Connectors · CRM & sales

Hunter.io MCP server for AI agents.

actionlake is an MCP gateway: one remote MCP server that connects Claude and other MCP clients to Hunter.io and the rest of your systems. It gives your agent 167 Hunter.io actions (71 reads, 73 writes and 23 that wait for a confirmation) and holds the Hunter.io credential itself, so the agent never does. It paces Hunter.io's limits and records every call.

Connect Hunter.io free See pricing

100,000 free calls a month. No card, no email, no password: press Start a free sandbox on the next screen and keep the key it shows you.

claude mcp add --transport http actionlake https://connect.actionlake.com/mcp

167actionsin one signed file
71readlook, never change
73writecreate and update
23wait for a yesdestructive, confirmed first

Set up

Connect Hunter.io in three steps.

01
Add actionlake to Claude.
Run the command once in Claude Code; its consent page can create a free sandbox: 100,000 calls a month, no card. In the Claude app, add a custom connector with the URL below and paste your key on the consent page. Creating a new sandbox from the Claude app is not yet tested by us.
https://connect.actionlake.com/mcp
02
Connect Hunter.io.
API key. No consent screen: your agent can connect it for you, but the key then passes through your chat. To keep it out of the model's context, paste it in the console instead. actionlake stores what you paste write-only, sealed under your tenant's key.
- api_keyHunter API key
```
account { op: "connections.requirements", service: "hunter" }
# free: exactly what to paste, and what is found for you
```

Make the first call. Check before a write.

Ask in plain words; Claude picks the action. Before anything changes, check validates the call and prices it, for free.

do    { action: "hunter.leads.list" }# list leads · read · 1 upstream callcheck { action: "hunter.leads.create", input: { … } }# free: inputs, permissions, cost and confirmations, nothing sent

Hunter.io at a glance

Sign-in: API key. No consent screen: your agent can connect it for you, but the key then passes through your chat. To keep it out of the model's context, paste it in the console instead.
You provide: api_key
Limits we pace to: 15 calls a second, per connection
API covered: Hunter API v2 (OpenAPI 2.0.0)api.hunter.io/v2
Built from: Hunter.io's documentation, read 22 October 2026hunter.io hunter.io
Service file: Version 1.0.0, signed (Ed25519)
Cached reads: 70 of 71 reads, for up to an hour; a write clears what it affects
Shared entities: 3, so ask can line Hunter.io up with your other systems
Data: Processed and stored in Sydney, Australia. No US region yet

Capabilities

What an AI agent can do in Hunter.io.

167 actions in 1 area. Every one carries its effect, so a key can allow the reads and hold the rest.

71readlook, never change
73writecreate and update
23destructivewait for a confirmation

Hunter
167
71 read · 73 write · 23 destructive
List leads · List saved companies · List team members · Create a lead

Top actions

The Hunter.io API, shaped for agents.

The ids your agent types, what each does, and the one name it shares with other systems. 12 of Hunter.io's 12 action names are shared with at least one other connector, so an agent learns them once.

Action	What it does	Effect	Same name in
`hunter.leads.list`List leads	List leads.	read	`crm.contact.list`177 connectors
`hunter.companies.list`List saved companies	List saved companies.	read	`crm.company.list`162 connectors
`hunter.team_members.list`List team members	List team members.	read	`identity.user.list`474 connectors
`hunter.leads.create`Create a lead	Create a lead.	write	`crm.contact.create`161 connectors
`hunter.companies.create`Save a company	Save a company.	write	`crm.company.create`142 connectors
`hunter.leads.delete`Delete a lead	Delete a lead.	destructive	`crm.contact.delete`147 connectors
`hunter.account.get`Get account details and usage	Get account details and usage.	read	`identity.current_user.get`307 connectors
`hunter.tags.list`List lead tags	List lead tags.	read	this connector
`hunter.tags.create`Create a lead tag	Create a lead tag.	write	this connector
`hunter.api_keys.list`List API keys	List API keys.	read	this connector
`hunter.messages.list`List messages	List messages.	read	this connector
`hunter.messages.send`Send a one-off message	Send a one-off message.	write	this connector

Try it

Prompts to paste into Claude.

Each one names the Hunter.io actions it will call, so you know what it reads and what it changes before you send it.

