Bring Card Issuing
to Claude Desktop
Learn how to connect Marqeta to Claude Desktop and start using 31 AI agent tools in minutes. Fully managed, enterprise secure, and ready to use without writing a single line of code.
GDPR Free for SubscribersCompatible with every major AI agent and IDE
Gemini
What is the Marqeta MCP Server?
Connect your Marqeta account to any AI agent to manage your card issuing infrastructure through natural conversation. This server provides comprehensive tools for managing the entire lifecycle of card programs.
What you can do
- User & Business Management — Create and retrieve individual users or business entities to act as account holders.
- Card Issuance — Create physical or virtual payment cards and manage card products that define spending behaviors.
- Funding & GPA Orders — Move funds into account holder General Purpose Accounts (GPA) and manage ACH funding sources.
- Inventory & Retrieval — List users, fetch specific card details, and audit all cards associated with a specific user token.
- Configuration — Define card products with specific start dates and names to control your issuing environment.
How it works
- Subscribe to this server
- Enter your Marqeta Application Token and Admin Access Token
- Provide your Base URL (Sandbox or Production)
- Start issuing cards and managing fintech workflows from your MCP-compatible client
Built-in capabilities (31)
Create an ACH funding source
Create an authorization control
Create a new Marqeta business
Create a new Marqeta card
Create a new Marqeta card product
g., ACTIVE, SUSPENDED, TERMINATED). Create a card transition
g., to reverse a deposit). Create a direct deposit transition
Create a GPA order to fund an account
Create a payment card funding source
Create a PIN control token
Create a program funding source
Create a new Marqeta user
g., ACTIVE, SUSPENDED, CLOSED). Create a user transition
Create a velocity control
Create a webhook
Retrieve balances for a user or business
Retrieve a Marqeta business by token
Retrieve a Marqeta card by token
Retrieve a direct deposit record
Retrieve a Marqeta user by token
List all cards for a specific user
List Marqeta users
Perform KYC verification for a user
Ping a webhook
Provision a card for Apple Pay
Provision a card for Google Pay
Reveal a card PIN
Simulate an authorization
Simulate a clearing transaction
Simulate a reversal
Set or update a card PIN
Why Claude Desktop?
Claude Desktop is the definitive way to connect Marqeta to your AI workflow. Add Vinkius Edge URL to your config, restart the app, and Claude immediately exposes all 31 tools in the chat interface. ask a question, Claude calls the right tool, and you see the answer. Zero code, zero context switching.
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Claude Desktop is the reference MCP client. it was designed alongside the protocol itself, ensuring the most complete and stable MCP implementation available
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Zero-code configuration: add a server URL to a JSON file and Claude instantly discovers and exposes all available tools in the chat interface
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Claude's extended thinking capability lets it reason through multi-step tool usage, chaining multiple API calls to answer complex questions
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Enterprise-grade security with local config storage. your tokens never leave your machine, and connections go directly to Vinkius Edge network
Marqeta in Claude Desktop
Marqeta and 4,000+ other MCP servers. One platform. One governance layer.
Teams that connect Marqeta to Claude Desktop 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 | 4,000+ 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 Marqeta in Claude Desktop
The Marqeta 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 31 tools execute in hardened sandboxes optimized for native MCP execution.
Your AI agents in Claude Desktop 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
Marqeta for Claude Desktop
Every tool call from Claude Desktop to the Marqeta MCP Server is protected by DLP redaction, cryptographic audit chains, V8 sandbox isolation, kill switch, and financial circuit breakers.
Frequently asked questions
How can I see all cards belonging to a specific person?
Use the list_cards_by_user tool by providing the user's unique token. The agent will return a list of all physical and virtual cards associated with that account holder.
How do I add money to a user's card account?
You can use the create_gpa_order tool. You'll need the user token, the amount, currency code, and a funding source token to move funds into their General Purpose Account.
Is it possible to register a legal entity instead of an individual?
Yes, use the create_business tool to create a business entity. You can then retrieve its details using the get_business tool with the business token.
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.
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.
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