API Terms and Conditions of License and Use

bitfly explorer gmbh, Wiedner Gürtel 9, 1100 Vienna Last updated: 22.09.2026

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Introduction

(A) The provider operates an application programming interface (“API service”) which registered customers are able to access via the website. The API service is provided for the purposes set out in these Terms and Conditions of License and Use. (B) By accessing the API service described below in this document, the customer declares with binding effect that it accepts and will comply with both the General Terms and Conditions and these API Terms and Conditions of License and Use. (C) The latest version of these Terms and Conditions of License and Use is available on the website https://beaconcha.in/. (D) The API service is intended exclusively for business customers as defined by the Austrian Business Code (UGB). Consumers are excluded from entering into contracts. The customer warrants that it is not a consumer within the meaning of the Austrian Consumer Protection Act (KSchG) and that this is therefore a business transaction for both parties.

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1. Registration

(1) The customer must have an account in accordance with section 1 of the General Terms and Conditions in order to access and use the provider’s API service. (2) The customer shall provide accurate and complete registration and company information and shall promptly update such information for the entire duration of the contractual relationship. (3) A valid API key is required to use the API service. The customer can access API keys via the user area on the website https://beaconcha.in/. The API key must be stated in the request header with each request in accordance with the provider’s technical API documentation. (4) The customer is under an obligation to protect the API key from unauthorised access by third parties and to use it exclusively within the scope of the agreed use.

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2. API service

(1) The provider currently operates multiple API services: beaconcha.in v1-API as well as beaconcha.in v2-API. (2) The customer can order the API service via the website https://beaconcha.in/pricing based on the service packages and prices offered there. The service packages include in each case access to the v1-API as well as the v2-API. (3) The content and scope of the API service are set out in the service specifications for the respective service packages. (4) The provider may offer a free tier for the API service. Unless otherwise stated in the pricing information, any free tier is granted exclusively as a one-time trial per customer (sole proprietor or legal entity) regardless of the number of employees or representatives for a period of up to 30 consecutive days starting with the first activation of the relevant API key. (5) The customer shall not attempt to obtain multiple free trials or otherwise circumvent the limitations of the free trial. The use of multiple accounts or identities per customer for the purpose of obtaining additional free trials is prohibited. (6) For the purpose of enforcing this restriction, the provider may determine whether multiple registrations relate to the same customer on the basis of objective indicators, including but not limited to email domain, billing details, legal entity identifiers, affiliated entities, responsible contact persons, technical usage patterns and other reasonably available evidence. (7) The provider may refuse, suspend, or revoke free-tier access, API keys or the associated account at any time if it reasonably suspects that the customer attempts to obtain multiple free trials or otherwise circumvents the limitations set out in sections 2 (5) and 2 (6). (8) The provider reserves the right to adjust the scope of the service packages on offer to technological developments, new functions or changes in market conditions at any time. Existing service packages will be assigned to the new service packages that have the corresponding functions. The provider shall be entitled to adjust prices if the cost factors relevant for the provision of services change (in particular staff, infrastructure, energy or license costs). Price adjustments will be communicated to the customer at least 30 days before these come into effect. The customer will be entitled to terminate the contractual relationship extraordinarily until the increase comes into effect (special right of termination). If the customer does not terminate the contract, the new prices and service content will be deemed to have been agreed. (9) The customer may only access the API within the scope of the usage limits and functions provided in the service package. The provider’s record of the API access performed under the respective customer account will be deemed binding unless there is an obvious and demonstrable error in recording this by the provider. (10) Once the usage limit recorded in the service package has been reached or the functional restrictions specified are exhausted, use of the API service will be suspended automatically. The customer may purchase an expanded service package (upgrade) at any time for additional API queries.

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3. API documentation

(1) The provider will provide the API service specified in the latest applicable API documentation to the customer exclusively for the functionalities specified there, whereby the provider shall be entitled to change and/or adapt the API service at any time. (2) Amendments to the API documentation will be announced on the provider’s website https://docs.beaconcha.in/api/overview and will be considered to be binding from that point onwards. The customer is under an obligation to read the latest applicable version of the published API documentation carefully and apply the same. (3) The provider assumes no responsibility for ensuring that the API documentation provided is compatible with the hardware and software used by the customer.

