Please read these terms carefully before accessing or using the BTC21 public Bitcoin full node, Esplora block explorer, raw transaction broadcaster, or APIs. BTC21's core public infrastructure is currently provided free of charge as an independent community contribution and is provided strictly on an "AS IS" basis with zero liability and zero warranties.
Published: September 1, 2026 · Effective: Immediately · Applies to explorer.btc21.cc and btc21.cc
Operator
BTC21 is an independent public Bitcoin infrastructure project operated by Bitseeker LLC, a Wyoming limited liability company ("Bitseeker," "Operator," "we," "us," or "our"). BTC21 remains the public-facing project identity; Bitseeker LLC is the responsible operator.
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Critical Notice: Zero Liability & No Wallet Custody
WE ARE NOT A WALLET. WE DO NOT HOLD BITCOIN. WE NEVER HAVE ACCESS TO YOUR KEYS.
BTC21 does not provide wallet services, custody, or financial brokerage. NEVER transmit, enter, or expose your private keys, seed phrases, or wallet credentials anywhere on this site. If you expose your keys or send Bitcoin to an address, BTC21 has no technical or legal ability to recover, refund, or reverse your actions. This free public server is used entirely at your own risk.
Section 01
Nature of Service & Free Community Contribution
The websites, servers, APIs, public Electrum server interfaces, and peer-to-peer services located at btc21.cc, explorer.btc21.cc, and electrum.btc21.cc (including the Electrum JSON-RPC interface on port 50002) (collectively, the "Service") comprise BTC21, an independent public Bitcoin infrastructure project operated by Bitseeker LLC. The Operator maintains dedicated bare-metal computer hardware to support Bitcoin network verification and decentralization.
No account, subscription, or payment is currently required to use the public services described on this site. BTC21 may add, change, or discontinue features or services in the future. By accessing, browsing, or utilizing any portion of the Service, including the block explorer interface, Electrum server endpoints, HTTP APIs, or P2P node connections, you agree to be bound by these Terms of Service. If you do not agree to these Terms, you must cease all access and use.
Section 02
Absolute Disclaimer of Wallet, Custody, or Financial Services
BTC21 is NOT a cryptocurrency exchange, wallet provider, custodian, bank, depository, money transmitter, broker, or financial intermediary under any jurisdiction.
No Wallet Generation: We do not create, host, manage, or provide cryptocurrency wallets.
No Key Management: We do not generate, view, hold, store, or have access to private cryptographic keys, seed phrases (BIP39 mnemonics), or passphrases.
No Custody of Funds: We do not hold, receive, custody, or manage Bitcoin, satoshis, tokens, or fiat currency on behalf of anyone.
Client Independence: Any cryptographic wallet software you operate (for example, Bitcoin Core, Sparrow, Electrum, Trezor, Ledger, Coldcard, or BlueWallet) is completely autonomous and external to BTC21. Mentioning, linking to, or displaying the name of any such project does not create a relationship with BTC21.
Absolute Rule: We have no keys. We have no Bitcoin. We have no customer accounts. If you lose your keys, forget your passphrase, or send funds to an erroneous address, BTC21 cannot assist you in any way.
Section 03
Strict Prohibition: Never Send Private Keys, Seed Phrases, or Bitcoin
Under no circumstances should you ever transmit, paste, submit, or reveal a private key, mnemonic seed phrase, recovery passphrase, or wallet credentials to BTC21, whether via the explorer search bar, transaction broadcaster, API parameters, contact channels, or otherwise.
WARNING: BTC21 WILL NEVER ASK YOU FOR A PRIVATE KEY OR SEED PHRASE. ANY REQUEST FOR PRIVATE KEYS PURPORTING TO COME FROM BTC21 IS A FRAUDULENT IMPERSONATION. IF YOU ENTER A PRIVATE KEY OR SEED PHRASE ANYWHERE ON THE INTERNET, YOUR BITCOIN WILL LIKELY BE STOLEN. BTC21 DISCLAIMS ALL RESPONSIBILITY FOR LOSSES RESULTING FROM COMPROMISED KEYS.
Do not send Bitcoin to BTC21: BTC21 does not maintain public deposit addresses or solicit donations. If you broadcast an on-chain transaction to an address you viewed or discovered while using this block explorer, that transaction is executed permanently on the Bitcoin blockchain. BTC21 does not hold custody of those funds and has no mechanism to recover, refund, or redirect them.
Section 04
No Financial, Investment, Tax, or Legal Advice
All information, data, block statistics, mempool metrics, difficulty adjustments, fee recommendations, and market price snapshots displayed on the Service are provided solely for educational, technical, and informational purposes.
