Free trial
A 7-day free trial is offered with no contracts and cancellation at any time. A Start For Free signup is available from the homepage.
Learn more1Lookup
One API for phone, email, IP and social data checks
Intermediate API
What is 1Lookup?
1Lookup is a developer tool. 1Lookup offers 43 data products behind one API key and shared credits, covering phone, email and IP validation, contact enrichment, social lookups and SEO metrics. It includes an MCP server for AI agents and a 7-day free trial.
1Lookup is a data API platform that bundles 43 lookup products behind a single API key and a shared credit balance. The catalog covers validation (phone, email, IP, spam checks, HLR, carrier and fraud detection), enrichment (email append, reverse lookups, skip trace, LinkedIn and company data), social and ad-library lookups, and SEO intelligence such as domain authority, keyword metrics and backlink overviews. Transcription and job change monitoring sit in the same suite. The service is aimed at developers, data teams and AI agent builders who need verified contact and web data inside their own code. Typical buyers include lead generation shops, call centers, debt collection teams, marketing agencies, financial services firms and e-commerce operators, all of which have dedicated industry pages on the site. Each lookup consumes credits, and the homepage lists one credit for a standard phone, email or IP check, with validation answers advertised in under 0.3 seconds. In practice, a user signs up, receives an API key and calls the endpoint for the product they need. A phone check, for example, returns line type, carrier, reachability, porting status, Do-Not-Call listing, time zone and a risk level. Email checks run syntax, MX and live SMTP verification and flag disposable and role addresses. The dashboard shows remaining credits, daily lookups, success rate, API keys and usage charts, and it also offers quick single lookups and batch uploads without writing code. An MCP server lets AI agents call the same data directly, and the site lists connections to tools such as Twilio, HubSpot, Shopify and Salesforce. A set of free web tools covers one-off checks. Among alternatives, 1Lookup competes with single-purpose vendors such as Twilio Lookup, Numverify, ZeroBounce, NeverBounce, MaxMind and Clearbit, and the site publishes comparison pages against them. Its pitch is consolidation: one balance and one integration instead of several subscriptions, with per-lookup pricing and credits that roll over for three months.
How do you use 1Lookup?
1Create an account
Sign up for the 7-day free trial from the homepage. The trial needs no contract and setup is described as taking about five minutes.2Browse the product catalog
Review the 43 products grouped into validation, enrichment, social and intelligence, and pick the lookups that match your workflow.3Try a phone or email check
Open a validation product to see the response fields, such as line type, carrier and risk level for phone numbers or SMTP results for email.4Generate an API key
Inside the dashboard, create a production key and call the endpoints from your code. Monitor credits, daily lookups and success rate there.5Connect an AI agent
Use the MCP server so an agent can call the same lookups as tools, instead of writing custom API wrappers.
Pros and cons
Pros
- 43 data products share one API key and one credit balance, which cuts vendor sprawlAI
- Validation responses are advertised in under 0.3 seconds, suitable for real-time checksAI
- MCP server lets AI agents call the lookups directlyAI
- Dashboard supports quick lookups and batch uploads as well as API useAI
- Free web tools and published competitor comparisons make it easy to test and evaluateAI
Cons
- Breadth is large, so depth in any single category may trail specialist vendorsAI
- Per-lookup credit pricing can become hard to forecast at high volumesAI
- Phone data emphasizes US and Canada, with international coverage described more looselyAI
- Skip trace and reverse lookup products raise privacy and compliance duties for the buyerAI
- Social proof on the homepage is thin: a Trustpilot score and unspecified lookup countsAI
How much does 1Lookup cost?
Pricing
Priced per lookup using a universal credit balance shared across all products. A standard phone, email or IP check costs 1 credit, and credits roll over for 3 months. Full plan tiers are not detailed on the homepage.
Learn moreSupport
Offers API documentation, an FAQ, a glossary, a contact page, a blog and a sales demo option. Support hours and response times are not stated on the homepage.
Integrations
Lists Twilio, HubSpot, Shopify and Salesforce among its integrations, plus a REST API and an MCP server for AI agents. A dedicated integrations page covers more.
Features
Phone validation with carrier, porting, DNC and risk data; email validation with SMTP and disposable detection; IP proxy and VPN detection; spam scoring; HLR; enrichment; social and ad lookups; SEO metrics; transcription; batch upload; API and MCP server.
Learn moreFrequently asked questions about 1Lookup
How much does 1Lookup cost?
Priced per lookup using a universal credit balance shared across all products. A standard phone, email or IP check costs 1 credit, and credits roll over for 3 months. Full plan tiers are not detailed on the homepage.Does 1Lookup offer a free trial?
A 7-day free trial is offered with no contracts and cancellation at any time. A Start For Free signup is available from the homepage.Does 1Lookup have an API?
Yes, 1Lookup offers an API.How do you use 1Lookup?
The walkthrough on this page covers 5 steps: 1. Create an account 2. Browse the product catalog 3. Try a phone or email check 4. Generate an API key 5. Connect an AI agent.What platforms does 1Lookup support?
1Lookup is available on Web App.What does 1Lookup integrate with?
Lists Twilio, HubSpot, Shopify and Salesforce among its integrations, plus a REST API and an MCP server for AI agents. A dedicated integrations page covers more.