Readread
Find the Hunter.io contacts with no email address, so we can clean them up.
callshunter.leads.list
Writewrite
Create a lead in Hunter.io. Show me exactly what you will send before you save it.
callshunter.leads.create
Across systemsread
Which contacts are in both Hunter.io and HaloPSA, and how many are in only one of them?
callshunter.leads.listhalopsa.users.list

Across your systems

Hunter.io, joined to the rest of your business.

One ask fetches from Hunter.io and another system, joins the rows on the same customer on our side, and hands your agent the answer, not every row.

Which contacts are in both Hunter.io and HaloPSA, and how many are in only one of them?
hunter.leads.list + halopsa.users.list, on crm.contact · HaloPSA
Which contacts are in both Hunter.io and NetSuite, and how many are in only one of them?
hunter.leads.list + netsuite.views.contacts, on crm.contact · NetSuite

Also mapped by other connectorsidentity.user 517crm.company 227crm.contact 192

ask

ask {  intent: "which contacts are in both Hunter.io and HaloPSA, and how many are in only one of them",  steps: [    { action: "hunter.leads.list", as: "people", input: {}, limit: 100, max_pages: 5 },    { action: "halopsa.users.list", as: "people2", input: {}, limit: 100, max_pages: 5 },    { join: {        left: "people",        right: "people2",        on: "crm.contact",        group_by: "people.email",        select: ["people.email", "count(people2.id) as in_halopsa"]    } }  ]}

Example. Run it through check first: it validates the steps and prices them, and it is free.

Governance for Hunter.io

Destructive actions wait for a yes.

23 Hunter.io actions are destructive. These are all of them:

Delete a leadhunter.leads.delete
Delete a saved companyhunter.companies.delete
Delete a lead taghunter.tags.delete
Delete an API keyhunter.api_keys.delete
Delete a webhookhunter.webhooks.delete
Remove a tag from a leadhunter.lead_tags.detach
Delete a sequencehunter.sequences.delete
Delete leads in bulkhunter.leads.bulk_delete
Delete a lead listhunter.leads_lists.delete
Delete a company taghunter.company_tags.delete
Delete a company listhunter.company_lists.delete
Delete companies in bulkhunter.companies.bulk_delete
Delete a saved discover viewhunter.discover_views.delete
Delete a message templatehunter.message_templates.delete
Delete webhooks by identifier (legacy)hunter.webhooks.delete_by_query
Delete a lead list folderhunter.leads_list_folders.delete
Remove campaign recipientshunter.campaign_recipients.remove
Delete a sequence follow-up stephunter.sequence_follow_ups.delete
Remove sequence recipientshunter.sequence_recipients.remove
Delete a company list folderhunter.company_list_folders.delete
Remove a company from a company listhunter.company_list_companies.remove
Delete a lead custom attributehunter.lead_custom_attributes.delete
Remove a tag from a saved companyhunter.company_tag_assignments.delete

A destructive action runs only with confirm: true. Under the human policy the agent cannot confirm for itself: the run stops until a named person approves, in the console or from a signed link in an email. The cap on a key is refused before the call is sent, never after.

dohunter.leads.deleteconfirm_policy: human

Delete a lead?

intent: the user asked me to delete a lead

run suspended · waiting for a named person · key hunter-agent cannot confirm itself

In the console, or from an emailed signed link.

a key for this connector

account {  op: "keys.create", name: "hunter-agent",  allowed_actions: ["hunter.*"], cap_calls: 2000,  confirm_policy: "human_for_writes",  approval_rules: [    { match: "hunter.leads.delete", approver: "[email protected]" },    { match: "hunter.companies.delete", approver: "[email protected]" },    { match: "hunter.tags.delete", approver: "[email protected]" }  ]}

Illustrative. Scoped to Hunter.io only, capped at 2,000 upstream calls, every write confirmed, and the destructive ones approved by a named person.

Cost

What Hunter.io costs on actionlake.

Every Hunter.io action is one upstream call, the only thing actionlake bills. Searching, check, cost, account and any call Hunter.io refused with 401, 403, 429 or a 5xx are free. Paid plans start at US$49 a month for 250,000 calls, with overage from US$0.30 down to US$0.18 per 1,000.

