How to Use the NumVerify MCP in OpenAI Agents SDK

Q: How do I handle bad phone numbers in OpenAI Agents SDK using NumVerify?

Use validatephone inside your agent's tools list. If the number is invalid, the agent halts the pipeline immediately and prompts the user for a correction.

Q: Can I cache NumVerify tool definitions in the OpenAI Agents SDK?

Yes. Set cacheToolsList=True when configuring the MCPServerStreamableHttp instance. This prevents the SDK from refetching the tool schemas on every single agent run, cutting down execution latency.

Q: How does NumVerify prevent toll fraud inside OpenAI Agents SDK?

The agent calls getphonelinetype to flag virtual and VoIP numbers. Since most toll fraud originates from virtual numbers, your agent blocks these signups before sending a verification text.

Verify real-time carrier and location metadata directly inside your OpenAI Agents SDK pipelines to block fake signups before they hit your DB.

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Connect NumVerify MCP to OpenAI Agents SDK

Create your Vinkius account to connect NumVerify to OpenAI Agents SDK 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 NumVerify with OpenAI Agents SDK

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Stop VoIP spam in OpenAI Agents SDK runs

`get_phone_line_type` gives your OpenAI Agents SDK agent the exact connection type of any incoming number. You instantly know if a signup is a burner VoIP or a real mobile line before initiating an OTP SMS. The agent uses this data to trigger safety handoffs or block the user immediately. No more wasting money on SMS gateway fees for automated spam bots.

Auto-route users by carrier with this MCP Server

This MCP Server exposes `get_phone_carrier` to let your OpenAI Agents SDK verify which network provider owns a phone number. Your agent routes the lookup results directly to your carrier-specific delivery APIs. You program the agent to catch routing failures before they happen. Your delivery rates go up because you stop sending messages to decommissioned or ported networks.

Validate geographic location in real time

`get_phone_location` extracts the geographic origin of any phone number to match it against your user's declared country. Your OpenAI Agents SDK agent uses this MCP Server tool to cross-reference this data to flag suspicious country code mismatches. If a user claims to be in New York but registers a number located in Eastern Europe, the agent halts the onboarding flow. This keeps your user database clean and compliant with regional regulations.

Setup guide

Set up NumVerify MCP in OpenAI Agents SDK

Prerequisites

Python 3.10+ installed
openai-agents package (pip install openai-agents)
Active Vinkius subscription with a valid endpoint token

1

Install the SDK

Run pip install openai-agents to install the OpenAI Agents SDK. The MCP integration is built-in — no extra dependencies needed.
2

Connect via SSE transport

Use MCPServerSse with your Vinkius endpoint URL. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. The SDK auto-discovers all NumVerify tools at runtime.
3

Create your Agent

Pass the MCP to Agent(mcp_servers=[server]). The agent receives NumVerify tools as native definitions — JSON schemas resolve automatically.
4

Run the agent

Call Runner.run(agent, prompt) to execute. The agent invokes the appropriate NumVerify tools and returns structured results. Copy the full example on the right to get started.

agent.py

import asyncio
from agents import Agent, Runner
from agents.mcp import MCPServerSse

async def main():
    async with MCPServerSse(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    ) as server:
        agent = Agent(
            name="NumVerify Agent",
            instructions="You have access to NumVerify tools.",
            mcp_servers=[server],
        )
        result = await Runner.run(agent, "List recent transactions")
        print(result.final_output)

asyncio.run(main())

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Common questions about NumVerify MCP in OpenAI Agents SDK

Use `validate_phone` inside your agent's tools list. If the number is invalid, the agent halts the pipeline immediately and prompts the user for a correction.

Yes. Set `cacheToolsList=True` when configuring the MCPServerStreamableHttp instance. This prevents the SDK from refetching the tool schemas on every single agent run, cutting down execution latency.

The agent calls `get_phone_line_type` to flag virtual and VoIP numbers. Since most toll fraud originates from virtual numbers, your agent blocks these signups before sending a verification text.

Your OpenAI Agents SDK agent receives a clear error code during the `validate_phone` tool call. You should handle this in your Python code to fallback safely without crashing the user session.

No. The MCP server acts as an ephemeral proxy that queries the API and returns the carrier details to your SDK. Your raw phone numbers are never stored on Vinkius servers; they are processed in isolated V8 sandboxes and discarded immediately.

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