{"id":"7fcf44c1-f7ee-492c-8123-cddb3da724ed","shortId":"h3uhfp","kind":"x402","title":"Token price, market cap, volume, and supply metrics for any listed cryptocurrency via x402 micropayment.","tagline":"Token price, market cap, volume, and supply metrics for any listed cryptocurrency via x402 micropayment.","description":"The `/token-details` endpoint is part of Otto AI's x402 Agent Swarm, a suite of 30+ AI-powered services accessible via x402 V2 micropayments. This specific endpoint returns token price, market cap, volume, supply, and basic metrics for any listed cryptocurrency token. It accepts a `symbol` query parameter (e.g., BTC, ETH, SOL) and costs $0.10 per call, payable in USDC on Base, Polygon, or Solana.\n\nThe endpoint uses the x402 payment protocol: an initial GET request returns a 402 with a PAYMENT-REQUIRED header containing payment options (EIP-3009 USDC, Permit2 ERC-20, or Solana USDC). After signing and submitting payment via the PAYMENT-SIGNATURE header, the endpoint returns a 200 response with the data plus a signed EIP-712 receipt in the PAYMENT-RESPONSE header. For read-only endpoints like this one, a Sign-In-With-X (SIWX) header grants 1 hour of free repeat access after the initial payment.\n\nOtto AI's swarm is organized into three agent categories: Market Intelligence (including this endpoint), AI Creative Tools, and Trading Execution. The service exposes a full OpenAPI 3.1.0 spec and machine-readable discovery at `/.well-known/x402` and `/llm.txt`. Payment is supported via EVM wallets and Solana wallets, with Permit2 infrastructure available for custom ERC-20 tokens.","tags":[],"capabilities":["token-price-lookup","market-cap-data","volume-metrics","supply-data","x402-micropayment","usdc-payment","multi-chain-payment","siwx-repeat-access","eip-712-receipts","crypto-market-data"],"categories":["crypto","market-data","defi"],"synonyms":["token price API","crypto token metrics","coin market data","token market cap","cryptocurrency price lookup","token supply API","crypto fundamentals"],"warnings":["Response data schema is generic — actual fields in the 'data' object are not documented in the OpenAPI spec","Example response JSON is inferred from the endpoint description, not from an actual captured response","The x402 challenge object was captured but appears empty in the probe, which may indicate a probe limitation"],"endpointUrl":"https://x402.ottoai.services/token-details","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808","amount":"100000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300},{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2","assetTransferMethod":"permit2"},"payTo":"0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808","amount":"100000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300},{"asset":"0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359","extra":{},"payTo":"0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808","amount":"100000","scheme":"exact","network":"eip155:137","maxTimeoutSeconds":300},{"asset":"0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359","extra":{"assetTransferMethod":"permit2"},"payTo":"0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808","amount":"100000","scheme":"exact","network":"eip155:137","maxTimeoutSeconds":300},{"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","extra":{"feePayer":"BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"},"payTo":"6XcSfqJHr9vNW2vbiRaMqUYVm7shDgLepca54wUTDPN5","amount":"100000","scheme":"exact","network":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","maxTimeoutSeconds":300}]},"qualityScore":"0.750","qualityRationale":"Full OpenAPI 3.1.0 schema is available with clear parameter definitions and pricing. The endpoint is confirmed live (402 challenge captured). Response body schema is generic (just {status, data}) without detailed field definitions, and the example response is inferred from the endpoint description rather than captured 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'-3009':121 '-712':153 '/.well-known/x402':223 '/llm.txt':225 '/token-details':32 '0.10':86 '1':178 '200':144 '3.1.0':215 '30':46 '402':110 'accept':75 'access':51,183 'agent':41,196 'ai':38,48,189,203 'ai-pow':47 'avail':238 'base':93 'basic':67 'btc':81 'call':88 'cap':4,19,63 'categori':197 'coin market data' 'contain':117 'cost':85 'creativ':204 'crypto fundamentals' 'crypto token metrics' 'crypto-market-data' 'cryptocurr':12,27,72 'cryptocurrency price lookup' 'custom':240 'data':148 'discoveri':221 'e.g':80 'eip':120,152 'eip-712-receipts' 'endpoint':33,58,98,141,165,202 'erc':124,241 'eth':82 'evm':230 'execut':208 'expos':211 'free':181 'full':213 'get':106 'grant':177 'header':116,139,160,176 'hour':179 'includ':200 'infrastructur':237 'initi':105,186 'intellig':199 'like':166 'list':11,26,71 'machin':219 'machine-read':218 'market':3,18,62,198 'market-cap-data' 'metric':8,23,68 'micropay':15,30,55 