Have I Been Pwned
Have I Been Pwned (HIBP) is a free service operated by Troy Hunt that lets individuals and organizations check whether their email addresses, phone numbers, passwords, or domains have appeared in known data breaches, pastes, or stealer logs. The service aggregates billions of compromised records and exposes both free and paid endpoints, including the k-anonymity Pwned Passwords API. The v3 REST API at haveibeenpwned.com requires an hibp-api-key header for breach, paste, domain, and stealer log endpoints and is offered across Core, Pro, and High RPM subscription tiers.
Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.
API Evangelist profiles Have I Been Pwned the way a machine reads it — 112 machine-readable artifacts across 3 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Have I Been Pwned scores 51.3/100 (developing), with a separate agent-readiness read of 31/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-08 · rubric v0.20.0
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How we profile Have I Been Pwned
Each block below is one kind of artifact we hold for Have I Been Pwned. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 22
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
Have I Been Pwned API v3
REST API for searching breached accounts, pastes, breach metadata, domain breach data, and stealer log entries. Authentication requires an hibp-api-key header (32-character key)...
Pwned Passwords API
Free, unauthenticated, k-anonymity-based API to check whether a password hash appears in the 800+ million record Pwned Passwords dataset. Clients submit the first five character...
Have I Been Pwned Breach API
The Breach API from Have I Been Pwned — 1 operation(s) for breach.
Have I Been Pwned Breachedaccount API
The Breachedaccount API from Have I Been Pwned — 2 operation(s) for breachedaccount.
Have I Been Pwned Breacheddomain API
The Breacheddomain API from Have I Been Pwned — 1 operation(s) for breacheddomain.
Have I Been Pwned Breaches API
The Breaches API from Have I Been Pwned — 1 operation(s) for breaches.
Have I Been Pwned Dataclasses API
The Dataclasses API from Have I Been Pwned — 1 operation(s) for dataclasses.
Have I Been Pwned Domainverification API
The Domainverification API from Have I Been Pwned — 3 operation(s) for domainverification.
Have I Been Pwned Latestbreach API
The Latestbreach API from Have I Been Pwned — 1 operation(s) for latestbreach.
Have I Been Pwned Pasteaccount API
The Pasteaccount API from Have I Been Pwned — 1 operation(s) for pasteaccount.
Have I Been Pwned Range API
The Range API from Have I Been Pwned — 1 operation(s) for range.
Have I Been Pwned Stealerlogsbyemail API
The Stealerlogsbyemail API from Have I Been Pwned — 1 operation(s) for stealerlogsbyemail.
Have I Been Pwned Stealerlogsbyemaildomain API
The Stealerlogsbyemaildomain API from Have I Been Pwned — 1 operation(s) for stealerlogsbyemaildomain.
Have I Been Pwned Stealerlogsbywebsitedomain API
The Stealerlogsbywebsitedomain API from Have I Been Pwned — 1 operation(s) for stealerlogsbywebsitedomain.
Have I Been Pwned Subscribeddomains API
The Subscribeddomains API from Have I Been Pwned — 1 operation(s) for subscribeddomains.
Have I Been Pwned Subscription API
The Subscription API from Have I Been Pwned — 1 operation(s) for subscription.
Have I Been Pwned Breached Accounts API
Lookup breaches affecting an email address.
Have I Been Pwned Data Classes API
Enumerate classes of data exposed across breaches.
Have I Been Pwned Domain Search API
Verify and search domains you control.
Have I Been Pwned Pastes API
Lookup pastes referencing an email address.
Have I Been Pwned Range Search API
K-anonymity range search for password hashes.
Have I Been Pwned Stealer Logs API
Search infostealer malware corpora by email or domain.
Scroll within the panel for all 22 ·
Postman Collections 8
A runnable collection turns the contract into something a developer can execute in seconds. We profile them because the fastest way to trust an API is to make a real call against it.
Ready-to-run Postman collections for exercising this provider's APIs.
Scroll within the panel for all 8 ·
Open Collections 24
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
API Collection
OPEN COLLECTIONHave I Been Pwned API v3 Breach API
OPEN COLLECTIONHave I Been Pwned API v3 Breached Accounts API
OPEN COLLECTIONHave I Been Pwned API v3 Breach Breachedaccount API
OPEN COLLECTIONHave I Been Pwned API v3 Breach Breacheddomain API
OPEN COLLECTIONHave I Been Pwned API v3 Breach Breaches API
OPEN COLLECTIONHave I Been Pwned API v3 Breached Accounts Data Classes API
OPEN COLLECTIONHave I Been Pwned API v3 Breach Dataclasses API
OPEN COLLECTIONHave I Been Pwned API v3 Breached Accounts Domain Search API
OPEN COLLECTIONHave I Been Pwned API v3 Breach Domainverification API
OPEN COLLECTIONHave I Been Pwned API v3 Breach Latestbreach API
OPEN COLLECTIONHave I Been Pwned API v3 Breach Pasteaccount API
OPEN COLLECTIONHave I Been Pwned API v3 Breached Accounts Pastes API
OPEN COLLECTIONHave I Been Pwned API v3 Breach Range API
OPEN COLLECTIONHave I Been Pwned API v3 Breached Accounts Range Search API
OPEN COLLECTIONHave I Been Pwned API v3 Breached Accounts Stealer Logs API
OPEN COLLECTIONHave I Been Pwned API v3 Breach Stealerlogsbyemail API
OPEN COLLECTIONHave I Been Pwned API v3 Breach Stealerlogsbyemaildomain API
OPEN COLLECTIONHave I Been Pwned API v3 Breach Subscribeddomains API
OPEN COLLECTIONHave I Been Pwned API v3 Breach Subscription API
OPEN COLLECTIONHave I Been Pwned API v3
OPEN COLLECTIONHave I Been Pwned API v3
OPEN COLLECTIONPwned Passwords API
OPEN COLLECTIONScroll within the panel for all 24 ·
Pricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Have I Been Pwned Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
Have I Been Pwned Finops
FINOPSFeatures 8
The notable capabilities this provider advertises, captured as structured features so they can be searched and compared instead of read one landing page at a time.
