" }.
Emails sent to a generated inbox are caught at Cloudflare's edge by ZeroDrop's open-source worker. OTPs and magic links are extracted at the edge before your agent reads them. On the free tier, an inbox is deleted 30 minutes after its latest email.
Environment variables (set in your MCP client config):
If you're generating test code rather than driving flows live, use the SDKs directly:
npm · PyPI · Go · RubyGems · Packagist · JitPack · GitHub Action
AI coding assistant context: docs.zerodrop.dev/ai-coding
ZERODROP_BASE_URL (zerodrop.dev by default) — nothing elseMIT — zerodrop.dev
Source: README.md at commit f0126f3
Generate a disposable email inbox for testing signups, OTP verification, magic links, and password resets. Instant and local — no network request. Use the returned address wherever an email is required, then call wait_for_email to read what arrives. Free tier: 30-minute retention, no signup needed. With a key from zerodrop.dev/keys in ZERODROP_API_KEY, the name starts with the key's prefix and only that key can read the inbox.
prefixWait for an email to arrive in a ZeroDrop inbox and return it with the OTP and magic link already extracted — no parsing needed. Blocks until an email matching the filters arrives or the timeout is reached. If ZeroDrop held the email instead (without an API key, one sender can reach only a few different inboxes a day), returns at once with error "held" and the reason. Use after triggering a signup, login, or password-reset flow.
inboxrequiredrequire_otpfrom_containstimeout_secondssubject_containsrequire_magic_linkCheck a ZeroDrop inbox right now without waiting. Returns the most recent emails with OTPs and magic links already extracted, or an empty list if nothing has arrived yet. A notice that ZeroDrop held an email is listed as { held: true, message }.
inboxrequired90% of the applicable checks met
How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.
Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.
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Agent: generate_inbox() → [email protected]
Agent: [fills the signup form with that address]
Agent: wait_for_email(inbox, require_otp: true) → { "otp": "847291", "subject": "Verify your email", ... }
Agent: [enters 847291 — flow complete]claude mcp add zerodrop -- npx -y zerodrop-mcp{ "mcpServers": { "zerodrop": { "command": "npx", "args": ["-y", "zerodrop-mcp"] } }}{ "mcpServers": { "zerodrop": { "command": "npx", "args": ["-y", "zerodrop-mcp"] } }}{ "from": "[email protected]", "subject": "Your verification code", "received_at": "2026-07-18T12:34:56Z", "otp": "847291", "magic_link": null, "body_preview": "Your code is: 847291..."}{ "error": "held", "message": "ZeroDrop held an email from yourapp.com to this inbox. The email was not stored. …" }{ "mcpServers": { "zerodrop": { "command": "npx", "args": ["-y", "zerodrop-mcp"], "env": { "ZERODROP_API_KEY": "your-key" } } }}