Can I find all professional email addresses for a specific company?

Yes. Use `search_domain_emails` with a domain (e.g., 'stripe.com') or company name (e.g., 'Stripe') to retrieve all professional emails found for that organization. Each result includes the email, confidence score, position, and source URLs. Use `get_domain_email_count` to preview how many emails are available before using search credits.

Can I verify if an email address is valid before sending outreach?

Yes. The `verify_email_address` tool checks the validity and deliverability of any email address. It returns a status (deliverable, undeliverable, risky, unknown), confidence score, and details about the email server (MX records, SMTP check, accept-all detection). This prevents bounces and protects your sender reputation.

How does Hunter API authentication work?

Hunter uses an API Key passed as a query parameter (`?api_key=YOUR_KEY`) in all requests to `api.hunter.io/v2`. This differs from the typical Bearer token pattern. Your API key is available in the Hunter dashboard under Account > API. Free accounts include 25 searches and 50 verifications per month.

INSTANT PLUG AND PLAY

Hunter MCP Server for OpenAI Agents SDKGive OpenAI Agents SDK instant access to 12 tools to Create New Lead, Enrich Email Data, Find Person Email, and more

Name: Hunter
Availability: InStock
Author: Vinkius

Built by Vinkius GDPR 12 Tools SDK

The OpenAI Agents SDK enables production-grade agent workflows in Python. Connect Hunter through Vinkius and your agents gain typed, auto-discovered tools with built-in guardrails. no manual schema definitions required.

Use with Your AI Agent

Ask AI about this App Connector for OpenAI Agents SDK

Open in ChatGPT Open in Claude Open in Perplexity

The Hunter app connector for OpenAI Agents SDK is a standout in the Sales Automation category — giving your AI agent 12 tools to work with, ready to go from day one.

Vinkius delivers Streamable HTTP and SSE to any MCP client

python

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

async def main():
    # Your Vinkius token. get it at cloud.vinkius.com
    async with MCPServerStreamableHttp(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    ) as mcp_server:

        agent = Agent(
            name="Hunter Assistant",
            instructions=(
                "You help users interact with Hunter. "
                "You have access to 12 tools."
            ),
            mcp_servers=[mcp_server],
        )

        result = await Runner.run(
            agent, "List all available tools from Hunter"
        )
        print(result.final_output)

asyncio.run(main())

Fully ManagedVinkius Servers

60%Token savings

High SecurityEnterprise-grade

IAMAccess control

EU AI ActCompliant

DLPData protection

V8 IsolateSandboxed

Ed25519Audit chain

<40msKill switch

Stream every event to Splunk, Datadog, or your own webhook in real-time

* 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

About Hunter MCP Server

Connect your Hunter account to any AI agent and power your email prospecting through natural conversation.

The OpenAI Agents SDK auto-discovers all 12 tools from Hunter through native MCP integration. Build agents with built-in guardrails, tracing, and handoff patterns. chain multiple agents where one queries Hunter, another analyzes results, and a third generates reports, all orchestrated through Vinkius.

What you can do

Domain Search — Find all professional email addresses associated with a domain or company name
Email Finder — Discover the most likely email address for a specific person by name and company
Email Verification — Check the validity and deliverability of any email address with confidence scores
Email Count — Check how many email addresses are available for a domain before searching
Contact Enrichment — Retrieve all available professional data (title, company, social profiles) for an email address
Lead Management — Create, list, update, and delete leads in your Hunter CRM with lead list organization
Account Monitoring — Track remaining API credits and account usage

The Hunter MCP Server exposes 12 tools through the Vinkius. Connect it to OpenAI Agents SDK in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

All 12 Hunter tools available for OpenAI Agents SDK

When OpenAI Agents SDK connects to Hunter through Vinkius, your AI agent gets direct access to every tool listed below — spanning email-finder, domain-search, email-verification, and more. Every call is secured with network, filesystem, subprocess, and code evaluation entitlements inside a sandboxed runtime. Beyond a simple connection, you get a full AI Gateway with real-time visibility into agent activity, enterprise governance, and optimized token usage.

create_new_lead

Save lead to CRM

enrich_email_data

Get contact intel

find_person_email

Find personal email

get_account_usage

Check credits

get_domain_email_count

Check email availability

get_lead_details

Get lead info

list_lead_folders

List lead lists

list_saved_leads

List lead profiles

remove_lead

Delete lead record

search_domain_emails

Find emails for domain

update_lead_info

Modify lead data

verify_email_address

Check deliverability

Connect Hunter to OpenAI Agents SDK via MCP

Follow these steps to wire Hunter into OpenAI Agents SDK. The entire setup takes under two minutes — your credentials stay safe behind the Vinkius.

Install the SDK

Run pip install openai-agents in your Python environment

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token from cloud.vinkius.com

Run the script

Save the code above and run it: python agent.py

Explore tools

The agent will automatically discover 12 tools from Hunter

Why Use OpenAI Agents SDK with the Hunter MCP Server

OpenAI Agents SDK provides unique advantages when paired with Hunter through the Model Context Protocol.

Native MCP integration via `MCPServerSse`, pass the URL and the SDK auto-discovers all tools with full type safety

Built-in guardrails, tracing, and handoff patterns let you build production-grade agents without reinventing safety infrastructure

Lightweight and composable: chain multiple agents and MCP servers in a single pipeline with minimal boilerplate

First-party OpenAI support ensures optimal compatibility with GPT models for tool calling and structured output

Hunter + OpenAI Agents SDK Use Cases

Practical scenarios where OpenAI Agents SDK combined with the Hunter MCP Server delivers measurable value.

Automated workflows: build agents that query Hunter, process the data, and trigger follow-up actions autonomously

Multi-agent orchestration: create specialist agents. one queries Hunter, another analyzes results, a third generates reports

Data enrichment pipelines: stream data through Hunter tools and transform it with OpenAI models in a single async loop

Customer support bots: agents query Hunter to resolve tickets, look up records, and update statuses without human intervention

Example Prompts for Hunter in OpenAI Agents SDK

Ready-to-use prompts you can give your OpenAI Agents SDK agent to start working with Hunter immediately.

"Find all emails at stripe.com and verify the CTO's email address."

"Find the email for Sarah Chen at Acme Corp and enrich her contact data."

"Check my Hunter account credits and list all saved leads."

Troubleshooting Hunter MCP Server with OpenAI Agents SDK

Common issues when connecting Hunter to OpenAI Agents SDK through the Vinkius, and how to resolve them.

MCPServerStreamableHttp not found

Ensure you have the latest version: pip install --upgrade openai-agents

Agent not calling tools

Make sure your prompt explicitly references the task the tools can help with.

Hunter + OpenAI Agents SDK FAQ

Common questions about integrating Hunter MCP Server with OpenAI Agents SDK.

How does the OpenAI Agents SDK connect to MCP?

Use MCPServerSse(url=...) to create a server connection. The SDK auto-discovers all tools and makes them available to your agent with full type information.

Can I use multiple MCP servers in one agent?

Yes. Pass a list of MCPServerSse instances to the agent constructor. The agent can use tools from all connected servers within a single run.

Does the SDK support streaming responses?

Yes. The SDK supports SSE and Streamable HTTP transports, both of which work natively with Vinkius.