Notable capabilities this provider offers.
Email Breach Search
Lookup all breaches containing an email address.
K-Anonymity Email Search
Privacy-preserving breach lookup by SHA-1 prefix.
Paste Search
Discover paste-site dumps referencing an email.
Stealer Log Lookup
Surface infostealer captures by email, website domain, or email domain.
Domain Monitoring
Subscribe to monitor owned domains via DNS or email verification.
Subscribed Domains Inventory
Inspect monitored domains and pending renewals.
Pwned Passwords (Free)
K-anonymity password compromise lookups with optional response padding.
Subscription Tier Introspection
Inspect the calling key's tier, RPM, and feature flags.
Scroll within the panel for all 8 ·
Semantic Vocabularies 1
JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.
JSON-LD contexts and semantic vocabularies used across these APIs.
Have I Been Pwned Context
JSON-LDSpectral Rules 2
Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.
Have I Been Pwned API Rules
SPECTRALHave I Been Pwned API Rules
SPECTRALJSON Schema 6
Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.
Standalone JSON Schema definitions for this provider's data models.
Breach
JSON SCHEMABreachedAccountRangeEntry
JSON SCHEMAPaste
JSON SCHEMASubscribedDomain
JSON SCHEMASubscriptionStatus
JSON SCHEMAPwnedPasswordsRangeResult
JSON SCHEMAJSON Structure 3
JSON Structure captures the data shapes in a form built for tooling — a complement to JSON Schema that keeps the model machine-legible.
JSON Structure definitions describing this provider's data shapes.
Hibp Breach Structure
JSON STRUCTUREHibp Paste Structure
JSON STRUCTUREHibp Subscription Status Structure
JSON STRUCTUREExamples 15
Real request and response payloads are what turn a spec from abstract into obvious — and they're one of the twelve things an agent needs to call an API correctly on the first try.
Example request and response payloads for these APIs.
Hibp List Breaches Example
EXAMPLEScroll within the panel for all 15 ·
Security Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Use Cases 5
What developers actually build with this provider — captured so the catalogue answers 'what is this for', not just 'what does this expose'.
What developers build with this provider.
Account Takeover Prevention
Block sign-ups using credentials known to be in public breaches.
Incident Response Triage
Quickly enumerate breaches and pastes touching an affected user.
Domain Risk Monitoring
Continuously detect when a domain's users appear in new breaches.
Password Strength Enforcement
Reject candidate passwords already present in the Pwned Passwords corpus.
Stealer Log Notification
Detect infostealer-captured credentials before adversaries weaponize them.
Integrations 5
Pre-built integrations with other platforms tell you where this provider already fits in a stack.
Pre-built integrations with other platforms and tools.
1Password Watchtower
1Password leverages Pwned Passwords to flag compromised credentials.
Mozilla Firefox Monitor
Firefox's breach-notification feature is powered by HIBP.
Okta / Auth0
Identity providers use Pwned Passwords to enforce password policies.
Cloudflare
Cloudflare hosts and accelerates the Pwned Passwords k-anonymity API.
Microsoft Entra (Azure AD)
Banned-password lists can incorporate Pwned Passwords data.
Solutions 6
Packaged solutions the provider offers on top of the raw API surface.
Packaged solutions this provider offers.
Pwned 1
Entry tier ($3.95/mo) for hobbyists and small projects.
Pwned 2
Mid-volume tier with stealer-log access.
Pwned 3
High-volume tier for security vendors and MSSPs.
Pwned 4
Enterprise tier with auto subdomain verification.
Pwned 5
Top tier ($995/mo) for large identity-protection platforms.
Pwned Passwords (Free)
Always-free k-anonymity password lookup at api.pwnedpasswords.com.
Resources
Every other property we hold for Have I Been Pwned — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 2
Portal, sign-up, and the first successful call
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 3
Pagination, idempotency, versioning, errors, and events
Build 3
SDKs, sample code, and the tooling you integrate with
Access & Security 3
Authentication, authorization, and security posture
Operate 4
Status, limits, changes, and where to get help
Commercial 4
Pricing, plans, and the legal terms of use
Company 4
The organization behind the API
Other 2
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/have-i-been-pwned · machine-readable index on apis.io
This is an independent, third-party profile of Have I Been Pwned, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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