# RankParse > Backlink API from $0.003/request. Credits never expire. No subscription required. RankParse is a pay-as-you-go SEO data API powered by pre-processed Common Crawl data, served on Cloudflare's global edge network. It exposes 22 endpoints covering backlinks, domain authority, anchor text, tech stack, page metadata, and more — all via plain REST with an X-API-Key header. Positioning: The cheapest transparent alternative to Ahrefs API ($129/mo min, 10-row cap) and Semrush API ($499.95/mo Business plan required). RankParse has no subscription, no row caps, and credits that never expire. Data source: Quarterly Common Crawl snapshots. 3B+ pages indexed. Full link graph computed from scratch each run. ## Getting Started - [Quickstart](https://rankparse.com/docs/getting-started): Authenticate, make your first request, understand credits - [Authentication](https://rankparse.com/docs/authentication): X-API-Key header, key management - [Credits](https://rankparse.com/docs/credits): How credits work, pack sizes, never-expire policy - [Rate limiting](https://rankparse.com/docs/rate-limiting): 60 req/min per key, sliding window - [Errors](https://rankparse.com/docs/errors): Error codes and response shapes - [MCP server](https://rankparse.com/docs/mcp): Model Context Protocol server for Claude Code, Cursor, and AI agents - [Changelog](https://rankparse.com/changelog): Version history ## API Endpoints All endpoints: GET with query params, `X-API-Key` header, JSON responses. - [Backlinks](https://rankparse.com/docs/endpoints/backlinks): Inbound links for any domain. 2 credits. - [Referring Domains](https://rankparse.com/docs/endpoints/referring-domains): Unique linking domains. 2 credits. - [Anchor Text](https://rankparse.com/docs/endpoints/anchor-text): Anchor text distribution. 2 credits. - [Domain Authority](https://rankparse.com/docs/endpoints/domain-authority): 0–100 authority score from the web link graph. 1 credit. - [Top Pages](https://rankparse.com/docs/endpoints/top-pages): Highest-linked URLs for a domain. 2 credits. - [Outbound Links](https://rankparse.com/docs/endpoints/outbound-links): External links from a domain. 2 credits. - [Site Explorer](https://rankparse.com/docs/endpoints/site-explorer): Full domain overview. 10 credits. - [Batch](https://rankparse.com/docs/endpoints/batch): Score up to 50 domains in one request. 2 credits/domain. - [Tech Stack](https://rankparse.com/docs/endpoints/tech-stack): Detected technologies (CMS, CDN, analytics, etc.). 2 credits. - [Page Meta](https://rankparse.com/docs/endpoints/page-meta): Title, H1, meta description, HTTP status. 2 credits. - [URL Index](https://rankparse.com/docs/endpoints/url-index): Indexed URLs for a domain. 2 credits. - [Domain Rank](https://rankparse.com/docs/endpoints/domain-rank): Relative rank by inbound link count. 2 credits. - [Domain Overlap](https://rankparse.com/docs/endpoints/domain-overlap): Domains linking to multiple targets. 5 credits. - [Link Intersect](https://rankparse.com/docs/endpoints/link-intersect): Shared linkers between two domains. 5 credits. - [Similar Domains](https://rankparse.com/docs/endpoints/similar-domains): Related domain discovery. 5 credits. - [Crawl History](https://rankparse.com/docs/endpoints/crawl-history): Historical crawl metadata. 2 credits. - [Status Codes](https://rankparse.com/docs/endpoints/status-codes): HTTP status code distribution. 2 credits. - [Content Types](https://rankparse.com/docs/endpoints/content-types): Content type distribution. 2 credits. - [Language](https://rankparse.com/docs/endpoints/language): Language distribution. 2 credits. ## Pricing - Free tier: 100 credits on signup. No credit card. - Starter: $9 / 1,000 credits ($0.009/credit) - Growth: $49 / 10,000 credits ($0.0049/credit) - Scale: $299 / 100,000 credits ($0.00299/credit) - Credits never expire. No subscription. No monthly minimums. Full details: https://rankparse.com/pricing ## Competitor Comparisons - [vs Ahrefs](https://rankparse.com/vs/ahrefs): No $129/mo subscription. No 10-row cap. No 3-month credit expiry. - [vs Semrush](https://rankparse.com/vs/semrush): No $499.95/mo Business plan required to access the API. - [vs Moz](https://rankparse.com/vs/moz): No seat license. No monthly quota that resets and disappears. - [vs Majestic](https://rankparse.com/vs/majestic): Same link graph depth. More endpoints. Actual free tier. - [vs DataForSEO](https://rankparse.com/vs/dataforseo): No $50 deposit minimum. Bearer token auth (not Basic Auth). Flat pricing. ## Integrations - [Claude Code MCP](https://rankparse.com/integrations/claude-code): MCP server config + 18 pre-built tools - [Node.js / TypeScript](https://rankparse.com/sdk/node): Works with native fetch, Cloudflare Workers, Edge Runtime - [Python](https://rankparse.com/sdk/python): Works with requests, httpx, FastAPI, pandas, LangChain - [Next.js](https://rankparse.com/for/nextjs): Server Components, Route Handlers, ISR patterns - [FastAPI](https://rankparse.com/for/fastapi): Async httpx integration ## Use Cases - [Link building](https://rankparse.com/use-cases/link-building): Prospect scoring, competitor audits, anchor text analysis - [Lead enrichment](https://rankparse.com/use-cases/lead-enrichment): Domain authority + tech stack enrichment for CRM and outbound - [AI SEO agents](https://rankparse.com/use-cases/ai-seo-agents): GEO/AEO monitoring, competitive analysis, LangChain tool use - [Agencies](https://rankparse.com/use-cases/agencies): Multi-client reporting, white-label data, automated audits ## OpenAPI Machine-readable spec: https://rankparse.com/openapi.yaml