3,400+ MCP servers ready to use
Vinkius
O

Bring Email Finder
to OpenAI Agents SDK

Learn how to connect Hunter to OpenAI Agents SDK and start using 12 AI agent tools in minutes. Fully managed, enterprise secure, and ready to use without writing a single line of code.

Create New LeadEnrich Email DataFind Person EmailGet Account UsageGet Domain Email CountGet Lead DetailsList Lead FoldersList Saved LeadsRemove LeadSearch Domain EmailsUpdate Lead InfoVerify Email Address
Use with Your AI Agent
Ask AI about this MCP Server
ChatGPT Claude Perplexity

What is the Hunter MCP Server?

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

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

How it works

1. Subscribe to this server
2. Enter your Hunter API Key from the account dashboard
3. Start finding emails from Claude, Cursor, or any MCP-compatible client

Who is this for?

  • Sales Teams — find decision-maker emails, verify addresses before outreach, and save leads to your CRM
  • Recruiters — discover candidate contact information by name and company
  • Marketing Teams — build verified email lists, enrich contact databases, and manage prospecting pipelines

Built-in capabilities (12)

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

Why OpenAI Agents SDK?

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.

  • —

    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

O
See it in action

Hunter in OpenAI Agents SDK

AI Agent→Vinkius
High Security·Kill Switch·Plug and Play
Why Vinkius

Hunter and 3,400+ other MCP servers. One platform. One governance layer.

Teams that connect Hunter to OpenAI Agents SDK through Vinkius don't need to source, host, or maintain individual MCP servers. Every tool call runs inside a hardened runtime with credential isolation, DLP, and a signed audit chain.

3,400+MCP Servers ready
<40msCold start
60%Token savings
Raw MCP
Vinkius
Server catalogFind and host yourself3,400+ managed
InfrastructureSelf-hostedSandboxed V8 isolates
Credential handlingPlaintext in configVault + runtime injection
Data loss preventionNoneConfigurable DLP policies
Kill switchNoneGlobal instant shutdown
Financial circuit breakersNonePer-server limits + alerts
Audit trailNoneEd25519 signed logs
SIEM log streamingNoneSplunk, Datadog, Webhook
HoneytokensNoneCanary alerts on leak
Custom domainsNot applicableDNS challenge verified
GDPR complianceManual effortAutomated purge + export
Use with Your AI Agent View step-by-step setup guide for OpenAI Agents SDK →
Enterprise Security

Why teams choose Vinkius for Hunter in OpenAI Agents SDK

The Hunter 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. All 12 tools execute in hardened sandboxes optimized for native MCP execution.

Your AI agents in OpenAI Agents SDK only access the data you authorize, with DLP that blocks sensitive information from ever reaching the model, kill switch for instant shutdown, and up to 60% token savings. Enterprise-grade infrastructure, zero maintenance.

Use with Your AI Agent View full Hunter details →
Hunter
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

The Vinkius Advantage

How Vinkius secures Hunter for OpenAI Agents SDK

Every tool call from OpenAI Agents SDK to the Hunter MCP Server is protected by DLP redaction, cryptographic audit chains, V8 sandbox isolation, kill switch, and financial circuit breakers.

< 40msCold start
Ed25519Signed audit chain
60%Token savings
FAQ

Frequently asked questions

01

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.

02

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.

03

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.

04

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.

05

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.

06

Does the SDK support streaming responses?

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

07

MCPServerStreamableHttp not found

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

08

Agent not calling tools

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