# 1Lookup

> 1Lookup is a data verification and enrichment platform that AI agents and application code both call directly: over a REST API, or over a hosted MCP server at https://app.1lookup.io/api/mcp. It validates phone numbers, email addresses, IP addresses, and domains, and enriches companies, contacts, and keywords. A single lookup returns structured signals: line type, carrier, HLR reachability, number portability, spam/scam reputation, email deliverability, IP geolocation and VPN/proxy detection, domain authority and backlink profiles, keyword volume/CPC/difficulty, website audience reports, company firmographics, B2B contact data, social profile/post/search/ad-library lookups, video transcripts, and audio transcription. The same engine powers a REST API, a hosted MCP server, a web dashboard with batch CSV validation, and a suite of free, rate-limited browser tools.

This file is a structured index of 1Lookup's public pages for AI and answer engines. A fuller version is at https://www.1lookup.io/llms-full.txt. All descriptions below are factual capability statements; performance figures are intentionally omitted here, see the live pages for current numbers. Plan prices and per-lookup costs are in the Pricing section below.

## Company

1Lookup is built and operated by Momentum Labs (https://www.mlabs.vc/), the venture studio behind VoiceDrop, Emailchaser, 1Capture, Prymatica, TeamPredict, Batmail, ExpressNumber and PaidHype. Parent organization: Momentum Labs.

## Pricing

- Plans, billed monthly: Starter $99 for 20,000 credits, Growth $299 for 85,000 credits, Professional $799 for 250,000 credits, Enterprise $1,999 for 1,000,000 credits. Credits are shared across every product. Full page: https://www.1lookup.io/pricing
- Email validation: 1 credit per check, about $4.95 per 1,000 checks on Starter, $3.52 on Growth, $3.20 on Professional and $2.00 on Enterprise.
- Reverse phone lookup (US numbers): the caller ID name is 10 credits (about $0.05 on Starter, $0.04 on Growth) and the full record is 25 credits (about $0.12 on Starter, $0.09 on Growth). Nothing is charged when no record is found.
- HLR lookup (live network status of a mobile number, any country): 5 credits a lookup, about $24.75 per 1,000 lookups on Starter, $17.60 on Growth, $16.00 on Professional and $9.99 on Enterprise. A number the network reports as not assigned (INVALID_MSISDN) is not charged.
- Caller ID name (CNAM) lookup, US numbers: 10 credits a lookup, about $0.05 on Starter, $0.04 on Growth, $0.03 on Professional and $0.02 on Enterprise.
- Skip trace (a name and US address in, phone numbers out): 10 credits a record searched, about $0.05 on Starter, $0.04 on Growth, $0.03 on Professional and $0.02 on Enterprise.
- Phone scrub (Do-Not-Call and litigator list check): 10 credits a number, about $0.05 on Starter, $0.04 on Growth, $0.03 on Professional and $0.02 on Enterprise.
- Email append (an email address for a name and postal address): 10 credits a lookup, about $0.05 on Starter, $0.04 on Growth, $0.03 on Professional and $0.02 on Enterprise.
- Phone validation and IP lookup: 1 credit a check, about $4.95 per 1,000 checks on Starter, $3.52 on Growth, $3.20 on Professional and $2.00 on Enterprise.

### Cost per lookup, every product

Dollars per 1,000 lookups on each monthly plan, from the plan's price per credit. Credits are shared across every product.

