{"id":"5c37578f-b37d-4f06-b820-b8b89c45547a","shortId":"PQp2bt","kind":"x402","title":"Top 3 trending altcoins based on AI-analyzed news and Twitter sentiment, paid via x402 USDC micropayment.","tagline":"Top 3 trending altcoins based on AI-analyzed news and Twitter sentiment, paid via x402 USDC micropayment.","description":"The `/trending-altcoins` endpoint is part of Otto AI's x402 Agent Swarm, a suite of 30+ AI-powered crypto market intelligence, creative tools, and DeFi trading endpoints accessible via x402 V2 micropayments. This specific endpoint returns the top 3 hottest altcoins that traders may want to investigate, derived from real-time analysis of crypto news and Twitter activity. It costs $0.10 per call, payable in USDC on Base, Polygon, or Solana.\n\nThe endpoint is a simple GET request with no required parameters. It returns a JSON object with a `status` field and a `data` object containing the trending altcoin results. Payment follows the x402 V2 flow: an initial unauthenticated request receives a 402 response with a `PAYMENT-REQUIRED` header containing base64-encoded payment options (EIP-3009 USDC, Permit2 ERC-20, or Solana USDC). The caller signs the payment and retries with a `PAYMENT-SIGNATURE` header. On success, a signed EIP-712 receipt is returned in the `PAYMENT-RESPONSE` header. As a read-only data endpoint, it also supports Sign-In-With-X (SIWX) for 1-hour free repeat access after the first paid call.\n\nOtto AI also offers an on-chain reputation system via ERC-8004 and provides machine-readable specs at `/.well-known/x402` and `/llm.txt`. The broader platform includes market intelligence (news, sentiment, token analysis, derivatives, DeFi analytics, TradFi macro), AI creative tools (image/video generation, research, transaction explainer), and trading execution (swaps via Odos, bridges via LiFi, Hyperliquid perps, yield farming).","tags":[],"capabilities":["trending-altcoins","crypto-market-intelligence","twitter-sentiment-analysis","news-analysis","x402-micropayment","usdc-payment","multi-chain-payment","siwx-repeat-access","eip-712-receipts","permit2-ready"],"categories":["crypto","market-intelligence","defi"],"synonyms":["trending crypto","hot altcoins","altcoin trends","crypto trending tokens","altcoin sentiment","crypto alpha","trending coins","market movers"],"warnings":["Response data schema is untyped — the OpenAPI spec only defines `data` as a generic object without specifying the structure of trending altcoin results","The example_response_json is inferred/illustrative, not sourced from actual API output","This endpoint provides AI-generated trading signals — not financial advice; use at your own risk"],"endpointUrl":"https://x402.ottoai.services/trending-altcoins","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":"0.720","qualityRationale":"Full OpenAPI schema is available with clear endpoint description, pricing, and payment flow documentation. The endpoint returned a live 402 challenge confirming it is operational. However, the response data schema is generic (untyped `data` object), and no real example response is provided — the example_response_json above is inferred from the endpoint description and should be treated as 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'-3009':166 '-712':192 '-8004':241 '/.well-known/x402':249 '/llm.txt':251 '/trending-altcoins':38 '0.10':99 '1':219 '3':2,20,76 '30':52 '402':151 'access':65,223 'activ':96 'agent':47 'ai':8,26,44,54,230,267 'ai-analyz':7,25 'ai-pow':53 'also':210,231 'altcoin':4,22,78,137 'altcoin sentiment' 'altcoin trends' 'analysi':90,261 'analyt':264 'analyz':9,27 'base':5,23,106 'base64':161 'base64-encoded':160 'bridg':281 'broader':253 'call':101,228 'caller':175 'chain':236 'contain':134,159 'cost':98 'creativ':59,268 'crypto':56,92 'crypto alpha' 'crypto trending tokens' 'crypto-market-intelligence' 'data':132,207 'defi':62,263 'deriv':85,262 'eip':165,191 'eip-712-receipts' 'encod':162 'endpoint':39,64,72,111,208 'erc':169,240 'execut':277 'explain':274 'farm':287 'field':129 'first':226 'flow':144 'follow':140 'free':221 'generat':271 'get':115 