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4. API license

(1) Subject to the provider’s property and exploitation rights to intellectual property in accordance with section 10 of the General Terms and Conditions, the provider grants the customer a non-exclusive, non-transferable, non-sublicensable right that may be revoked at any time to use the API data and/or content provided via the respective API service using an assigned API key. (2) The customer may use the API Data and/or content solely for the following internal business purposes: internal archival, compliance, audit, and historical analysis. The customer may retain API Data already lawfully received and store internal copies of such data after receipt for the purposes mentioned. Any use of API Data or retained data for customer-facing, third-party-facing, or publicly accessible products, services, or outputs is strictly prohibited unless expressly permitted under a separate written license agreement with the provider. (3) It is prohibited for any customer, whether a sole proprietor or a legal entity, to create, maintain, or operate multiple accounts, directly or indirectly (including via affiliates, subsidiaries, employees, contractors, or other related persons), for the purpose of circumventing rate limits, quotas, pricing tiers, or any other usage restrictions instead of upgrading to a higher service package. (4) Any transfer, distribution, publication, sub-licensing, commercial exploitation or other use outside of the purpose of use agreed in accordance with section 4 (2) is prohibited. The customer is prohibited in particular from,

• feeding the API data or parts thereof into third-party databases or setting up an independent database for third-party-facing, customer-facing or public use;
• making the API Data, or any output derived from or combined with it, available to any third party, whether free of charge or for payment, including where the API Data is merged or processed together with other data and only the resulting output is shared;
• operating any third-party accessible dashboard, feed, report, score, interface, analytics, aggregation, transformation, or other output based on API Data, unless expressly permitted in an enterprise subscription and separate written license agreement with the provider;
• removing or modifying references to the origin, copyright or trademark notices.

(5) In the event of a breach of this provision, the provider shall be entitled to block access to the API service at any time with immediate effect and without prior notice. (6) If the customer wishes to use the API data and/or content over and above the usage purpose agreed contractually in accordance with section 4 (2) (in particular integration into external systems, commercial exploitation or use in relation to third parties), a separate written Enterprise agreement must be entered into with the provider beforehand. Any extended use shall be expressly prohibited until such an agreement has been entered into. Upon request, the provider may submit a corresponding offer to the customer for the extended scope of use. (7) If the customer is granted a license for transfer or for commercial exploitation of the API data and/or content by means of a separate written agreement in accordance with section 4 (6), then with every use, presentation or transfer of the API data it will be under an obligation to affix a clearly visible designation with the notice “Powered by beaconcha.in” and the logo provided by the provider in accordance with the branding guidelines. The provider shall be entitled to review compliance with these labelling requirements at any time. The provider may require the customer, under a separate written agreement, to ensure that its customers and other recipients of the API Data or any derived outputs are subject to equivalent contractual obligations and restrictions. (8) Any use of the API content that exceeds the license and usage rights expressly granted herein is prohibited. (9) The customer will retain its property rights to the data content that it makes available to the provider for use in connection with providing the API service. The customer will grant the provider in this regard a non-exclusive, non-transferable right to use the data content made available by the customer exclusively for the customer’s benefit for fulfilment of the provider’s obligations under these Terms and Conditions of License and Use.

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5. Unauthorised use

(1) The customer makes the following undertakings in connection with the use of the API service:

• not to use the API service in any way that violates applicable law, including but not limited to the intellectual property rights, unfair competition rights and personal rights of third parties;
• not to use the API service for unlawful, abusive or fraudulent purposes;
• to present its own identity truthfully and not to conceal the same;
• not to transfer the API keys to third parties or make them available to the public;
• to keep its access data and API keys secret;
• not to reproduce, replicate, modify or redesign API content, transfer it to third parties, make it available to the public or create derivative works from it, including by way of transformed, aggregated or otherwise derived outputs made accessible to third parties; not to use API content to operate competing or proxy API services;
• to refrain from having reverse engineering operations implemented, scraping data or attempting to circumvent rate limitations or authentication systems, free trial restrictions or any other technical or contractual usage controls imposed by the provider;
• not to implement any measures that could adversely affect the API service or infrastructure of Bitfly or other users.

(2) The customer will be under an obligation to notify the provider without delay of any suspicion that its access data, API keys and/or other confidential information in connection with the use of the API service could have become known to unauthorised third parties. (3) The provider shall be entitled to block access to the API service in the event of a breach of these Terms and Conditions of License and Use by the customer or third parties attributable to it. The access will only then be restored once the breach has been permanently remedied or the risk of recurrence has been eliminated through submission of a corresponding declaration to cease and desist.