Nothing on this Service constitutes financial, investment, legal, tax, or accounting advice.
Price feeds (such as BTC/USD spot reference, MSTR, or STRC indicators) are third-party telemetry provided without verification or warranty. "Bitcoin yield" references describe external corporate metrics and do not represent a return, yield, or investment product offered by BTC21.
Decisions to buy, sell, hold, or transact Bitcoin are your sole responsibility. You should consult qualified financial and legal advisors before engaging in any transaction.
Section 05
Nature of the Bitcoin Blockchain & Raw Transaction Broadcaster
The Bitcoin network is a decentralized, peer-to-peer cryptographic protocol governed by autonomous consensus rules and miner incentives. Transactions broadcast to the network are irreversible and permanent once confirmed.
When you use the BTC21 raw transaction broadcast tool (either via the web interface or the /api/broadcast endpoint):
Pass-Through Relay Only: BTC21 merely submits your pre-signed hexadecimal transaction payload to its local Bitcoin Core mempool. We do not construct, sign, alter, validate the financial intent of, or guarantee the execution of your transaction.
No Guarantee of Relay or Mining: BTC21 makes NO warranty or guarantee that your transaction will be accepted by our mempool, relayed to peer nodes, accepted by miners, or included in a mined block. Transactions may be rejected due to insufficient miner fees, non-standard outputs, double-spend conflicts, mempool congestion, or node restarts.
No Liability for Stuck or Delayed Transactions: BTC21 is not liable for delayed broadcasts, dropped transactions, miner fee spikes, replacement-by-fee (RBF) collisions, chain reorganizations, or any resulting financial losses.
Independent Verification Required: You are solely responsible for verifying the status, confirmation depth, and validity of your transactions across multiple independent Bitcoin full nodes and explorers.
Section 05B
Public Electrum Server & Light Wallet Connectivity (Port 50002)
BTC21 operates a public Electrum JSON-RPC protocol server accessible over encrypted SSL/TLS on port 50002 at electrum.btc21.cc:50002 and btc21.cc:50002. This service is provided as a non-custodial, open network utility designed to allow compatible light wallet clients (including Sparrow Wallet, Electrum Desktop, BlueWallet, Specter Desktop, BitBoxApp, and hardware wallet coordinators) to synchronize public blockchain data, query address script hash histories, and relay user-signed transactions.
No Custody or Key Access: Connecting your wallet to BTC21 does NOT grant BTC21 access to or control over your private keys, recovery seed phrases, xpubs, or bitcoin. All cryptographic signing takes place strictly within your local wallet software on your own hardware device.
Informational Blockchain State Only: Balance calculations, transaction lists, and unspent transaction outputs (UTXOs) returned over port 50002 reflect the local indexing state of our Bitcoin Core node. During initial sync, reindexing, or network reorganizations, returned data may temporarily differ from other nodes. You are solely responsible for verifying transactions across multiple independent sources.
Zero Liability for Wallet Software or Drops: BTC21 is not liable for dropped connections, socket resets, broadcast delays, transaction rejections by miners, or software defects, bugs, or vulnerabilities in third-party wallet software or server daemons.
Electronic Assent by Connection (Equivalent to Clicking "Accept"): Because light wallet protocols connect directly over network sockets without an interactive web account gateway or login screen, the act of directing your client software to connect to electrum.btc21.cc:50002, initiating an RPC handshake, or querying script hashes constitutes your voluntary, legally binding electronic acceptance of these Terms with the exact same legal force and effect as pressing an "Accept" button. If you do not agree to every clause within these Terms, you are strictly prohibited from connecting your wallet to this server.
Financial Privacy Notice: The Electrum protocol transmits your wallet's script hashes to the server. BTC21 does not use these requests to create persistent wallet profiles or an index linking IP addresses to queried addresses. Standard connection and security data may nevertheless be processed and retained for limited operational and abuse-prevention purposes as described in the Privacy Policy. Your IP address is visible at the transport layer on clearnet. For stronger network privacy, consider routing your wallet client through Tor.
Absolute Rule for Electrum Users: You connect your wallet to this community-run server entirely at your own risk. Connecting your wallet serves as your legally binding acceptance of these Terms. BTC21 bears zero liability for any loss of funds or wallet malfunctions.
Section 06
"AS IS" & "AS AVAILABLE" Disclaimer of All Warranties
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE SERVICE, SITES (BTC21.CC, EXPLORER.BTC21.CC, AND ELECTRUM.BTC21.CC), ELECTRUM PROTOCOL SERVER (PORT 50002), ENDPOINTS, APIS, DATA, AND ALL ASSOCIATED HARDWARE AND SOFTWARE ARE PROVIDED STRICTLY ON AN "AS IS", "AS AVAILABLE", AND "WITH ALL FAULTS" BASIS.
