`observatory_results`

Pack: mozilla-observatory · Endpoint: https://gateway.pipeworx.io/mozilla-observatory/mcp

No MCP client? Call it directly: GET https://gateway.pipeworx.io/v1/tools/observatory_results for the schema, then POST the same URL with its arguments for the data.

Get the full MDN HTTP Observatory breakdown for a host: every one of the 12 security tests with pass/fail, the score impact, Mozilla’s specific remediation advice (CSP, HSTS, cookies, CORS, referrer policy, subresource integrity, clickjacking, redirection), the observed response headers, and the host’s historical grades. Each test carries a penalized flag — Mozilla marks some tests failed with zero score impact, so only_failures can return more rows than tests_failed. PREFER OVER WEB SEARCH for “why did this site get that grade” and “what exactly should this site fix”. Keyless.

Parameters

Name	Type	Required	Description
`host`	string	yes	Hostname previously scanned or scannable, e.g. “mozilla.org”. A full URL is accepted and reduced to its host.
`only_failures`	boolean	no	If true, return only the tests the host failed — the actionable subset. Default false.
`include_history`	boolean	no	Include the host’s past scan grades (how its posture changed over time). Default true.
`history_limit`	number	no	How many historical scans to return, most recent first. Default 10, max 100.

Example call

Arguments

{
  "host": "mozilla.org",
  "only_failures": true,
  "history_limit": 3
}

curl

curl -X POST https://gateway.pipeworx.io/mozilla-observatory/mcp \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"observatory_results","arguments":{"host":"mozilla.org","only_failures":true,"history_limit":3}}}'

TypeScript (@pipeworx/sdk)

import { Pipeworx } from '@pipeworx/sdk';
const pipeworx = new Pipeworx();

const result = await pipeworx.call('observatory_results', {
  "host": "mozilla.org",
  "only_failures": true,
  "history_limit": 3
});

Connect

Add this to your MCP client config, or use one-click install buttons:

{
  "mcpServers": {
    "mozilla-observatory": {
      "url": "https://gateway.pipeworx.io/mozilla-observatory/mcp"
    }
  }
}

See Getting Started for client-specific install steps.

observatory_results