# Building Solana data flows: Using n8n to automate block height extraction through GetBlock’s RPC infrastructure

icecoltt-dev — Sun, 19 Apr 2026 19:42:45 +0000

The Solana ecosystem moves incredibly fast. With block times sitting around 400 milliseconds, anyone building automated workflows, indexing tools, or real-time analytics dashboards runs into one major challenge: RPC reliability and latency.

If you depend on overloaded public endpoints, your automation is always one delay away from breaking. When a pipeline starts lagging or drops requests, the whole workflow can fall apart. In this breakdown, I’ll show how to build a more reliable data extraction setup using n8n (a visual workflow automation tool) together with the RPC infrastructure from GetBlock.

Instead of writing everything from scratch, we can use n8n’s visual node system to make a direct HTTP JSON-RPC request to a GetBlock Solana endpoint and pull the current network block height cleanly.

The Proof of Work: Setup & Execution

For this setup, the goal is to avoid unnecessary code and focus on clean, modular HTTP requests that make the data flow more dependable.

1. The Infrastructure (GetBlock):
To avoid rate limits and keep execution stable, I set up a private Solana RPC endpoint through GetBlock. That gives me a dedicated path to blockchain data without the instability, noise, and dropped connections that often come with public endpoints.

2. The Logic Engine (n8n):
Inside n8n, the workflow is simple but effective. The core of it is an HTTP Request Node configured with these settings:

Method: POST
URL: https://go.getblock.us/aa464963************************
Authentication: Managed securely through the dedicated GetBlock endpoint URL.
Body Content Type: JSON

The JSON Payload:
To fetch the current block height, we send the standard Solana JSON-RPC payload:
{ "jsonrpc": "2.0", "id": 1, "method": "getBlockHeight" }

Empirical Results: Workflow Performance

The execution results confirm that the setup works as expected. The n8n node successfully sent the payload through the GetBlock RPC endpoint and returned the current Solana Mainnet block height in real time.

If you look at the performance data from the n8n execution log, the full workflow—from triggering the node, processing the HTTP POST request, querying Solana through GetBlock, and returning the parsed JSON response—finished in exactly 1.003s.

That detail matters: this number is not just the raw RPC response time. It reflects the complete execution time of the n8n workflow itself. For a visual automation pipeline handling HTTP routing and JSON parsing, finishing the full process in about 1 second is a strong result. GetBlock handled the RPC request smoothly, and n8n processed the data without any friction.

Why This Matters for HFT & MEV on Solana

When a visual pipeline can complete its full cycle in about 1 second, it’s a strong sign that the RPC layer underneath is handling the real workload efficiently. And once you take that same logic out of n8n and apply it to high-frequency trading (HFT) or MEV strategies, that kind of reliability starts to matter in a very real way.

Based on GetBlock’s benchmarks, their dedicated low-latency Solana nodes can help transactions land in around 200ms to 2s, compared with the typical 5–10s you often see on public RPCs. When you’re competing for execution inside extremely tight windows, a 95%+ landing probability can be the difference between capturing the opportunity and missing it completely.

Public RPCs also tend to suffer from head lag. With a dedicated setup like the one I tested, you may see a 100–150ms improvement in head-lag because of faster shred reception. And in Solana, seeing block state even 150ms earlier than the broader market can be enough to make the winning move.

Final Thoughts

Building automated workflows doesn’t need to turn into a mess of dropped requests and rate-limit issues. By combining n8n’s visual workflow builder with GetBlock’s execution-focused infrastructure, you can put together reliable, low-latency data pipelines much faster than you would by building everything from scratch.

Call to Action: If you’re building bots, indexers, or automated workflows on Solana, it may be time to move away from overloaded public endpoints.

👉 Explore GetBlock Solana nodes: https://getblock.io/chains/solana

Learn more about GetBlock:

Website: https://getblock.io
X (Twitter): @getblockio

DEV Community: icecoltt-dev

# Building Solana data flows: Using n8n to automate block height extraction through GetBlock’s RPC infrastructure

The Proof of Work: Setup & Execution

Empirical Results: Workflow Performance

Why This Matters for HFT & MEV on Solana

Final Thoughts