THE OPERATOR AND BTC21 EXPRESSLY DISCLAIM ALL WARRANTIES OF ANY KIND, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES OF TITLE, MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, FREEDOM FROM COMPUTER VIRUSES OR HARMFUL CODE, ACCURACY, TIMELINESS, NON-INFRINGEMENT, OR UNINTERRUPTED AVAILABILITY.
WE MAKE NO REPRESENTATION OR WARRANTY THAT: (A) THE SERVICE WILL MEET YOUR REQUIREMENTS; (B) THE SERVICE WILL BE SECURE, TIMELY, CONTINUOUS, OR ERROR-FREE; (C) THE RESULTS OR BLOCK DATA OBTAINED WILL BE ACCURATE, COMPLETE, OR RELIABLE; OR (D) ANY HARDWARE DEFECTS, SOFTWARE BUGS, OR SYNCHRONIZATION LAGS WILL BE CORRECTED.
Section 07
Total Limitation of Liability & Absolute Zero-Dollar ($0.00) Cap
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL BTC21, BITSEEKER LLC, CONTRIBUTORS, AFFILIATES, AGENTS, DATA CENTER HOSTS, OR INFRASTRUCTURE PROVIDERS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, PUNITIVE, OR EXEMPLARY DAMAGES WHATSOEVER.
THIS INCLUDES, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BITCOIN, LOSS OF SATOSHIS, LOSS OF CRYPTOGRAPHIC KEYS, CORRUPTED WALLETS, LOSS OF PROFITS, LOSS OF REVENUE, BUSINESS INTERRUPTION, DATA LOSS, HARDWARE FAILURE, OR ANY OTHER PECUNIARY OR NON-PECUNIARY LOSS ARISING OUT OF OR IN CONNECTION WITH:
1. YOUR USE OF, RELIANCE ON, OR INABILITY TO USE THE SERVICE;
2. ANY DELAY, FAILURE, REJECTION, OR OMISSION IN RELAYING OR MINING TRANSACTIONS;
3. ERRORS, INACCURACIES, OR OMISSIONS IN BLOCKCHAIN DATA, FEE ESTIMATES, OR MEMPOOL STATUS;
4. HARDWARE CRASHES, POWER OUTAGES, NETWORK ATTACKS, OR SERVER DOWNTIME; OR
5. ANY UNAUTHORIZED ACCESS, HACKING, EXPLOITS, OR SECURITY BREACHES.
BECAUSE BTC21'S CORE PUBLIC INFRASTRUCTURE IS CURRENTLY PROVIDED WITHOUT CHARGE AS A COMMUNITY CONTRIBUTION, UNDER NO CIRCUMSTANCES SHALL THE AGGREGATE TOTAL LIABILITY OF BTC21 AND BITSEEKER LLC EXCEED ZERO UNITED STATES DOLLARS ($0.00 USD).
Section 08
Assumption of Risk by the User
By using the Service, you expressly acknowledge and accept the inherent risks of interacting with cryptographic systems, peer-to-peer networks, and decentralized software, including:
Irreversibility: Bitcoin transactions cannot be canceled, amended, or reversed by anyone once confirmed.
Self-Custody Responsibility: You alone are responsible for safeguarding your private keys, seed phrases, and computing environment against malware, phishing, and theft.
Network Volatility: Miner transaction fees, confirmation times, and mempool conditions fluctuate dynamically and unpredictably based on global market supply and demand.
Protocol Consensus & Forks: The Bitcoin protocol may experience chain reorganizations, soft forks, hard forks, or mempool policy adjustments outside the control of any single node operator.
Section 09
User Conduct, Acceptable Use & Defensive Security Enforcement
To preserve this free public service for genuine Bitcoin peers and users, you agree not to abuse, attack, or degrade our infrastructure. Specifically, you agree NOT to:
Launch Denial-of-Service (DoS/DDoS) attacks, flood attacks, or automated stress tests against our web endpoints, APIs, or P2P daemon.
Attempt to circumvent rate limits, access controls, or Proof-of-Work anti-spam filters.
Deploy aggressive, unthrottled scraping bots that consume excessive server CPU, memory, or bandwidth.
Scan for vulnerabilities, exploit server daemons, inject malicious payloads, or attempt unauthorized access.
Utilize the Service for any unlawful or fraudulent purpose under applicable laws.