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6. Payment terms

(1) Use of the API service is subscription-based. The prices applicable in each case for the service packages are available on the provider’s website at https://beaconcha.in/pricing. All prices are quoted in euros, plus statutory VAT, unless otherwise stated. (2) The provider uses the external payment service provider “Stripe” (Stripe, Inc., 354 Oyster Point Blvd, South San Francisco, CA 94080, USA) for billing of subscriptions. By using the services, the customer agrees that payment details will be processed in accordance with Stripe’s terms and conditions of use and privacy policy. The payment details entered will be processed directly by Stripe and not be stored by the provider. (3) Payments can only be made by credit card or via another payment method supported by Stripe. The provider will not be liable for failures or errors in the payment processing by Stripe unless these are attributable to gross negligence or wilful intent on the part of the provider. (4) Customers may change their requested service package at any time within their account:

• Upgrade: the difference is calculated immediately and the new plan will apply from the time of the change.
• Downgrade: a downgrade in the subscription will take effect from the start of the next billing period. If there is a credit balance remaining in the assigned Stripe account following the downgrade, this balance will automatically be offset against future charges until it has been consumed in its entirety. Any payments already made will not be reimbursed.

(5) The subscription will start as of the date that the customer selects the requested service package and billing period, and will renew automatically until it is cancelled. The subscription fee will be debited automatically from the credit card stored in the customer’s Stripe account in each case on the payment date shown in the customer’s Stripe account. (6) In the event that the contractual relationship is terminated by the customer (see section 9), there will be no pro rata refund of amounts already paid for the relevant service period. (7) Post-Licensing: The provider shall be entitled to verify whether the provided data is being used in accordance with these API Terms and Conditions of License and Use. If the customer uses the provided data, contrary to Section 4(2), for commercial purposes without a valid Enterprise Agreement (“External Use”), in particular for public display, commercial use or redistribution, the provider shall be entitled to charge post-licensing fees for such use in accordance with this Section. (8) The post-licensing fee shall correspond to the Enterprise fee applicable to the relevant type and scope of External Use during the relevant period of use. The relevant categories of commercial use are Public Display, Commercial Use and Redistribution. The applicable fee shall be no less than EUR 1,000 and no more than EUR 10,000 per month. The specific amount of the post-licensing fee shall be determined by the provider, acting reasonably and at its equitable discretion, based on the nature and scope of the customer’s External Use. (9) Notice Procedure: If the provider determines, on the basis of justified and objective indications, that unauthorized External Use has occurred, the provider shall notify the customer in writing at the email address stored in the customer’s account, stating the applicable post-licensing fee and any contractual penalty that may be charged. Within 30 days of receipt of the notice, the customer shall:

• (a) provide reasonable and verifiable evidence demonstrating that the use concerned does not violate these API Terms and Conditions of License and Use;
• (b) cease the External Use; or
• (c) enter into an Enterprise Agreement with the provider corresponding to the customer’s actual use.

(10) If the customer fails to respond within the 30-day period and continues the External Use after expiry of that period, the provider shall be entitled to charge the post-licensing fee pursuant to Section 6.8 and the contractual penalty pursuant to Section 6.14 and to collect the amounts invoiced using the payment method stored in the customer’s Stripe account. (11) The customer authorizes the provider to collect the determined post-licensing amount and any contractual penalty using the payment method stored in the customer’s Stripe payment profile. Such collection shall take place no earlier than two business days after expiry of the 30-day period. (12) If the customer demonstrably ceases the External Use within the 30-day period, the provider shall be entitled to charge the post-licensing fee up to and including the date on which the External Use ceased. In such case, the one-off contractual penalty pursuant to Section 6.14 shall not apply. (13) Continuing Effect: Following completion of the notice procedure, the applicable post-licensing fee shall automatically accrue for each additional billing month during which the customer continues the unauthorized External Use. No further notice or request by the provider shall be required. Further charges shall cease upon the earliest of the following:

• (a) cessation of the External Use;
• (b) evidence that the relevant use complies with the Agreement; or
• (c) conclusion of an Enterprise Agreement permitting the relevant use.

