{"id":"f64f9e93-ae7f-4a03-867a-3c3b37684296","shortId":"J5FAS5","kind":"x402","title":"Query token supply data on Base via x402-paid crypto intelligence endpoint.","tagline":"Query token supply data on Base via x402-paid crypto intelligence endpoint.","description":"This endpoint, hosted by Erudite Intelligence LLC on their EruditePay Bridge infrastructure, returns token supply data for tokens on the Base network. It accepts a POST request with a JSON body containing a token address (or symbol) and returns supply information. The endpoint is gated by the x402 payment protocol (v2), requiring per-call payment of 0.01 USDC on Base (eip155:8453) or 0.01 USDT on Tron before the response is served.\n\nThe x402 challenge confirms the endpoint is live and describes itself as \"Crypto data intelligence.\" The Bazaar schema extension specifies the input format: a JSON body with a `token` field (string, representing a token address or symbol). The output is a JSON object with `success` (boolean) and `data` (object), though the example output's `data` field is empty, so the exact shape of the returned supply data is not documented.\n\nThe provider (EruditePay) is primarily an x402 payment facilitator supporting 20 blockchains, registered as a FinCEN MSB. This particular endpoint appears to be a data intelligence service built on top of that infrastructure rather than the facilitator itself. Documentation at docs.eruditepay.com was referenced on the landing page but the /docs path on the bridge returns a 404, and no OpenAPI spec is available, leaving the response schema largely undocumented.","tags":[],"capabilities":["token-supply-query","base-network","x402-payment","usdc-payment","usdt-payment","tron-payment","crypto-data-intelligence","json-api"],"categories":["crypto","data"],"synonyms":["token supply","ERC-20 supply","Base token info","crypto token data","on-chain supply","total supply","circulating supply","token metadata","EruditePay"],"warnings":["Output schema is undocumented — the example response contains an empty data object","docs.eruditepay.com referenced on landing page but /docs on bridge returns 404","No OpenAPI or detailed API documentation available for this specific endpoint","Response shape for token supply data is unknown — callers must discover it empirically"],"endpointUrl":"https://bridge.eruditepay.com/v1/base/token/supply","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x6961b88476a9b89C4ed97A4aF4D190754d5e70A1","amount":"3000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300}]},"qualityScore":"0.450","qualityRationale":"The endpoint is live (402 challenge captured) with a clear payment scheme and basic input schema from the Bazaar extension. However, the output schema is essentially empty (example data is {}), there is no OpenAPI spec, and the dedicated docs page returns 404. The actual response structure for supply data must be 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'0.01':84,91 '20':180 '404':226 '8453':89 'Base token info' 'ERC-20 supply' 'EruditePay' 'accept':50 'address':61,134 'appear':190 'avail':232 'base':6,19,47,87 'base-network' 'bazaar':116 'blockchain':181 'bodi':57,125 'boolean':145 'bridg':37,223 'built':197 'call':81 'challeng':102 'circulating supply' 'confirm':103 'contain':58 'crypto':11,24,112 'crypto token data' 'crypto-data-intelligence' 'data':4,17,42,113,147,154,166,194 'describ':109 'docs.eruditepay.com':210 'document':169,208 'eip155':88 'empti':157 'endpoint':13,26,28,69,105,189 'erudit':31 'eruditepay':36,172 'exact':160 'exampl':151 'extens':118 'facilit':178,206 'field':129,155 'fincen':185 'format':122 'gate':71 'host':29 'inform':67 'infrastructur':38,202 'input':121 'intellig':12,25,32,114,195 'json':56,124,141 'json-api' 'land':215 'larg':237 'leav':233 'live':107 'llc':33 'msb':186 'network':48 'object':142,148 'on-chain supply' 'openapi':229 'output':138,152 'page':216 'paid':10,23 'particular':188 'path':220 'payment':75,82,177 'per':80 'per-cal':79 'post':52 'primarili':174 'protocol':76 'provid':171 'queri':1,14 'rather':203 'referenc':212 'regist':182 'repres':131 'request':53 'requir':78 'respons':97,235 'return':39,65,164,224 'schema':117,236 'serv':99 'servic':196 'shape':161 'spec':230 'specifi':119 'string':130 'success':144 'suppli':3,16,41,66,165 'support':179 'symbol':63,136 'though':149 'token':2,15,40,44,60,128,133 'token metadata' 'token supply' 'token-supply-query' 'top':199 'total supply' 'tron':94 'tron-payment' 'undocu':238 'usdc':85 'usdc-payment' 'usdt':92 'usdt-payment' 'v2':77 'via':7,20 'x402':9,22,74,101,176 'x402-paid':8,21 'x402-payment'","prices":[{"id":"a99cabe7-436f-4228-ae69-1a9676fcaac6","listingId":"f64f9e93-ae7f-4a03-867a-3c3b37684296","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":"3000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:36.731Z"}],"sources":[{"listingId":"f64f9e93-ae7f-4a03-867a-3c3b37684296","source":"x402_bazaar","sourceId":"https://bridge.eruditepay.com/v1/base/token/supply","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:36.731Z","lastSeenAt":"2026-04-22T08:32:31.513Z"}],"details":{"listingId":"f64f9e93-ae7f-4a03-867a-3c3b37684296","quickStartSnippet":"curl -X POST https://bridge.eruditepay.com/v1/base/token/supply \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_header>\" \\\n  -d '{\"token\": \"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\"}'","exampleRequest":{"token":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"},"exampleResponse":{"data":{},"success":true},"schema":null,"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns x402 v2 challenge with 0.01 USDC on Base or 0.01 USDT on Tron pricing","source_url":"https://bridge.eruditepay.com/v1/base/token/supply"},{"claim":"Provider is Erudite Intelligence LLC, FinCEN MSB registered (BSA ID 31000324258137)","source_url":"https://bridge.eruditepay.com"},{"claim":"Endpoint self-describes as 'Crypto data intelligence'","source_url":"https://bridge.eruditepay.com/v1/base/token/supply"},{"claim":"Input schema requires a JSON body with a 'token' field (token address or symbol)","source_url":"https://bridge.eruditepay.com/v1/base/token/supply"},{"claim":"EruditePay Bridge supports 20 blockchains as an x402 facilitator","source_url":"https://bridge.eruditepay.com"}],"useCases":["Querying total or circulating supply of a token on Base for portfolio dashboards","Automated agents checking token supply before executing trades","DeFi protocols verifying token supply as part of risk assessment","Data aggregators collecting supply metrics across tokens"],"bestFor":["Agents needing on-demand token supply data with crypto-native payment","Programmatic access to Base network token supply without API keys","x402-compatible clients that can pay per-call in USDC or USDT"],"notFor":["Bulk historical supply data retrieval (no batch or time-series documented)","Free or subscription-based access — every call requires a micropayment","Non-Base-network token supply queries (endpoint path specifies Base)"],"kindDetails":{},"updatedAt":"2026-04-22T01:51:10.577Z"}}