# Terms & Conditions *Last updated: April 2026* By connecting to and submitting transactions through our infrastructure, you ("Searcher") agree to the following terms. Violation of any of these terms may result in immediate suspension or permanent revocation of access without prior notice. *** ## 1. Permitted Activity Searchers are authorised to submit **backrun transactions only** via the `eth_sendBundle` RPC method through our auction system. A backrun is defined as a transaction that is sequenced immediately after a target transaction, where the Searcher's transaction does not adversely affect the execution outcome of the target transaction. ## 2. Prohibited Activity The following activities are strictly prohibited: **2.1 Frontrunning.** Submitting or attempting to submit transactions that are sequenced ahead of a target transaction in order to exploit its anticipated state changes. **2.2 Sandwich Attacks.** Submitting or attempting to submit a pair of transactions (or coordinated set of transactions) that bracket a target transaction to extract value at the expense of the target transaction's originator. **2.3 Direct Builder Submission.** Submitting bundles, transactions, or any order flow obtained through our infrastructure directly to block builders, relays, or any third-party block construction pipeline. All submissions must be routed exclusively through our designated endpoints. Blind-backrunning and bottom-of-block backrunning are not permitted on our flow. Base and Arbitrum are excluded from this restriction and searchers may submit their transactions to the sequencer on these chains. **2.4 Endpoint Abuse.** Excessive polling, flooding, or any behaviour that degrades the availability or performance of our RPC endpoints. Rate limits are enforced and must be respected. **2.5 Bundle Stuffing.** Submitting high volumes of low-quality, speculative, or duplicate bundles intended to gain probabilistic inclusion advantage rather than genuine MEV capture. **2.6 Collusion & Information Sharing.** Sharing or redistributing any proprietary data, transaction flow, or bundle contents obtained through our infrastructure with third parties, competing searchers, or any external entity. **2.7 Circumvention.** Attempting to reverse-engineer, bypass, or manipulate auction mechanics, scoring logic, allocation systems, or any protective measures we have in place. ## 3. Compliance & Conduct 3.1 Searchers must comply with all applicable laws and regulations in the jurisdictions in which they operate. 3.2 Searchers must not use our infrastructure to facilitate transactions involving sanctioned addresses, illicit funds, or any activity that violates applicable sanctions programmes (including but not limited to OFAC, EU, and UK sanctions lists). 3.3 Searchers are responsible for ensuring that their operations do not facilitate money laundering, terrorist financing, or other financial crimes. ## 4. Data & Confidentiality 4.1 Any transaction data, order flow, or operational information accessed through our infrastructure is confidential and proprietary. 4.2 Searchers must not log, store, or redistribute raw transaction data or mempool contents obtained through our systems beyond what is necessary for the immediate purpose of bundle construction and submission. ## 5. Availability & Liability 5.1 Our infrastructure is provided on an "as-is" basis. We do not guarantee uptime, latency, inclusion rates, or profitability. 5.2 We are not liable for losses arising from failed bundle inclusions, network outages, chain reorganisations, or any other operational disruptions. 5.3 We reserve the right to modify auction parameters, allocation logic, scoring weights, and supported chains at any time without prior notice. ## 6. Enforcement 6.1 We actively monitor bundle submissions and on-chain activity for compliance with these terms. 6.2 Violations may result in any or all of the following, at our sole discretion: throttling, temporary suspension, permanent revocation of access, or forfeiture of any pending or accrued payments. 6.3 Decisions regarding enforcement are final and are not subject to appeal. ## 7. Amendments We reserve the right to update these terms at any time. Continued use of our infrastructure following any update constitutes acceptance of the revised terms. Material changes will be communicated via our official Searcher Updates channel. *** *By submitting bundles through our endpoints, you acknowledge that you have read, understood, and agree to be bound by these terms.* --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.blinklabs.xyz/blink/ethereum/searchers/terms.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.