Community Projects
Building infrastructure for financial sovereignty and digital independence. These projects serve the Bitcoin and cypherpunk communities in Barcelona and beyond.
All services are provided freely. Donations gratefully accepted but never required.
Barcelona Bitcoin Only
Restarted in 2022 | Website | Meetup
Monthly meetups for Bitcoin-only discussions, education, and community building in Barcelona. No shitcoins, no noise—just signal.
The story of why and how this was restarted deserves its own post. Coming soon.
Support: btcpay.bitcoinbarcelona.xyz
Barcelona Cyphers Conference
Organized in 2025 with two friends. An event bringing together cypherpunks, Bitcoin builders, and sovereign minds.
Our friend Şela wrote an excellent summary: BCC8333: Cypherpunks and Sovereign Minds
This conference embodied the intersection of cryptography, freedom technology, and community resilience. Maybe next edition for next halving.
Hierro Store
E-commerce for Bitcoin infrastructure:
- Bitcoin nodes (plug-and-play full nodes)
- GrapheneOS Pixel phones (privacy-focused mobile OS)
- Hardware for sovereign computing
Bitcoin-only. Self-custody focused. Privacy respecting.
Public BTCPay Server
Free BTCPay Server instance for merchants who want to accept Bitcoin without depending on payment processors.
No KYC. No fees. No middlemen. Just peer-to-peer electronic cash.
If you’re a merchant wanting to accept Bitcoin, this instance is available for your use. Self-custody payments directly to your wallet.
Public Bitcoin Infrastructure
Fulcrum Server (Electrum SPV)
ssl://fulcrum.airdns.org:65138
Fast SPV server for Bitcoin wallets. Connect your Electrum, Sparrow, or other compatible wallet.
⚠️ Warning: Logging enabled for operational purposes. If privacy is critical, run your own node.
Mempool Instance
Public mempool explorer for Bitcoin blockchain and mempool analysis.
Philosophy
These projects exist because infrastructure for freedom shouldn’t be locked behind paywalls or corporate control.
Everything runs on self-hosted infrastructure. Nothing depends on third-party services that could disappear or change terms.
Operating costs: Covered personally or through community donations.
Business model: There isn’t one. This is public infrastructure.
Support: Donations welcome but never required.
- Personal: pay.federicociro.com
- Barcelona Bitcoin Only: btcpay.bitcoinbarcelona.xyz
Donations to Barcelona Bitcoin Only make me as happy as receiving them personally—they go toward building better community infrastructure.
Technical Stack
Curious about how these services run?
- Hosting: Self-hosted on Proxmox cluster
- Network: pfSense firewall with proper segmentation
- Payments: BTCPay Server (self-hosted)
- Bitcoin nodes: Bitcoin Core + Fulcrum
- Monitoring: Prometheus + Grafana
- Backups: Encrypted, redundant, off-site
Detailed implementation guides for each project coming in individual posts.
Get Involved
Use the services: That’s why they exist.
Run your own: Even better. Decentralization matters.
Join the community: Come to Barcelona Bitcoin Only meetups or reach out via the About page.
Contribute: Technical contributions, documentation improvements, and community building always welcome.
“Cypherpunks write code. We know that someone has to write software to defend privacy, and since we can’t get privacy unless we all do, we’re going to write it.”
— Eric Hughes, A Cypherpunk’s Manifesto