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What is a Dark Web API?

A Dark Web API gives you programmatic access to continuously updated data from dark web marketplaces, hacker forums, data breaches, and malware-infected devices. When you integrate Breachsense APIs into your security stack, you can automatically monitor for exposed credentials and stolen data.

Dark Web APIs eliminate manual monitoring by delivering structured data through secure REST API endpoints. You can create automated workflows that detect when your sensitive information appears on the dark web. These workflows validate compromised credentials against your user databases. They trigger password resets or terminate leaked session tokens before attackers exploit them.

Coverage includes non-human identities too. Infostealers harvest API keys, OAuth tokens, and service account secrets from infected employee devices alongside user passwords.

The API can also monitor your third-party vendors for security incidents like ransomware attacks. Attackers may compromise your vendor’s systems and leak your data as part of their breach. Automating dark web monitoring helps you catch supply chain exposure early.

Why Automate Dark Web Monitoring?

Instant Automated Remediation

Trigger password resets and terminate session tokens the moment leaked credentials appear on the dark web. Automate incident response workflows to stop attacks before exploitation.

REST API Integration

Integrate dark web intelligence directly into your SIEM, SOAR, or security tools. Query leaked credentials and breach files programmatically. Consume JSON responses for custom workflows.

Scale Without Headcount

Monitor thousands of assets and credentials 24/7 without adding security staff. One API call replaces hours of manual dark web searching.
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What You Can Build With the Breachsense API

The API powers more than just credential lookups. Here are four common builds and the data flows behind them.

  • SIEM / SOAR ENRICHMENT

    Auto-enrich detections with breach context

    Your SIEM fires on a suspicious login. Your SOAR playbook checks the API for matching credentials or tokens and auto-escalates.

    Endpoints + data:
    Leaked credentials and session tokensLeaked non-human identifiersInfostealers.
  • MSP WHITE-LABEL DASHBOARDS

    Custom dashboards for client portals

    You deliver dark web monitoring under your own brand. Pull from the API into a white-labeled portal with per-client isolation.

    Endpoints + data:
    Bulk domain queriesper-domain webhooksJSON output. See MSP plans.
  • AUTOMATED REMEDIATION

    Trigger credential rotation automatically

    When the API returns a fresh leaked password, your script calls Okta, Entra, or Google and forces a reset. Same flow for session tokens.

    Endpoints + data:
    Webhook push on new findingscredential and session token endpointsJSON payload with user identifier.
  • THREAT HUNTING & RED TEAM

    Hunt and offensive tooling

    Red teamers find valid plaintext credentials for in-scope domains. Threat hunters search leak file dumps for supply chain exposure.

    Endpoints + data:
    Full-text leak file searchhacker forum mentionsplaintext credential queries by domain.

How the Breachsense API Compares

Most teams considering an API have looked at building their own scrapers or buying a generic threat feed. Here's how those options stack up against Breachsense for the work most security teams actually need to do.

CapabilityBreachsense APIBuilding scrapers in-houseGeneric threat intel feeds
Corporate domain queries (not just personal email)IncludedYou build itVaries by vendor
Stealer log details (malware family, source URL)IncludedYou build itVaries by vendor
Full-text search across leaked files from ransomware attacksIncludedHeavy liftVaries by vendor
Leaked session token detectionIncludedHard to sourceVaries by vendor
API key and OAuth token detection (NHIs)IncludedHard to sourceVaries by vendor
Hacker forum mentions and access listingsIncludedAccess-gatedVaries by vendor
Query rate limitsHigh (scales with plan)None (your infra)Varies by vendor
Response payload depthRich metadataYou defineAggregated
Webhooks on new findingsIncludedYou build itVaries by vendor
JSON outputIncludedYou build itVaries by vendor

How Does the Breachsense API Work?

Get Your API Key

Query Credentials & Leaked Files

Parse JSON Responses

Automate Remediation

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Frequently Asked Questions

A dark web API gives you programmatic access to data from dark web marketplaces, data breaches, and malware-infected devices. Instead of manually searching dark web sources, you query a REST endpoint and get structured JSON back. You can search for leaked credentials, run full-text searches on ransomware file dumps, and monitor vendor domains for exposure. The API plugs into your existing security tools so you can automate detection and response.
The API covers leaked credentials from data breaches and infostealer malware, including plaintext passwords and session tokens. You can also search leaked files from ransomware attacks by company name or employee name. The API returns structured data including the breach source, date, and what was exposed. You can query by domain, email, username, IP address, or keyword.
Breachsense uses a standard REST API that returns JSON. You can push alerts to your SIEM or SOAR to trigger automated workflows. Common integrations include automated password resets when credentials leak and session token revocation. Most teams connect through webhooks or scheduled polling. The API documentation covers authentication and the endpoint reference. For step-by-step integration patterns, see API workflows and use cases.
Everything runs through the REST API or the Claude Code plugin. The API powers continuous monitoring, SIEM integration, and automated remediation. The Claude Code plugin lets you query the same backend in plain English from your terminal for ad-hoc investigations. MSSPs typically use the API to monitor hundreds of client domains at scale. There is no separate web dashboard to babysit.
Add your vendor domains to your monitoring list. When a vendor gets hit by ransomware or appears in a breach, the API alerts you. You can also run full-text searches on leaked file dumps for your company name to find your data in vendor breaches. This catches supply chain exposure that you wouldn’t find through credential monitoring alone.
The API uses API key authentication. You include your key in the request header. All requests go over HTTPS. You can generate and rotate keys from your dashboard. Rate limits depend on your plan. The API returns standard HTTP status codes so you can handle errors programmatically.
Yes. Pen testers and red teams use the API to find plaintext passwords linked to target domains. Instead of cracking password hashes, you can query leaked credentials directly. The API also surfaces session tokens from infostealer logs that may still be valid. See our penetration testing tools page for more on how security assessors use Breachsense.

Essential Dark Web Monitoring Resources

Dark Web Monitoring

How to monitor criminal marketplaces and forums for your exposed data. Fundamentals to know before implementing API automation.

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Compromised Credential Monitoring

Automate detection of leaked employee and customer credentials. Learn how to reset passwords before attackers exploit them through API workflows.

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Data Breach Monitoring

Monitor for third-party breaches affecting your organization as they’re indexed. Integrate breach alerts into your incident response automation.

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Cyber Threat Intelligence Software

Feed dark web data into your threat intelligence workflows. Aggregate and prioritize alerts from leaked credentials and breach files.

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Third-Party Cyber Risk Management

Monitor vendor breaches through automated dark web surveillance. Detect supply chain risks before they impact your organization.

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External Attack Surface Management

Automate discovery of exposed assets and leaked credentials across your attack surface. Integrate findings into vulnerability management workflows.

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Check Your Exposure

Free scanner to check if your organization’s credentials are already on the dark web. See what API automation can detect for you.

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Integrations and Automation

Connect Breachsense to your SIEM, SOAR, or ticketing system. Overview of webhook and API integration options.

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Claude Code Plugin

Query Breachsense from inside Claude Code in plain English. All 10 endpoints loaded as a skill, no curl required.

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Dark Web Monitoring for MSPs

Multi-tenant dark web monitoring and API integration for managed service providers. Scale monitoring across hundreds of clients.

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Automate Dark Web Monitoring With Our API

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