1upstream call per actionall 167 Hunter.io actions
167actions pageeach page of a long list is one call
70reads can be cacheda cache hit costs nothing
100,000calls a month, freepaid plans from US$49 a month for 250,000

See pricing

Action index

Every Hunter.io action.

167 actions by area: the id your agent calls, what it does, and its effect.

Hunter167

hunter.account.getGet account details and usageread
hunter.account.get_statsGet account profile summaryread
hunter.account.updateUpdate account detailswrite
hunter.api_keys.createCreate an API keywrite
hunter.api_keys.deleteDelete an API keydestructive
hunter.api_keys.listList API keysread
hunter.api_keys.replaceReplace an API keywrite
hunter.api_keys.updateUpdate an API keywrite
hunter.campaign_follow_ups.createAdd a campaign follow-up stepwrite
hunter.campaign_follow_ups.getGet a campaign follow-up stepread
hunter.campaign_recipients.addAdd campaign recipientswrite
hunter.campaign_recipients.listList campaign recipientsread
hunter.campaign_recipients.removeRemove campaign recipientsdestructive
hunter.campaigns.listList campaignsread
hunter.campaigns.startStart a campaignwrite
hunter.combined.enrichEnrich a person and companyread
hunter.companies.bulk_copyCopy companies to another list in bulkwrite
hunter.companies.bulk_deleteDelete companies in bulkdestructive
hunter.companies.bulk_moveMove companies to another list in bulkwrite
hunter.companies.bulk_tagTag companies in bulkwrite
hunter.companies.createSave a companywrite
hunter.companies.deleteDelete a saved companydestructive
hunter.companies.getGet a saved companyread
hunter.companies.listList saved companiesread
hunter.companies_enrichment.enrichEnrich a companyread
hunter.company_list_companies.addAdd a company to a company listwrite
hunter.company_list_companies.removeRemove a company from a company listdestructive
hunter.company_list_folders.createCreate a company list folderwrite
hunter.company_list_folders.deleteDelete a company list folderdestructive
hunter.company_list_folders.getGet a company list folderread
hunter.company_list_folders.listList company list foldersread
hunter.company_list_folders.replaceReplace a company list folderwrite
hunter.company_list_folders.updateUpdate a company list folderwrite
hunter.company_lists.createCreate a company listwrite
hunter.company_lists.deleteDelete a company listdestructive
hunter.company_lists.favoriteFavorite a company listwrite
hunter.company_lists.getGet a company listread
hunter.company_lists.listList company listsread
hunter.company_lists.replaceReplace a company listwrite
hunter.company_lists.unfavoriteUnfavorite a company listwrite
hunter.company_lists.updateUpdate a company listwrite
hunter.company_tag_assignments.createTag a saved companywrite
hunter.company_tag_assignments.deleteRemove a tag from a saved companydestructive
hunter.company_tags.createCreate a company tagwrite
hunter.company_tags.deleteDelete a company tagdestructive
hunter.company_tags.getGet a company tagread
hunter.company_tags.listList company tagsread
hunter.company_tags.replaceReplace a company tagwrite
hunter.company_tags.updateUpdate a company tagwrite
hunter.connected_apps.getGet a connected appread
hunter.connected_apps.listList connected appsread
hunter.connected_apps.push_leadsPush data to a connected appwrite
hunter.discover.searchDiscover companiesread
hunter.discover_people.searchDiscover people matching filtersread
hunter.discover_people.search_filtersDiscover people using request-body filtersread
hunter.discover_views.createCreate a saved discover viewwrite
hunter.discover_views.deleteDelete a saved discover viewdestructive
hunter.discover_views.getGet a saved discover viewread
hunter.discover_views.listList saved discover viewsread
hunter.domain_finder.findFind the domain for a companyread
hunter.domain_finder.find_postFind the domain for a company via POSTread
hunter.domain_search.searchFind email addresses by domainread
hunter.domain_search.search_advancedFind email addresses by domain using request-body parametersread
hunter.domains.countCount domains matching discovery filtersread
hunter.domains.suggestSuggest domains for a company nameread
hunter.email_accounts.getGet an email accountread
hunter.email_accounts.get_capacitiesGet email account sending capacitiesread
hunter.email_accounts.get_health_reportGet an email account health reportread
hunter.email_accounts.get_usageGet an email account usage reportread
hunter.email_accounts.get_warmup_reportGet an email account warmup reportread
hunter.email_accounts.listList email accountsread
hunter.email_accounts.list_sequencesList sequences using an email accountread
hunter.email_accounts.replaceReplace an email accountwrite
hunter.email_accounts.updateUpdate an email accountwrite
hunter.email_count.getCount email addresses for a domainread
hunter.email_finder.findFind a professional email addressread
hunter.email_finder.find_foundGet a previously found email addressread
