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Most buyers should pick YepAPI.
Choose YepAPI when your application needs a metered API for SEO, scraping, social and e-commerce data, or AI models, with one key and JSON responses. Choose Keywords Everywhere when browser-based research, competitor metrics and keyword data across 15+ sites matter more than a general-purpose API. Its free browser features and annual credit plans suit marketers; YepAPI’s $5 signup credit and no rate limits make it the closer fit for developers building API-driven workflows.
01Side by side
| YepAPI | Keywords Everywhere | |
|---|---|---|
| Pricing model | Pay per call; no monthly fees or minimums | Annual plans with yearly keyword-credit allowances |
| Free tier | $5 signup credit; no card required | Free browser tools; zero search-volume credits |
| API and SDKs | One key; JSON endpoints for multiple data types | API and MCP access for live keyword data |
| Docs and agent tooling | Docs, llms.txt, MCP server and agent skills | MCP server and 200+ prompt templates |
| Integrations | Claude Code, Cursor, Codex and MCP | 20+ integrations, including Google, Bing and AI tools |
| Platforms | Web | Chrome, Firefox and Edge |
| Limits and scaling | No rate limits; failed calls are not charged | Credit allowances vary by annual plan |
| Deployment model | Usage-billed API | Browser extension, API and MCP access |
YepAPI Choose YepAPI if
- Choose YepAPI if your app needs several data types behind one API key.
- Choose YepAPI if you want usage billing without subscriptions or monthly minimums.
- Choose YepAPI if no published rate limits suit your integration.
Keywords Everywhere Choose Keywords Everywhere if
- Choose Keywords Everywhere if you want SEO metrics while browsing.
- Choose Keywords Everywhere if free browser tools meet your research needs.
- Choose Keywords Everywhere if your team needs annual credit pools and seats.
02Pricing at real usage
YepAPI charges by call or other metered usage, with no subscriptions or monthly minimums. The pricing page lists a $5 signup credit, Google SERP calls from $0.01, and no charge for failed calls. A keyword overview call is listed from $0.03; other endpoint and model prices vary. That means spend follows the endpoints and models your application calls, rather than a fixed monthly seat plan.
Keywords Everywhere has a free tier with browser features but 0 keyword search-volume credits. Its paid plans are billed annually: Bronze is $7 per month equivalent for 100,000 credits a year and one seat; Silver is $14 for 400,000 credits and three seats; Gold is $40 for 2 million credits and 10 seats; Platinum is $120 for 8 million credits and 20 seats. Credit use drives how much paid keyword data you can retrieve, while seats and site research limits also rise by plan. Standalone monthly pricing is not published.
03API, SDKs and integration
YepAPI is a hosted API with POST endpoints and JSON responses. The homepage shows calls for keyword overview, Google SERPs, web scraping and media generation. One API key works across SEO, scraping, social and e-commerce data, and its catalog of 285 AI models. The homepage points developers to the docs and an llms.txt file, and lists Claude Code, Cursor, Codex, an MCP server and agent skills. The vendor does not list named language SDKs or a CLI on the homepage, so teams should plan around the documented API rather than assume a client library.
Keywords Everywhere starts as a browser extension for Chrome, Firefox and Edge, with free features and paid keyword metrics. It also offers API and MCP access to live keyword data for AI tools; its MCP server connects to ChatGPT, Claude, Cursor and VS Code. The homepage lists 20+ integrations, including Google services, Bing, YouTube, Amazon, eBay, Etsy, ChatGPT, Claude, Gemini and DeepSeek. It does not list language SDKs or a CLI. For app integration, confirm the API's available endpoints and operating limits with the vendor before sizing a production workflow.
04Open source, self-hosting and lock-in
Neither vendor publishes an open-source license or a self-hosting option on its homepage. Treat both as vendor-operated services, not components you can deploy under your own infrastructure or modify under a published open-source license. Ask each vendor about hosting, data handling and contractual terms before sending sensitive inputs.
YepAPI's shared key and consistent JSON format can reduce the number of integrations in an application, but also tie calls to its endpoint catalog and billing. Keywords Everywhere connects browser research and keyword credits to its extension, API and MCP access. The vendors do not publish a data-export or migration path on their homepages. Keep raw inputs, outputs and any derived metrics in your own storage where permitted, and isolate vendor calls behind an internal interface. That makes it easier to replace endpoints or providers if pricing, coverage or product requirements change.
Questions people ask
What is Keywords Everywhere?
Keywords Everywhere is a browser extension for SEO, PPC, social, e-commerce and competitor research. Its free features include prompt templates, traffic and backlink data, and social metrics. Paid credits provide search volume, CPC and competition metrics across 15+ sites; the vendor also offers API and MCP access to live keyword data.
Is YepAPI or Keywords Everywhere better for an app?
YepAPI is the closer fit when an app needs a general-purpose API for SEO, scraping, social and e-commerce data, or AI models. Keywords Everywhere offers API and MCP access to live keyword data, but its primary product is a browser extension. Confirm endpoint coverage and operating limits before depending on either service in production.
Does Keywords Everywhere have a free plan?
Yes. Its free plan includes browser features, prompt templates and social metrics, but 0 keyword search-volume credits. Paid keyword metrics require a plan. The listed paid tiers are billed annually, starting with Bronze at $7 per month equivalent for 100,000 credits per year.
Does YepAPI charge a subscription?
No subscription or monthly minimum is listed. YepAPI bills by API call or other metered usage, and the pricing page lists a $5 signup credit. Google SERP calls start at $0.01, while endpoint and model prices vary. Failed calls are not charged, according to the product facts.