{"id":"f393bd69-3ace-4311-9265-8e0a02a68e3e","shortId":"RvRR7k","kind":"x402","title":"Detect MEV activity including sandwich attacks, front-running, and toxic flow on-chain via Bitquery data.","tagline":"Detect MEV activity including sandwich attacks, front-running, and toxic flow on-chain via Bitquery data.","description":"This x402 endpoint from Agent Einstein (emc2ai.io) is designed to detect Maximal Extractable Value (MEV) activity on blockchain networks. It targets sandwich attacks, front-running, and toxic order flow analysis using Bitquery as the underlying data source. The endpoint path suggests it returns raw MEV detection data, likely in JSON format suitable for programmatic consumption by agents or analytics pipelines.\n\nAgent Einstein is a broader AI agent platform that supports multiple protocols (x402, A2A, MCP) and accepts payments in USDC on Base, USDC on Solana, and BTC via Lightning Network. The platform's documentation indicates paid features typically cost $0.20–$1.00 per invocation, though the specific pricing for this MEV detection endpoint could not be confirmed because the endpoint returned HTTP 502 during probing rather than the expected 402 payment challenge.\n\nImportantly, at the time of probing, both the endpoint and the origin server returned 502 errors (Cloudflare reported a host connection timeout on the /api path as well). This means the endpoint is currently unreachable — the origin server appears to be down or unresponsive behind Cloudflare. No OpenAPI schema, request/response examples, or detailed documentation specific to this MEV detection endpoint were found in the crawled material.","tags":[],"capabilities":["mev-detection","sandwich-attack-detection","front-running-analysis","toxic-flow-analysis","bitquery-integration","blockchain-analytics","x402-payment"],"categories":["blockchain","security","analytics"],"synonyms":["MEV detector","sandwich attack scanner","front-running detection","toxic flow analyzer","blockchain MEV analysis","DeFi MEV monitoring","Bitquery MEV","extractable value detection"],"warnings":["Endpoint returned HTTP 502 on both POST and GET — origin server appears down (Cloudflare 522 timeout observed on /api path)","No x402 payment challenge was returned, so pricing and payment details for this specific endpoint are unconfirmed","No OpenAPI schema or endpoint-specific documentation available","No request/response format documentation found — request example in quick_start_snippet is speculative","The origin host may be experiencing extended downtime; verify before relying on this endpoint"],"endpointUrl":"https://emc2ai.io/x402/bitquery/mevdetection/raw","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0xc9368b30BD620164FD1a05a5d99dcaf8Ae754775","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://emc2ai.io/x402/bitquery/mevdetection/raw","description":"Detect MEV activity: sandwich attacks, front-running, toxic flow analysis.","discoverable":true,"outputSchema":{"input":{"type":"http","method":"POST","bodyType":"json","bodyFields":{"chain":{"enum":["base","ethereum","bsc","arbitrum","polygon","optimism","solana"],"type":"string","description":"Blockchain to query (e.g., base, ethereum, bsc, solana)"},"limit":{"type":"string","description":"Maximum number of results to return (default: 10, max: 500)"},"timeperiod":{"enum":["1h","4h","24h","7d","30d"],"type":"string","description":"Time period for analysis (e.g., 1h, 24h, 7d, 30d)"}},"discoverable":true},"output":{"result":{"type":"object","description":"Query result data"},"status":{"type":"string","description":"Request status (completed or error)"},"payment":{"type":"object","description":"Payment receipt information"}}},"maxAmountRequired":"1000000","maxTimeoutSeconds":90}]},"qualityScore":"0.150","qualityRationale":"The endpoint returned 502 on both GET and POST, and the origin server is also returning 502/522 errors via Cloudflare, indicating the host is currently down. No OpenAPI schema, no request/response examples, and no endpoint-specific documentation were found. The listing is essentially a stub based on the endpoint path and general platform 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'0.20':137 '1.00':138 '402':166 '502':159,183 'Bitquery MEV' 'DeFi MEV monitoring' 'MEV detector' 'a2a':111 'accept':114 'activ':3,21,52 'agent':41,94,98,104 'ai':103 'analysi':67 'analyt':96 'appear':207 'attack':6,24,59 'base':119 'behind':213 'bitqueri':17,35,69 'bitquery-integration' 'blockchain':54 'blockchain MEV analysis' 'blockchain-analytics' 'broader':102 'btc':124 'chain':15,33 'challeng':168 'cloudflar':185,214 'confirm':153 'connect':189 'consumpt':92 'cost':136 'could':150 'crawl':233 'current':202 'data':18,36,73,84 'design':45 'detail':221 'detect':1,19,47,83,148,227 'document':131,222 'einstein':42,99 'emc2ai.io':43 'endpoint':39,76,149,156,177,200,228 'error':184 'exampl':219 'expect':165 'extract':49 'extractable value detection' 'featur':134 'flow':12,30,66 'format':88 'found':230 'front':8,26,61 'front-run':7,25,60 'front-running detection' 'front-running-analysis' 'host':188 'http':158 