| Product | Credits a lookup | Starter | Growth | Professional | Enterprise |
|---|---|---|---|---|---|
| [Phone Validation](https://www.1lookup.io/products/phone-validation) | 1 | $4.95 | $3.52 | $3.20 | $2.00 |
| [Email Validation](https://www.1lookup.io/products/email-validation) | 1 | $4.95 | $3.52 | $3.20 | $2.00 |
| [IP Intelligence](https://www.1lookup.io/products/ip-lookup) | 1 | $4.95 | $3.52 | $3.20 | $2.00 |
| [Phone Spam Check](https://www.1lookup.io/products/phone-spam-check) | 1 | $4.95 | $3.52 | $3.20 | $2.00 |
| [HLR Lookup](https://www.1lookup.io/products/hlr-lookup) | 5 | $24.75 | $17.60 | $16.00 | $9.99 |
| [Phone Scrub](https://www.1lookup.io/products/phone-scrub) | 10 | $49.50 | $35.20 | $32.00 | $19.99 |
| [Business Verify](https://www.1lookup.io/products/business-verify) | 30 | $148.50 | $105.60 | $96.00 | $59.97 |
| [Reverse Phone Lookup, full record (US)](https://www.1lookup.io/products/reverse-lookup) | 25 | $123.75 | $88.00 | $80.00 | $49.97 |
| [Caller ID name, CNAM (US)](https://www.1lookup.io/products/reverse-lookup) | 10 | $49.50 | $35.20 | $32.00 | $19.99 |
| [Reverse Email Append](https://www.1lookup.io/products/reverse-email-append) | 10 | $49.50 | $35.20 | $32.00 | $19.99 |
| [Email Append](https://www.1lookup.io/products/email-append) | 10 | $49.50 | $35.20 | $32.00 | $19.99 |
| [Skip Trace](https://www.1lookup.io/products/skip-trace) | 10 | $49.50 | $35.20 | $32.00 | $19.99 |
| [Reverse IP Append](https://www.1lookup.io/products/reverse-ip-append) | 10 | $49.50 | $35.20 | $32.00 | $19.99 |
| [Email Enrichment](https://www.1lookup.io/products/email-enrichment) | 5 | $24.75 | $17.60 | $16.00 | $9.99 |
| [Mobile Finder](https://www.1lookup.io/products/mobile-finder) | 40 | $198.00 | $140.80 | $128.00 | $79.96 |
| [LinkedIn Email Finder](https://www.1lookup.io/products/linkedin-email-finder) | 30 | $148.50 | $105.60 | $96.00 | $59.97 |
| [LinkedIn Profile Lookup](https://www.1lookup.io/products/linkedin-profile-lookup) | 10 | $49.50 | $35.20 | $32.00 | $19.99 |
| [B2B Contact Append](https://www.1lookup.io/products/b2b-contact-append) | 75 | $371.25 | $264.00 | $240.00 | $149.92 |
| [Company Profile Lookup](https://www.1lookup.io/products/company-profile-lookup) | 25 | $123.75 | $88.00 | $80.00 | $49.97 |
| [Company Firmographics](https://www.1lookup.io/products/company-firmographics) | 75 | $371.25 | $264.00 | $240.00 | $149.92 |
| [LinkedIn Company Lookup](https://www.1lookup.io/products/linkedin-company-lookup) | 10 | $49.50 | $35.20 | $32.00 | $19.99 |
| [Account Search](https://www.1lookup.io/products/account-search) | 75 | $371.25 | $264.00 | $240.00 | $149.92 |
| [Prospect Search](https://www.1lookup.io/products/prospect-search) | 2 | $9.90 | $7.04 | $6.40 | $4.00 |
| [Business Lookup](https://www.1lookup.io/products/business-lookup) | 10 | $49.50 | $35.20 | $32.00 | $19.99 |
| [Property Lookup](https://www.1lookup.io/products/property-lookup) | 15 | $74.25 | $52.80 | $48.00 | $29.98 |
| [Social Profile Check](https://www.1lookup.io/products/social-profile-check) | 10 | $49.50 | $35.20 | $32.00 | $19.99 |
| [Social Post Lookup](https://www.1lookup.io/products/social-post-lookup) | 5 | $24.75 | $17.60 | $16.00 | $9.99 |
| [Video Transcript](https://www.1lookup.io/products/video-transcript) | 5 | $24.75 | $17.60 | $16.00 | $9.99 |
| [Social Search](https://www.1lookup.io/products/social-search) | 5 | $24.75 | $17.60 | $16.00 | $9.99 |
| [Ad Library Lookup](https://www.1lookup.io/products/ad-library-lookup) | 10 | $49.50 | $35.20 | $32.00 | $19.99 |
| [TikTok Audience Demographics](https://www.1lookup.io/products/tiktok-audience-demographics) | 40 | $198.00 | $140.80 | $128.00 | $79.96 |
| [Link-in-Bio Lookup](https://www.1lookup.io/products/link-in-bio-lookup) | 3 | $14.85 | $10.56 | $9.60 | $6.00 |
| [SERP Scraper](https://www.1lookup.io/products/search-intent-lookup) | 1 | $4.95 | $3.52 | $3.20 | $2.00 |
| [Keyword Metrics](https://www.1lookup.io/products/keyword-metrics) | 6 | $29.70 | $21.12 | $19.20 | $11.99 |
| [Domain Authority](https://www.1lookup.io/products/domain-authority) | 10 | $49.50 | $35.20 | $32.00 | $19.99 |
| [Domain Age](https://www.1lookup.io/products/domain-age) | 2 | $9.90 | $7.04 | $6.40 | $4.00 |
| [Backlink Overview](https://www.1lookup.io/products/backlink-overview) | 13 | $64.35 | $45.76 | $41.60 | $25.99 |
| [Audience Intelligence](https://www.1lookup.io/products/audience-intelligence) | 86 | $425.70 | $302.72 | $275.20 | $171.91 |
| [Website Scraper](https://www.1lookup.io/products/website-scraper) | 10 | $49.50 | $35.20 | $32.00 | $19.99 |
| [Website Contacts Scraper](https://www.1lookup.io/products/website-contacts-scraper) | 10 | $49.50 | $35.20 | $32.00 | $19.99 |

Also billed in credits: Carrier Lookup (1 to 3 credits), Fraud Detection (from 1 credit), Job Change Monitoring (5 credits per contact, weekly), MCP Server (same credits as the API), Audio Transcription (6 credits per minute).

## Live data (updated every weekday)

- [Daily briefing](https://www.1lookup.io/daily): Robocall, TCPA and email deliverability news, published every weekday, with each dated edition kept at its own permalink at https://www.1lookup.io/daily/YYYY-MM-DD.

