Rankparse

This pay-as-you-go SEO data API provides structured backlink intelligence for developers, solo founders, agencies, and AI agents that need link data without committing to a monthly SEO tool subscription. Pull backlink and domain data through an API when you need it, use credits per lookup, and stop paying when you do not need further data.

The platform is designed around competitor research, backlink gap analysis, and outreach prospecting. You can compare the domains linking to different websites, inspect referring domains, analyze anchor text, explore top pages, and compare keyword overlap. REST access and MCP support also make the data suitable for automated workflows and AI agents.

Key Features

Backlink Data

Retrieve structured backlink information for any domain.

• Backlink data delivered as JSON
• Domain-level link intelligence
• Structured responses for programmatic use
• Paginated API responses
• Explicit credit costs included in responses

This makes backlink research easier to integrate into applications, internal tools, scripts, and automated SEO workflows.

Referring Domains

Identify the unique domains linking to a target website.

• Retrieve referring domains
• Find unique linking websites
• Research competitor link profiles
• Identify potential outreach prospects
• Support backlink gap analysis

Referring-domain data can help uncover websites that already link within a particular market or to competing products.

Anchor Text Analysis

See how websites describe a target through their backlinks.

• Retrieve anchor text
• Review how sites reference a domain
• Identify patterns across backlinks
• Find potential link-building opportunities

Anchor text provides additional context around why a site is being linked to and how it is being positioned by referring websites.

Domain Authority Data

Pull authority-style scores alongside backlink information.

• Retrieve domain authority-style metrics
• Combine authority data with link research
• Evaluate potential referring domains
• Support prospect prioritization

This gives developers and SEO teams another data point when assessing backlink opportunities.

Site Explorer

Explore the pages that attract attention within a domain.

• Look up top pages
• Review pages by traffic
• Review pages by links
• Identify pages attracting backlinks
• Research competitor content

Site-level exploration helps connect backlink research with the pages actually receiving traffic and links.

Keyword Overlap

Compare keyword visibility between domains.

• Compare shared keywords
• Identify keyword overlap with competitors
• Find areas of search competition
• Support competitor research

Keyword overlap can add search visibility context to backlink analysis and help identify broader competitive opportunities.

Built For Programmatic SEO Research

The API is designed for code-first workflows rather than requiring users to work exclusively inside a traditional SEO dashboard.

It fits:

• Developers building SEO tools
• Solo founders
• SEO agencies
• Outreach teams
• Internal marketing tools
• AI agents
• Automated competitor research workflows
• Link prospecting systems

Common Use Cases

Backlink competitor research: Pull link data for competing domains and compare their backlink profiles.

Backlink gap analysis: Find domains that link to one website but not another to identify potential outreach opportunities.

Link prospecting: Use referring domains and anchor text to discover and evaluate potential link prospects.

Competitor site research: Explore top pages by traffic and links to understand where competitors are attracting attention.

SEO data applications: Integrate structured backlink data into your own software, dashboards, scripts, or workflows.

AI-powered SEO research: Give MCP-compatible AI agents direct access to backlink and domain data instead of manually copying results between tools.

REST API and MCP

The API provides programmatic access through REST calls with structured JSON responses and pagination. Credit costs are explicitly returned with requests, making usage easier to track.

An MCP server is also available for AI-assisted workflows with compatible clients such as:

• Claude
• ChatGPT
• Cursor
• Other MCP clients

This allows an AI agent to query backlink intelligence directly as part of a larger research workflow.

Pricing

The service uses a pay-as-you-go credit model rather than a monthly subscription.

• Requests start at $0.01 per call
• No subscription
• No seat pricing
• No monthly minimum
• Credits never expire
• Free account includes starter credits

You only consume credits when making lookups, making the model suitable for occasional research as well as automated usage.

Why It Matters

Backlink intelligence is often bundled into larger SEO platforms with recurring subscriptions, even when you only need a specific dataset occasionally. That can make simple competitor research or a small outreach project unnecessarily expensive.

This API takes a different approach by making backlink data available as structured, on-demand information. You can retrieve backlinks, referring domains, anchor text, authority-style scores, top pages, and keyword overlap whenever your workflow requires them.

The code-first design also means the data does not have to stay inside another dashboard. REST access can feed your own applications, while MCP support lets AI agents query the source directly.

Pull SEO Data When You Need It

Get structured backlink intelligence without a monthly SEO tool bill. Use pay-as-you-go credits to research backlinks, referring domains, anchor text, competitors, top pages, and keyword overlap, then connect the data to your applications, outreach workflows, or MCP-compatible AI agents.