{"version":1,"name":"cryptofeed402","serviceName":"cryptofeed402","description":"Crypto market data for AI agents (Hyperliquid perps funding/OI, extreme funding, per-asset news sentiment, twice-daily brief) plus an agent-readiness audit. Pay per call in USDC on Base via x402; charged only on a successful response.","iconUrl":"https://cryptofeed402.site/icon.png","category":"data/markets","tags":["crypto","perpetuals","funding-rate","open-interest","sentiment","agent-readiness"],"openapi":"https://cryptofeed402.site/openapi.json","llms":"https://cryptofeed402.site/llms.txt","mcp":"https://cryptofeed402.site/mcp","mcp_server_card":"https://cryptofeed402.site/mcp/server-card","agent_card":"https://cryptofeed402.site/.well-known/agent-card.json","ai_catalog":"https://cryptofeed402.site/.well-known/ai-catalog.json","ard":"https://cryptofeed402.site/.well-known/ard.json","samples":"https://cryptofeed402.site/samples","pricing":"https://cryptofeed402.site/pricing","api_version":"0.9.0","billing":"Payment settles only for a valid 200 response; 4xx/5xx responses are never charged and carry no receipt.","receipts":{"alg":"Ed25519","key_id":"cf402-rk-06f3d92517614c38","public_key":"FbX3fMloih1T5xF7j3MRe3LmTdXYdpnrikz2BcpSPrQ","public_key_encoding":"base64url (raw 32-byte Ed25519 public key)","jwk":{"kty":"OKP","crv":"Ed25519","x":"FbX3fMloih1T5xF7j3MRe3LmTdXYdpnrikz2BcpSPrQ","kid":"cf402-rk-06f3d92517614c38","use":"sig","alg":"EdDSA"},"key_url":"https://cryptofeed402.site/.well-known/receipt-key.json","headers":{"receipt":"X-Receipt","signature":"X-Receipt-Signature"},"applies_to":"every paid HTTP 200 that settled via x402 (errors such as 400/404/429/503 are never charged and carry no receipt)","receipt_fields":["v","request_id","route","method","url","status","network","asset","asset_symbol","amount_unit","payTo","payer","quoted_amount","charged_amount","settle_tx","body_sha256","body_bytes","as_of","issued_at","key_id"],"verification":["base64url-decode the X-Receipt header to get the receipt JSON bytes (do not re-serialize).","base64url-decode X-Receipt-Signature and verify it as an Ed25519 signature over those exact bytes with this public key.","Parse the JSON; check key_id matches, and sha256(raw response body bytes) as lowercase hex equals body_sha256.","Optionally check settle_tx on Base (USDC transfer to payTo for charged_amount) and that charged_amount <= quoted_amount."],"settlement":"Payment settles only after the handler produced a valid 200; failed or error responses are not settled."},"feedback":{"report_schedule":{"method":"POST","url":"https://cryptofeed402.site/feedback/schedule","price":"free","description":"Tell us how often and at which UTC hours you want reports; aggregate results at GET /feedback/schedule","schema":{"type":"object","additionalProperties":false,"required":["frequency","preferred_utc_hours"],"properties":{"frequency":{"type":"string","enum":["hourly","every_4h","every_6h","every_12h","daily","on_event"],"description":"How often you want reports/briefs"},"preferred_utc_hours":{"type":"array","items":{"type":"integer","minimum":0,"maximum":23},"maxItems":6,"uniqueItems":true,"description":"Best UTC hours (0-23) to have a fresh report ready, up to 6; [] = no preference"},"symbols":{"type":"array","items":{"type":"string","pattern":"^[A-Z0-9]{1,20}$"},"maxItems":20,"uniqueItems":true,"description":"Optional tickers you care about, e.g. BTC"},"routes_of_interest":{"type":"array","items":{"type":"string","enum":["/price/{symbol}","/funding/extreme","/brief/latest","/history","/perps/{symbol}","/sentiment/{symbol}","/audit/agent-ready","/brief/teaser","/brief/sample","/outlook/{symbol}","/funding/history/{symbol}"]},"maxItems":11,"uniqueItems":true,"description":"Optional routes you