## Start here for AI agents (MCP)

If you are an AI agent, or building one, this is the connection path:

- Endpoint: https://app.1lookup.io/api/mcp
- Transport: streamable HTTP (SSE is disabled)
- Auth: OAuth 2.1. No API key. Dynamic client registration, PKCE (S256 required),
  and a browser consent screen. Discovery documents:
  https://app.1lookup.io/.well-known/oauth-protected-resource (RFC 9728)
  https://app.1lookup.io/.well-known/oauth-authorization-server (RFC 8414)
- Machine-readable server card: https://www.1lookup.io/.well-known/mcp/server-card.json
- Tools exposed (5): validate_phone, verify_email, ip_lookup, bulk_verify, get_account
- Cost: tool calls spend the same credits as the REST API, one credit per phone, email, or
  IP lookup, and one credit per record for bulk_verify. get_account is free. There is no
  separate MCP fee.
- Requires a paid plan. Free-plan accounts receive HTTP 403 UPGRADE_REQUIRED on every tool
  call. A 7-day trial is available.
- Verified clients: Claude and Cursor. Any client that supports remote MCP over streamable
  HTTP can add the same URL.
- Setup pages: https://www.1lookup.io/mcp/claude and https://www.1lookup.io/mcp/cursor
- Auth reference: https://www.1lookup.io/mcp/oauth
- Overview: https://www.1lookup.io/products/mcp

Everything beyond those five tools (40 data products covering company, B2B contact, SEO,
social, property and transcription data) is available over the REST API at
https://app.1lookup.io/api/v1, not over MCP.

## Machine-readable descriptions of this site and API

- OpenAPI 3.1 description of the REST API: https://www.1lookup.io/openapi.json
  (same document in YAML: https://www.1lookup.io/api/openapi.yaml).
  Servers point at https://app.1lookup.io/api/v1. Auth is `Authorization: Bearer sk_live_...`.
- Every page on www.1lookup.io answers `Accept: text/markdown` with a markdown
  representation of itself, and sends `Vary: Accept` so caches keep the two apart
  (https://acceptmarkdown.com). Request a page with `Accept: text/markdown` to skip
  the HTML.
- Nonexistent paths return a real HTTP 404, and with `Accept: text/markdown` the 404
  body is a short markdown document linking back to these entry points.
- API paths under /api that match no endpoint return a JSON error with a stable
  `error.code`, a `message` and a `resolution` hint, never an HTML page.
- Every response envelope: `{"success": true, "data": {...}}` on success,
  `{"success": false, "error": {"message", "code", "type"}}` on failure.

