How do I get my Poplar Access Token?

Log in to your Poplar account and navigate to the **API Settings** or **Developer** section. You will find your Access Token there. Use a Test Token for development and a Production Token for live mailings.

Can I standardize non-US addresses?

No, Poplar's address standardization service is specifically designed for US addresses only. For international mailing, ensure your addresses are pre-formatted correctly.

How can I check if a mailer has been delivered?

Use the `get_mailer_status` tool with the unique mailer ID. It will return the current status, including production phases and the final USPS delivery confirmation when available.

Is the integration secure for customer addresses?

Absolutely. The integration uses official Poplar Bearer tokens over HTTPS. Your credentials and customer data are encrypted and stored securely within the Vinkius Cloud infrastructure.

Poplar MCP Server for Claude Desktop 11 tools — connect in under 2 minutes

Name: Poplar
Availability: InStock
Author: Vinkius

modelcontextprotocol.io/quickstart/user

Built by Vinkius GDPR 11 Tools IDE

Claude Desktop is Anthropic's native application for interacting with Claude AI models on macOS and Windows. It was the first consumer application to ship with built-in MCP support, making it the reference implementation for the Model Context Protocol standard.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

RecommendedModern Approach — Zero Configuration

Vinkius Desktop App

The modern way to manage MCP Servers — no config files, no terminal commands. Install Poplar and 2,500+ MCP Servers from a single visual interface.

Download Free Open SourceNo signup required

Classic Setup·json

{
  "mcpServers": {
    "poplar": {
      // Your Vinkius token. get it at cloud.vinkius.com
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Fully ManagedVinkius Servers

60%Token savings

High SecurityEnterprise-grade

IAMAccess control

EU AI ActCompliant

DLPData protection

V8 IsolateSandboxed

Ed25519Audit chain

<40msKill switch

Stream every event to Splunk, Datadog, or your own webhook in real-time

* 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

About Poplar MCP Server

Connect your Poplar account to any AI agent and take full control of your programmatic direct mail and physical outreach through natural conversation.

Claude Desktop is the definitive way to connect Poplar to your AI workflow. Add Vinkius Edge URL to your config, restart the app, and Claude immediately exposes all 11 tools in the chat interface. ask a question, Claude calls the right tool, and you see the answer. Zero code, zero context switching.

What you can do

Trigger Mailers — Automatically send physical postcards or letters by providing a campaign ID and recipient details.
Address Standardization — Clean and verify US mailing addresses using Poplar's specialized standardization service.
Audience Management — List all mailing audiences and add new members via email or physical address.
Suppression Control — Add recipients to the global 'Do Not Mail' list to manage opt-outs and compliance.
Campaign Visibility — List all active direct mail campaigns and inspect available creatives.
Delivery Tracking — Monitor the production and delivery status of specific mail pieces in real-time.
Attribution Reporting — Submit customer orders back to Poplar to track the ROI of your physical mail campaigns.

The Poplar MCP Server exposes 11 tools through the Vinkius. Connect it to Claude Desktop in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect Poplar to Claude Desktop via MCP

Follow these steps to integrate the Poplar MCP Server with Claude Desktop.

Open Claude Desktop Settings

Go to Settings → Developer → Edit Config to open claude_desktop_config.json

Add the MCP Server

Paste the configuration above into the mcpServers section

Restart Claude Desktop

Close and reopen Claude Desktop to load the new server

Start using Poplar

Look for the 🔌 icon in the chat. your 11 tools are now available

Why Use Claude Desktop with the Poplar MCP Server

Claude Desktop by Anthropic provides unique advantages when paired with Poplar through the Model Context Protocol.