'header':158,186,201 'hot altcoins' 'hottest':77 'hour':220 'hyperliquid':284 'image/video':270 'includ':255 'initi':146 'intellig':58,257 'investig':84 'json':124 'lifi':283 'machin':245 'machine-read':244 'macro':266 'market':57,256 'market movers' 'may':81 'micropay':18,36,69 'multi-chain-payment' 'news':10,28,93,258 'news-analysis' 'object':125,133 'odo':280 'offer':232 'on-chain':234 'option':164 'otto':43,229 'paid':14,32,227 'paramet':120 'part':41 'payabl':102 'payment':139,156,163,178,184,199 'payment-requir':155 'payment-respons':198 'payment-signatur':183 'per':100 'permit2':168 'permit2-ready' 'perp':285 'platform':254 'polygon':107 'power':55 'provid':243 'read':205 'read-on':204 'readabl':246 'real':88 'real-tim':87 'receipt':193 'receiv':149 'repeat':222 'reput':237 'request':116,148 'requir':119,157 'research':272 'respons':152,200 'result':138 'retri':180 'return':73,122,195 'sentiment':13,31,259 'sign':176,190,213 'sign-in-with-x':212 'signatur':185 'simpl':114 'siwx':217 'siwx-repeat-access' 'solana':109,172 'spec':247 'specif':71 'status':128 'success':188 'suit':50 'support':211 'swap':278 'swarm':48 'system':238 'time':89 'token':260 'tool':60,269 'top':1,19,75 'trade':63,276 'trader':80 'tradfi':265 'transact':273 'trend':3,21,136 'trending coins' 'trending crypto' 'trending-altcoins' 'twitter':12,30,95 'twitter-sentiment-analysis' 'unauthent':147 'usdc':17,35,104,167,173 'usdc-payment' 'v2':68,143 'via':15,33,66,239,279,282 'want':82 'x':216 'x402':16,34,46,67,142 'x402-micropayment' 'yield':286","prices":[{"id":"687b7e54-1552-47f2-85ed-b61f3506df1b","listingId":"5c37578f-b37d-4f06-b820-b8b89c45547a","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 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1. Send GET to receive 402 challenge\ncurl https://x402.ottoai.services/trending-altcoins\n# 2. Decode PAYMENT-REQUIRED header, sign USDC payment\n# 3. Retry with PAYMENT-SIGNATURE header\ncurl -H \"PAYMENT-SIGNATURE: <signed_payment>\" \\\n  https://x402.ottoai.services/trending-altcoins","exampleRequest":null,"exampleResponse":{"data":{"trending":[{"reason":"Surging Twitter mentions and positive KOL sentiment","symbol":"PEPE"},{"reason":"Major protocol upgrade announcement driving news coverage","symbol":"ARB"},{"reason":"RWA narrative gaining momentum across crypto Twitter","symbol":"ONDO"}]},"status":"success"},"schema":null,"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns top 3 hottest altcoins based on news and Twitter analysis, priced at $0.10","source_url":"https://x402.ottoai.services"},{"claim":"Payment accepted in USDC on Base, Polygon, and Solana via x402 V2 protocol","source_url":"https://x402.ottoai.services"},{"claim":"Read-only endpoints support SIWX for 1-hour free repeat access after first payment","source_url":"https://x402.ottoai.services"},{"claim":"Every call returns a signed EIP-712 receipt as verifiable proof of service delivery","source_url":"https://x402.ottoai.services"},{"claim":"OpenAPI spec version 2.0.0 describes 30+ endpoints across Market Intelligence, AI Creative Tools, and Trading categories","source_url":"https://x402.ottoai.services"}],"useCases":["AI trading agents discovering which altcoins have the most buzz before making allocation decisions","Portfolio dashboards surfacing trending tokens to users in real time","Automated research pipelines that feed trending altcoin data into deeper analysis workflows","Telegram/Discord bots providing daily trending altcoin alerts to community members","Quantitative strategies incorporating social sentiment signals for altcoin momentum"],"bestFor":["AI agents needing programmatic access to trending altcoin signals via micropayment","Crypto traders wanting a quick pulse on which altcoins are gaining traction","Developers building automated market intelligence pipelines"],"notFor":["Users needing historical trending data or backtesting (endpoint returns current snapshot only)","Non-crypto use cases or traditional equity/commodity trend analysis","Users without USDC on Base, Polygon, or Solana for payment"],"kindDetails":{},"updatedAt":"2026-04-22T00:49:39.722Z"}}