would use"},"agent_name":{"type":"string","maxLength":64,"description":"Optional agent name/id (plain text)"},"note":{"type":"string","maxLength":280,"description":"Optional note (plain text, <=280 chars; never published)"}}}}},"resources":[{"url":"https://cryptofeed402.site/price/BTC","path_template":"/price/{symbol}","method":"GET","name":"cryptofeed402","description":"Live snapshot for one major coin (BTC, ETH, SOL, HYPE, NEAR, AAVE): Hyperliquid perp mark price, hourly funding rate and annualized funding APR, open interest in coins and USD, 24h volume and premium, plus OKX spot last price and 24h change. Use it when a trading agent needs current price and perp positioning for a single asset before sizing or timing a trade. JSON. Free sample at /samples/price. $0.0025 USDC per call on Base.","price":"$0.0025","currency":"USDC","network":"eip155:8453","payTo":"0x93e4B468A88B1f084Efc781ec7A1E2D195a40D22","tags":["crypto","market-data","perps","hyperliquid","trading-agents"]},{"url":"https://cryptofeed402.site/funding/extreme","path_template":"/funding/extreme","method":"GET","name":"cryptofeed402 perp funding rates + open interest","description":"Perpetual futures funding rates and open interest (Hyperliquid), live: the 10 perps with the most extreme funding rate now (over $1M 24h volume), each with annualized funding APR and open interest in USD, plus the current funding rate for a BTC/ETH/SOL/HYPE/NEAR/AAVE watchlist. Use it to spot crowded longs or shorts, squeeze risk and funding-carry candidates. For one perp's full funding + OI snapshot use /perps/{symbol}. JSON. Free sample: /samples/funding. $0.0025 USDC per call on Base.","price":"$0.0025","currency":"USDC","network":"eip155:8453","payTo":"0x93e4B468A88B1f084Efc781ec7A1E2D195a40D22","tags":["funding-rate","open-interest","perpetuals","derivatives","hyperliquid"]},{"url":"https://cryptofeed402.site/brief/latest","path_template":"/brief/latest","method":"GET","name":"cryptofeed402","description":"LLM-written crypto market brief, published twice daily: analysis, not just raw numbers. Plain-English headline and bottom line, sentiment and Fear & Greed, funding rates and open interest (OKX + Hyperliquid) with crowded-trade flags, extreme funding, watchlist prices and 24h/7d moves, top news, macro economic calendar and token unlocks for the next 7 days. JSON plus markdown. Free preview at /brief/sample. $0.015 USDC per call on Base.","price":"$0.015","currency":"USDC","network":"eip155:8453","payTo":"0x93e4B468A88B1f084Efc781ec7A1E2D195a40D22","tags":["crypto","market-brief","funding-rates","sentiment","trading-agents"]},{"url":"https://cryptofeed402.site/history?from=2026-10-17&to=2026-10-18","path_template":"/history","method":"GET","name":"cryptofeed402","description":"Archive of past cryptofeed402 twice-daily LLM-written market briefs for a date range (from/to as YYYY-MM-DD, up to 366 days): sentiment, funding, open interest, prices, news and macro calendar per edition. Use it for backtesting, building historical context or reviewing how funding and sentiment evolved. JSON. Free sample at /samples/history. $0.005 USDC per day in range, capped at $0.5 per call, on Base.","price":"$0.005 per day, cap $0.5 per call","currency":"USDC","network":"eip155:8453","payTo":"0x93e4B468A88B1f084Efc781ec7A1E2D195a40D22","tags":["crypto","market-brief","historical-data","funding-rates","backtesting"]},{"url":"https://cryptofeed402.site/perps/BTC","path_template":"/perps/{symbol}","method":"GET","name":"cryptofeed402 perps radar (funding + open interest)","description":"Perpetual futures funding rate and open interest snapshot for one Hyperliquid perp (any listed coin, e.g. BTC, ETH, SOL, HYPE): current hourly funding, 8h and annualized rate, open interest in coins