# DataLink APIs

## Docs

- [Contact Intelligence](https://docs.datalinkapis.com/api-reference/contact-intel.md): Validate email, phone, IP, and domain in a single request.
- [Deliverability](https://docs.datalinkapis.com/api-reference/deliverability.md): Deep email deliverability check — SMTP handshake, spam trap detection, and disposable screening.
- [Domain Intelligence](https://docs.datalinkapis.com/api-reference/domain.md): WHOIS data, DNS health, and a composite safety score for any domain.
- [Email Validation](https://docs.datalinkapis.com/api-reference/email.md): Validate email syntax, MX records, and SMTP reachability.
- [Fraud Signals](https://docs.datalinkapis.com/api-reference/fraud-signals.md): Composite fraud risk scoring across email, phone, IP, and domain in one call.
- [IP Intelligence](https://docs.datalinkapis.com/api-reference/ip.md): Geolocation, ISP, and VPN/proxy detection for any IP address.
- [API Reference Overview](https://docs.datalinkapis.com/api-reference/overview.md): All DataLink APIs endpoints at a glance.
- [Phone HLR](https://docs.datalinkapis.com/api-reference/phone.md): Carrier identification and Home Location Register lookup for any phone number.
- [Authentication](https://docs.datalinkapis.com/authentication.md): How to authenticate requests to the DataLink APIs platform.
- [Credits](https://docs.datalinkapis.com/credits.md): How the DataLink APIs credit system works.
- [Errors](https://docs.datalinkapis.com/errors.md): HTTP status codes and error response format.
- [Introduction](https://docs.datalinkapis.com/introduction.md): One API key. Four intelligence bundles. Real-time data on email, phone, IP, and domain.
- [Quick Start](https://docs.datalinkapis.com/quickstart.md): Make your first call to DataLink APIs in under 5 minutes.
- [Rate Limits](https://docs.datalinkapis.com/rate-limits.md): Request rate limits by plan and how to handle 429 responses.

## OpenAPI Specs

- [openapi](https://docs.datalinkapis.com/api-reference/openapi.json)

## Optional

- [Playground](https://datalinkapis.com/playground)
- [Status](https://status.datalinkapis.com)
- [Contact](https://datalinkapis.com/contact)