{"uid":"cap_H3pJBJP9jzTgRDA8ejpfd","slug":"hars-zero-signal-api-text-summarization-a4243264","name":"HARS-Zero Signal API — Text Summarization","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/summarize","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["as_of","summary","entities","confidence"],"properties":{"as_of":{"type":"string","format":"date-time","description":"RFC3339 timestamp"},"risks":{"type":"array","items":{"type":"string"}},"product":{"type":"string"},"summary":{"type":"array","items":{"type":"string"},"maxItems":5,"minItems":1},"entities":{"type":"array","items":{"type":"object","required":["text","type"],"properties":{"text":{"type":"string"},"type":{"enum":["person","org","place","date","money","other"],"type":"string"}}}},"evidence":{"type":"array","items":{"type":"string","format":"uri"},"description":"Polymarket order book / event / reference URLs"},"confidence":{"type":"number","maximum":1,"minimum":0,"description":"Model confidence 0.0-1.0"},"market_ids":{"type":"array","items":{"type":"string"},"description":"Polymarket slugs or ids referenced in this response"},"word_count":{"type":"integer"},"sentence_count":{"type":"integer"},"next_best_action":{"type":"object","properties":{"why":{"type":"string"},"endpoint":{"type":"string"},"price_usd":{"type":"number"},"product_id":{"type":"string"}}},"compression_ratio":{"type":"number"}},"description":"Text -> 3-bullet summary + key entities + confidence."},"responseSchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["as_of","summary","entities","confidence"],"properties":{"as_of":{"type":"string","format":"date-time","description":"RFC3339 timestamp"},"risks":{"type":"array","items":{"type":"string"}},"product":{"type":"string"},"summary":{"type":"array","items":{"type":"string"},"maxItems":5,"minItems":1},"entities":{"type":"array","items":{"type":"object","required":["text","type"],"properties":{"text":{"type":"string"},"type":{"enum":["person","org","place","date","money","other"],"type":"string"}}}},"evidence":{"type":"array","items":{"type":"string","format":"uri"},"description":"Polymarket order book / event / reference URLs"},"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"},"word_count":{"type":"integer"},"sentence_count":{"type":"integer"},"next_best_action":{"type":"object","properties":{"why":{"type":"string"},"endpoint":{"type":"string"},"price_usd":{"type":"number"},"product_id":{"type":"string"}}},"compression_ratio":{"type":"number"}},"description":"Text -> 3-bullet summary + key entities + confidence."},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ruNkUDtuSJ96E08pY1iPg","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Summarizes input text into 1–5 bullet points with named-entity extraction and a model-confidence score, paid per call in USDC via x402","exampleAgentPrompt":"Summarize this article into bullet points and tell me which people, organizations, and places are mentioned, along with how confident you are: [paste article text here]","exampleUseCases":[{"title":"News article digest for agent pipeline","prompt":"Take this 800-word Reuters article about the Fed rate decision and boil it down to 3–5 key bullets, pull out all the people and organizations mentioned, and give me a confidence score on the summary."},{"title":"Due diligence document triage","prompt":"I've got a 2-page company overview from a pitch deck — can you compress it into the most important points, flag any monetary figures or dates, and tell me how compressed the output is compared to the original?"},{"title":"Social media monitoring summary","prompt":"Summarize this Twitter thread about the new EU AI regulation into a few concise bullets, extract any organizations or policy names referenced, and let me know how confident the model is in the summary."}],"resultDescription":"Returns a JSON object containing: an array of 1–5 summary bullet strings, an array of named entities each tagged as person/org/place/date/money/other, a confidence float (0–1), an RFC3339 timestamp, and optional metadata including word count, sentence count, compression ratio, product label, risks array, evidence URLs, Polymarket market IDs, and a next-best-action suggestion pointing to related endpoints.","failureModes":["Payment not received or insufficient USDC — 402 response requiring x402 payment header","Empty or missing text input — validation error returned","Text too short or malformed — low confidence score or minimal summary bullets","Network timeout on upstream model call — may return partial or no summary","Schema validation failure if required fields (as_of, summary, entities, confidence) cannot be populated"],"whenToPreferThis":"Choose this endpoint when you need a fast, cheap, pay-per-call text summarization with structured entity extraction and no API key setup — especially in high-volume agent loops where sub-cent pricing matters. Prefer it over subscription NLP APIs when you want to avoid monthly commitments and pay only for what you use in USDC on Base or Solana. It is particularly well-suited for pipelines that also use other HARS utility endpoints (URL fetch, FX rates, geocoding) since all share the same x402 payment flow.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:32:07.084Z","isFirstParty":false}