{"id":"c12aede9-9dd8-4072-812d-5efe60362391","shortId":"KAYLYv","kind":"x402","title":"Retrieve top-losing crypto tokens via x402-paid API on Base and Tron","tagline":"Retrieve top-losing crypto tokens via x402-paid API on Base and Tron","description":"This endpoint from Erudite Intelligence LLC returns data about the top-losing cryptocurrency tokens. It is part of a \"Crypto data intelligence\" service accessible via the x402 payment protocol. Callers POST a JSON body containing a token address (or use the zero address as a wildcard) and receive a JSON response with loss/performance data.\n\nThe endpoint accepts payment on two networks: Base (EIP-155:8453) using USDC at 0.01 USDC per call, and Tron using USDT at 0.01 USDT per call. Payment is facilitated through the EruditePay x402 Bridge, which supports the x402 v2 specification. The facilitator for Base payments is Coinbase CDP.\n\nDocumentation is sparse — the crawled docs URL returns a 404, and the only schema information comes from the x402 challenge's embedded Bazaar extension. The example output is a generic `{\"success\": true, \"data\": {}}` stub, so the exact shape of the returned market data (fields, sorting, pagination) is unknown. The endpoint is live and returning a well-formed 402 challenge, confirming it is operational.","tags":[],"capabilities":["crypto-market-data","top-losers","x402-payment","base-network","tron-network","usdc-payment","usdt-payment","json-api"],"categories":["crypto","market-data"],"synonyms":["crypto losers","worst performing tokens","token price drop","market decliners","crypto market movers","top losing coins","token performance"],"warnings":["Documentation URL (https://docs.eruditepay.com/) was not crawled and the /docs path on the bridge returns 404","The example output in the Bazaar schema is a stub ({\"data\": {}}) — actual response shape is unknown","No OpenAPI spec available; input/output contracts are inferred from the x402 challenge only","The 'token' input field's role is unclear — it may filter results or act as a wildcard when set to the zero address"],"endpointUrl":"https://bridge.eruditepay.com/v1/base/market/top-losers","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x6961b88476a9b89C4ed97A4aF4D190754d5e70A1","amount":"1000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300}]},"qualityScore":"0.400","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.01 per call), but documentation is effectively absent — the docs URL 404s, the output example is a stub with an empty data object, and there is no description of the response fields, pagination, or filtering 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'0.01':100,109 '402':193 '404':144 '8453':96 'accept':88 'access':55 'address':69,74 'api':11,26 'base':13,28,93,130 'base-network' 'bazaar':157 'bodi':65 'bridg':120 'call':103,112 'caller':61 'cdp':134 'challeng':154,194 'coinbas':133 'come':150 'confirm':195 'contain':66 'crawl':139 'crypto':5,20,51 'crypto losers' 'crypto market movers' 'crypto-market-data' 'cryptocurr':44 'data':38,52,85,167,177 'doc':140 'document':135 'eip':94 'embed':156 'endpoint':32,87,184 'erudit':34 'eruditepay':118 'exact':171 'exampl':160 'extens':158 'facilit':115,128 'field':178 'form':192 'generic':164 'inform':149 'intellig':35,53 'json':64,81 'json-api' 'live':186 'llc':36 'lose':4,19,43 'loss/performance':84 'market':176 'market decliners' 'network':92 'oper':198 'output':161 'pagin':180 'paid':10,25 'part':48 'payment':59,89,113,131 'per':102,111 'post':62 'protocol':60 'receiv':79 'respons':82 'retriev':1,16 'return':37,142,175,188 'schema':148 'servic':54 'shape':172 'sort':179 'spars':137 'specif':126 'stub':168 'success':165 'support':122 'token':6,21,45,68 'token performance' 'token price drop' 'top':3,18,42 'top losing coins' 'top-los':2,17,41 'top-losers' 'tron':15,30,105 'tron-network' 'true':166 'two':91 'unknown':182 'url':141 'usdc':98,101 'usdc-payment' 'usdt':107,110 'usdt-payment' 'use':71,97,106 'v2':125 'via':7,22,56 'well':191 'well-form':190 'wildcard':77 'worst performing tokens' 'x402':9,24,58,119,124,153 'x402-paid':8,23 'x402-payment' 'zero':73","prices":[{"id":"9093859d-2e39-4be6-9355-8a80f0ac66c5","listingId":"c12aede9-9dd8-4072-812d-5efe60362391","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":null,"chain":"base","payTo":"0x6961b88476a9b89C4ed97A4aF4D190754d5e70A1","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x6961b88476a9b89C4ed97A4aF4D190754d5e70A1","amount":"1000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:35.840Z"}],"sources":[{"listingId":"c12aede9-9dd8-4072-812d-5efe60362391","source":"x402_bazaar","sourceId":"https://bridge.eruditepay.com/v1/base/market/top-losers","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:35.840Z","lastSeenAt":"2026-04-22T05:32:27.831Z"}],"details":{"listingId":"c12aede9-9dd8-4072-812d-5efe60362391","quickStartSnippet":"curl -X POST https://bridge.eruditepay.com/v1/base/market/top-losers \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -d '{\"token\": \"0x0000000000000000000000000000000000000000\"}'","exampleRequest":{"token":"0x0000000000000000000000000000000000000000"},"exampleResponse":{"data":{},"success":true},"schema":null,"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns x402 v2 challenge with 402 status, confirming it is live","source_url":"https://bridge.eruditepay.com/v1/base/market/top-losers"},{"claim":"Price is 10000 base units of USDC (6 decimals) = $0.01 per call on Base","source_url":"https://bridge.eruditepay.com/v1/base/market/top-losers"},{"claim":"Also accepts 10000 base units of USDT on Tron = $0.01 per call","source_url":"https://bridge.eruditepay.com/v1/base/market/top-losers"},{"claim":"Provider is Erudite Intelligence LLC, FinCEN MSB registered","source_url":"https://bridge.eruditepay.com"},{"claim":"EruditePay Bridge supports 20 blockchains and x402 v2.0 protocol","source_url":"https://bridge.eruditepay.com"}],"useCases":["Identify the worst-performing tokens in real time for trading signals","Feed top-loser data into an automated portfolio rebalancing agent","Display a market movers widget showing biggest decliners","Screen for tokens experiencing sharp sell-offs for research or alerts"],"bestFor":["Agents or bots that need on-demand crypto market loser data","Developers building crypto dashboards with pay-per-call pricing","Automated trading systems that react to large price drops"],"notFor":["Historical backtesting requiring bulk data downloads","Users who need free or subscription-based market data","Non-crypto financial data needs"],"kindDetails":{},"updatedAt":"2026-04-22T01:41:51.726Z"}}