https://www.twilio.com/en-us/user-authentication-identity/lookup
Lookup API | Twilio
Validate number format and look up provider and device type to reach verified users via voice and text. Free to use.
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https://www.buycott.com/api/docs
Buycott UPC Lookup API
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https://systemd.io/USER_GROUP_API/
User/Group Record Lookup API via Varlink
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https://v.gd/apilookupreference.php
v.gd - URL Lookup API Reference
URL Lookup API Reference (developer documentation)
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https://dns-lookup.whoisxmlapi.com/api
DNS Lookup API to check MX, NS, etc. server records | WhoisXML API
Our DNS checker API helps users check MX, NS, and other server records via API calls with outputs in JSON or XML. Get started with 500 free API queries.
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https://sms.to/hlr-lookup-api/
HLR & MNP Lookup API - SMS.To
Feb 9, 2026 - Know if a number works before you send HLR and MNP Lookup API for smarter routing and lower SMS costs Clean your lists, route every SMS to the right network,...
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https://devs.upcitemdb.com/
UPC Lookup API | UPCitemdb
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https://iplookupapi.com/
IP Lookup API | iplookupapi.com
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https://www.twilio.com/en-us/user-authentication-identity/pricing/lookup
Lookup API Pricing | Twilio
Pay only for what you need with flexible pay-as-you-go pricing for the Twilio Lookup API. Begin your free Twilio trial and start building without commitments.
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https://www.binsearchlookup.com/register
Create Account | Free BIN / IIN Lookup & API Access – Bin Search Lookup
Apr 21, 2026 - Create your free Bin Search Lookup account for instant BIN / IIN lookups and secure API access. Verify card issuers, detect fraud, and access real-time global...
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https://clawskills.sh/skills/phheng-amazon-asin-lookup-api-skill
amazon-asin-lookup-api-skill — OpenClaw Skill | clawskills.sh
This skill helps users extract structured product details from Amazon using a specific ASIN (Amazon Standard.
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https://www.clawcard.sh/catalog/travel/airline-lookup
Airline Lookup API — Look up airline details by name or IATA code | ClawCard
Look up airline details by name or IATA code. $0.01 per call. Powered by AviationStack. No API key needed — just add balance and pay.
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https://edgedns.dev/features/dns-lookup
DNS Lookup API + MCP — Talk to your domains | EdgeDNS
Query 14+ DNS record types, monitor propagation across global resolvers, validate DNSSEC, and detect misconfigurations from Cloudflare's edge.
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https://subdomains.whoisxmlapi.com/api
Subdomains Lookup API | Get a list of subdomains | WhoisXML API
List all the subdomains of a website via API calls in JSON and XML. Each subdomain list contains the total count and timestamps. Get free access today.
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https://www.1lookup.io/products/ip-lookup
IP Lookup API - Geolocation & Threat Intelligence | 1Lookup
Advanced IP intelligence API with precise geolocation, proxy/VPN detection, and risk scoring. Get real-time threat intelligence and geographical data for any...
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https://www.twilio.com/ja-jp/user-authentication-identity/lookup
Lookup API | Twilio
番号形式を検証してプロバイダーと端末種別を検索し、認証済みユーザーに音声とテキストでアプローチします。無料で使用できます。
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https://www.ipqualityscore.com/ip-reputation-check
IP Address Reputation Check | Real-Time Lookup & API
Perform a free IP reputation lookup to identify proxies, bots, or compromised IPs with real-time threat analysis.
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https://www.realvalidito.com/
Phone Number Validator & Lookup API | RealValidito
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https://fuchsia.dev/fuchsia-src/development/internationalization/localization/lookup_api
Lookup API | Fuchsia
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https://routemobile.com/products/messaging/number-lookup/
Number Lookup API: Search & Find Mobile Phone Number
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https://www.tiny.cloud/docs/tinymce/latest/userlookup/
User Lookup API | TinyMCE Documentation
TinyMCE User Lookup provides an API to identify the current user and retrieve user details via integration-defined methods.
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https://maclookup.app/api-v2/libraries
API Client libraries | MAC Address Lookup
To simplify integrations, MACLookup provides REST client libraries for PHP and golang
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https://mac-address.whoisxmlapi.com/lookup
MAC Address Lookup | WhoisXML API
Our MAC address vendor lookup gives all the information encoded in a MAC address.
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https://ipgeolocation.io/contact.html
IP Geolocation API and GeoIP Lookup Location Database Query Form
For IP Geolocation API and database inquiries, feedback, suggestions, or partnership opportunities, contact our team. IPGeolocation team is here to assist you.
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https://www.voilanorbert.com/api/
Email Lookup & Verification API — Norbert
Mar 18, 2019 - Extend Norbert’s email superpowers with flexible APIs. Consult our API Docs to learn more
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https://whois-history.whoisxmlapi.com/lookup
Access domain name history with WHOIS History Lookup | WhoisXML API
Uncover domain name history using WHOIS History Lookup and access 10+ years of WHOIS data with all recorded information on past owners and registrars.
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https://specifications.freedesktop.org/secret-service/latest/lookup-attributes.html
Lookup Attributes | Secret Service API Draft
Attributes can and should be stored with a secret to facilitate lookup of the secret at a later date. An attribute constists of a name, and a value. Both parts...
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https://ipgeolocation.io/timezone-api.html
Time Zone API & Time Conversion Lookup by IP, Coordinates, City, or Code
Time zone API and Time Conversion API provides current time and date information from time zone name, IP Address, geo coordinates, location name, IATA,...
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https://numverify.com/
Numverify API | Numverify API | Phone Number Validation & Phone Lookup API
Numverify API is a powerful JSON API providing international and national phone number validation, carrier, location, and line type lookup for developers.
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https://ipapi.co/
ipapi - IP Address Lookup and Geolocation API | No SignUp
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https://domain-info.whoisxmlapi.com/lookup
Domain Info Lookup: WHOIS for Redaction & Expired Domains | WhoisXML API
Domain Info Lookup replaces masked fields with the latest defined historical WHOIS data, including for expired domains.
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https://snov.io/email-finder-api
Email Finder API | Snovio Email Lookup API
Tap into a vast Snovio database with the Email Finder API. Find and verify email addresses to connect with the right contacts for your outreach.
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https://kalicube.pro/tools/knowledge-graph-explorer-reverse
Knowledge Graph API Reverse Lookup - Use the kgid / kgmid to find and Entity in Google's Knowledge...
Simple interface... No coding skills needed. None. The Kalicube.pro reverse lookup knowledge graph explorer will tell you what entity any kgid (kgmid)...