{"id":"306ed91c-1cf5-402e-b2c1-34e99a5a7217","shortId":"YZXpTm","kind":"x402","title":"Crypto market sentiment analysis via x402 micropayment on Base, $0.02 per call.","tagline":"Crypto market sentiment analysis via x402 micropayment on Base, $0.02 per call.","description":"The `/api/market-mood` endpoint on httpay.xyz returns a current crypto market sentiment analysis as JSON. It is part of a larger marketplace of 307+ pay-per-call API endpoints that accept x402 micropayments in USDC on Base (chain ID 8453). No API keys or subscriptions are required — callers pay per request.\n\nThe endpoint accepts HTTP GET requests with no query parameters. Payment is 20,000 base units of USDC (6 decimals), which equals $0.02 per call. Payment can be made via the x402 protocol (X-PAYMENT header with a signed USDC authorization on Base) or via MPP using pathUSD on Tempo blockchain at $0.02. A free demo mode is available by appending `?demo=true` to the URL (limited to 10 calls per IP per hour).\n\nThe response is JSON (`application/json`), but the exact output schema is not documented beyond a generic description field. The provider's site lists this endpoint in the \"Premium\" tier alongside AI models, image generation, and sentiment endpoints. An MCP server (`npx @httpay/mcp`) is also available for integration with Claude Desktop or Cursor, handling payments automatically.","tags":[],"capabilities":["crypto-sentiment-analysis","x402-micropayment","usdc-on-base","mpp-tempo-settlement","no-api-key","demo-mode","mcp-server-integration","pay-per-call"],"categories":["crypto","data"],"synonyms":["crypto market mood","bitcoin sentiment","crypto fear greed","market sentiment API","crypto sentiment score","DeFi sentiment","x402 sentiment"],"warnings":["Output schema is effectively undocumented; the only example field is a generic 'description' string — actual response structure is unknown.","No dedicated docs page exists (/docs returns 404).","robots.txt disallows /api/ crawling, so automated discovery of endpoint behavior is limited.","The example_response_json shown is the placeholder from the outputSchema, not a confirmed real response."],"endpointUrl":"https://httpay.xyz/api/market-mood","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","chainId":8453,"version":"2"},"payTo":"0x5f5d6FcB315871c26F720dc6fEf17052dD984359","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://httpay.xyz/api/market-mood","extensions":{"bazaar":{"info":{"input":{"type":"http","method":"GET","queryParams":{}},"output":{"type":"json","example":{"description":"Current crypto market sentiment analysis"}}},"schema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}}}},"description":"Current crypto market sentiment analysis","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true},"output":{"type":"json","example":{"description":"Current crypto market sentiment analysis"}}},"maxAmountRequired":"20000","maxTimeoutSeconds":60}]},"qualityScore":"0.450","qualityRationale":"The endpoint is live (402 challenge captured) with clear pricing ($0.02 USDC on Base), but the output schema is essentially undocumented — only a placeholder description field is shown. No /docs page exists, no OpenAPI spec was retrievable for this specific endpoint, and no real example response is available. The actual structure and fields of the sentiment analysis response are 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'0.02':10,22,98,129 '000':89 '10':145 '20':88 '307':47 '6':94 '8453':64 'DeFi sentiment' 'accept':55,78 'ai':181 'alongsid':180 'also':194 'analysi':4,16,36 'api':52,66 'append':137 'application/json':155 'author':117 'automat':205 'avail':135,195 'base':9,21,61,90,119 'beyond':164 'bitcoin sentiment' 'blockchain':127 'call':12,24,51,100,146 'caller':72 'chain':62 'claud':199 'crypto':1,13,33 'crypto fear greed' 'crypto market mood' 'crypto sentiment score' 'crypto-sentiment-analysis' 'current':32 'cursor':202 'decim':95 'demo':132,138 'demo-mode' 'descript':167 'desktop':200 'document':163 'endpoint':27,53,77,175,187 'equal':97 'exact':158 'field':168 'free':131 'generat':184 'generic':166 'get':80 'handl':203 'header':112 'hour':150 'http':79 'httpay.xyz':29 'httpay/mcp':192 'id':63 'imag':183 'integr':197 'ip':148 'json':38,154 'key':67 'larger':44 'limit':143 'list':173 'made':104 'market':2,14,34 'market sentiment API' 'marketplac':45 