## Free tools (no signup, rate-limited)

- [Phone Number Lookup](https://www.1lookup.io/tools/phone-number-lookup): Validate any number and see line type, carrier and country.
- [Reverse Phone Lookup](https://www.1lookup.io/tools/reverse-phone-lookup): Find the likely owner and location behind a phone number.
- [Carrier Lookup](https://www.1lookup.io/tools/carrier-lookup): Identify the carrier and network for any phone number.
- [Phone Line Type Lookup](https://www.1lookup.io/tools/phone-line-type-lookup): Free VoIP checker: shows whether a phone number is mobile, landline or VoIP, plus whether it is valid and its country.
- [Spam Number Lookup](https://www.1lookup.io/tools/spam-phone-checker): Look up any number's spam, scam and robocall reputation.
- [HLR Lookup](https://www.1lookup.io/tools/hlr-lookup): Free live HLR lookup: shows whether a mobile number is switched on and reachable right now, plus its country and whether it has been ported.
- [MNP Checker (Mobile Number Portability)](https://www.1lookup.io/tools/phone-portability-lookup): Free MNP checker: shows whether a mobile number has been ported to another network, plus its country and number type.
- [Email Verifier](https://www.1lookup.io/tools/email-verifier): Check if an email is valid, deliverable and safe to send.
- [IP Address Lookup](https://www.1lookup.io/tools/ip-address-lookup): Geolocate any IP, city, ISP, ASN and connection type.
- [What Is My IP](https://www.1lookup.io/tools/what-is-my-ip): Instantly see your public IP, location and ISP.
- [VPN & Proxy Detection](https://www.1lookup.io/tools/vpn-proxy-detection): Detect VPN, proxy, Tor and datacenter IPs.
- [IP Blacklist & Reputation Check](https://www.1lookup.io/tools/ip-blacklist-check): Check an IP's reputation and blocklist status.
- [Domain Authority Checker](https://www.1lookup.io/tools/domain-authority-checker): Check DA, DR, backlinks and estimated traffic.
- [Domain Age Checker](https://www.1lookup.io/tools/domain-age-checker): See exactly when a domain was registered and how old it is.
- [WHOIS Lookup](https://www.1lookup.io/tools/whois-lookup): Registrar, registration and expiry dates, nameservers, DNSSEC and registry status codes, straight from the registry.
- [Social Media Username Checker](https://www.1lookup.io/tools/social-username-checker): See whether a username is already taken on ten networks.
- [Instagram Profile Viewer](https://www.1lookup.io/tools/instagram-profile-viewer): Followers, following, posts and verified status for any public account.
- [TikTok Profile Viewer](https://www.1lookup.io/tools/tiktok-profile-viewer): Followers, following, video count and verified status for any public TikTok account, no TikTok account needed.
- [X (Twitter) Profile Viewer](https://www.1lookup.io/tools/x-profile-viewer): Exact followers, following, post count and the blue checkmark for any public X account, no X account needed.
- [YouTube Channel Viewer](https://www.1lookup.io/tools/youtube-channel-viewer): Subscriber count, video count and the verification badge for any YouTube channel handle.
- [Facebook Profile Viewer](https://www.1lookup.io/tools/facebook-profile-viewer): Follower count and website for any public Facebook Page or profile with a username, no Facebook login needed.
- [Threads Profile Viewer](https://www.1lookup.io/tools/threads-profile-viewer): Follower count and verified badge for any public Threads profile, no Threads or Instagram account needed.
- [Snapchat Profile Viewer](https://www.1lookup.io/tools/snapchat-profile-viewer): Subscriber count and display name for any public Snapchat profile, no Snapchat account needed.
- [Bluesky Profile Viewer](https://www.1lookup.io/tools/bluesky-profile-viewer): Exact followers, following and post count for any Bluesky handle, no Bluesky account needed.
- [Twitch Profile Viewer](https://www.1lookup.io/tools/twitch-profile-viewer): Exact follower count and display name for any Twitch channel, no Twitch account needed.
- [LinkedIn Profile Viewer](https://www.1lookup.io/tools/linkedin-profile-viewer): Headline, current role, location and follower count from any public LinkedIn profile URL, without signing in to LinkedIn.
- [Video Transcript Generator](https://www.1lookup.io/tools/video-transcript-generator): Paste a TikTok, YouTube or Reels link and read what was said.
- [Engagement Rate Calculator](https://www.1lookup.io/tools/engagement-rate-calculator): Fetch a creator's follower count and grade their engagement rate by account size.
- [CPM Calculator](https://www.1lookup.io/tools/cpm-calculator): Solve for cost per 1,000 impressions, total campaign cost or impressions, with an eCPM mode for publishers.
- [YouTube Money Calculator](https://www.1lookup.io/tools/youtube-money-calculator): Estimate a channel's ad earnings per day, month and year from its views and an RPM range.
- [Facebook Ad Library Search](https://www.1lookup.io/tools/facebook-ad-library-search): See the ads any brand is running on Facebook and Instagram.
- [TikTok Ad Library Search](https://www.1lookup.io/tools/tiktok-ad-library-search): Look up the TikTok ads a brand is currently running.
- [ZIP Code Lookup](https://www.1lookup.io/tools/zip-code): The city, state and county behind any of 40,979 US ZIP codes, plus the area codes used there.
- [UTM Builder](https://www.1lookup.io/tools/utm-builder): Build a tagged campaign URL with correct encoding, entirely in the browser.
- [Is This a Scam?](https://www.1lookup.io/tools/is-this-a-scam): Paste any message and get a read on whether it is a scam, with the reasons.
- [Scam Text Message Checker](https://www.1lookup.io/tools/scam-text-message-checker): Check a suspicious SMS for the signs of a smishing scam.
- [Phishing Email Checker](https://www.1lookup.io/tools/phishing-email-checker): Paste a suspicious email and see whether it is phishing.
- [Is This Website Legit?](https://www.1lookup.io/tools/is-this-website-legit): Check whether a site is a real business or a scam storefront.
- [Is This Link Safe?](https://www.1lookup.io/tools/is-this-link-safe): Check where a link really goes, without opening it.
- [Who Called Me?](https://www.1lookup.io/tools/who-called-me): Find out who is behind the number that just called you.
- [Whose Number Is This?](https://www.1lookup.io/tools/whose-number-is-this): Find who a US number is listed to, with the city and state.
- [CNAM Lookup](https://www.1lookup.io/tools/cnam-lookup): See whether a US number has a caller ID name on record, part or all of it, and the city and state.
- [DNC Check](https://www.1lookup.io/tools/dnc-check): See whether a US phone number is on the National Do Not Call Registry before you call it, with its line type and carrier.
- [Reverse Email Lookup](https://www.1lookup.io/tools/reverse-email-lookup): Find out who is behind an email address.
- [US Area Code Lookup](https://www.1lookup.io/tools/area-code): Every US area code, the state and city it covers, and which are toll-free.
- [Area Code Lookup Widget](https://www.1lookup.io/tools/area-code/widget): A free area code lookup box any website can embed with two lines of code, with no account, no cookies and no cost per lookup.
- [Country Codes](https://www.1lookup.io/tools/country-code): All 206 country calling codes, how to dial each one, mobile prefixes, landline area codes and the time there now.
- [DMARC Checker](https://www.1lookup.io/tools/dmarc-checker): See whether anyone can send email pretending to be your domain.
- [SPF Record Checker](https://www.1lookup.io/tools/spf-record-checker): Validate an SPF record and catch the 10-lookup limit that silently breaks it.
- [MX Record Lookup](https://www.1lookup.io/tools/mx-record-lookup): See where a domain's email goes and which provider runs it.
- [DOT Number Lookup](https://www.1lookup.io/tools/dot-number-lookup): Check any trucking company by USDOT number against the FMCSA census.
- [VIN Decoder](https://www.1lookup.io/tools/vin-decoder): Decode any 17-character VIN into year, make, model, engine and plant.
- [NPI Number Lookup](https://www.1lookup.io/tools/npi-lookup): Look up a healthcare provider by NPI in the CMS NPPES registry.
- [All free tools](https://www.1lookup.io/tools): Index of every free 1Lookup tool.

