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It's a split decision.
Choose YepAPI when your application needs SEO and SERP data, web scraping, social or commerce data, and AI models behind one usage-billed API key. Choose X API when the product needs to read or publish X posts, search X, manage accounts, or consume X streams and events. YepAPI offers $5 in signup credit and lists no rate limits; X API provides Python and TypeScript SDKs but imposes published usage caps and charges by operation.
01Side by side
| YepAPI | X API | |
|---|---|---|
| Pricing model | Prepaid, usage-based calls; no subscriptions | Prepaid usage credits or custom Enterprise contract |
| Free tier | $5 signup credit; no card required | No current free plan; legacy free retired |
| API and SDKs | Shared key and JSON; SDKs not listed | REST v2, OAuth, XDKs for Python and TypeScript |
| Docs and agent tools | llms.txt, MCP server, agent skills | Docs and machine-readable OpenAPI specifications |
| Integrations | Claude Code, Cursor, Codex, MCP | REST requests, webhooks, OAuth; third-party platforms |
| Deployment model | Hosted API | Hosted API over HTTPS |
| Platforms | Web | Any environment that can make HTTPS requests |
| Limits and scaling | No rate limits listed | 3 million monthly post reads; additional request caps |
YepAPI Choose YepAPI if
- Choose YepAPI if one key should cover SEO, scraping and AI models.
- Choose YepAPI if you want a $5 signup credit without a subscription.
- Choose YepAPI if your agent workflow uses its MCP server or agent skills.
X API Choose X API if
- Choose X API if your application needs to publish or manage X posts.
- Choose X API if you need X search, streams, webhooks or account functions.
- Choose X API if Python or TypeScript XDKs fit your integration.
02Pricing at real usage
YepAPI has no monthly subscription or minimum, and its pricing page lists $5 in signup credit with no card required. After that, usage is prepaid and billed per call or other metered unit. The homepage lists Google SERP at $0.01 per call, keyword overview at $0.03, scraping at $0.01, image generation from $0.03 per image, and Kling video from $0.192 per second. Failed calls are not charged.
X API also has no base subscription on Pay-Per-Usage, but charges vary by operation: the pricing page lists $0.005 per post read, $0.010 per user, follower or following read, and $0.015 per post created or direct message sent. The plan includes 3 million post reads per monthly billing cycle. Requests stop when credits reach zero or a spending limit is reached. Enterprise pricing is custom; overage costs are not published.
03API, SDKs and integration
YepAPI presents a hosted API with endpoints for SEO, SERP data, scraping, social and commerce data, and AI models. The homepage shows POST requests and JSON responses, with one API key used across endpoints and models. Its docs include an llms.txt file, and the homepage lists an MCP server and agent skills, plus Claude Code, Cursor and Codex integrations. The vendor does not list official language SDKs in the published facts.
X API exposes REST v2 endpoints over HTTPS, with JSON payloads and OAuth 2.0 or OAuth 1.0a authentication. The vendor lists official XDKs for Python and TypeScript and machine-readable OpenAPI specifications. Its documented integration patterns include REST requests, webhooks and OAuth; Account Activity API webhooks deliver events. X's developer documentation is at developer.x.com and docs.x.com. There is no published centralized directory or total count of integrations.
04Open source, self-hosting and lock-in
Neither YepAPI nor X publishes an open-source license or self-hosting option. Both are hosted APIs, so applications depend on vendor availability, credentials and endpoint behavior rather than running the service in their own infrastructure.
The main lock-in difference is scope. YepAPI provides a shared key and response format across several service categories, but applications still depend on its endpoint definitions and model catalog. X API is specific to X data and account functions, so replacing it means finding another source for X posts, relationships, messages or events. Both return JSON, which gives your application a format it can store independently. The vendors do not publish a general export or migration guarantee. For either integration, persist the records your application needs and keep vendor-specific response handling behind an internal interface.
Questions people ask
Does YepAPI have a free tier?
YepAPI lists $5 in signup credit and says no card is required. It does not offer a subscription-based free plan in the pricing details; calls are charged by usage after the credit is used. Failed calls are not charged.
How is X API pricing different from YepAPI?
Both use prepaid, usage-based billing without a base subscription on their listed pay-per-use offers. YepAPI prices calls and other metered units by endpoint or model. X API charges by operation, including $0.005 per post read, and publishes a 3 million monthly post-read cap.
Which API has SDKs for Python and TypeScript?
X lists official XDKs for Python and TypeScript, along with machine-readable OpenAPI specifications. YepAPI shows HTTP requests, JSON responses, an llms.txt file and agent tooling, but its homepage does not list official language SDKs.
Can I self-host either API?
Neither vendor publishes a self-hosting option. Both are offered as hosted APIs, so an application calling them depends on vendor-managed endpoints. If portability matters, keep API-specific code behind an internal interface and store the data your application needs.