'multi-chain-payment' 'one':168 'openapi':214 'option':119 'organ':193 'otto':37,188 'paramet':79 'part':35 'payabl':89 'payment':102,114,118,133,137,158,187,226 'payment-requir':113 'payment-respons':157 'payment-signatur':136 'per':87 'permit2':123,236 'plus':149 'polygon':94 'power':49 'price':2,17,61 'protocol':103 'queri':78 'read':163 'read-on':162 'readabl':220 'receipt':154 'repeat':182 'request':107 'requir':115 'respons':145,159 'return':59,108,142 'servic':50,210 'sign':130,151,171 'sign-in-with-x':170 'signatur':138 'siwx':175 'siwx-repeat-access' 'sol':83 'solana':96,127,233 'spec':216 'specif':57 'submit':132 'suit':44 'suppli':7,22,65 'supply-data' 'support':228 'swarm':42,191 'symbol':77 'three':195 'token':1,16,60,73,243 'token market cap' 'token price API' 'token supply API' 'token-price-lookup' 'tool':205 'trade':207 'usdc':91,122,128 'usdc-payment' 'use':99 'v2':54 'via':13,28,52,134,229 'volum':5,20,64 'volume-metrics' 'wallet':231,234 'x':174 'x402':14,29,40,53,101 'x402-micropayment'","prices":[{"id":"5f35e156-2c21-49a8-93ca-d046bcdbdb03","listingId":"7fcf44c1-f7ee-492c-8123-cddb3da724ed","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":null,"chain":"base","payTo":"0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808","amount":"100000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300},{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2","assetTransferMethod":"permit2"},"payTo":"0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808","amount":"100000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300},{"asset":"0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359","extra":{},"payTo":"0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808","amount":"100000","scheme":"exact","network":"eip155:137","maxTimeoutSeconds":300},{"asset":"0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359","extra":{"assetTransferMethod":"permit2"},"payTo":"0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808","amount":"100000","scheme":"exact","network":"eip155:137","maxTimeoutSeconds":300},{"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","extra":{"feePayer":"BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"},"payTo":"6XcSfqJHr9vNW2vbiRaMqUYVm7shDgLepca54wUTDPN5","amount":"100000","scheme":"exact","network":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:33.897Z"}],"sources":[{"listingId":"7fcf44c1-f7ee-492c-8123-cddb3da724ed","source":"x402_bazaar","sourceId":"https://x402.ottoai.services/token-details","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:33.897Z","lastSeenAt":"2026-04-22T04:02:49.134Z"}],"details":{"listingId":"7fcf44c1-f7ee-492c-8123-cddb3da724ed","quickStartSnippet":"# 1. GET the endpoint to receive the 402 payment challenge\ncurl https://x402.ottoai.services/token-details?symbol=ETH\n# Returns 402 with PAYMENT-REQUIRED header (base64-encoded)\n# 2. Decode header, sign USDC payment ($0.10), retry with PAYMENT-SIGNATURE header\n# 3. Receive 200 with token data + EIP-712 receipt in PAYMENT-RESPONSE header","exampleRequest":null,"exampleResponse":{"data":{"price":3450.12,"symbol":"ETH","marketCap":415000000000,"volume24h":18500000000,"totalSupply":120250000,"circulatingSupply":120250000},"status":"success"},"schema":null,"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Token-details endpoint costs $0.10 per call","source_url":"https://x402.ottoai.services"},{"claim":"Returns token price, market cap, volume, supply, and basic metrics","source_url":"https://x402.ottoai.services"},{"claim":"Payment accepted in USDC on Base, Polygon, or Solana","source_url":"https://x402.ottoai.services"},{"claim":"SIWX provides 1 hour free repeat access after initial payment for data endpoints","source_url":"https://x402.ottoai.services"},{"claim":"Every call returns a signed EIP-712 receipt as proof of service delivery","source_url":"https://x402.ottoai.services"},{"claim":"OpenAPI version 3.1.0 with 30+ endpoints across 3 agent categories","source_url":"https://x402.ottoai.services"}],"useCases":["Agent-driven portfolio analysis that needs current token prices and market caps","Automated trading bots requiring real-time token metrics before executing trades","Dashboard or alerting systems that aggregate crypto market fundamentals","Research workflows comparing token volume, supply, and market cap across assets","DeFi applications needing on-demand token pricing data without API key management"],"bestFor":["AI agents needing pay-per-call crypto token data without subscriptions","Developers building x402-compatible crypto market tools","Automated workflows requiring token fundamentals with cryptographic proof of delivery"],"notFor":["High-frequency trading requiring sub-second latency (per-call payment overhead)","Users who need free or subscription-based bulk historical price data","Non-crypto use cases with no USDC wallet available"],"kindDetails":{},"updatedAt":"2026-04-22T01:02:22.419Z"}}