## Products

- [Phone Validation](https://www.1lookup.io/products/phone-validation): Validate a US, Canadian or international phone number and return line type, carrier, country, region, time zone and a risk level; DNC status, reachability and porting cover US and Canada numbers.
- [Carrier Lookup](https://www.1lookup.io/products/carrier-lookup): Identify the carrier/network behind a number.
- [HLR Lookup](https://www.1lookup.io/products/hlr-lookup): Query the Home Location Register for live mobile reachability.
- [Phone Spam Check](https://www.1lookup.io/products/phone-spam-check): Score a number's spam/scam reputation and report history.
- [Reverse Lookup](https://www.1lookup.io/products/reverse-lookup): Resolve owner/location context for a phone number.
- [Email Validation](https://www.1lookup.io/products/email-validation): Verify syntax, domain/MX, deliverability, disposable and role-based addresses.
- [IP Lookup](https://www.1lookup.io/products/ip-lookup): Geolocate IPs and detect VPN/proxy/Tor and connection type.
- [Fraud Detection](https://www.1lookup.io/products/fraud-detection): Combine phone/email/IP signals into a fraud risk score.
- [Domain Authority](https://www.1lookup.io/products/domain-authority): Score a domain's search footprint: authority score, organic/paid keyword counts, estimated traffic and traffic value.
- [Domain Age](https://www.1lookup.io/products/domain-age): When a domain was registered, how old it is, when it expires and its registrar, read from the registry.
- [Backlink Overview](https://www.1lookup.io/products/backlink-overview): Map a domain's link profile: referring domains, total backlinks, follow/nofollow split and Authority Score.
- [Keyword Metrics](https://www.1lookup.io/products/keyword-metrics): Search volume, CPC, difficulty, intent, trend and SERP features for any keyword.
- [Audience Intelligence](https://www.1lookup.io/products/audience-intelligence): Website audience reports: traffic by country, age/income demographics, traffic sources and onward destinations.
- [Prospect Search](https://www.1lookup.io/products/prospect-search): Find people by job title, seniority, location and employer, with per-row contact reveal.
- [Account Search](https://www.1lookup.io/products/account-search): Find companies by headcount, revenue, location and technology, up to 100 per search.
- [Company Firmographics](https://www.1lookup.io/products/company-firmographics): Turn a company domain into a full profile: industry, SIC/NAICS, headcount, revenue and tech stack.
- [B2B Contact Append](https://www.1lookup.io/products/b2b-contact-append): Verified work email, title and seniority from a name plus company, an email, or a LinkedIn URL.
- [Business Verify](https://www.1lookup.io/products/business-verify): One check answering whether a business is real, open and reachable: live business-listing data blended with phone and email validation into a 0-100 verification score. Only charged when the business is found.
- [Business Lookup](https://www.1lookup.io/products/business-lookup): Business name and city in; address, phone, website, category, star rating, review count, hours and open/closed status out. Only charged on a match.
- [Company Profile Lookup](https://www.1lookup.io/products/company-profile-lookup): Company domain in; profile from professional network data out: industry, size, headquarters, founding year, specialties and funding history. Only charged on a match.
- [LinkedIn Email Finder](https://www.1lookup.io/products/linkedin-email-finder): Public LinkedIn profile URL in; a verified work email out, plus full name, job title, company and location. 30 credits, charged only on a match.
- [Social Profile Check](https://www.1lookup.io/products/social-profile-check): Handle in on Instagram, TikTok, YouTube, X/Twitter, Facebook, Threads, Twitch, Snapchat, Bluesky or Truth Social; followers, engagement, verified and business flags out, from public social profiles. Only charged on a match.
- [Social Post Lookup](https://www.1lookup.io/products/social-post-lookup): Post or video URL in (Instagram, TikTok, YouTube, X/Twitter, Facebook, Threads, Bluesky, Truth Social, Pinterest, LinkedIn); caption, author, likes, comments, shares, views and posted date out. Only charged on a match.
- [Video Transcript](https://www.1lookup.io/products/video-transcript): Video URL in (TikTok, Instagram, YouTube, X, Facebook, LinkedIn, Reddit); the full spoken transcript out as text. Only charged when a transcript is found.
- [Social Search](https://www.1lookup.io/products/social-search): Platform plus keyword in (Instagram, TikTok, YouTube, Threads, Pinterest, Reddit); matching public profiles and content out, one page of results per search. Empty searches are free.
- [Ad Library Lookup](https://www.1lookup.io/products/ad-library-lookup): Company name or keyword in; the ads it is running out, from the public ad libraries of Meta/Facebook, TikTok, LinkedIn and Google. Only charged when ads are found.
- [TikTok Audience Demographics](https://www.1lookup.io/products/audience-demographics): TikTok handle in; follower countries out, each with its ISO code and percentage share of the audience. Country shares only; no gender or age data. Only charged on a match.
- [Link-in-Bio Lookup](https://www.1lookup.io/products/link-in-bio-lookup): Linktree, Komi, Pillar, Lnk.bio or Linkme URL in; every link plus profile info out. Only charged on a match.
- [Property Lookup](https://www.1lookup.io/products/property-lookup): US address in; beds, baths, square footage, year built, listing status and last sale out, from public real-estate listing data. Only charged on a match.
- [Job Change Monitoring](https://www.1lookup.io/products/job-change-monitoring): Watch a contact list and receive an event when someone changes company or title, rechecked weekly.
- [Audio Transcription](https://www.1lookup.io/products/bulk-audio-transcription): Transcribe audio/video URLs with word timestamps and speaker labels, billed per minute.
- [SERP Scraper](https://www.1lookup.io/products/search-intent-lookup): Scrape Google search results, organic listings, knowledge panels and related searches.
- [Website Scraper](https://www.1lookup.io/products/website-scraper): Turn any URL into clean, structured content for AI workflows.
- [Website Contacts Scraper](https://www.1lookup.io/products/website-contacts-scraper): Extract emails, phones and social profiles from any domain.
- [Email Append](https://www.1lookup.io/products/email-append): Append email addresses from name + postal address inputs.
- [Reverse Email Append](https://www.1lookup.io/products/reverse-email-append): Identity enrichment from an email address.
- [Reverse IP Append](https://www.1lookup.io/products/reverse-ip-append): Contact and geo intelligence from an IP address.
- [Phone Scrub](https://www.1lookup.io/products/phone-scrub): DNC status, line type and risk flags for outreach lists.
- [Skip Trace](https://www.1lookup.io/products/skip-trace): Skip tracing API: a name and US address in, a phone number with its line type and a Do Not Call flag out; 10 credits a record, by API or CSV upload.
- [MCP Server](https://www.1lookup.io/products/mcp): Hosted MCP endpoint over OAuth 2.1 giving Claude, Cursor and other MCP clients five tools: validate_phone, verify_email, ip_lookup, bulk_verify, get_account.
- [All products](https://www.1lookup.io/products): Index of every 1Lookup product.

