How to Use the Numbers API MCP in Mastra AI

Build reliable agent workflows in Mastra AI with automated error handling for all your numerical data lookups.

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Connect Numbers API MCP to Mastra AI

Create your Vinkius account to connect Numbers API 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 Numbers API with Mastra AI

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Claude

Perplexity

Automated math fact workflows

Chain `get_math_fact` into your agent logic to provide verified calculations without manual input. Mastra AI handles the execution flow, ensuring your agent gets the right number every time. If the request fails, the framework automatically triggers your retry logic. It’s built for complex processes where you can't afford a single missing fact to break the chain.

Conditional branching for history

Use `get_year_fact` as a step in your agent's decision tree. If the agent needs historical context to proceed, it calls the tool and branches based on the result. This MCP Server provides the raw data your workflow needs to make smarter choices. You define the logic, and the tools provide the ground truth for your agent's next move.

Human-in-the-loop validation

Require approval for `get_trivia_fact` calls before they reach your final output. You can use Mastra AI to pause the workflow until a human confirms the fact is relevant. This keeps your autonomous agents on track while still allowing them to pull in external data. It’s perfect for agents that need to be precise but still flexible enough to handle curious user prompts.

Setup guide

Set up Numbers API 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 Numbers API 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: "numbers-api-mcp-client",
  servers: {
    "numbers-api-mcp": {
      url: new URL(
        "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
      ),
    },
  },
});

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

const result = await agent.generate(
  "List recent Numbers API 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 Numbers API. 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.

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Common questions about Numbers API MCP in Mastra AI

Install the MCP client package and define the server URL in your agent configuration. Mastra AI will auto-discover all five tools for you to use.

Absolutely. You can define a workflow where one agent gets a random number and another agent uses `get_trivia_fact` to describe it.

Yes, you can configure the agent to retry the tool call if the connection to the server experiences a temporary glitch.

The server only processes public number facts. It never sees or stores sensitive user inputs, keeping your workflow compliant and private.

You can explicitly map only the tools you want in your agent's tool definition, preventing unwanted access to specific functions like date lookups.

Use it with your favorite AI tools

Connect this server to Cursor, Claude, VS Code, and more.

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Google ADK sdk-python

Pydantic AI sdk-python

Vercel AI SDK sdk-typescript

Mastra AI sdk-typescript

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