'mcp':189 'mcp-server-integration' 'micropay':7,19,57 'mode':133 'model':182 'mpp':122 'mpp-tempo-settlement' 'no-api-key' 'npx':191 'output':159 'paramet':85 'part':41 'pathusd':124 'pay':49,73 'pay-per-cal':48 'pay-per-call' 'payment':86,101,111,204 'per':11,23,50,74,99,147,149 'premium':178 'protocol':108 'provid':170 'queri':84 'request':75,81 'requir':71 'respons':152 'return':30 'schema':160 'sentiment':3,15,35,186 'server':190 'sign':115 'site':172 'subscript':69 'tempo':126 'tier':179 'true':139 'unit':91 'url':142 'usdc':59,93,116 'usdc-on-base' 'use':123 'via':5,17,105,121 'x':110 'x-payment':109 'x402':6,18,56,107 'x402 sentiment' 'x402-micropayment'","prices":[{"id":"aad3186b-b594-44a0-849d-6e16419ff17e","listingId":"306ed91c-1cf5-402e-b2c1-34e99a5a7217","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"20000","chain":"base","payTo":"0x5f5d6FcB315871c26F720dc6fEf17052dD984359","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","chainId":8453,"version":"2"},"payTo":"0x5f5d6FcB315871c26F720dc6fEf17052dD984359","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://httpay.xyz/api/market-mood","extensions":{"bazaar":{"info":{"input":{"type":"http","method":"GET","queryParams":{}},"output":{"type":"json","example":{"description":"Current crypto market sentiment analysis"}}},"schema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}}}},"description":"Current crypto market sentiment analysis","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true},"output":{"type":"json","example":{"description":"Current crypto market sentiment analysis"}}},"maxAmountRequired":"20000","maxTimeoutSeconds":60}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":60},"createdAt":"2026-04-21T18:32:37.562Z"}],"sources":[{"listingId":"306ed91c-1cf5-402e-b2c1-34e99a5a7217","source":"x402_bazaar","sourceId":"https://httpay.xyz/api/market-mood","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:37.562Z","lastSeenAt":"2026-04-22T19:33:25.725Z"}],"details":{"listingId":"306ed91c-1cf5-402e-b2c1-34e99a5a7217","quickStartSnippet":"# Free demo (10 calls/IP/hour):\ncurl \"https://httpay.xyz/api/market-mood?demo=true\"\n\n# With x402 payment (Node.js):\nimport { withPayment } from \"x402-fetch\";\nconst res = await withPayment(\n  fetch(\"https://httpay.xyz/api/market-mood\"),\n  wallet\n);","exampleRequest":null,"exampleResponse":{"description":"Current crypto market sentiment analysis"},"schema":{"input":{"type":"http","method":"GET","discoverable":true},"output":{"type":"json","example":{"description":"Current crypto market sentiment analysis"}}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint costs 20,000 base units of USDC (6 decimals) = $0.02 per call on Base chain ID 8453","source_url":"https://httpay.xyz/api/market-mood"},{"claim":"MPP settlement is also available at $0.02 via pathUSD on Tempo blockchain","source_url":"https://httpay.xyz/api/market-mood"},{"claim":"Free demo mode available with ?demo=true, limited to 10 calls/IP/hour","source_url":"https://httpay.xyz/api/market-mood"},{"claim":"httpay.xyz hosts 307+ pay-per-call endpoints on Base with prices from $0.001 to $0.05","source_url":"https://httpay.xyz"},{"claim":"MCP server available via npx @httpay/mcp for Claude Desktop and Cursor integration","source_url":"https://httpay.xyz"},{"claim":"Premium tier endpoints ($0.05) include AI models, image gen, and sentiment","source_url":"https://httpay.xyz"}],"useCases":["Automated trading bots checking market sentiment before executing trades","AI agents incorporating real-time crypto mood into research summaries","Dashboard widgets displaying current market sentiment","Portfolio management tools adjusting risk based on sentiment signals"],"bestFor":["AI agents that can pay per call via x402 or MPP without managing API keys","Developers wanting quick crypto sentiment data without subscription commitments","MCP-compatible tools like Claude Desktop or Cursor needing live market context"],"notFor":["Users needing historical sentiment time-series data (endpoint appears to return current snapshot only)","Applications requiring detailed methodology or sourcing transparency for sentiment scores","High-frequency polling use cases where per-call costs would accumulate quickly"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-04-22T01:46:39.646Z"},"updatedAt":"2026-04-22T19:33:25.725Z"}}