## Compare

- [1Lookup vs Numverify](https://www.1lookup.io/compare/numverify)
- [1Lookup vs Twilio Lookup](https://www.1lookup.io/compare/twilio-lookup)
- [1Lookup vs Melissa](https://www.1lookup.io/compare/melissa)
- [1Lookup vs Telesign](https://www.1lookup.io/compare/telesign)
- [1Lookup vs Veriphone](https://www.1lookup.io/compare/veriphone)
- [1Lookup vs Abstract API](https://www.1lookup.io/compare/abstract-api)
- [1Lookup vs Vonage (Nexmo)](https://www.1lookup.io/compare/nexmo)
- [1Lookup vs HLR Lookup](https://www.1lookup.io/compare/hlrlookup)
- [1Lookup vs Loqate](https://www.1lookup.io/compare/loqate)
- [1Lookup vs Smarty](https://www.1lookup.io/compare/smarty)
- [1Lookup vs ZeroBounce](https://www.1lookup.io/compare/zerobounce)
- [1Lookup vs NeverBounce](https://www.1lookup.io/compare/neverbounce)
- [1Lookup vs Kickbox](https://www.1lookup.io/compare/kickbox)
- [1Lookup vs Emailable](https://www.1lookup.io/compare/emailable)
- [1Lookup vs DeBounce](https://www.1lookup.io/compare/debounce)
- [1Lookup vs Clearout](https://www.1lookup.io/compare/clearout)
- [1Lookup vs Bouncer](https://www.1lookup.io/compare/bouncer)
- [1Lookup vs BriteVerify](https://www.1lookup.io/compare/briteverify)
- [1Lookup vs Mailgun](https://www.1lookup.io/compare/mailgun)
- [1Lookup vs QuickEmailVerification](https://www.1lookup.io/compare/quickemailverification)
- [1Lookup vs EmailListVerify](https://www.1lookup.io/compare/emaillistverify)
- [1Lookup vs EmailListValidation](https://www.1lookup.io/compare/emaillistvalidation)
- [1Lookup vs IPinfo](https://www.1lookup.io/compare/ipinfo)
- [1Lookup vs ipstack](https://www.1lookup.io/compare/ipstack)
- [1Lookup vs ipapi](https://www.1lookup.io/compare/ipapi)
- [1Lookup vs MaxMind](https://www.1lookup.io/compare/maxmind)
- [1Lookup vs IP2Location](https://www.1lookup.io/compare/ip2location)
- [1Lookup vs Lookups.io](https://www.1lookup.io/compare/lookups-io)
- [1Lookup vs Similarweb](https://www.1lookup.io/compare/similarweb): Pay-per-report audience data vs analytics packages.
- [1Lookup vs ZoomInfo](https://www.1lookup.io/compare/zoominfo): Self-serve pay-as-you-go B2B data vs annual seat contracts.
- [1Lookup vs Lusha](https://www.1lookup.io/compare/lusha): Per-lookup contact data vs per-seat plans.
- [1Lookup vs Clearbit](https://www.1lookup.io/compare/clearbit): Standalone enrichment after Clearbit's HubSpot sunset.
- [1Lookup vs Prospeo](https://www.1lookup.io/compare/prospeo): Per-lookup contact data vs per-seat plans whose credits expire each cycle.
- [1Lookup vs FullEnrich](https://www.1lookup.io/compare/fullenrich): One synchronous call per contact vs an asynchronous waterfall answered by webhook.
- [1Lookup vs Anymail Finder](https://www.1lookup.io/compare/anymailfinder): Phone, email and IP on the same credits vs an email-only subscription.
- [1Lookup vs Social Blade](https://www.1lookup.io/compare/social-blade)
- [1Lookup vs HypeAuditor](https://www.1lookup.io/compare/hypeauditor)
- [1Lookup vs Modash](https://www.1lookup.io/compare/modash)
- [1Lookup vs Apify](https://www.1lookup.io/compare/apify)
- [1Lookup vs Phyllo](https://www.1lookup.io/compare/phyllo)
- [All comparisons](https://www.1lookup.io/compare): Index of every competitor comparison.

