Website monitoring API

    Lemwatch gives you one REST endpoint for uptime, response time, SSL and incident data on any site you monitor, and a POST call that runs a fresh check on demand. Authenticate with a bearer API key, get JSON back, 100 requests an hour by default. Keys are created in Settings → API Keys once you have an account.

    Create a free account and get an API key →API help article

    Using an AI assistant? Try the MCP server instead

    Connect Claude, ChatGPT, or Cursor directly to Lemwatch — 19 tools, 5 live resources, 6 playbooks.

    Read the MCP setup guide →Mint a token

    Authentication

    All API requests require an API key

    Generate an API key from Settings → API Keys in your dashboard. Include it in the Authorization header:

    Authorization: Bearer YOUR_API_KEY
    API keys are hashed and never stored in plain text.

    Base URL

    API base URL

    Rate Limits

    Default: 100 requests/hour per API key. Custom limits can be configured per key. Exceeding the limit returns 429 Too Many Requests.

    Endpoints

    GET
    /public-api

    Get site status and metrics

    site_id
    required
    UUID of the site to query
    include
    optional
    Comma-separated: uptime,performance,security,incidents

    POST
    /public-api

    Trigger a site check

    action
    required
    "run_check"
    site_id
    required
    UUID of the site

    Error Codes

    400
    Bad Request — Missing or invalid parameters
    401
    Unauthorized — Invalid or missing API key
    403
    Forbidden — API key lacks required permissions
    404
    Not Found — Resource does not exist
    429
    Too Many Requests — Rate limit exceeded
    500
    Internal Server Error — Try again later

    Common questions

    Does Lemwatch have an uptime monitoring API?

    Yes. A single GET endpoint returns current status, 24-hour, 7-day and 30-day uptime, response time and health score for any site on your account, and a POST call runs a fresh check immediately. Responses are JSON.

    How do I get an API key?

    Create an account, add a site, then open Settings → API Keys and generate one. Keys are shown once and stored hashed. Send it as Authorization: Bearer YOUR_API_KEY. API access is a paid-plan feature; alert webhooks and the MCP server work on the free plan.

    Can I connect it to Slack, Zapier, n8n or a webhook?

    Yes. Alerts can post to Slack, Discord, Telegram, Microsoft Teams, PagerDuty and any webhook URL without writing code, and the API can be polled from Zapier, Make or n8n on a schedule. See the alert integrations pages for each channel's setup steps.

    Can an AI assistant read my monitoring data?

    Yes — the Lemwatch MCP server connects Claude, ChatGPT and Cursor straight to your sites, incidents, SSL and SEO data without you writing any API code.