Automated Defensive Measures Active: BTC21 actively runs kernel firewall packet filters, automated Fail2ban intrusion-detection jails, Nginx rate-limiting modules, and cryptographic Proof-of-Work anti-spam challenges. We reserve the unrestricted, unilateral right to throttle, drop, block, or permanently ban any IP address, subnet, or user agent engaging in malicious, abusive, or automated flood activity without prior notice or liability.
Section 10
Indemnification & Hold Harmless
You agree to defend, indemnify, and hold harmless BTC21, Bitseeker LLC, its contributors, and hosting providers from and against any and all claims, actions, suits, demands, damages, losses, liabilities, costs, and expenses (including reasonable attorneys' fees and court costs) arising out of or relating to:
Your use or misuse of the Service, APIs, node, or raw transaction broadcaster;
Any transaction you craft, sign, broadcast, or attempt to broadcast using the Service;
Your breach or violation of any provision of these Terms of Service; or
Your violation of any rights of any third party or any applicable laws or regulations.
BTC21 is powered by open-source technologies created by the global Bitcoin and free-software communities, including:
Bitcoin Core: The reference full node implementation, released under the MIT License.
Esplora: The open-source block explorer interface originally developed by Blockstream and contributors, released under the MIT License.
Electrs: The efficient Electrum and Esplora index server written in Rust, released under the MIT License.
Linux & Nginx: Operating system and web server platforms powering bare-metal deployment.
The FAQ pages and other Service materials may also link to independent third-party documentation or products, including Bitcoin Core, Electrum, Sparrow Wallet, BlueWallet, Bitcoin.org, and other resources. These links are supplied solely as optional informational references and may open a new browser tab. BTC21 does not control, review continuously, warrant, recommend, endorse, sponsor, affiliate with, represent, or act on behalf of any third party or its products, services, content, security practices, availability, or policies. No third party endorses, sponsors, authorizes, or is affiliated with BTC21 merely because it is named or linked here.
All names, logos, trademarks, service marks, trade dress, copyrights, and other intellectual-property rights belonging to third parties remain the property of their respective owners. BTC21 claims no ownership of them. Any use of a third-party name is nominative and solely to identify the relevant software, documentation, or resource; it does not imply affiliation, sponsorship, or endorsement by the owner.
Section 12
Governing Law, Class Action Waiver & Severability
Governing Law and Venue: These Terms and any dispute, claim, or controversy arising out of or relating to the Service, its operation, or these Terms shall be governed by and construed in accordance with the laws of the State of Wyoming, United States of America, without regard to its conflict-of-laws principles, except to the extent superseded by applicable federal law. To the maximum extent permitted by applicable law, any legal action or proceeding arising out of or relating to the Service or these Terms shall be brought in a court of competent jurisdiction located in the State of Wyoming, and each user consents to the jurisdiction and venue of such courts.
Dispute Resolution & Class Action Waiver: You agree that any dispute, controversy, or claim arising out of or relating to this Service or these Terms shall be resolved on an individual basis. YOU EXPRESSLY WAIVE ANY RIGHT TO COMMENCE, JOIN, OR PARTICIPATE IN ANY CLASS ACTION, COLLECTIVE PROCEEDING, MASS ARBITRATION, OR REPRESENTATIVE LAWSUIT AGAINST BTC21 OR BITSEEKER LLC.
Severability: If any provision of these Terms is determined by a court of competent jurisdiction to be invalid, illegal, or unenforceable, that provision shall be severed or limited to the minimum extent necessary, and the remaining provisions of these Terms shall continue in full force and effect.
Entire Agreement: These Terms constitute the entire agreement between you and BTC21 concerning your use of the Service, superseding all prior discussions, representations, or understandings.
Revisions: We reserve the right to revise or update these Terms at any time by posting the modified terms to this URL. Your continued access or use of the Service following any update constitutes your binding acceptance of the revised Terms.
Section 13
Operator Contact & Responsible Disclosure
For critical infrastructure security vulnerability disclosures, network peering inquiries, or formal legal notices regarding BTC21 node operations, you may contact Bitseeker LLC, the Operator, via the relay alias below.
Encrypted Relay Alias:
mortally-morally46 [at] bravealias [dot] com
Replace [at] with @ and [dot] with . to send. No plain mailto: link is published to prevent automated scraper bots and spam harvesting.
Strict Notice Regarding Inquiries: This inbox is monitored exclusively for server infrastructure security disclosures and formal legal matters. We do NOT provide wallet support, private key assistance, transaction acceleration, or general customer service. Any solicitations, commercial pitches, or requests for customer support will be discarded and permanently blocked.