How to Use the Modulr MCP in Mastra AI

Build self-healing, multi-step payment workflows with Mastra AI and the Modulr MCP Server.

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Connect Modulr MCP to Mastra AI

Create your Vinkius account to connect Modulr to Mastra AI and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Modulr with Mastra AI

Ask AI about this MCP

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Claude

Perplexity

Automated retry loops for failed payouts

Payments fail, but your system shouldn't. Mastra AI lets you build workflows that catch failures when running `modulr_create_payment` and automatically retry with exponential backoff. If a SEPA payout bounces, the workflow engine catches the error. It can query `modulr_get_accounts` to check liquidity before attempting the transfer again.

Human-in-the-loop approvals for large transfers

You don't want an autonomous agent moving big money without eyes on it. You can configure Mastra AI to require manual approval before executing `modulr_create_payment` or setting up a new recipient with `modulr_create_beneficiary`. The workflow pauses, alerts your team on Slack, and waits for a green light. Once approved, the Modulr MCP Server safely fires the API call.

Conditional ledger routing with Mastra AI

Build workflows that branch based on live financial data. Your agent can run `modulr_get_customers` to verify an entity, then decide whether to invoke `modulr_create_account` or flag the profile for manual compliance review. Mastra AI coordinates these decisions natively. It parses the raw JSON responses from the Modulr MCP Server and routes the execution path without complex custom code.

Setup guide

Set up Modulr MCP in Mastra AI

Prerequisites

Node.js 18+ and a TypeScript project
@mastra/mcp + @mastra/core packages
Active Vinkius subscription with a valid endpoint token

1

Install dependencies
Run npm install @mastra/mcp @mastra/core plus your preferred model provider (e.g. @ai-sdk/openai).
2

Configure the MCPClient
Create an MCPClient with your Vinkius endpoint as a URL object. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Discover and inject tools
Call mcpClient.listTools() and spread the result into your agent's tools object. All Modulr tools become native Mastra tools.
4

Run with any model
Swap openai("gpt-4o") for any AI SDK-compatible provider. Call agent.generate() and the agent routes tool calls through MCP automatically.

agent.ts

import { MCPClient } from "@mastra/mcp";
import { Agent } from "@mastra/core/agent";
import { openai } from "@ai-sdk/openai";

const mcpClient = new MCPClient({
  id: "modulr-mcp-client",
  servers: {
    "modulr-mcp": {
      url: new URL(
        "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
      ),
    },
  },
});

const agent = new Agent({
  name: "Modulr Agent",
  model: openai("gpt-4o"),
  instructions: "You have access to Modulr tools.",
  tools: {
    ...(await mcpClient.listTools()),
  },
});

const result = await agent.generate(
  "List recent Modulr transactions"
);
console.log(result.text);

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Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Modulr Finance. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

Why Choose Vinkius

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Common questions about Modulr MCP in Mastra AI

You initialize the Modulr MCP Server client and register its tools directly inside your Mastra agent. The workflow engine then treats tools like `modulr_create_payment` as executable steps that can trigger sequentially or conditionally.

Yes, you can use the approval setting on your agent. This stops the agent from executing `modulr_create_payment` until an admin explicitly signs off on the transaction.

The workflow engine uses its built-in retry logic to handle transient network errors. If `modulr_get_transactions` times out, Mastra AI will back off and try again without crashing the entire agent session.

No, the managed MCP Server handles all HMAC-SHA256 signature generation. Your agent simply passes standard arguments to tools like `modulr_create_account` and the server handles the security handshake.

Your routing numbers, account balances, and customer IDs are isolated in Vinkius's zero-trust runtime. Mastra AI only receives the raw transaction data required to execute the active workflow step.

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