LookValid Data validation API, free tools
Overview
What it does
for you
Validate and enrich emails, phone numbers, IP addresses, and domains with one API key and one credit balance.
Visit LookValidSeparate product account
LookValid has its own website, account, and plans, so you sign up for it on its own site.
A named source behind every answer
Each lookup reads a named source, and the response lists it, so attribution can sit next to the result.
An MCP server for agents
The same lookups are tools on the LookValid MCP server, so an AI agent can call them the way your code does.
Free tools
13 of the 14 live lookups are also free tools that run with no account, on the same data as the API.
Repeats are free for up to 7 days
When your account runs the same lookup again inside its window, the saved answer comes back at no charge.
Support
Pricing, docs
and support
See the LookValid plans and what they include, read how it works, and know where to get help before you sign up.
Email LookValid supportA clear way to get help
Write to hello@lookvalid.com with any question about LookValid, or to hello@meralume.com with questions about the portfolio.
Product documentation
Read how LookValid works and decide whether it fits your needs.
API
One key,
every lookup
Call any live lookup with one API key and get JSON back. Every product draws on the same credit balance.
Ask about the APIOne request, one JSON answer
Each response says whether something was found and lists its sources, so attribution can sit next to the result.
Errors that say what to fix
Every error carries a code, whether a retry will help and a link to the page for that code.
REST or MCP, one balance
A lookup over MCP uses the same key and the same credit balance as the same lookup over REST.
Billing
Pay for answers,
not attempts
Most lookups charge only when they find something, and the same lookup run again inside its window is free. Every product draws on one credit balance.
Ask about creditsEvery response says what it charged
The answer carries the credits it used and the balance left, so your own records can match ours.
Site files
See what crawlers
and agents read
The Site Files Checker reads robots.txt, sitemaps, llms.txt, security.txt and ai.txt on any site and explains each one in plain words, using only files any visitor can open.
Ask about the checkerOne call for six files
A file that is missing or cannot be reached is reported as such, and a site that cannot be reached costs nothing.
Every known AI crawler, by name
The checker reports what robots.txt says to each of the 20 AI crawlers it knows, grouped by what each one is for.
The rule behind each answer
Each answer names the part of robots.txt that decided it: the crawler's own group, the * group, or none at all.
Agent files
Readable by people
and by agents
Product information is also available in machine-readable formats.
Read this page as markdownMarkdown twin
This page is also served as markdown and listed in llms.txt.
AI voicemail drops for sales
VoiceDeliverCard checks at trial signup
TrialValidCold email that books meetings
ColdMeetingsAI blog autopilot for SEO
BlogAutoPost
Check each signup email and phone with one LookValid key, so bad data stays out of your CRM.
Growth engineersWith LookValidClean a whole contact list on one LookValid credit balance.
Data teamsWith LookValid
Focused software for sales, marketing, and everyday operations.
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