Bring Email Testing
to Cline
Learn how to connect MailSlurp to Cline and start using 8 AI agent tools in minutes. Fully managed, enterprise secure, and ready to use without writing a single line of code.
GDPR Free for Subscribers
What is the MailSlurp MCP Server?
Connect your MailSlurp account to any AI agent to automate your email testing and asynchronous message management. This MCP server enables your agent to create virtual inboxes, send and receive emails, and handle complex automation scenarios using long-polling 'wait-for' methods directly from natural language interfaces.
What you can do
- Virtual Inbox Management — Create random or custom email addresses and list all managed inboxes in your account
- Email Automation — Long-poll for the latest incoming email or wait until a specific email count is reached for testing suites
- Message Retrieval — List and inspect messages received by any virtual address, including full HTML and text bodies
- Outbound Capability — Send emails directly from any of your MailSlurp addresses programmatically
- Infrastructure Maintenance — Permanently delete individual messages or entire virtual inboxes via simple commands
- Metadata Inspection — Retrieve detailed technical headers and attachment metadata for any received email
How it works
1. Subscribe to this server
2. Enter your MailSlurp API Key (x-api-key)
3. Start managing your virtual email infrastructure from Claude, Cursor, or any MCP-compatible client
Who is this for?
- QA Engineers — Automate the verification of user registration flows and transactional alerts via natural language
- Developers — Quickly inspect incoming test emails and manage temporary addresses directly from your IDE
- Product Teams — Monitor and audit automated communication paths and email delivery results effortlessly
Built-in capabilities (8)
Create a new random email address
Delete an inbox and its emails
Get complete content for a specific email
List all MailSlurp inboxes
List emails received by an inbox
Requires recipient and content. Send an email using a MailSlurp address
Wait until an inbox has a certain number of emails
Returns the latest one immediately if present. Long-poll for the next incoming email
Why Cline?
Cline operates autonomously inside VS Code. it reads your codebase, plans a strategy, and executes multi-step tasks including MailSlurp tool calls without waiting for prompts between steps. Connect 8 tools through Vinkius and Cline can fetch data, generate code, and commit changes in a single autonomous run.
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Cline operates autonomously. it reads your codebase, plans a strategy, and executes multi-step tasks including MCP tool calls without step-by-step prompts
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Runs inside VS Code, so you get MCP tool access alongside your existing extensions, terminal, and version control in a single window
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Cline can create, edit, and delete files based on MCP tool responses, enabling end-to-end automation from data retrieval to code generation
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Transparent execution: every tool call and file change is shown in Cline's activity log for full visibility and approval before committing
MailSlurp in Cline
MailSlurp and 3,400+ other MCP servers. One platform. One governance layer.
Teams that connect MailSlurp to Cline through Vinkius don't need to source, host, or maintain individual MCP servers. Every tool call runs inside a hardened runtime with credential isolation, DLP, and a signed audit chain.
Raw MCP | Vinkius | |
|---|---|---|
| Server catalog | Find and host yourself | 3,400+ managed |
| Infrastructure | Self-hosted | Sandboxed V8 isolates |
| Credential handling | Plaintext in config | Vault + runtime injection |
| Data loss prevention | None | Configurable DLP policies |
| Kill switch | None | Global instant shutdown |
| Financial circuit breakers | None | Per-server limits + alerts |
| Audit trail | None | Ed25519 signed logs |
| SIEM log streaming | None | Splunk, Datadog, Webhook |
| Honeytokens | None | Canary alerts on leak |
| Custom domains | Not applicable | DNS challenge verified |
| GDPR compliance | Manual effort | Automated purge + export |
Why teams choose Vinkius for MailSlurp in Cline
The MailSlurp MCP Server runs on Vinkius-managed infrastructure inside AWS — a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts. All 8 tools execute in hardened sandboxes optimized for native MCP execution.
Your AI agents in Cline only access the data you authorize, with DLP that blocks sensitive information from ever reaching the model, kill switch for instant shutdown, and up to 60% token savings. Enterprise-grade infrastructure, zero maintenance.
* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure
How Vinkius secures
MailSlurp for Cline
Every tool call from Cline to the MailSlurp MCP Server is protected by DLP redaction, cryptographic audit chains, V8 sandbox isolation, kill switch, and financial circuit breakers.
Frequently asked questions
How do I find my Inbox ID?
Use the list_all_inboxes tool to see a comprehensive list of all your MailSlurp addresses along with their unique IDs.
What is the benefit of the 'wait-for' tools?
They hold the connection until an email arrives, making it easy to test asynchronous processes (like password resets) without writing complex retry loops.
Where do I find my API Key?
Log in to your MailSlurp dashboard and copy the API key from the Home or API Settings section.
How does Cline connect to MCP servers?
Cline reads MCP server configurations from its settings panel in VS Code. Add the server URL and Cline discovers all available tools on initialization.
Can Cline run MCP tools without approval?
By default, Cline asks for confirmation before executing tool calls. You can configure auto-approval rules for trusted servers in the settings.
Does Cline support multiple MCP servers at once?
Yes. Configure as many servers as needed. Cline can use tools from different servers within the same autonomous task execution.
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