NEWSeamless MCP server
The world’s best
go‑to‑market data for
humans and agents
1.4B+ verified emails and 448M+ phone numbers, researched live, for your GTM team and agents.
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Rated 4.4 out of 5 on G2.Over 5,400+ reviewsReal-time AI data engine
Most data is stored. Ours is researched live.
No more bounced emails, missing mobiles or wrong titles. Every search runs through the engine the moment you ask. It researches the data, verifies every email and phone, and returns the most complete profiles on the planet.
- Public data
- Private data
- News and SEC filings
- Search engines
- Email validation
- Phone research
- Contributory network
- Intent signals
- Social signals
- Names
- Titles
- Companies
- Emails
- Mobiles
- Buyer intent
- Job changes
- Tech installs
- Fundraising
- News and events
- Locations
- 100+ data points
People Search
Find every buyer. Anywhere. Instantly.
Search contacts by title, industry, location, company size and more. Discover your ideal buyers with verified emails and phones, researched live.
1.2B+contacts, validated in real time
SearchEmail Finder
Every email, instantly verified when you search
Pick your buyers and Seamless researches every email live, then verifies it before it reaches your sequence. Fewer bounces, more replies.
1.4B+verified work emails
Email FinderQ4 target accounts
Phone Finder
Reach the mobile, not the front desk
Seamless finds mobiles and direct dials for each buyer and verifies each number live, so you call the one that reaches the buyer.
448M+phone numbers and mobiles
Phone FinderMaya OkaforVP of IT, Bluefield Logistics
Agents, APIs and MCP
Plug verified data into any agent
Ask Claude or ChatGPT for a prospect list, or call the same data from your own systems with the Seamless API and MCP server.
- AI Agents
- APIs
- MCP server
search_contactsVerifyingVerified
Claude /contacts/search200 OKPOST /contacts/search{ "title": "Director of IT", "location": "Texas", "limit": 50}200 OK{ "total": 50, "name": "Maya Okafor", "email": "verified", "mobile": "verified"}
- 50 work emails verified
- 47 mobiles verified
Synced to your CRMsearch_contactsConnectedtool search_contacts{ "title": "Director of IT", "location": "Texas"}result{ "found": 50, "verified": 50, "next": "add_to_list"}
- 50 work emails verified
- 47 mobiles verified
Claude adds all 50 to your listClaude
ChatGPTand any MCP client.
Buyer Intent
See who’s shopping for what you sell
Seamless shows which companies are researching your category right now, how strong the intent is and who to reach there.
1B+monthly buyer intent signals
Buyer intentBluefield Logistics is researching cloud security tools
Job Changes
Reach buyers the day they start
Records update when people move or get promoted, so your data stays current and you’re the first call in a new seat.
8M+job changes tracked every month
Job changesSpotted today, 9:14 AM
Maya OkaforVP of IT, Bluefield Logistics
New in the seat. Reach out while they choose vendors.
Signals
Every buying signal. Every account.
Buyer intent, job changes, funding, M&A, news and tech changes, all on one record. See what moves at every account first, and know who to call and why now.
1B+buyer intent
signals a month
8M+job changes
a month
150,000+news and
event signals
25,000+funding and
M&A events
All signalsSpotted today, 9:14 AM
Bluefield Logistics hired Maya Okafor as VP of IT
Job changeAI Campaigns
From idea to outreach in seconds
Our AI finds your ideal buyers, verifies their contact information and builds your entire outreach campaign automatically.
AI CampaignFind VPs of Engineering at 50 to 200 person companies that raised $20M or more this year and use Jira.
Seamless is searching
and 179 more accounts
- Day 1EmailCongrats on the Series B, Priya
- Day 3CallCall script from her role and funding
- Day 5LinkedInConnection note on the Jira rollout
- Day 7Follow-upShort bump on the first email
Campaign live for 728 verified buyers
Loved by the people who grow with it
“Very accurate contact data, especially cell phone numbers. Good customer service and very willing to train”
“Identifying key decision makers in seconds”
“I find Seamless very user-friendly, even as someone who isn't tech-savvy, I can find what I'm looking for in just minutes.”
