{"uid":"cap_q9imLk2Yf7sF2QL_uJZ4O","slug":"hars-zero-signal-url-fetch-content-extraction-api-945db9c1","name":"HARS-Zero Signal URL Fetch & Content Extraction API","description":"Utility API for AI agents — fetch URLs, extract structured HTML,\nsummarize text, get live FX rates, and geocode addresses. Pay per call\nin USDC on Base or Solana via x402. No API keys, no subscriptions.\nSub-cent pricing optimized for high-volume agent loops.","url":"https://hars.cryptotavern.xyz/paid/fetch","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["as_of","url","title","markdown"],"properties":{"url":{"type":"string","format":"uri"},"size":{"type":"integer"},"as_of":{"type":"string","format":"date-time","description":"RFC3339 timestamp"},"risks":{"type":"array","items":{"type":"string"}},"title":{"type":"string"},"status":{"type":"integer"},"product":{"type":"string"},"evidence":{"type":"array","items":{"type":"string","format":"uri"},"description":"Polymarket order book / event / reference URLs"},"markdown":{"type":"string"},"og_image":{"type":"string"},"canonical":{"type":"string"},"final_url":{"type":"string","format":"uri"},"truncated":{"type":"boolean"},"confidence":{"type":"number","maximum":1,"minimum":0,"description":"Model confidence 0.0-1.0"},"market_ids":{"type":"array","items":{"type":"string"},"description":"Polymarket slugs or ids referenced in this response"},"content_type":{"type":"string"},"og_description":{"type":"string"},"next_best_action":{"type":"object","properties":{"why":{"type":"string"},"endpoint":{"type":"string"},"price_usd":{"type":"number"},"product_id":{"type":"string"}}}},"description":"URL -> clean markdown + metadata."},"responseSchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["as_of","url","title","markdown"],"properties":{"url":{"type":"string","format":"uri"},"size":{"type":"integer"},"as_of":{"type":"string","format":"date-time","description":"RFC3339 timestamp"},"risks":{"type":"array","items":{"type":"string"}},"title":{"type":"string"},"status":{"type":"integer"},"product":{"type":"string"},"evidence":{"type":"array","items":{"type":"string","format":"uri"},"description":"Polymarket order book / event / reference URLs"},"markdown":{"type":"string"},"og_image":{"type":"string"},"canonical":{"type":"string"},"final_url":{"type":"string","format":"uri"},"truncated":{"type":"boolean"},"confidence":{"type":"number","maximum":1,"minimum":0,"description":"Model confidence 0.0-1.0"},"market_ids":{"type":"array","items":{"type":"string"},"description":"Polymarket slugs or ids referenced in this response"},"content_type":{"type":"string"},"og_description":{"type":"string"},"next_best_action":{"type":"object","properties":{"why":{"type":"string"},"endpoint":{"type":"string"},"price_usd":{"type":"number"},"product_id":{"type":"string"}}}},"description":"URL -> clean markdown + metadata."},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_6OZUIsHRMM3pKtthY8eTk","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches a URL and returns clean markdown content plus structured metadata (title, canonical URL, OG tags, content type, confidence score, and optional next-best-action hint) for AI agent consumption.","exampleAgentPrompt":"Fetch the content of https://techcrunch.com/2025/01/15/openai-latest-news/ and give me the title, a clean markdown version of the article, and what the OG description says.","exampleUseCases":[{"title":"Research article summarization for agent","prompt":"Go fetch https://www.bbc.com/news/world-us-canada-12345678 and pull out the title, the clean article text as markdown, and the publication timestamp so I can summarize it."},{"title":"Competitor landing page monitoring","prompt":"Fetch https://www.competitor.com/pricing and return the full page as markdown along with the canonical URL and confidence score — I want to track what their pricing page says."},{"title":"Evidence gathering for prediction markets","prompt":"Pull the content from https://apnews.com/article/election-results-2025 and return the markdown text plus any Polymarket evidence links you find, so I can verify the outcome of this event."}],"resultDescription":"Returns a JSON object containing: the resolved URL, page title, clean markdown of the page body, OG image URL, OG description, canonical URL, content-type, HTTP status code, page size in bytes, RFC3339 as_of timestamp, a boolean truncated flag, a confidence score (0.0–1.0), optional arrays of risk strings and evidence URLs, optional Polymarket market_ids, and an optional next_best_action object suggesting a follow-up endpoint with reasoning and price.","failureModes":["Target URL is unreachable or returns a non-200 status — status field will reflect the HTTP error code","Page content is too large and gets truncated — truncated field set to true with partial markdown","URL is malformed or not a valid URI — request validation error","Target site blocks crawlers — may return empty or low-confidence markdown","Confidence score near 0 indicating extraction was unreliable","Payment via x402 fails or is rejected — 402 response before content is returned"],"whenToPreferThis":"Choose this endpoint when an AI agent needs to fetch and read arbitrary live web content without managing API keys or subscriptions, especially in high-volume loops where sub-cent per-call pricing matters. It is ideal when you need both clean readable markdown AND structured metadata (OG tags, canonical URL, confidence score) in a single call. Prefer it over generic HTTP fetch when you want the content pre-processed into markdown with structured fields your agent can act on directly. The built-in next_best_action hint makes it useful in multi-step agent pipelines that need guidance on follow-up calls.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:38:38.402Z","isFirstParty":false}