Mempool space
Open-source Bitcoin block explorer and mempool visualizer.
Open the official app on mempool.space
This tool is hosted by its maintainers. Click below to open mempool.space in a new tab — it's their official demo.
Browse network tools →What's next with Mempool space?
Choose how you want to get started.
Use it free
Open the official tool or demo — no account needed.
Self-host it
Run the open-source version on your own infrastructure.
What is Mempool space?
Mempool.space is an open-source tool designed to visualize and analyze the Bitcoin network's mempool—a temporary storage area where unconfirmed transactions wait to be included in blocks. It serves as a centralized platform for monitoring transaction fees, network congestion, and real-time blockchain activity. Developers, node operators, and cryptocurrency enthusiasts use it to optimize transaction fees, debug network issues, and gain insights into Bitcoin's transaction fee market. The tool addresses the challenge of tracking unconfirmed transactions, which can delay confirmations and inflate fees during high-network activity. By providing transparent data on mempool behavior, it users to make informed decisions about transaction prioritization and network participation.
How it works
Mempool.space is a web-based explorer and API service that provides real-time visibility into the Bitcoin network's mempool. It aggregates data from full nodes to display unconfirmed transactions, fee rates, and network congestion levels. The tool is operated as a public service to support Bitcoin's decentralized ecosystem. Its primary purpose is to help users understand how transactions are processed, estimate optimal fees, and monitor network health. By visualizing the mempool, it enables developers and node operators to troubleshoot issues like transaction delays or fee miscalculations. Mempool.space offers real-time mempool statistics, including transaction fee rates, block confirmation times, and network throughput. It also provides API access for integrating mempool data into custom applications. The tool supports self-hosting via one-click installations on Raspberry Pi-based full-node distros like Umbrel and Raspiblitz, allowing users to run their own instances.
How to use it
- 1Install a Raspberry Pi full-node distro like Umbrel or Raspiblitz. 2. Use the one-click installer provided by the Mempool project to deploy the tool. 3. Configure the instance by selecting a Bitcoin network and setting up API endpoints. 4. Access the web interface via the Raspberry Pi's IP address to view mempool data. Practical tips: Ensure your node is synchronized with the Bitcoin network before deployment. Use the built-in API to integrate mempool data into third-party tools. Regularly update the instance to benefit from community-driven improvements.
What it can do
- bitcoin explorer
Use cases
Assumptions and limitations
Assumptions
- source: https://github.com/mempool/mempool
- license: GPL-3.0 — free to use
- privacy: Self-hosted — you control your data
Limitations
- Depends on a fully synchronized Bitcoin node for accurate data, increasing hardware requirements
- Limited support for non-Bitcoin blockchain networks beyond the core Bitcoin ecosystem
- Self-hosting requires technical expertise to configure and maintain the full-node environment
- Real-time data may experience latency due to reliance on node synchronization speeds
- API access is restricted to registered users, limiting programmatic integration options
Understanding the result
Open-source Bitcoin block explorer and mempool visualizer.
Tool details
- Clearly flagged when a network request is needed.
- No account, no sign-up, and no tracking of your content.
- Powered by (GPL-3.0).
- Built with
- (mempool/mempool)
- License
- GPL-3.0
- Runs locally
- No — requires a network request
- Verification
- Not yet verified
- Input
- Query
- Output
- Text
Built with mempool/mempool. OpenToolVault provides the discovery and browser interface while crediting the original project maintainers.
- Built with
- License
- GPL-3.0
Open-source project
OpenToolVault is an independent directory. We are not affiliated with or endorsed by this project.
References
- / — GitHub Repository
Upstream project · GitHub
- GPL-3.0 License
Upstream project
Frequently asked
How does Mempool.space collect and display mempool data?
Mempool.space gathers data from Bitcoin full nodes by querying their mempool information. It aggregates this data to show real-time statistics like transaction fee rates, unconfirmed transaction counts, and block propagation delays. The tool visualizes this information through web-based dashboards and API endpoints, allowing users to monitor network activity without running their own node.
Can I run Mempool.space on hardware other than Raspberry Pi?
While the project provides one-click installations for Raspberry Pi-based distros, Mempool.space can technically run on any system capable of hosting a Bitcoin full node. Users can deploy it on dedicated servers or virtual machines, though this requires manual configuration of the underlying infrastructure and node synchronization.
How do I troubleshoot a 'Connection refused' error when accessing Mempool.space?
Verify that your Raspberry Pi's firewall allows incoming connections on the web server port (typically 80 or 443). Check if the node synchronization is complete and the mempool data is being properly exported. Ensure the Raspberry Pi's IP address is correctly configured in your network settings and that the web interface is accessible via the correct URL.
How does Mempool.space compare to alternatives like Blockchair or Blockstream Explorer?
Unlike Blockchair or Blockstream Explorer, Mempool.space focuses specifically on mempool analysis and fee market data, offering deeper insights into unconfirmed transactions. It provides API access for developers and supports self-hosting, whereas alternatives like Blockchair are primarily centralized explorers without mempool visualization capabilities. Blockstream Explorer, while comprehensive, lacks the granular fee rate analysis available in Mempool.space.
What should I do if my self-hosted Mempool instance shows outdated data?
Ensure your Bitcoin node is fully synchronized and that the Mempool instance is correctly configured to pull data from the node. Check for any network connectivity issues between the node and the Mempool service. If using a Raspberry Pi distro, verify that the one-click installation completed successfully and that the node's RPC credentials are correctly set in the Mempool configuration file.