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YepAPI
28 endpoints

SEO API

Affordable SEO API for keyword research, domain analytics, backlinks, on-page audits, content analysis, and more. Pay per call from $0.01. No monthly minimums.

Keywords

$0.15

Keyword research API with search volume, CPC, difficulty, competition, and 12-month trends. Up to 100 keywords per request from $0.15/call.

POST /v1/seo/keywords

Keyword Ideas

$0.03

Generate hundreds of keyword ideas from any seed keyword with volume, CPC, and difficulty scores. Content planning and topic expansion from $0.03/call.

POST /v1/seo/keywords/ideas

Related Keywords

$0.03

Discover semantically related keywords and variations with volume, CPC, and difficulty. Build topical authority from $0.03/call.

POST /v1/seo/keywords/related

Domain Overview

$0.01

Domain authority, organic traffic estimates, backlink counts, and top-ranking keywords in a single API call. Competitor intelligence from $0.01/call.

POST /v1/seo/domain/overview

Domain Keywords

$0.04

Get every keyword a domain ranks for with positions, volume, traffic, and intent. Reverse-engineer competitor SEO strategies from $0.04/call.

POST /v1/seo/domain/keywords

Backlinks

$0.05

Full backlink profile for any domain — referring domains, anchor text, follow/nofollow, and authority scores. Link building research from $0.05/call.

POST /v1/seo/domain/backlinks

Backlinks List

$0.05

Every backlink pointing to any URL or domain with anchor text, authority scores, and follow/nofollow status. Bulk link data from $0.05/call.

POST /v1/seo/backlinks/list

Backlinks Summary

$0.03

Backlink profile summary — total links, referring domains, dofollow ratio, and authority distribution in one call. Quick link audits from $0.03/call.

POST /v1/seo/backlinks/summary

Anchors

$0.03

Anchor text distribution analysis for any backlink profile. Detect over-optimization and plan natural link building from $0.03/call.

POST /v1/seo/backlinks/anchors

Referring Domains

$0.03

All referring domains linking to any target with authority scores, link counts, and first-seen dates. Link prospecting from $0.03/call.

POST /v1/seo/backlinks/referring-domains

Domain Intersection

$0.05

Find domains that link to competitors but not to you. Uncover link building opportunities your rivals already have from $0.05/call.

POST /v1/seo/backlinks/domain-intersection

Page Intersection

$0.05

Find specific pages that link to competitor URLs but not yours. Page-level link gap analysis for targeted outreach from $0.05/call.

POST /v1/seo/backlinks/page-intersection

On-Page Instant

$0.03

Instant on-page SEO audit for any URL — meta tags, headings, schema, images, internal links, and Core Web Vitals. From $0.03/call.

POST /v1/seo/onpage/instant

Content Parsing

$0.03

Extract and analyze page content — word count, readability, keyword density, headings, and plain text. Content auditing from $0.03/call.

POST /v1/seo/onpage/content

Lighthouse

$0.05

Full Google Lighthouse audit via API — performance, accessibility, best practices, and SEO scores with actionable diagnostics. From $0.05/call.

POST /v1/seo/onpage/lighthouse

Trends

$0.02

Google Trends data API — interest over time, regional breakdown, and related queries for any keyword. Trend analysis from $0.02/call.

POST /v1/seo/trends

Technologies

$0.03

Detect every technology on any website — CMS, analytics, frameworks, CDN, hosting, and more. Technology profiling from $0.03/call.

POST /v1/seo/domain/technologies

Whois

$0.02

Whois lookup API — registrar, creation date, expiry, nameservers, and registrant info for any domain. Domain research from $0.02/call.

POST /v1/seo/domain/whois

Content Search

$0.03

Search and analyze web content for any keyword — social shares, backlinks, word count, and content type. Content research from $0.03/call.

POST /v1/seo/content/search

Content Summary

$0.02

Aggregate content metrics for any topic — average word count, social engagement, backlink counts, and publication frequency. From $0.02/call.

POST /v1/seo/content/summary

Sentiment

$0.03

Sentiment analysis of web content around any keyword — positive, negative, and neutral breakdowns with confidence scores. From $0.03/call.

POST /v1/seo/content/sentiment

Business Info

$0.03

Structured business data API — name, address, phone, hours, ratings, and categories. Local SEO and lead enrichment from $0.03/call.

POST /v1/seo/business/info

ChatGPT Scraper

$0.05

Scrape ChatGPT search results — AI-generated answers, cited sources, and follow-up questions. Track AI SEO visibility from $0.05/call.

POST /v1/seo/ai/chatgpt

Gemini Scraper

$0.05

Scrape Google Gemini search results — AI answers, cited URLs, and related topics. Monitor LLM search engine optimization from $0.05/call.

POST /v1/seo/ai/gemini

SERP Competitors

$0.04

Find which domains compete for your target keywords in Google SERPs. Identify SERP competitors automatically from $0.04/call.

POST /v1/seo/competitors/serp

Domain Competitors

$0.04

Discover SEO competitors for any domain with overlap scores, shared keywords, and traffic comparisons. Competitive analysis from $0.04/call.

POST /v1/seo/competitors/domain

Keyword Gap

$0.04

Keyword gap analysis between two domains — find keywords your competitor ranks for that you don't. Close content gaps from $0.04/call.

POST /v1/seo/competitors/keywords

SERP Overlap

$0.04

Compare specific pages to find shared SERP keywords. Detect content cannibalization and page-level competition from $0.04/call.

POST /v1/seo/competitors/pages