Blocknative MCP. Get real-time Ethereum gas price suggestions.
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Blocknative (Ethereum Mempool API) provides real-time gas price suggestions using live mempool data. This server fetches current gas prices, categorized by confidence levels (99%, 95%, 70%).
It lets you compare different gas price tiers to balance transaction cost against required speed for any Ethereum operation.
What your AI agents can do
Get gas prices
Retrieves real-time gas price suggestions for Ethereum, showing tiered costs based on inclusion confidence.
The server returns current gas price suggestions, categorized by confidence levels (e.g., 99%, 70%).
The server accesses live mempool data to gauge current network activity and potential demand spikes.
The server allows comparison of gas price tiers, helping the user balance transaction cost against required inclusion speed.
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019e5d00get gas prices
Retrieves real-time gas price suggestions for Ethereum, showing tiered costs based on inclusion confidence.
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What you can do with this MCP connector
Blocknative's API lets you get real-time gas price suggestions straight into your agent. It monitors the Ethereum mempool so you can nail the balance between transaction cost and speed.
Using get_gas_prices, you get current gas price suggestions for Ethereum, showing tiered costs based on inclusion confidence. You can check gas prices categorized by confidence levels like 99%, 95%, and 70%. You access live mempool data to gauge current network activity and potential demand spikes. You compare gas price tiers to balance transaction cost against required inclusion speed.
How Blocknative MCP Works
- 1 Subscribe to the Blocknative server and input your API Key.
- 2 Prompt your AI client with a request for current gas prices (e.g., 'Check the gas prices for Ethereum').
- 3 The server executes the
get_gas_pricestool and returns structured data showing suggested fees across different confidence tiers.
The bottom line is, you get a clear, data-backed estimate of the cost and speed needed for any Ethereum transaction.
Who Is Blocknative MCP For?
Web3 developers need this when they can't afford stuck transactions or overpaying for gas. DeFi traders rely on it to time swaps and liquidity provisions during gas spikes. Crypto enthusiasts use it when they need a quick check of network health without opening a separate explorer tab.
Monitors gas spikes via the get_gas_prices tool to time complex swaps or liquidity provision during low-cost windows.
Integrates the get_gas_prices tool into deployment scripts to calculate and prevent overpaying or failing transactions.
Quickly checks network congestion and optimal transaction timing by running a gas price check before advising a client.
What Changes When You Connect
- Saves you from overpaying. By fetching gas price suggestions, you avoid sending transactions with insufficient fees or paying too much for speed.
- Pinpoints optimal timing. You can check network congestion and gas price trends to time your DeFi swaps or liquidations perfectly.
- Removes guesswork from deployment. Developers can integrate
get_gas_pricesinto their workflow to calculate transaction costs before code execution. - Compares risk vs. cost. The server lets you compare gas price tiers—balancing if you want a cheaper transaction (lower confidence) or a guaranteed fast one (high confidence).
- Simplifies network health checks. Instead of opening a separate explorer, you ask your agent for the latest gas prices to gauge overall network activity.
Real-World Use Cases
Timing a large DeFi swap
A DeFi trader needs to execute a multi-asset swap. Instead of guessing, they ask their agent to run get_gas_prices. The agent returns data showing a temporary dip in the 95% confidence tier. The trader executes the swap during that window, saving significant gas costs.
Validating a smart contract deployment
A Web3 developer is ready to deploy a new contract. They run get_gas_prices to confirm the current cost structure. The server shows the 99% tier is spiking, alerting the developer to pause deployment until fees drop.
Assessing network readiness
A crypto analyst needs to advise a client on a time-sensitive trade. They ask their agent to check the gas prices. The server confirms elevated prices and high demand, warning the analyst that the client should wait 30 minutes.
Comparing transaction speed options
A user needs to transfer assets but isn't sure if they need maximum speed. They run get_gas_prices and see two tiers. They decide the 95% confidence level meets their needs, balancing speed against a lower fee.
The Tradeoffs
Guessing the gas price
Manually checking a gas price website and assuming the number will hold true for the next hour. This ignores immediate mempool spikes, leading to transactions that get stuck or fail.
→
Run the get_gas_prices tool. It reads live mempool data to provide accurate, current suggestions based on real-time network demand, eliminating guesswork.
