# Page Not Found

The URL `guides/building-a-pay-per-request-blockchain-api-with-x402-+-getblock` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [How to Build a Pay-Per-Request Blockchain API With x402 and GetBlock](https://docs.getblock.io/guides/how-to-build-a-pay-per-request-blockchain-api-with-x402-and-getblock.md)
- [How to Build a Hyperliquid Whale Tracker Bot with GetBlock](https://docs.getblock.io/guides/how-to-build-a-hyperliquid-whale-tracker-bot-with-getblock.md)
- [How to Build Pump.fun to PumpSwap and Raydium Migrations Listener with GetBlock](https://docs.getblock.io/guides/how-to-build-pump.fun-to-pumpswap-and-raydium-migrations-listener-with-getblock.md)
- [How to Listen to High-Value SOL Transactions via Yellowstone Geyser gRPC with GetBlock](https://docs.getblock.io/guides/how-to-listen-to-high-value-sol-transactions-via-yellowstone-geyser-grpc-with-getblock.md)
- [How to Build Basic-level Model-Context Protocol with GetBlock API Endpoints](https://docs.getblock.io/guides/how-to-build-basic-level-model-context-protocol-with-getblock-api-endpoints.md)

## How to find the correct page

If the exact page cannot be found, you can still retrieve the information using the documentation query interface.

### Option 1 — Ask a question (recommended)

Perform an HTTP GET request on the documentation index with the `ask` parameter:

```
GET https://docs.getblock.io/guides/how-to-build-a-pay-per-request-blockchain-api-with-x402-and-getblock.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

### Option 2 — Browse the documentation index

Full index: https://docs.getblock.io/sitemap.md

Use this to discover valid page paths or navigate the documentation structure.

### Option 3 — Retrieve the full documentation corpus

Full export: https://docs.getblock.io/llms-full.txt

Use this to access all content at once and perform your own parsing or retrieval. It will be more expensive.

## Tips for requesting documentation

Prefer `.md` URLs for structured content, append `.md` to URLs (e.g., `/guides/how-to-build-a-pay-per-request-blockchain-api-with-x402-and-getblock.md`).

You may also use `Accept: text/markdown` header for content negotiation.