{"uid":"cap_2YGTYePibT-wPeQEoQSE6","slug":"fastapi-online-newsletter-generator-2291259c","name":"fastapi.online — Newsletter Generator","description":"Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding & crypto utilities, date/time calculators, geo/coordinate math, math & finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.","url":"https://api.fastapi.online/newsletter-generate","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"topic":{"type":"string","maxLength":500,"minLength":1},"sections":{"type":"string","maxLength":1000,"minLength":1}}},"responseSchema":null,"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_HdKaMmr8BlbGDOS-PbRpR","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":"Generates a complete newsletter draft for a given topic, structured into specified sections, using a self-hosted AI model.","exampleAgentPrompt":"Can you draft a newsletter about sustainable home gardening? Include sections for Introduction, Top Tips, Product Spotlight, and a Call to Action.","exampleUseCases":[{"title":"Weekly business update newsletter","prompt":"Write a newsletter for our SaaS startup about our new product launch. Include sections for What's New, Customer Stories, and Upcoming Events."},{"title":"Health and wellness email digest","prompt":"Generate a newsletter on mental health and mindfulness for our community. I want sections for Editor's Note, Featured Article, Quick Tips, and Resources."},{"title":"Crypto and Web3 audience newsletter","prompt":"Draft a newsletter covering the latest trends in decentralized finance. Sections should be: Market Overview, Top Projects to Watch, and How to Get Started."}],"resultDescription":"A fully generated newsletter draft containing content organized by the requested sections and focused on the given topic, returned as text from a self-hosted AI model.","failureModes":["Missing or empty topic field returns a validation error","Sections field exceeds 1000 character limit and is rejected","Self-hosted model unavailability causes 5xx errors","Payment not submitted or insufficient causes 402 Payment Required response","Malformed request body returns 422 Unprocessable Entity"],"whenToPreferThis":"Choose this endpoint when you need a quick, structured newsletter draft generated from a topic and custom section outline, without requiring a full LLM API integration. It is well-suited for agents automating content pipelines, where paying per call with crypto (no signup required) is convenient and the cost per newsletter ($0.002 USDC) is minimal.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:59:59.227Z","isFirstParty":false}