Integration · Company data

Connect Claude & ChatGPT to 1Lookup

Ask your AI whether a phone number is valid, if an email address is deliverable, or what a company behind a domain looks like. Through 1Lookup it can validate and check phone numbers, verify and enrich emails, look up IP addresses and LinkedIn pages, and search for companies and prospects. Each lookup uses your 1Lookup credits.

Connect 1Lookup free

Free plan, no credit card. Takes about a minute.

Try asking

“Is +4520123456 a valid mobile number, and which carrier is it on?”
The AI validates the number and returns whether it is valid, the line type and the carrier.
“Can we call these five numbers, or are any on a do-not-call list?”
It checks each number against do-not-call and litigator lists, one credit per number.
“Is [email protected] a deliverable address?”
It verifies the address without sending an email and tells you whether it is deliverable.

What your AI can do

Phone checks

Validate numbers, run HLR lookups, check spam history and scrub numbers against do-not-call and litigator lists.

Email and contact data

Verify and enrich email addresses, find emails and mobile numbers, and add B2B contact details.

Companies and prospects

Get company profiles and firmographics by domain, search companies and prospects, and look up LinkedIn pages and IPs.

“What do we know about the company behind nordlys.dk?”
It pulls firmographics for the domain, such as size, industry, revenue and location.
“Find marketing managers at SaaS companies.”
It searches for B2B prospects matching your keywords. Searches use credits.
“How many credits do I have left?”
It reads your 1Lookup account status and remaining credit balance.

23 tools for 1Lookup

These tools are switched on when you connect. You can switch any of them off, or require your approval before it runs.

append_b2b_contactChanges dataAdd B2B contact details (job title, company, phone) for an `email` address. Uses a credit.
check_phone_dncChanges dataCheck a phone number (`phone_number`) against do-not-call and litigator lists. Uses a credit.
check_phone_spamChanges dataCheck a phone number (`phone_number`) for spam or fraud history. Uses a credit.
enrich_emailVisible to othersEnrich a contact from an email address (`input`): name, company, social profiles and more. Uses a credit.
find_emailVisible to othersFind an email address for a contact from an identifier such as a name and company (`input`). Uses a credit.
find_mobile_numberChanges dataFind a mobile number for a contact from an identifier such as an email address (`input`). Uses a credit.
find_phone_by_addressChanges dataFind a phone number for a person from their name and address (`input`). Uses a credit.
find_website_contactsChanges dataFind contact details (emails, phones, social links) published on a website `domain`. Uses a credit.
get_accountGet your 1Lookup account status and remaining credit balance.
get_company_firmographicsChanges dataGet company firmographics (size, industry, revenue, location) for a `domain`. Uses a credit.
get_company_profileChanges dataGet a company profile by its `domain`. Uses a credit.
hlr_lookup_phoneChanges dataRun an HLR lookup on an international mobile number (`phone_number`) to see if it is live and reachable. Uses a credit.
lookup_businessChanges dataLook up a business record by `business_name`. Uses a credit.
lookup_ipChanges dataLook up an IP address (`ip`): location, network and risk. Uses a credit.
lookup_linkedin_companyChanges dataLook up a LinkedIn company page by its `company_url`. Uses a credit.
lookup_linkedin_profileChanges dataLook up a LinkedIn profile by its `profile_url`. Uses a credit.
reverse_email_lookupMoves moneyReverse email lookup: find the person behind an email address (`email`). Uses a credit.
reverse_phone_lookupMoves moneyReverse phone lookup: find who a phone number (`phone_number`) belongs to. Uses a credit.
search_companiesChanges dataSearch for B2B accounts (companies) matching `keywords`. Uses credits.
search_prospectsChanges dataSearch for B2B prospects (people) matching `keywords`, e.g. job title and industry. Uses credits.
validate_phoneChanges dataValidate a phone number (`phone_number`, E.164 recommended): whether it is valid, its line type and carrier. Uses a credit.
verify_businessChanges dataCheck whether a business exists by `business_name`. Uses a credit.
verify_emailVisible to othersVerify whether an email address (`email`) is deliverable. No email is sent. Uses a credit.

Set up in three steps

1
Pick the app
Create a free PipMCP account and choose 1Lookup from the app list.
2
Paste your key
API access needs a paid 1Lookup plan. In the 1Lookup dashboard, open API keys (app.1lookup.io/api-keys) and create a key. It starts with sk_live_ and is shown only once, so paste it into PipMCP straight away.
3
Add the link to your AI
You get a personal MCP link. Add it to Claude, ChatGPT or Cursor:
1. Click your name, then Settings › Connectors › Add custom connector.
2. Paste your link as the Remote MCP server URL.
3. Switch it on from the + menu in a chat.

Questions

What can the AI do in 1Lookup?

The AI can validate phone numbers, run HLR lookups, check numbers for spam and against do-not-call lists, and do reverse phone and email lookups. It can verify, find and enrich emails, find mobile numbers and website contacts, look up IPs and LinkedIn pages, get company profiles and firmographics, verify businesses, and search companies and prospects. It can also read your credit balance.

Does the AI see my 1Lookup credentials?

No. Your 1Lookup API key is encrypted at rest and never shown to the AI. After you save it, it is not shown again, not even to you. The AI only sees the results of the tools it calls.

Can I control what the AI is allowed to do?

Yes. You choose which tools are switched on, for example phone validation without reverse lookups. Reverse phone and email lookups find the person behind a number or address and can require your approval before they run. Every tool call is logged.

Does it work with ChatGPT?

Yes. In ChatGPT, open Settings › Apps & Connectors › Advanced, turn on Developer mode and add your PipMCP link. Developer mode needs a paid ChatGPT plan: Plus, Pro, Business or Enterprise. The same link also works in Claude (Settings › Connectors › Add custom connector), Cursor and other MCP clients.

What does it cost?

PipMCP has a free plan with no credit card required. Paid plans bill per completed task. You also need your own 1Lookup account on a paid plan with API access, and lookups use your 1Lookup credits.

Does every lookup use 1Lookup credits?

Almost every lookup, search and enrichment tool uses credits on your 1Lookup account. Reading your account status and credit balance does not. Switch on only the tools you need, and ask the AI to check your balance before a large batch.