## Best tools, ranked

- [Best tools hub](https://www.1lookup.io/best): Ranked top 10 lists, each rival's price and terms read from its own pages.
- [The 10 best email verification tools](https://www.1lookup.io/best/email-verification-tools): Ranked on price per 1,000 at the smallest purchase, free credits and what else one account checks.
- [The 10 best free reverse phone lookup sites](https://www.1lookup.io/best/reverse-phone-lookup): Ranked on what the free result shows, what you must hand over to see it, and how a full report is billed.
- [The 10 best phone validation and HLR lookup APIs](https://www.1lookup.io/best/phone-validation-hlr-apis): Ranked on what one check returns, live HLR on the same account, and email and IP checks on the same key.
- [The 10 best HLR lookup services](https://www.1lookup.io/best/hlr-lookup-services): Ranked on what one live lookup returns, roaming, whether a number the network rejects is charged and whether a list runs by upload or API.
- [The 10 best IP geolocation APIs](https://www.1lookup.io/best/ip-geolocation-apis): Ranked on proxy, VPN and datacenter data, which plan carries it, and email and phone checks on the same key.
- [The 10 best skip tracing services](https://www.1lookup.io/best/skip-tracing-services): Ranked on what a search returns, which number checks come with it, how it bills and whether a list runs by upload or API.
- [The 10 best DNC scrubbing services](https://www.1lookup.io/best/dnc-scrubbing-services): Ranked on which Do Not Call lists a scrub checks, litigator flags, how it bills and whether a list runs by upload or API.
- [The 10 best contact enrichment APIs](https://www.1lookup.io/best/contact-enrichment-apis): Ranked on what a lookup returns, whether a lookup that finds no one is charged, how it bills and how you can start free.

