{"uid":"cap_ALILVE3xGzV6VplgVDead","slug":"api-direct-substack-post-fetcher-0adaf9fa","name":"API Direct – Substack Post Fetcher","description":"Get a Substack post by URL, ID, or publication and slug.","url":"https://x402.apidirect.io/v1/substack/post?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","required":[],"properties":{"url":{"type":"string","maxLength":500,"description":"Post URL, e.g. https://www.lennysnewsletter.com/p/all-of-the-lenny-and-friends-summit (max 500 characters). Provide url, post_id, or publication and slug."},"slug":{"type":"string","maxLength":200,"description":"Post URL slug, e.g. all-of-the-lenny-and-friends-summit, used together with publication."},"post_id":{"type":"string","description":"Numeric post ID, as returned in post_id. Provide url, post_id, or publication and slug."},"publication":{"type":"string","maxLength":500,"description":"Publication subdomain, host or URL, used together with slug."},"get_sentiment":{"type":"boolean","default":false,"description":"Set to true to add AI emotion analysis (Plutchik's Wheel) to each result. Adds +$0.001 per request to the cost. Returns emotion scores, dominant emotion, intensity, and polarity."}}}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.004","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":"$0.004/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_skN6QBZ-5qITKZLZ9P1jB","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.004","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Retrieve full details of a Substack post by URL, post ID, or publication subdomain and slug, with optional AI sentiment analysis.","exampleAgentPrompt":"Can you fetch the full content of this Substack post for me: https://www.lennysnewsletter.com/p/all-of-the-lenny-and-friends-summit — and also run sentiment analysis on it so I can see the dominant emotion and polarity?","exampleUseCases":[{"title":"Research a newsletter article","prompt":"Pull the full text of this Substack post for me: https://www.platformer.news/p/why-silicon-valley-is-backing-trump — I want to read it and understand what it's about."},{"title":"Sentiment analysis on a newsletter post","prompt":"Grab this Substack article by Lenny Rachitsky — publication is lennysnewsletter and the slug is all-of-the-lenny-and-friends-summit — and include the AI emotion analysis so I can see how positive or negative the tone is."},{"title":"Automated post monitoring pipeline","prompt":"I have a Substack post ID 145892317 that I need to pull the full metadata and content for so I can log it in my content tracker — can you fetch it?"}],"resultDescription":"Returns full Substack post data including title, body content, author, publication metadata, publish date, and post ID. When get_sentiment is true, also returns Plutchik's Wheel emotion scores, the dominant emotion, intensity level, and polarity (positive/negative/neutral).","failureModes":["Post not found — invalid URL, slug, or post ID returns a not-found error","Publication subdomain not found — incorrect or misspelled publication identifier","Missing required identifier — must provide at least one of: url, post_id, or publication+slug combination","Paywalled post content may be truncated or inaccessible","URL exceeds 500 character limit","Slug exceeds 200 character limit","Payment failure — insufficient USDC balance for x402 micropayment"],"whenToPreferThis":"Use this endpoint when you need to retrieve the full content or metadata of a specific Substack post and know its URL, post ID, or publication+slug. Ideal for newsletter monitoring, content research, sentiment analysis pipelines, or aggregating newsletter content. Prefer over general web scrapers when the target is specifically a Substack post, as this endpoint is purpose-built for Substack's structure and supports the optional Plutchik sentiment analysis add-on.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-30T19:07:53.950Z","isFirstParty":false,"canonicalSlug":"api-direct-substack-post-fetcher-0adaf9fa"}