hunter.email_finder.find_found_postGet a previously found email address via POSTread
hunter.email_insight.getGet deliverability insight for an email addressread
hunter.email_verifier.verifyVerify an email addressread
hunter.feedback.createSubmit product feedbackwrite
hunter.lead_custom_attributes.createCreate a lead custom attributewrite
hunter.lead_custom_attributes.deleteDelete a lead custom attributedestructive
hunter.lead_custom_attributes.getGet a lead custom attributeread
hunter.lead_custom_attributes.listList lead custom attributesread
hunter.lead_custom_attributes.replaceReplace a lead custom attributewrite
hunter.lead_custom_attributes.updateUpdate a lead custom attributewrite
hunter.lead_tags.attachTag a leadwrite
hunter.lead_tags.detachRemove a tag from a leaddestructive
hunter.leads.bulk_check_existsCheck whether leads exist in bulkread
hunter.leads.bulk_deleteDelete leads in bulkdestructive
hunter.leads.bulk_moveMove leads to another list in bulkwrite
hunter.leads.bulk_upsertUpsert leads in bulkwrite
hunter.leads.check_existsCheck whether a lead existsread
hunter.leads.createCreate a leadwrite
hunter.leads.deleteDelete a leaddestructive
hunter.leads.enrichEnrich a leadwrite
hunter.leads.getGet a leadread
hunter.leads.listList leadsread
hunter.leads.replaceReplace a leadwrite
hunter.leads.updateUpdate a leadwrite
hunter.leads.upsertUpsert a leadwrite
hunter.leads_imports.createCreate a leads import from CSV datawrite
hunter.leads_list_folders.createCreate a lead list folderwrite
hunter.leads_list_folders.deleteDelete a lead list folderdestructive
hunter.leads_list_folders.getGet a lead list folderread
hunter.leads_list_folders.listList lead list foldersread
hunter.leads_list_folders.replaceReplace a lead list folderwrite
hunter.leads_list_folders.updateUpdate a lead list folderwrite
hunter.leads_lists.createCreate a lead listwrite
hunter.leads_lists.deleteDelete a lead listdestructive
hunter.leads_lists.favoriteFavorite a lead listwrite
hunter.leads_lists.getGet a lead listread
hunter.leads_lists.listList lead listsread
hunter.leads_lists.mergeMerge lead listswrite
hunter.leads_lists.replaceReplace a lead listwrite
hunter.leads_lists.unfavoriteUnfavorite a lead listwrite
hunter.leads_lists.updateUpdate a lead listwrite
hunter.lookalikes.listFind lookalike companies from a company list or a domainread
hunter.message_templates.createCreate a message templatewrite
hunter.message_templates.deleteDelete a message templatedestructive
hunter.message_templates.getGet a message templateread
hunter.message_templates.listList message templatesread
hunter.message_templates.replaceReplace a message templatewrite
hunter.message_templates.updateUpdate a message templatewrite
hunter.messages.listList messagesread
hunter.messages.sendSend a one-off messagewrite
hunter.multi_domain_search.revealReveal emails from a multi-domain searchwrite
hunter.multi_domain_search.searchMulti-domain searchread
hunter.people.enrichEnrich a personread
hunter.sequence_follow_ups.createAdd a sequence follow-up stepwrite
hunter.sequence_follow_ups.deleteDelete a sequence follow-up stepdestructive
hunter.sequence_follow_ups.getGet a sequence follow-up stepread
hunter.sequence_follow_ups.listList sequence follow-up stepsread
hunter.sequence_follow_ups.replaceReplace a sequence follow-up stepwrite
hunter.sequence_follow_ups.updateUpdate a sequence follow-up stepwrite
hunter.sequence_recipients.addAdd sequence recipientswrite
hunter.sequence_recipients.listList sequence recipientsread
hunter.sequence_recipients.removeRemove sequence recipientsdestructive
hunter.sequences.archiveArchive a sequencewrite
hunter.sequences.createCreate a sequencewrite
hunter.sequences.deleteDelete a sequencedestructive
hunter.sequences.getGet a sequenceread
hunter.sequences.get_statsGet sequence performance statsread
hunter.sequences.listList sequencesread
hunter.sequences.pausePause a sequencewrite
hunter.sequences.replaceReplace a sequencewrite
hunter.sequences.resumeResume a paused sequencewrite
hunter.sequences.send_testSend a test email for every step of a sequencewrite
hunter.sequences.startStart a sequencewrite
hunter.sequences.updateUpdate a sequencewrite
hunter.tags.createCreate a lead tagwrite
hunter.tags.deleteDelete a lead tagdestructive
hunter.tags.getGet a lead tagread
hunter.tags.listList lead tagsread
hunter.tags.replaceReplace a lead tagwrite
hunter.tags.updateUpdate a lead tagwrite
hunter.team_members.listList team membersread
hunter.usage.getGet credit usage summaryread
hunter.usage.list_historyGet credit usage historyread
hunter.webhooks.createCreate a webhookwrite
hunter.webhooks.deleteDelete a webhookdestructive
hunter.webhooks.delete_by_queryDelete webhooks by identifier (legacy)destructive
hunter.webhooks.getGet a webhookread
hunter.webhooks.listList webhooksread
hunter.webhooks.replaceReplace a webhookwrite
hunter.webhooks.updateUpdate a webhookwrite

