Kickbox
Kickbox provides an API for real-time email verification, list cleaning, and quality scoring to ensure email deliverability.
Verdict
Common use cases
- Validate signups before provisioning accounts
- Clean email lists before campaign send
- Flag risky addresses in CRM imports
- Check vendor contacts during onboarding
- Verify support tickets from unknown senders
Integration
- Vendor
- Kickbox
- Category
- other
- Auth
- API_KEY
- Tools
- 1
- Composio slug
kickbox
Tools
- Kickbox Single Verification
Tool to verify a single email address via kickbox. use when you need real-time validation of an individual email before critical workflows.
Setup
Setup guide
- 11. In Switchy, open your workspace settings and navigate to the MCP integrations panel. 2. Select 'Add MCP' and choose Kickbox from the directory. 3. Log in to your Kickbox dashboard at kickbox.com, go to API Settings, and copy your production API key. 4. Paste the key into Switchy's auth prompt and click Connect. 5. Switchy confirms the connection and displays your remaining verification credits. 6. Open any Space, type '@Kickbox verify user@example.com' in the chat, and send. 7. The MCP returns a JSON response with the verdict, reason, and domain metadata. 8. If you see an authentication error, regenerate your API key in Kickbox and reconnect in Switchy.
What teammates see: by default, memories from Kickbox are scoped to the Space (PROJECT visibility) - you can mark any memory PRIVATE or share it ORG-wide.
Works well with
Top models
Compatibility data appears once enough Spaces have used this MCP together with a given model.
How Switchy teams use it
Starter prompts
Verify Campaign List
@Kickbox verify each of these emails and tell me which ones are deliverable: alice@example.com, bob@fake-domain.xyz, carol@company.coOpen in a Space →
Validate New Signup
@Kickbox verify newuser@startup.io and let me know if it's safe to onboard themOpen in a Space →
Check Vendor Contact
@Kickbox verify procurement@vendor-name.com and report the deliverability statusOpen in a Space →
Flag Disposable Addresses
@Kickbox verify support@tempmail.net and tell me if it's a disposable addressOpen in a Space →
Audit CRM Import
@Kickbox verify these five emails from our trade-show leads and flag any that won't deliver: lead1@co.com, lead2@domain.org, lead3@startup.io, lead4@fake.net, lead5@company.bizOpen in a Space →
Example outputs
Illustrative - representative of the model's voice and quality, not literal recordings.
@Kickbox verify the email address john.doe@example-corp.com and tell me if it's safe to send our product launch announcement to this contact.
The email john.doe@example-corp.com returned a deliverable status with a confidence score of 0.98. The domain has valid MX records, the mailbox exists, and no disposable or role-based flags were detected. This address is safe for your product launch send. Note that this is a point-in-time check — mailbox status can change between verification and actual send.
This example shows the core single-verification workflow. Kickbox returns deliverability status, confidence scores, and risk flags (disposable, role-based, etc.). Each verification consumes one API credit, so use this for high-value sends rather than bulk list cleaning. Requires a valid API key with sufficient credit balance.
@Kickbox check support@startup-demo.io — our last three emails bounced and I need to know if this is a real support inbox or a catch-all before escalating to their sales team.
The address support@startup-demo.io is flagged as a role-based account (confidence 0.92) with a catch-all configuration detected on the domain. The mailbox is technically deliverable, but Kickbox recommends caution: catch-all domains accept all addresses without validating individual mailboxes, so delivery success doesn't guarantee a human recipient. Consider reaching out via their sales contact instead.
This example highlights Kickbox's ability to surface role-based and catch-all flags — critical context for deciding whether to send high-priority messages. The MCP surfaces these nuances in plain language, helping you avoid false confidence from a simple 'deliverable' result. Best used when email reliability directly impacts business outcomes.
@Kickbox verify ceo@newclient.co and if it's valid, draft a cold outreach email introducing our API integration services, keeping the tone professional but warm.
