For Developers

Security APIs that don't
get in your way

10 free security APIs. No credit card. No rate-limit surprise. Ship threat detection in your next deploy.

Get free API keyRead the docs
# Check an IP in one curl
curl -H "X-API-Key: dk_your_key" \
  https://api.darkapi.io/v1/ip/1.2.3.4

# Response
{
  "ip": "1.2.3.4",
  "risk_score": 87,
  "threat_feeds": ["abuse.ch", "emergingthreats"],
  "country": "RU",
  "is_tor": false,
  "is_vpn": true
}

10 free APIs, no credit card

Everything resets at UTC midnight. Upgrade to Pro for 100× higher limits.

Hash Lookup100/day

SHA-256 malware hash database

IP Reputation100/day

19+ threat feed score

Domain Intelligence100/day

DNS records + reputation

URL Scanner20/day

Phishing & malware detection

Password Breach Check50/day

K-anonymity HIBP-style

SSL/TLS Checker50/day

Cert validation + expiry

CVE Lookup50/day

Full NVD + CISA KEV data

Email Header Analyzer25/day

SPF/DKIM/DMARC parsing

ASN Lookup100/day

BGP routing + org info

Geolocation100/day

IP → country/city/ASN

7 security APIs, one key away

Upgrade to Pro to unlock identity exposure, guardrails, reputation, and more.

Identity & Breach Exposure

Check whether an email or identity is exposed in known breaches, with bulk lookup for entire domains.

/v1/identity/exposure
RansomWatch

Watch domains and brand names for mentions on ransomware leak sites, with a live sightings feed.

/v1/ransomwatch/scan
Guardrail

Scan prompts and AI-generated messages for policy violations, jailbreaks, and unsafe content before they ship.

/v1/guardrail/scan
ExecProtect

Monitor named executives for impersonation and targeted threats, with one-click takedown requests.

/v1/execprotect/scan
Package Supply-Chain

Check npm, PyPI, and Go packages for supply-chain risk before you install them, individually or in bulk.

/v1/packages/check
Reputation

Monitor brand and domain reputation, log hits as they occur, and request takedowns directly from the API.

/v1/reputation/monitor
Compliance Posture

Track compliance controls and an overall posture score across SOC 2, ISO 27001, GDPR, HIPAA, and PCI DSS.

/v1/compliance/posture

Ship the Developer Firewall in one import

14+ rule types — bot detection, rate limiting, geo/ASN blocking, and sensitive-info (PII) detection — decided in milliseconds via /v1/firewall/decide.

SDKs:Node.jsPythonGoJava
Explore the Developer Firewall →

One key, every module

Hash lookup, IP reputation, CVE details, dark web scan — all on the same key. No juggling multiple vendor accounts.

Predictable pricing

Free tier resets daily. Pro is $49/mo flat. No per-query pricing surprises. Budget it like any SaaS tool.

SDK + curl-friendly

Every endpoint works with a simple HTTP GET or POST. JSON in, JSON out. Python, JS/Node, Go, and Java SDKs available.

Ready to add threat intel to your app?

Free forever. Upgrade when you need more than 100 req/day.

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