How to Use the U.S. Congress MCP in Mastra AI

Q: How does Mastra AI handle retrieving member data from U.S. Congress?

You set up a process that calls listcongressmembers. If the API is temporarily down, the workflow will automatically retry the call with increasing wait times until it succeeds.

Q: What if my nomination search fails using U.S. Congress and Mastra AI?

You can set up a specific failure handler. If listcongressnominations fails, the workflow executes an alternate path—maybe it sends an alert or tries searching for treaties instead.

Q: Can I combine bill details with treaties using U.S. Congress and Mastra AI?

You can certainly build a flow where one step fetches getbilldetails and the next step uses those results to inform which related treaties, listed by listcongresstreaties, need to be checked.

Build complex U.S. legislative workflows with Mastra AI and the U.S. Congress MCP Server.

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Create your Vinkius account to connect U.S. Congress 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 U.S. Congress with Mastra AI

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Automated Congressional Research Workflows

Write a workflow that calls `list_congress_bills` to get a starting list of bills, then uses conditional branching to check specific details with `get_bill_details`. Mastra AI handles the entire multi-step process automatically. If the initial bill search fails or hits an error, the built-in retries feature kicks in. It will try again with exponential backoff until it gets a valid list of bills.

Handling Member and Committee Data Failures

Set up a sequence to pull data using `list_congress_members` followed by `list_congress_committees`. If the committee listing fails, you can notify an administrator via Mastra AI's failure handling without stopping the entire process. The workflow manages these dependencies gracefully, ensuring that even partial information gathering completes successfully.

Sequencing Historical and Nomination Checks

Design a flow that first pulls historical data via `list_congress_sessions` to establish the time period. Then, it automatically executes `list_congress_nominations` for members within those dates. Mastra AI ensures these two steps run in order. The entire sequence is deployable with one command, making complex legislative tracking simple.

Setup guide

Set up U.S. Congress 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 U.S. Congress 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: "us-congress-mcp-client",
  servers: {
    "us-congress-mcp": {
      url: new URL(
        "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
      ),
    },
  },
});

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

const result = await agent.generate(
  "List recent U.S. Congress 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 Congress.gov. 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 U.S. Congress MCP in Mastra AI

Yes. You can create a multi-step process: first, list bills with `list_congress_bills`, then use the resulting bill IDs to query all related records using `list_congress_amendments`.

You set up a process that calls `list_congress_members`. If the API is temporarily down, the workflow will automatically retry the call with increasing wait times until it succeeds.

You can set up a specific failure handler. If `list_congress_nominations` fails, the workflow executes an alternate path—maybe it sends an alert or tries searching for treaties instead.

This server touches public legislative records (nominations, committee lists, etc.). The data type is structured Congressional metadata, which the workflow executes in controlled, traceable steps.

You can certainly build a flow where one step fetches `get_bill_details` and the next step uses those results to inform which related treaties, listed by `list_congress_treaties`, need to be checked.

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