## Rival pages: pricing, alternatives, coupons and reviews

- [Coupons and discounts hub](https://www.1lookup.io/coupons): 1Lookup's 7-day free trial first, then each data tool's own published deals, read on its own site with the date.
- [BatchData pricing](https://www.1lookup.io/compare/batchdata): BatchData's property data and skip tracing plans, read on its own pricing page, and how 1Lookup's skip trace compares.
- [BatchData alternatives](https://www.1lookup.io/alternatives/batchdata): Skip tracing services compared on what a trace returns, which number checks come with it and how a list runs.
- [BatchData coupons and discounts](https://www.1lookup.io/coupons/batchdata): 1Lookup's 7-day free trial first, and BatchData's own plan terms, checked October 2026.
- [BatchData reviews](https://www.1lookup.io/reviews/batchdata): Reviewer scores with sample sizes, the top praise and complaints, and how 1Lookup handles each complaint.
- [BeenVerified pricing](https://www.1lookup.io/compare/beenverified): BeenVerified's membership prices, read on its own pricing page, and how 1Lookup's per-record reverse phone lookup compares.
- [BeenVerified alternatives](https://www.1lookup.io/alternatives/beenverified): Reverse phone lookup sites compared on what a search shows, what it asks for and how it bills.
- [BeenVerified coupons and discounts](https://www.1lookup.io/coupons/beenverified): 1Lookup's 7-day free trial first, then BeenVerified's own published deals, checked October 2026.
- [BeenVerified reviews](https://www.1lookup.io/reviews/beenverified): Reviewer scores with sample sizes, the top praise and complaints, and how 1Lookup handles each complaint.
- [PropStream pricing](https://www.1lookup.io/compare/propstream): PropStream's plans and add-ons, read on its own pricing page, and how 1Lookup's skip trace compares.
- [PropStream alternatives](https://www.1lookup.io/alternatives/propstream): Skip tracing services compared on what a trace returns, which number checks come with it and how a list runs.
- [PropStream reviews](https://www.1lookup.io/reviews/propstream): Reviewer scores with sample sizes, the top praise and complaints, and how 1Lookup handles each complaint.
- [Spokeo alternatives](https://www.1lookup.io/alternatives/spokeo): Reverse phone lookup sites compared on what a search shows, what it asks for and how it bills.
- [Spokeo reviews](https://www.1lookup.io/reviews/spokeo): Reviewer scores with sample sizes, the top praise and complaints, and how 1Lookup handles each complaint.
- [DealMachine pricing](https://www.1lookup.io/compare/dealmachine): DealMachine's per-seat plans, read on its own pricing page, and how 1Lookup's skip trace compares.
- [DealMachine reviews](https://www.1lookup.io/reviews/dealmachine): Reviewer scores with sample sizes, the top praise and complaints, and how 1Lookup handles each complaint.
- [Truecaller alternatives](https://www.1lookup.io/alternatives/truecaller): Ways to look up a US number on the web, compared on what a search shows, what it asks for and how it bills.
- [Truecaller coupons and discounts](https://www.1lookup.io/coupons/truecaller): 1Lookup's 7-day free trial first, then Truecaller's own yearly price, checked October 2026.
- [Truecaller reviews](https://www.1lookup.io/reviews/truecaller): Reviewer scores with sample sizes, the top praise and complaints, and how 1Lookup handles each complaint.
- [BatchLeads pricing](https://www.1lookup.io/compare/batchleads): BatchLeads' monthly plans and add-ons, read on its own pricing page, and how 1Lookup's skip trace compares.
- [BatchLeads coupons and discounts](https://www.1lookup.io/coupons/batchleads): 1Lookup's 7-day free trial first, then BatchLeads' own published deals, checked October 2026.
- [BatchLeads reviews](https://www.1lookup.io/reviews/batchleads): Reviewer scores with sample sizes, the top praise and complaints, and how 1Lookup handles each complaint.
- [Whitepages alternatives](https://www.1lookup.io/alternatives/whitepages): Reverse phone lookup sites compared on what a search shows, what it asks for and how it bills.
- [Whitepages reviews](https://www.1lookup.io/reviews/whitepages): Reviewer scores with sample sizes, the top praise and complaints, and how 1Lookup handles each complaint.
- [REsimpli pricing](https://www.1lookup.io/compare/resimpli): REsimpli's plans and add-ons, read on its own pricing page, and how 1Lookup's skip trace compares.
- [REsimpli reviews](https://www.1lookup.io/reviews/resimpli): Reviewer scores with sample sizes, the top praise and complaints, and how 1Lookup handles each complaint.
- [Emailable reviews](https://www.1lookup.io/reviews/emailable): Reviewer scores with sample sizes, the top praise and complaints, and how 1Lookup handles each complaint.
- [ZeroBounce coupons and discounts](https://www.1lookup.io/coupons/zerobounce): 1Lookup's 7-day free trial first, then ZeroBounce's own published promo code and discounts, checked October 2026.
- [NeverBounce coupons and discounts](https://www.1lookup.io/coupons/neverbounce): 1Lookup's 7-day free trial first, then NeverBounce's own published offer, checked October 2026.

## Research (original data)

- [Research index](https://www.1lookup.io/research): First-party platform numbers and public-data studies, each with its method and sample size stated.
- [The State of Email Authentication, September 2026](https://www.1lookup.io/research/email-authentication-2026): SPF, DMARC, DKIM, BIMI, MTA-STS and TLS-RPT on the 5,000 most-visited domains plus a long-tail band, with a per-domain CSV.
- [Contact data quality on the 1Lookup platform](https://www.1lookup.io/research/contact-data-quality): The share of numbers, emails and IPs coming back invalid, VoIP, disposable or anonymised across every lookup in the last 30 days. Aggregate only, refreshed hourly.
- [Daily briefing](https://www.1lookup.io/daily): Weekday robocall, TCPA and deliverability news anchored on the platform's daily line-type numbers.

## Key pages

- [Pricing](https://www.1lookup.io/pricing): Current plans, credit pricing, and per-product credit costs.
- [Industries](https://www.1lookup.io/industries): How 1Lookup is used per industry.
- [Use cases](https://www.1lookup.io/use-cases): Fraud prevention, lead-list cleaning, SMS deliverability, onboarding verification.
- [Alternatives guides](https://www.1lookup.io/alternatives): Honest, verified-pricing shortlists of alternatives to major validation vendors.
- [Integrations](https://www.1lookup.io/integrations): Connect 1Lookup to CRMs, automation platforms, and data tools.
- [Glossary](https://www.1lookup.io/glossary): Definitions of phone, email, IP, SEO, and B2B data terms.
- [Blog](https://www.1lookup.io/blog): Guides on phone/email/IP validation, deliverability, SEO data, and B2B enrichment.
- [About](https://www.1lookup.io/about)
- [Contact](https://www.1lookup.io/contact)

## Optional

- [App / dashboard](https://app.1lookup.io): Sign in, single and batch lookups, API keys.
- [API documentation](https://app.1lookup.io/api): REST API reference.