and USD, 24h volume, mark and oracle price, premium, 24h change, and whether it ranks in the top 10 funding extremes. venues[] uses symbol / venue / funding_rate / open_interest_usd plus as_of. Unknown symbols: 404, no charge. JSON. Free sample at /samples/perps. $0.002 USDC per call on Base.","price":"$0.002","currency":"USDC","network":"eip155:8453","payTo":"0x93e4B468A88B1f084Efc781ec7A1E2D195a40D22","tags":["funding-rate","open-interest","perpetuals","derivatives","hyperliquid"]},{"url":"https://cryptofeed402.site/audit/agent-ready?url=https%3A%2F%2Fcryptofeed402.site","path_template":"/audit/agent-ready","method":"GET","name":"cryptofeed402 agent-readiness audit","description":"Agent-readiness audit for a public website or x402 API: checks llms.txt, robots.txt AI-crawler rules, sitemap, OpenAPI, /.well-known/x402, agent card, an MCP initialize probe, a live unpaid 402 challenge (accepts, network, payTo, Bazaar metadata) and listings on Roundhouse, 402 Index and x402 Doctor. Returns a 0-100 score, pass/warn/fail per check with evidence and a concrete fix. Deterministic, no LLM. Free example at /audit/sample. $0.05 USDC per call on Base.","price":"$0.05","currency":"USDC","network":"eip155:8453","payTo":"0x93e4B468A88B1f084Efc781ec7A1E2D195a40D22","tags":["agent-readiness","x402","llms-txt","mcp","developer-tools"]},{"url":"https://cryptofeed402.site/outlook/BTC","path_template":"/outlook/{symbol}","method":"GET","name":"cryptofeed402 pre-trade preflight","description":"Pre-trade preflight for one Hyperliquid perp in one call: perp mark vs OKX spot and oracle in bps, funding (hourly/8h/annualized) and its extreme rank, open interest and change vs ~1h/~24h, news sentiment, as_of per component and neutral flags (funding_extreme, oi_spike, venue_divergence, stale_component). Factual checks, no recommendation. Unknown symbol 404, no charge. Free sample at /samples/outlook. $0.01 USDC per call on Base.","price":"$0.01","currency":"USDC","network":"eip155:8453","payTo":"0x93e4B468A88B1f084Efc781ec7A1E2D195a40D22","tags":["pre-trade","perpetuals","funding-rate","open-interest","trading-agents"]},{"url":"https://cryptofeed402.site/funding/history/BTC?hours=168","path_template":"/funding/history/{symbol}","method":"GET","name":"cryptofeed402 funding history","description":"Hourly funding rate history for one Hyperliquid perp: each settlement's rate (hourly, 8h, annualized) and premium, plus mean/min/max, positive/negative hours and cumulative rate. hours=1-720 (default 168) or from/to, max 720 hours per call; history back to each perp's listing. Bad params 400, unknown symbol 404, no charge. Free sample at /samples/funding-history. $0.005 USDC per call on Base.","price":"$0.005 per call (up to 720 hours)","currency":"USDC","network":"eip155:8453","payTo":"0x93e4B468A88B1f084Efc781ec7A1E2D195a40D22","tags":["funding-rate","historical-data","perpetuals","backtesting","hyperliquid"]},{"url":"https://cryptofeed402.site/sentiment/BTC","path_template":"/sentiment/{symbol}","method":"GET","name":"cryptofeed402 crypto news sentiment","description":"Crypto news sentiment for one asset (BTC, ETH, SOL, HYPE, NEAR, AAVE and others; list at /sentiment): a -1..1 score with bearish/neutral/bullish label, counts of positive, negative and neutral headlines in the window, and up to 5 top headlines with source, link and stance. Headlines are labeled by a local LLM; the score is plain arithmetic. Refreshed about every 15 min. Unknown symbol 404, stale data 503, no charge. JSON. Free sample at /samples/sentiment. $0.002 USDC per call on Base.","price":"$0.002","currency":"USDC","network":"eip155:8453","payTo":"0x93e4B468A88B1f084Efc781ec7A1E2D195a40D22","tags":["sentiment","crypto-news","market-data","headlines","trading-agents"]}]}