Open Page Rank

About Open Page Rank

Open Page Rank is an API service that provides authority scores for domains, built from Common Crawl's open web graph. Each domain receives a score from 0 to 10, along with monthly historical data tracked since 2018, allowing users to see whether a domain's authority is rising, stable, or declining over time. The scoring is spam-filtered, so domains that manufacture authority through link networks are scored near zero rather than inflated.

The API accepts up to 100 domains in a single request and returns each domain's current score, rank, referring domain count, and full monthly history in one response. Access requires signing in with a Keywords Everywhere key to generate an OPR API key. Beyond the REST API, the service offers an MCP server for AI assistants to query domain scores directly.

The service covers over 118 million scored domains and is aimed at developers and users who need to evaluate domain authority at scale, such as when comparing many domains at once rather than checking them individually. The free plan includes 30,000 domain checks per month with no signup required for basic domain checks, and higher limits are available on paid Keywords Everywhere plans.

Key features

• Bulk scoring of up to 100 domains per API call, each with a 0-10 authority score
• Monthly historical score data tracked since 2018
• Spam-filtered scores that detect and downrank manufactured link-network authority
• Covers 118M+ domains, computed from Common Crawl's open web graph
• MCP server for AI assistants to look up domain scores directly

Frequently asked questions