“I really appreciate Seamless for its automated campaigns, which are like having additional employees focusing on emails and persistent follow-up.”
“…helping me reach decision makers quickly, which shortens my sales process.”
“Seamless is the quickest and easiest way to acquire a list of leads or find specific contact info.”
“I use Seamless to find the right contacts for companies quickly, solving my issues with getting mobile numbers and email addresses.”
“The setup was straightforward and hassle-free, which was a great start.”
“I really like how fast the information becomes available, making it very quick and easy to implement into my sales process.”
“It gives us a user-friendly platform to search prospective contacts and companies in our sales geography.”
“I rarely am unable to find contact information for someone I'm trying to connect with…”
Identity resolution and data enrichment
Perfect data pushed to your CRM
Paste an email or phone and get the person behind it. Upload a CSV and get every row back complete, ready for your CRM.
- CRM Cleaning and Enrichment
- Identity Resolution
- Data Enrichment
Reverse LookupCSVCRM PushSophia MeyerVP of Marketing, Oakline Software
Match foundq4-accounts.csv4 rows
Priya Ramanp.raman@ledgerlinefin.com
Marcus Bellm.bell@quarryhealthco.com
J. CarterNo valid email
Invalid, credit refundedAmara Oseia.osei@northpeaklabsco.com
3 rows enriched, 1 invalidClean and raw files ready
1,238records pushed
858records pushed
Maya OkaforNew title: VP of IT
SalesforceDana WhitfieldNew mobile: (555) 0136-4410
HubSpotSophia MeyerNew work email
SalesforcePriya RamanNew mobile: (555) 0167-2290
HubSpotVerified records pushed to your CRMDuplicates skipped
- LLMs and agentsClaude, ChatGPT, Gemini, Microsoft Copilot, Perplexity, Any MCP client
- CRMsHubSpot, Microsoft Dynamics 365, Pipedrive, Zoho CRM, Close
- Email and calendarGmail, Outlook, Google Calendar, Microsoft 365, Calendly, Chili Piper
- Dialers and sales engagementOrum, Nooks, Aircall, RingCentral, Dialpad, Koncert, Outreach, Salesloft, lemlist, Reply.io, Instantly, Mixmax
- Workflow and automationAsana, Monday.com, Jira, ClickUp, Notion, Trello, Zapier, Make, Workato, Slack, Microsoft Teams, Webhooks
Customer results
Billions of leads.
Millions of meetings.
Every lead researched, meeting held and deal won by Seamless users, counted live and still climbing.
Security and compliance
Enterprise-grade security you can trust
GDPR, CCPA, SOC 2 Type II, ISO 27001 and much more. Security you can trust at scale, for your reps, your data and the agents you plug in.
G2 Grid® Leader
The G2 Leader for go‑to‑market data
Rated by the teams who use it: a Leader on the G2 Grid® and #1 in Highest Satisfaction out of 125,912 products.
- LeaderG2 Grid® Leader and Momentum LeaderG2, Fall 2026
- #1Tech Company of the YearNJTC
- ForbesTop Places to WorkAmerica, 2025
- 3xLinkedIn Top StartupIn the United States
Questions teams ask before they switch
How the data is researched, where it comes from, how it stays compliant and how it plugs into your stack.
What is Seamless?
How accurate is Seamless’s contact data?
Where does Seamless’s data come from?
How much data does Seamless have?
How is Seamless different from a static contact database?
Is Seamless GDPR and CCPA compliant?
Can I use Seamless with ChatGPT, Claude or my own AI agents?
Does Seamless have an API for data enrichment?
Does Seamless integrate with my CRM?
What buying signals does Seamless track?
How do Seamless credits work?
Can I try Seamless for free?