(14) If the customer continues the unauthorized External Use after expiry of the 30-day period provided for in Section 6.9 and has neither provided a substantively adequate response, demonstrated that the use has ceased, nor entered into a corresponding Enterprise Agreement, the provider shall be entitled to charge a one-off contractual penalty in the amount of EUR 1,000.00 net. (15) If the customer demonstrates, by means of reasonable and objectively verifiable evidence, that the use concerned was fully compliant with the Agreement during the relevant period, the provider shall immediately discontinue all measures taken in connection with the relevant compliance case and shall refund in full the post-licensing fees charged and any contractual penalty. The contractual penalty shall also be refunded if the customer demonstrates that it had ceased the External Use before expiry of the 30-day period provided for in Section 6.9. (16) The provider shall be entitled to suspend the customer’s access to the API Service if the customer continues the unauthorized External Use after expiry of the period provided for in Section 6.9, fails to enter into a corresponding Enterprise Agreement or fails to pay any amount due under this section. (17) The provider’s right to terminate ordinarily or for cause, as well as its right to assert claims for injunctive relief, damages, restitution, unjust enrichment and any other statutory or contractual remedies, shall remain unaffected.

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7. Exclusion of liability

(1) The provider does not warrant that the API service will be fully functional at all times and without interruptions. The provider therefore does not provide any warranties, guarantees and/or assurances of success of any kind whatsoever with regard to the API service, particularly with respect to the particular suitability of the API service and/or the API content for a specific purpose; the API content is provided to the customer “as is” without any express or implied warranty. The provider is in particular under no obligation to review the results (API data and/or content) from the use of the API service for legality, accuracy or completeness. (2) Furthermore, the provider assumes no responsibility for circumstances that are within the customer’s sphere of influence, particularly with respect to its hardware, software or internet connection. (3) In the event of a separate agreement regarding the availability of the API service (Service Level Agreement, “SLA”), the service levels guaranteed there with respect to guaranteed availability and response times will apply. If no such agreement is in place, the provider will assume no warranty for uninterrupted availability of the API service. Where a Service Level Agreement applies, any service credits granted thereunder shall, unless expressly stated otherwise, be the customer’s sole and exclusive remedy for failure to meet the agreed service levels.

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8. Compensation and limitation of liability

(1) Use of the API is at the customer’s own responsibility and at its own risk. The customer will be responsible exclusively for any damage resulting from the use of the API service, including any damage to the customer’s own IT system or loss of data. (2) The provider will be liable in accordance with the statutory provisions exclusively for damage caused intentionally or through gross negligence by the provider and its vicarious agents. The provider’s liability is excluded for damage that is not typical for this type of contract, for consequential damage, in particular lost profits and lost savings, and for pure financial losses, except in cases involving wilful intent on the part of the provider. The customer’s claims will expire within six months of becoming aware of the damage and of the party at fault.

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9. Duration of the API service

(1) The customer shall be entitled to cancel the subscription directly at any time via the Stripe customer portal. In this case, the subscription will end automatically at the end of the current billing period. Any payments already made for the current billing period will not be reimbursed. (2) If the customer downgrades to a cheaper tariff during a current billing period, a pro-rata credit note for the amount already paid will be issued to the assigned Stripe account (see section 6 (4)). (3) The provider will be entitled to suspend or block access to the API service for cause, particularly if the customer

• has provided false customer details or access to the API service has been obtained by other fraudulent means;
• has disclosed the access details to unauthorised persons and/or the API service is used in breach of the agreement;
• fails to comply with any other essential provision in these Terms and Conditions of License and Use for the purposes of section 5 and fails to comply with these despite being requested to remedy the breach of contract or defaulting situation within a grace period of seven calendar days;

(4) The contracting parties will be entitled to terminate the API service immediately if the API service is unavailable for more than 90 days due to force majeure. Any amounts already paid for services not rendered will not be reimbursed unless otherwise agreed. (5) Upon termination or expiry of the API Service, all rights granted to the customer to access, call, refresh, update, redistribute, use or otherwise exploit the API Data, whether under these API Terms and Conditions of License and Use or any separate Enterprise Agreement, shall immediately terminate, except to the extent that the relevant Enterprise Agreement expressly provides for such rights to survive termination or expiry. Historical API Data lawfully received by the customer before termination or expiry may be retained and used solely for internal archival, compliance, audit and historical analysis purposes, unless broader retention rights or post-termination use are expressly permitted under a separate written agreement.

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10. General provisions

(1) These API Terms and Conditions of License and Use shall take precedence over the provider’s General Terms and Conditions. Unless specified otherwise in these API Terms and Conditions of License and Use, the provider’s General Terms and Conditions shall apply. (2) We may update, change or replace these Terms at any time. We will notify you via email if we update, change or replace these Terms. You have a period of 14 days after notice has been provided to you to object to any update, change or replacement. If you do not object within this period, you shall be deemed having agreed to the update, change or replacement. We will remind you in our notice email that continuing to use our services after the objection period shall be deemed as expressing consent.

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