{"uid":"cap_gWiE3-gDF_e3oWzdp3giL","slug":"synapse-ai-content-detection-251bbfb8","name":"Synapse AI Content Detection","description":"Public data and utility APIs paid per call in USDC on Base (x402). No accounts, no API keys. 174 routes: crypto/equity data, onchain reads, DNS/email/security intel, geo/weather, x402 payment diagnostics, dev utilities and more.","url":"https://anibalb.duckdns.org/x402/ai-content-detection?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"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"}}}}},"responseSchema":{"type":"json","example":{"signals":{"burstiness":0.4,"repetition":0.2,"formal_connectors":0.3,"lexical_diversity":0.5},"verdict":"probable IA","probability":72.3}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_I-pbF_T9DhgxpVlbypVCf","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Analyzes text to detect whether it was AI-generated, returning linguistic signals and a probability verdict","exampleAgentPrompt":"Can you check whether this paragraph was written by an AI? I want to see the burstiness, repetition, and lexical diversity scores plus the final verdict and probability: 'The intersection of technological innovation and human creativity presents a unique opportunity for growth and development.'","exampleUseCases":[{"title":"Screen student essays for AI authorship","prompt":"I got 30 student essay submissions and I'm suspicious some were written by ChatGPT. Can you run this paragraph through AI content detection and tell me the verdict and probability score: 'In conclusion, the multifaceted nature of climate change demands a holistic approach that encompasses both individual and societal responsibilities.'"},{"title":"Verify editorial content before publishing","prompt":"Before we publish this guest blog post, can you check if it's AI-generated? Here's the opening paragraph: 'The evolving landscape of digital marketing requires brands to adopt a more nuanced and sophisticated approach to consumer engagement.' Give me the full signal breakdown."},{"title":"Flag AI-written job application","prompt":"Can you analyze this cover letter excerpt for signs it was written by an AI and give me a probability score? The text is: 'I am deeply passionate about contributing my skills and expertise to your esteemed organization, as I believe my background aligns seamlessly with your organizational objectives.'"}],"resultDescription":"Returns a JSON object with four linguistic signal scores (burstiness, repetition, formal_connectors, lexical_diversity each as 0-1 floats), a human-readable verdict string (e.g. 'probable IA'), and a probability percentage indicating likelihood of AI authorship.","failureModes":["Missing or empty input text returns a validation error","Text that is too short may produce unreliable signal scores with low confidence","Non-English text may yield inaccurate verdicts due to training bias","Payment failure via x402 returns HTTP 402 before any analysis is performed","Very long inputs may time out or be truncated"],"whenToPreferThis":"Choose this endpoint when you need a fast, no-account, pay-per-call AI content detection check with granular linguistic signal scores (burstiness, repetition, formal connectors, lexical diversity) rather than just a binary verdict. Ideal for agents that need to verify content authenticity on-the-fly without managing API keys or subscriptions, and when cost control via micro-payments in USDC is preferred.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:42:05.106Z","isFirstParty":false,"canonicalSlug":"synapse-ai-content-detection-251bbfb8"}