Questions

The Hunter.io MCP server, answered.

Is there a Hunter.io MCP server for Claude?

Yes. actionlake is an MCP gateway: a remote MCP server that gives Claude, or another MCP client, 167 Hunter.io actions, through the same eight tools it uses for every other connector. actionlake is independent; it is not made or endorsed by Hunter.io.

What do I need to connect Hunter.io?

Hunter API key. The free call account { op: "connections.requirements", service: "hunter" } lists exactly what to paste.

Can an AI agent delete or change things in Hunter.io?

Only if its key allows it, and only with an explicit confirmation. 23 Hunter.io actions are destructive, including delete a lead, delete a saved company and delete a lead tag. Each runs only with confirm: true. Under the human confirm policy, or an approval rule on the key, the run waits until a named person approves it.

Will an AI agent use up my Hunter.io API limit?

actionlake paces every call to the limits in the Hunter.io service file: 15 calls a second per connection. Repeated reads are answered from cache (70 Hunter.io actions can be), which never reaches Hunter.io.

What does a Hunter.io action cost?

One upstream call, the only unit actionlake bills. A list that pages bills one call per page (167 Hunter.io actions page). Cache hits, searches, dry runs and calls Hunter.io refused with 401, 403, 429 or a 5xx are free. The Free plan includes 100,000 calls a month with no card. Paid plans start at US$49 a month for 250,000 calls, with overage from US$0.30 down to US$0.18 per 1,000.

Which Hunter.io API does it cover?

The Hunter API v2 (OpenAPI 2.0.0) at api.hunter.io/v2. It is built from Hunter.io's documentation as read on 22 October 2026. 167 actions in 1 area, each one in the signed service file (version 1.0.0).

Can I combine Hunter.io with my other systems?

Yes. ask joins Hunter.io to HaloPSA or NetSuite on the same customer and returns the answer rather than every row. Hunter.io maps crm.company, which 227 other connectors also map.

Does actionlake keep my Hunter.io data, and where?

actionlake processes and stores data in Sydney, Australia; there is no US region yet. Reads may be cached for up to an hour, and a write clears the reads it affects. Each run's request and response is kept, sealed, for your plan's trace window: 1 day on Free, 3 days on Starter, 7 days on Pro, 14 days on Team, 30 days on Business and 30 days on Enterprise. Your Hunter.io credential is sealed under your tenant's key, never logged and never returned. Your traffic is not used to train models.

Which AI clients can use it?

Claude Code, tested by us end to end, and the Claude app as a custom connector, tested by us with an existing key. Other MCP clients that support remote servers over Streamable HTTP (MCP revisions 2025-06-18 and 2025-11-25) and OAuth dynamic client registration, or a bearer header, should connect the same way; we have not tested them. Or plain REST, under the same action names.

Give your agent Hunter.io today.