Using outdated gas data
Relying on a cached or historical gas price feed. When a major event happens on Ethereum, the price can spike instantly, making old data useless.
→
Always call get_gas_prices through your agent. The server uses live mempool data to ensure the estimates are current to the second.
Ignoring confidence levels
Using only the lowest suggested gas price to save money, only to have the transaction fail because the network demand spiked unexpectedly.
→
Use get_gas_prices and consider the confidence tiers. The tool shows structured suggestions (99%, 95%, 70%), allowing you to choose the right balance of risk and cost.
When It Fits, When It Doesn't
Use this server if your process requires knowing the current, real-time cost and speed of an Ethereum transaction. It's critical for automated actions, like deploying a smart contract or executing a DeFi swap, where failure costs money. Don't use it if you just need general crypto market sentiment; that requires a different type of data feed. If you only need historical price charts, you need a dedicated time-series database tool instead. This server only provides a snapshot of current mempool conditions.
Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Blocknative. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.
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Works with Claude, ChatGPT, Cursor, and more
The Model Context Protocol standardizes how applications expose capabilities to LLMs. Instead of operating in isolation, your AI gains direct access to external platforms, live data, and real-world actions through secure, standardized connections.
This server provides 1 capabilities that interface natively with Claude, ChatGPT, Cursor, and any MCP client. No middleware. No custom integration required.
Available Capabilities
Manually checking gas prices is a race against the clock.
Right now, predicting gas costs means switching between multiple sites—checking an explorer for the current price, then opening a separate calculator to understand the fee structure. You’re constantly copy-pasting data and waiting for manually updated feeds that might already be stale by the time you read them.
With this MCP server, you ask your agent for gas prices. It runs the `get_gas_prices` tool and gives you a single, structured output that shows multiple confidence tiers. You instantly know the cost/speed trade-off without leaving your chat window.
Blocknative (Ethereum Mempool API) MCP Server: Get real-time gas price suggestions.
Before, you had to run multiple API calls: one for the base fee, one for the priority fee, and another to check the current mempool activity. This was slow, complex, and often incomplete.
Now, you run one command. The server handles the complexity of the mempool and returns a complete cost analysis. It’s a single, actionable data point that makes the next step clear.
Common Questions About Blocknative MCP
How does Blocknative (Ethereum Mempool API) calculate gas prices? +
The server uses live mempool data to provide suggestions. It doesn't just give one number; it offers tiered prices based on the likelihood of inclusion (99%, 95%, etc.).
Can I use the get_gas_prices tool for other networks besides Ethereum? +
No. This server is specifically designed for the Ethereum network and reads data from the Ethereum mempool.
How often does the get_gas_prices tool update? +
It provides real-time suggestions based on the live mempool. You'll get immediate updates reflecting current network activity and demand spikes.
What is the difference between the confidence tiers in get_gas_prices? +
The tiers represent the likelihood of your transaction being included in the next block. 99% is the highest confidence, meaning you pay for maximum certainty.
When should I use the `get_gas_prices` tool for transaction planning? +
Use get_gas_prices before initiating any transaction. This checks current network conditions and suggests the best mix of base and priority fees for the desired speed and cost.
What happens if I run `get_gas_prices` multiple times in quick succession? +
The server handles rapid calls by providing the most recent data available. While it won't fail, excessive calls might hit rate limits, so it's best to space them out.
Does the `get_gas_prices` tool require specific Ethereum addresses? +
No, the tool reads general network mempool data. It provides system-wide gas price estimates, regardless of which specific wallet or address you plan to use.
Are there any data limitations or restrictions when calling `get_gas_prices`? +
The tool provides real-time data derived from Blocknative's mempool monitoring. You are limited only by the current market activity and the API's published rate limits.
How can I get the most accurate gas price for an urgent Ethereum transaction? +
Use the get_gas_prices tool. It fetches high-confidence suggestions directly from Blocknative's mempool monitoring, providing you with the exact values needed for rapid inclusion.
What confidence levels does the gas price tool provide? +
The get_gas_prices tool returns estimations for various confidence intervals (typically 99%, 95%, 90%, 80%, and 70%), allowing you to choose the right balance between cost and certainty.
Does this tool monitor the live Ethereum mempool? +
Yes. The get_gas_prices action leverages Blocknative's global node network to analyze pending transactions in the mempool, ensuring the suggestions reflect current network conditions.
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