Claude Desktop is the reference MCP client. it was designed alongside the protocol itself, ensuring the most complete and stable MCP implementation available

Zero-code configuration: add a server URL to a JSON file and Claude instantly discovers and exposes all available tools in the chat interface

Claude's extended thinking capability lets it reason through multi-step tool usage, chaining multiple API calls to answer complex questions

Enterprise-grade security with local config storage. your tokens never leave your machine, and connections go directly to Vinkius Edge network

Poplar + Claude Desktop Use Cases

Practical scenarios where Claude Desktop combined with the Poplar MCP Server delivers measurable value.

Interactive data exploration: ask Claude to query DNS records, look up WHOIS data, and cross-reference results in a single conversation

Ad-hoc security audits: type a domain name and let Claude enumerate subdomains, check DNS history, and flag configuration anomalies. all through natural language

Executive briefings: generate comprehensive domain intelligence reports by asking Claude to compile findings into a formatted summary

Learning and training: new team members can explore API capabilities conversationally without needing to read documentation

Poplar MCP Tools for Claude Desktop (11)

These 11 tools become available when you connect Poplar to Claude Desktop via MCP:

add_to_audience

Add a recipient to a specific audience list

add_to_suppression_list

Add a recipient to the global "Do Not Mail" list

get_api_profile

Get information about the authenticated account

get_mailer_status

Check the production and delivery status of a specific mailer

list_audiences

List all mailing audiences in your account

list_billing_history

List account billing and invoice data

list_mail_creatives

List all uploaded mailer designs/creatives

list_marketing_campaigns

List all direct mail campaigns

report_transaction

Report a customer order back to Poplar for attribution tracking

standardize_us_address

Pass fields like address_line1, city, state, postal_code. Clean and standardize a US mailing address

trigger_physical_mailer

Requires "campaign_id" and "recipient_json" (address details). Optional "merge_tags_json" for dynamic content. Trigger a physical mailer (postcard, letter) for a campaign

Example Prompts for Poplar in Claude Desktop

Ready-to-use prompts you can give your Claude Desktop agent to start working with Poplar immediately.

"Send a postcard to Jane Doe using campaign ID 'camp_123'."

"Standardize this address: 123 main st, nyc, ny 10001."

"List all active audiences and find 'Holiday VIPs'."

Troubleshooting Poplar MCP Server with Claude Desktop

Common issues when connecting Poplar to Claude Desktop through the Vinkius, and how to resolve them.

Server not appearing after restart

Ensure the JSON is valid (no trailing commas). Check the file path: ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\\Claude\\ (Windows).

Authentication error

Verify your Vinkius token is correct. Go to cloud.vinkius.com to regenerate it if needed.

Tools not showing in chat

Click the 🔌 icon at the bottom of the chat input. If it shows 0 tools, the server may still be connecting. wait a few seconds.

Poplar + Claude Desktop FAQ

Common questions about integrating Poplar MCP Server with Claude Desktop.

How does Claude Desktop discover MCP tools?

When Claude Desktop starts, it reads the claude_desktop_config.json file and connects to each configured MCP server. It calls the tools/list endpoint to fetch the schema for every available tool, then surfaces them as clickable options in the chat interface via the 🔌 icon.

What happens if the MCP server is temporarily unavailable?

Claude Desktop handles disconnections gracefully. if the server is unreachable at startup, the tools simply won't appear. Once the server becomes available again, restarting Claude Desktop will re-establish the connection. There is no timeout penalty or error loop.

Can I connect multiple MCP servers simultaneously?

Yes. You can add as many servers as you need in the mcpServers section of the config file. Each server appears as a separate tool provider, and Claude can use tools from multiple servers in a single conversation turn.

Is there a limit on the number of tools per server?

Claude Desktop can handle hundreds of tools per server. However, for optimal LLM performance, Vinkius servers are designed to expose focused, well-documented tool sets rather than overwhelming the model with too many options.

Does Claude Desktop support Streamable HTTP transport?

Yes. Claude Desktop supports both SSE (Server-Sent Events) and the newer Streamable HTTP transport that Vinkius uses. Simply provide the server URL. Claude auto-negotiates the transport protocol.