> ## Documentation Index > Fetch the complete documentation index at: https://docs.crakseo.com/llms.txt > Use this file to discover all available pages before exploring further. > ## Agent Instructions > For SEO data and indexing, start with /seo-mcp/overview.md and /seo-mcp/connect.md, then read the focused server reference. > The documentation search MCP at https://docs.crakseo.com/mcp searches documentation only. Product tools use https://crakseo.com/mcp/. > Check tool availability and API credit balance before paid calls. Request owner approval for paid indexing. Never invent prices, indexing guarantees or directory approval. # API credits and pay-as-you-go pricing > How CrakSEO's pay-as-you-go MCP and API pricing works: prepaid API credits, per-call prices, free tools and pay-per-call for agents. CrakSEO's MCP servers and APIs are pay as you go. There is no subscription and no minimum deposit for data calls. You buy a pack of **API credits**, and each paid call deducts its price. ## Packs | Pack | Price | Notes | | - | - | - | | Small | \$5 | One-off purchase | | Medium | \$20 | One-off purchase | | Large | \$100 | One-off purchase | Packs are bought on the **API credits** tab of **Indexing** (`/app/indexing/credits`). When your balance is too low, MCP servers return an `insufficient_credits` error that points there. Credits don't expire. Final pack sizes are set at launch. ## Per-call prices Each tool's price per call is listed on its server page. Prices marked **TBD** are placeholders until launch. | Server | Endpoint | Tools | Billing | | - | - | - | - | | [SEO MCP](https://docs.crakseo.com/mcp-servers/seo.md) | `https://crakseo.com/mcp/seo` | 20 | Pay as you go (API credits) | | [Google SERP API MCP](https://docs.crakseo.com/mcp-servers/serp-api.md) | `https://crakseo.com/mcp/serp-api` | 6 | Pay as you go (API credits) | | [Keyword Research MCP](https://docs.crakseo.com/mcp-servers/keyword-research.md) | `https://crakseo.com/mcp/keyword-research` | 5 | Pay as you go (API credits) | | [Backlink Checker MCP](https://docs.crakseo.com/mcp-servers/backlinks.md) | `https://crakseo.com/mcp/backlinks` | 4 | Pay as you go (API credits) | | [Google Rank Tracker MCP](https://docs.crakseo.com/mcp-servers/rank-tracker.md) | `https://crakseo.com/mcp/rank-tracker` | 5 | Pay as you go (API credits) | | [SEO Site Audit MCP](https://docs.crakseo.com/mcp-servers/site-audit.md) | `https://crakseo.com/mcp/site-audit` | 3 | Pay as you go (API credits) | | [Local SEO MCP](https://docs.crakseo.com/mcp-servers/local-seo.md) | `https://crakseo.com/mcp/local-seo` | 3 | Pay as you go (API credits) | | [AI Search Visibility MCP](https://docs.crakseo.com/mcp-servers/ai-visibility.md) | `https://crakseo.com/mcp/ai-visibility` | 4 | Pay as you go (API credits) | | [URL Indexing MCP](https://docs.crakseo.com/mcp-servers/url-indexing.md) | `https://crakseo.com/mcp/url-indexing` | 5 | Free IndexNow and Bing; paid Google submission | | [Google Search Console MCP](https://docs.crakseo.com/mcp-servers/search-console.md) | `https://crakseo.com/mcp/search-console` | 8 | Free | * **Free:** every tool on the [Search Console MCP](https://docs.crakseo.com/mcp-servers/search-console.md), IndexNow submission and index status checks on the [URL Indexing MCP](https://docs.crakseo.com/mcp-servers/url-indexing.md). * **Paid Google submission** is priced per accepted URL, shown in an exact quote and charged only after the account owner approves it. * Calls that fail with an error are not charged. * Repeated identical data requests may be served from a short-lived cache at the same price. ## Pay per call without an account Once pay-per-call is switched on (it is not live yet), agents can call the REST endpoints without a CrakSEO account by paying for each call with x402 or Stripe's Machine Payments Protocol (MPP): * **x402**: USDC on Base. The agent's wallet signs a payment authorization for the quoted amount. * **MPP**: stablecoins on Tempo, or a card through a shared payment token from an agent wallet such as Link. Card payments are only offered for calls of \$0.50 or more. A call without an API key or payment gets HTTP `402 Payment Required` with the exact price, fixed before the call (about three times the API credits price, at least \$0.01). The payment is only taken after the data comes back. If the call fails, you are not charged, and each payment pays for one call only. The REST hostnames are: | Host | Data | | - | - | | `serp.crakseo.com` | SERP results | | `keywords.crakseo.com` | Keyword data | | `backlinks.crakseo.com` | Backlinks | | `index.crakseo.com` | URL indexing (serves the SEO data catalog until an indexing REST endpoint ships) | Each host serves its tool list at `/` and one tool per path, for example `https://serp.crakseo.com/get_google_serp`. These hostnames go live once their DNS records are in place; until then, use the MCP servers. ## API credits are not link credits API credits pay for data calls and paid indexing. **Link credits** pay for placements in the [Link Network](https://docs.crakseo.com/pricing/link-network.md) and only come with that plan. The two balances are separate, and buying one never changes the other or your subscription. ## Refunds Unused API credits can be refunded within the window stated in the [terms](https://crakseo.com/terms). Credits already spent on calls aren't refundable. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.