Instead of buying a phone validator from one vendor, an email checker from another, and an IP intelligence service from a third — 1Lookup gives you all three through a single API with one credit system. Sub-300ms response times. ₹3.3Cr last 30 days on TrustMRR. 90% cheaper than legacy verification platforms like Twilio Lookup.
1Lookup's positioning is consolidation — instead of managing three separate vendor contracts, three API keys, and three billing cycles, developers run all data verification through one endpoint and pay from one credit pool. The breadth-under-one-key pitch is what differentiates it from specialists like Twilio (phone-only) or ZeroBounce (email-only).
One key. No separate credentials for phone vs. email vs. IP. All lookups are debited from a shared credit pool — simple to track and budget for.
Phone: returns whether the number is active, the carrier, line type (mobile/VoIP/landline), fraud risk score, and DNC status. Email: verifies deliverability, catches disposables. IP: detects VPNs, proxies, and risky geolocations.
Not just a pass/fail — a full structured JSON with fraud score, carrier details, risk flags, and compliance signals. Developers use this to block fraud at signup, scrub marketing lists, or enrich CRM data in real time.
Teams can monitor their API usage, see which validation types are being called most, and get alerted when credits are running low — all without building internal monitoring tooling.
India's B2B outreach and marketing industry is enormous — millions of telemarketers, cold emailers, and WhatsApp marketing agencies all sending at scale. The data quality problem (fake leads, DND violations, disconnected numbers) is massive, and the solutions are either too expensive or not India-specific.
Scoped to phone and email validation only for v1 — skip IP/domain for the first weekend. One API, two validation types, one credit system, with a WhatsApp number check as the India-specific differentiator.
Developer dashboard and the API routing logic in one framework.
Stores developer accounts, API keys (hashed), credit balances, and lookup logs.
Real carrier data for Indian and international numbers — Indian carrier freshness is the moat.
Verifies whether a given mobile number has an active WhatsApp account — the India-specific killer feature.
Cross-references Indian phone numbers against India's Do Not Disturb registry — mandatory for any Indian marketer calling at scale.
Rupee-priced credit packs — pay-as-you-go, no monthly subscription required.
Where: Vercel for the app, Supabase for the database. The data quality of the underlying phone validation source is the entire product — invest time upfront researching which provider has the freshest Indian carrier data before building around it.
This prompt sets up the full build context so the AI scopes, plans, and starts coding the project with you from message one.