The email ceo@newclient.co is deliverable (confidence 0.95) with no risk flags detected. Here's a draft outreach: Subject: Simplify your integrations with [Your Company] Hi [CEO Name], I noticed newclient.co is scaling quickly — congrats on the momentum. We help teams like yours ship API integrations faster with pre-built connectors and monitoring. Would love to share a quick demo if you're open to it. Best, [Your Name] This draft assumes you'll personalize the CEO's name and your company details before sending.
This example pairs Kickbox's verification with AI-generated content, showing how validation can gate downstream workflows. The MCP confirms deliverability before the AI drafts the message, reducing wasted effort on invalid addresses. Remember that verification doesn't guarantee inbox placement — spam filters and recipient preferences still apply.
Use-case deep-dives
When Kickbox saves time on cold email prep
A 3-person sales team scraping leads from LinkedIn needs to validate 40 emails before loading them into their CRM. Kickbox's single-verification tool works here because the list is small and the team wants real-time feedback before committing to a campaign. The MCP lets you pipe each email through validation inside Switchy without switching to Kickbox's dashboard. The trade-off: if you're validating 500+ emails weekly, you'll want Kickbox's bulk API instead—this MCP is built for one-at-a-time checks, not batch jobs. For teams doing manual prospecting at this scale, it's the right call.
Real-time email checks during webinar signups
A 2-person marketing team running quarterly webinars wants to catch typos and fake emails at registration time. Kickbox's MCP fits this workflow because the team can validate each signup as it comes in, flagging bad addresses before they hit the email platform. The single-verification tool is fast enough for real-time use and doesn't require pre-building a list. The boundary: if your event draws 1,000+ signups in an hour, the one-by-one approach will bottleneck—you'd need Kickbox's batch endpoint or a different architecture. For teams hosting smaller events (under 200 attendees), this keeps your list clean without manual cleanup later.
Verifying sender emails before escalating support cases
A 5-person support team gets 30 tickets daily, some from throwaway or mistyped email addresses. Before escalating a case to engineering, the team wants to confirm the sender's email is valid and deliverable. Kickbox's MCP lets support agents validate the address in Switchy while reading the ticket, without opening a separate tool. The single-verification scope is enough because they're checking one email per escalation, not bulk-processing the queue. The limit: if you're triaging hundreds of tickets daily, you'll want automated validation at intake, not manual checks. For small teams doing selective escalation, this adds a verification step without slowing down the workflow.
Frequently asked
What does the Kickbox MCP do in Switchy?
It verifies email addresses in real time before your team sends messages or adds contacts to workflows. The MCP calls Kickbox's validation API to check deliverability, catch typos, and flag disposable addresses. You get a clean yes/no answer on whether an email will bounce, which prevents wasted outreach and protects your sender reputation.
Do I need a Kickbox account to use this MCP?
Yes. You need an active Kickbox subscription and an API key from your account dashboard. Paste that key into Switchy when you connect the MCP. Each verification consumes one credit from your Kickbox plan, so monitor usage if you're on a metered tier. No OAuth flow — just the API key.
Can the Kickbox MCP verify bulk email lists?
No. This MCP only validates one email at a time, which makes it ideal for live workflows where a human or agent needs instant feedback. If you want to scrub a CSV of 10,000 addresses, upload that file directly to Kickbox's web dashboard or use their bulk API outside Switchy.
Why use the MCP instead of calling Kickbox's API directly?
The MCP wraps the API call in a tool your AI agents can invoke mid-conversation without writing code. If an agent is drafting an email and wants to confirm the recipient address is valid, it just calls the tool. You avoid building custom integrations or teaching non-technical teammates how to use cURL.
Who on the team should connect the Kickbox MCP?
Whoever owns your Kickbox account and has access to the API key. That's usually someone in sales ops, marketing ops, or IT. Once connected, any Switchy workspace member can use the verification tool in their agent chats. Usage counts against your Kickbox plan, not Switchy's limits.