'import':169 'includ':4,22 'indic':132 'invoc':140 'json':87 'lightn':126 'like':85 'materi':234 'maxim':48 'mcp':112 'mean':198 'mev':2,20,51,82,147,226 'mev-detection' 'multipl':108 'network':55,127 'on-chain':13,31 'openapi':216 'order':65 'origin':180,205 'paid':133 'path':77,194 'payment':115,167 'per':139 'pipelin':97 'platform':105,129 'price':144 'probe':161,174 'programmat':91 'protocol':109 'rather':162 'raw':81 'report':186 'request/response':218 'return':80,157,182 'run':9,27,62 'sandwich':5,23,58 'sandwich attack scanner' 'sandwich-attack-detection' 'schema':217 'server':181,206 'solana':122 'sourc':74 'specif':143,223 'suggest':78 'suitabl':89 'support':107 'target':57 'though':141 'time':172 'timeout':190 'toxic':11,29,64 'toxic flow analyzer' 'toxic-flow-analysis' 'typic':135 'under':72 'unreach':203 'unrespons':212 'usdc':117,120 'use':68 'valu':50 'via':16,34,125 'well':196 'x402':38,110 'x402-payment'","prices":[{"id":"ee0221ee-f8bd-43e8-b6a8-2ce7e2132cf7","listingId":"f393bd69-3ace-4311-9265-8e0a02a68e3e","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"1000000","chain":"base","payTo":"0xc9368b30BD620164FD1a05a5d99dcaf8Ae754775","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0xc9368b30BD620164FD1a05a5d99dcaf8Ae754775","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://emc2ai.io/x402/bitquery/mevdetection/raw","description":"Detect MEV activity: sandwich attacks, front-running, toxic flow analysis.","discoverable":true,"outputSchema":{"input":{"type":"http","method":"POST","bodyType":"json","bodyFields":{"chain":{"enum":["base","ethereum","bsc","arbitrum","polygon","optimism","solana"],"type":"string","description":"Blockchain to query (e.g., base, ethereum, bsc, solana)"},"limit":{"type":"string","description":"Maximum number of results to return (default: 10, max: 500)"},"timeperiod":{"enum":["1h","4h","24h","7d","30d"],"type":"string","description":"Time period for analysis (e.g., 1h, 24h, 7d, 30d)"}},"discoverable":true},"output":{"result":{"type":"object","description":"Query result data"},"status":{"type":"string","description":"Request status (completed or error)"},"payment":{"type":"object","description":"Payment receipt information"}}},"maxAmountRequired":"1000000","maxTimeoutSeconds":90}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":90},"createdAt":"2026-04-21T18:32:31.195Z"}],"sources":[{"listingId":"f393bd69-3ace-4311-9265-8e0a02a68e3e","source":"x402_bazaar","sourceId":"https://emc2ai.io/x402/bitquery/mevdetection/raw","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:31.195Z","lastSeenAt":"2026-04-22T04:02:45.606Z"}],"details":{"listingId":"f393bd69-3ace-4311-9265-8e0a02a68e3e","quickStartSnippet":"# Endpoint returned 502 at probe time — example is speculative\ncurl -X POST https://emc2ai.io/x402/bitquery/mevdetection/raw \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"chain\": \"ethereum\", \"block_range\": [20000000, 20000100]}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"POST","bodyType":"json","bodyFields":{"chain":{"enum":["base","ethereum","bsc","arbitrum","polygon","optimism","solana"],"type":"string","description":"Blockchain to query (e.g., base, ethereum, bsc, solana)"},"limit":{"type":"string","description":"Maximum number of results to return (default: 10, max: 500)"},"timeperiod":{"enum":["1h","4h","24h","7d","30d"],"type":"string","description":"Time period for analysis (e.g., 1h, 24h, 7d, 30d)"}},"discoverable":true},"output":{"result":{"type":"object","description":"Query result data"},"status":{"type":"string","description":"Request status (completed or error)"},"payment":{"type":"object","description":"Payment receipt information"}}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Agent Einstein supports x402, A2A, and MCP protocols and accepts USDC on Base, USDC on Solana, and BTC via Lightning Network","source_url":"https://emc2ai.io/docs"},{"claim":"Paid features typically cost $0.20–$1.00 per invocation","source_url":"https://emc2ai.io/docs"},{"claim":"The /api path returned a Cloudflare 522 error indicating host connection timeout","source_url":"https://emc2ai.io/api"},{"claim":"Einstein queries CDP Bazaar for x402-enabled service discovery","source_url":"https://emc2ai.io/docs"}],"useCases":["Detecting sandwich attacks targeting your DeFi transactions","Analyzing front-running activity on specific token pairs or DEXs","Identifying toxic order flow patterns in on-chain trading","Monitoring MEV bot activity for research or compliance purposes","Integrating MEV risk signals into automated trading strategies"],"bestFor":["DeFi traders wanting to understand MEV exposure on their transactions","Blockchain security researchers analyzing MEV patterns","AI agents that need programmatic MEV detection as part of a larger workflow"],"notFor":["Real-time MEV protection or transaction shielding (this is detection/analysis, not prevention)","Users needing guaranteed uptime — the endpoint was down at probe time","Non-blockchain analytics use cases"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:53.16Z"},"updatedAt":"2026-04-22T04:02:45.606Z"}}