{"uid":"cap_2-4Cu-QexdB2z4TCeastC","slug":"fastapi-online-reply-suggest-b82df52f","name":"fastapi.online Reply Suggest","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/reply-suggest","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"count":{"type":"integer","maximum":6,"minimum":1},"message":{"type":"string","maxLength":4000,"minLength":1}}},"responseSchema":null,"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___X2teE4_ejZtV_tsrzkX","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":"Generates multiple suggested reply options for a given message, useful for drafting conversational responses quickly.","exampleAgentPrompt":"Suggest 3 different replies I could send to this message: 'Hey, are you still interested in collaborating on the project? We'd love to have you on board!'","exampleUseCases":[{"title":"Customer support response drafting","prompt":"Give me 4 suggested replies to this customer message so I can pick the best one: 'I've been waiting 2 weeks for my order and still haven't received any tracking information. This is really frustrating.'"},{"title":"Social media comment replies","prompt":"Suggest 3 ways I could reply to this comment on my post: 'Love your content! Do you offer any coaching or courses?'"},{"title":"Professional email response options","prompt":"Generate 2 possible responses I could send to this email: 'We'd like to schedule a follow-up call to discuss the proposal you sent last week — does Thursday work for you?'"}],"resultDescription":"Returns a list of 1–6 suggested reply texts for the provided input message, each representing a distinct way to respond to that message. The agent can present these options to the user for selection or further editing.","failureModes":["Message text is empty or missing — returns 400 validation error","Count is out of range (below 1 or above 6) — returns 422 unprocessable entity","Message exceeds 4000 characters — returns 422 validation error","Payment not included or insufficient — returns 402 payment required","Model inference timeout — may return 503 or timeout error"],"whenToPreferThis":"Choose this endpoint when you need multiple ready-to-use reply options for a single message — ideal for customer support automation, social media management, or any workflow where a human needs to quickly pick from pre-drafted responses. Prefer this over a generic chat endpoint when the goal is reply suggestion diversity rather than a single AI-generated answer.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:47:29.070Z","isFirstParty":false}