{"uid":"cap_s6IKazg_oiEgPNGZ3SzYk","slug":"fastapi-online-image-watermark-bb95ed93","name":"fastapi.online — Image Watermark","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/image-watermark","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"file":{"type":"string","format":"binary","description":"Image file (PNG/JPEG/WebP)"},"text":{"type":"string"},"opacity":{"type":"string"},"position":{"type":"string"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0015","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":"down","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.0015/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0015","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0015","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_b-durT4SZmXD8PkJJKrUS","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.0015","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Adds a text watermark to an uploaded image with configurable opacity and position","exampleAgentPrompt":"Can you add a watermark to this product photo with the text '© Acme Corp 2024', placed in the bottom-right corner at 50% opacity?","exampleUseCases":[{"title":"Copyright protection for photography","prompt":"Add a watermark to this JPEG photo with the text '© Jane Doe Photography 2024' at 40% opacity in the bottom-right corner so my work is protected before I share it online."},{"title":"Branding product images for e-commerce","prompt":"Stamp all these product images with my brand name 'Bloom & Craft' as a watermark — center position, about 30% opacity — before I upload them to my shop."},{"title":"Marking confidential document screenshots","prompt":"I need to add a 'CONFIDENTIAL' watermark text to this PNG screenshot at 60% opacity, positioned in the center, before I send it out in a report."}],"resultDescription":"Returns a watermarked version of the uploaded image (PNG/JPEG/WebP) with the specified text overlaid at the chosen opacity and position","failureModes":["Unsupported file format (non-PNG/JPEG/WebP) returns an error","Missing required 'file' field returns a 422 validation error","Invalid opacity value (out of expected range) may produce unexpected visual output","Payment not included or insufficient results in 402 Payment Required","Very large image files may time out or be rejected"],"whenToPreferThis":"Choose this endpoint when you need a quick, pay-per-call watermarking operation without setting up your own image processing pipeline — especially useful for one-off or low-volume watermarking tasks where signup friction of larger SaaS tools is undesirable. Suitable for PNG, JPEG, and WebP images with simple text watermarks.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:28:01.922Z","isFirstParty":false}