XposedOrNot Breach Intelligence

XposedOrNot API

🎉 Your free API for real-time data breach monitoring and analytics.

XposedOrNot API Playground · XposedOrNot.com

What is XposedOrNot API?

Data breaches happen constantly, and most people only find out long after their email and passwords are already circulating. I built XposedOrNot so you don't have to wonder. Check an email or domain and know right away whether it's turned up in a known breach.

This repo is the API that powers it all: the breach lookups, the analytics, and the alerts. It's free to use, and it's open-source, so you can read exactly how every check works rather than taking my word for it.

Give it a try below, and if you find it useful, I'd love for you to build something with it.

Devanand Premkumar, creator of XposedOrNot

Quick Example

Check if an email has been exposed in data breaches:

curl https://api.xposedornot.com/v1/check-email/test@example.com

Response:

{

"breaches": [["Adobe", "LinkedIn"]], "email": "test@example.com", "status": "success" }

Get detailed breach analytics:

curl "https://api.xposedornot.com/v1/breach-analytics?email=test@example.com"

Rate Limits & API Access

• No API key required for basic endpoints (/v1/check-email, /v1/breach-analytics, /v1/breaches)
• API key required for domain breach monitoring — see Domain endpoints & API keys for how to get and use one

Rate limits are applied per IP, per endpoint:

When a limit is exceeded the API returns 429 Too Many Requests with a Retry-After header (seconds) and a JSON body carrying retry_after and reset_time, so clients can back off precisely. On /v1/check-email and /v1/breach-analytics the body also carries a human-readable message and an upgrade block (plan, url, note) pointing at xonAPI+, and the response sets a Link: <...>; rel="help" header to the plans page.

Commercial use & higher rate limits

The free API above is for personal and low-volume use, and it stays free. If you're building a product on breach data or need more throughput, xonAPI+ offers paid plans from $9/month with rate limits up to 25,000 requests/minute, API-key access, and commercial support. It's the same breach data, and it's what keeps the free tier free.

For full documentation, see the API docs and the API playground.

API Endpoints

The full, always-current spec lives at /docs (Swagger) and /openapi.json. The endpoints you'll reach for most:

Breach lookups

Stats & feeds

Domain endpoints & API keys

Breach data for a domain is only available once you've verified ownership of that domain, and calls are authenticated with an API key tied to your account.

Getting an API key — keys are issued and managed from the web console, not via a public endpoint:

1. Sign in at xposedornot.com.
2. Open your CxO Dashboard and verify the domain(s) you want to monitor.
3. Go to API Key Management (linked from the dashboard). Your key is shown there; use Reset API Key to rotate it.

Using the key — pass it in the x-api-key header. The domain-breaches endpoint takes no body; it returns breaches across *all* the domains you've verified:

curl -L -X POST \

-H "x-api-key: " \ -H "Content-Length: 0" \ https://api.xposedornot.com/v1/domain-breaches/

An invalid key (or one with no verified domains) returns 401 Invalid or missing API key; omitting the x-api-key header entirely returns 422. See the API docs for the full domain verification and alert-subscription flows.

Use it from your AI tools (MCP)

XposedOrNot ships a built-in Model Context Protocol server, so AI assistants can check breaches directly. Point your MCP client at https://api.xposedornot.com/mcp (Streamable HTTP, JSON-RPC 2.0 over POST). No API key or authentication is needed; all tools are read-only and never return passwords.

Tools exposed:

• `check_email_breaches`: check if an email appears in any known breach
• `get_breach_analytics`: detailed breach history, risk score and paste exposure for an email
• `list_breaches`: browse the breach catalog, filter by domain or breach ID
• `domain_breach_summary`: aggregate breach counts for a domain
• `get_breach_metrics`: system-wide breach statistics
• `get_recent_breaches`: most recently added breaches, newest first

Quick connect:

claude mcp add --transport http xposedornot https://api.xposedornot.com/mcp

For Cline, Cursor, Gemini CLI and other clients, see llms-install.md. A machine-readable server card is at https://api.xposedornot.com/.well-known/mcp/server-card.json.

A quick tools/list call:

curl -X POST https://api.xposedornot.com/mcp \

-H "Content-Type: application/json" \ -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

Why use XposedOrNot API?

XposedOrNot was the first open-source tool to monitor and alert on data breaches, and this API gives you direct access to everything it has collected and keeps current. With it you can:

• Check whether an email has appeared in a known data breach, with stats on where and when
• See if an email shows up in public pastes
• Run a single combined search across both breaches and pastes
• Check whether a password has been exposed without ever revealing your identity

Prefer to just look something up without writing code? You can do all of this on the website too: https://xposedornot.com.

Security

This project is fully open-source and uses automated security tooling (Black, Pylint, CodeQL, OpenSSF Scorecard). For security details, see SECURITY.md.

Please do not report security vulnerabilities through public GitHub issues. Instead, refer to our Responsible Disclosure Guidelines for reporting these issues in a secure manner.

Prerequisites

• Docker (recommended): Docker 20.10+ and Docker Compose V2
• Local install: Python 3.11+, Google Cloud SDK

Quick Start for Local Development

Using Docker Compose (Recommended)

1. Clone the Repository:

shell git clone https://github.com/XposedOrNot/XposedOrNot-API

1. Update the necessary environment variables in the docker-compose.yml file if needed, then run:

shell docker compose up

This command will build API and Datastore Docker images. Note that the project source directory is mapped in the Docker container, so any changes in the source code won't require rebuilding the Docker image.

Local Installation

1. Clone the Repository:

shell git clone https://github.com/XposedOrNot/XposedOrNot-API

1. Install Required Packages

shell sudo apt-get install -y python3-pip build-essential libffi-dev python3-dev

Then install the gcloud CLI — it's not in the stock Debian/Ubuntu repositories and is needed for step 4 (Datastore authentication or the local emulator).

1. Install Python Libraries

shell pip3 install -r requirements.txt

1. Setup Google Cloud Datastore

Before running XposedOrNot-API, choose one of the following options:

• Run local Google DataStore emulator and debug using the local emulator rather than directly connect to Google DataStore.

`shell

For posix platforms, e.g. linux, mac:

gcloud beta emulators datastore start `

• Authenticate to Google DataStore and directly debug using Google DataStore.

1. Run the application

shell python3 main.py

Configuration

Configuration is read from environment variables. For Docker Compose these are already set in docker-compose.yml; for a local install, copy .env.example to .env and fill in the values (or export them in your shell).

Required (the