{"uid":"cap_Iy60qcdbre4WT_oTlXeWB","slug":"forgemesh-pro-text-to-speech-0b986509","name":"ForgeMesh Pro Text-to-Speech","description":"Paid text-to-speech via x402. WAV audio in 31 languages, OpenAI-compatible, no API keys.","url":"https://tts.forgemesh.io/v1/tts/pro","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"lang":{"enum":["en","ko","ja","ar","bg","cs","da","de","el","es","et","fi","fr","hi","hr","hu","id","it","lt","lv","nl","pl","pt","ro","ru","sk","sl","sv","tr","uk","vi"],"type":"string","description":"Language code; 31 languages supported"},"text":{"type":"string","maxLength":2000,"minLength":1,"description":"Text to synthesize into speech, max 2000 characters. Use non-long routes for 1-500 chars and -long routes for 501-2000 chars."},"speed":{"type":"number","maximum":2,"minimum":0.7,"description":"Pro/Custom expressive speed control, 0.7-2.0. Presets: slow 0.7, normal 1.0, fast 1.3, rapid 1.6"},"steps":{"type":"integer","maximum":100,"minimum":1,"description":"Pro/Custom quality control, 1-100. Presets: draft 4, standard 8, high 16, ultra 24"},"voice":{"enum":["M1","M2","M3","M4","M5","F1","F2","F3","F4","F5"],"type":"string","description":"Standard voice: M1-M5 or F1-F5"}}},"responseSchema":{"type":"json","example":{"description":"44.1kHz 16-bit mono WAV speech audio returned inline","content_type":"audio/wav"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_mi3kQkGxZYVExJW-C3KnK","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Converts text to high-quality WAV audio speech supporting 31 languages, 10 voice options, and adjustable speed and quality settings, billed per call via x402 micropayments.","exampleAgentPrompt":"Read this text aloud in French using a female voice F2 at normal speed and standard quality: 'Bonjour, bienvenue sur notre plateforme. Nous sommes ravis de vous accueillir.' — give me a WAV file back.","exampleUseCases":[{"title":"Multilingual product announcement voiceover","prompt":"Generate a spoken WAV audio clip of this product announcement in Spanish using male voice M3 at fast speed and high quality steps of 16: 'Presentamos nuestro nuevo producto revolucionario, disponible ahora en toda Latinoamérica.'"},{"title":"Podcast intro narration in English","prompt":"Turn this intro script into speech with a female voice F1, normal speed 1.0, and ultra quality at 24 steps in English: 'Welcome back to The Future Forward podcast, where we explore ideas that shape tomorrow.'"},{"title":"Language learning audio flashcard","prompt":"Synthesize this Japanese phrase into WAV audio using voice M2, slow speed 0.7, and draft quality at 4 steps so I can hear the pronunciation clearly: '今日はいい天気ですね。'"}],"resultDescription":"Returns a raw WAV audio file (audio/wav) encoded at 44.1kHz 16-bit mono containing the synthesized speech. The audio length depends on the text length and speed parameter.","failureModes":["Text exceeds 2000 characters — use the -long route variant instead","Unsupported language code — only the 31 listed ISO language codes are accepted","Speed out of range (must be 0.7–2.0) — returns validation error","Steps out of range (must be 1–100) — returns validation error","Invalid voice ID — only M1-M5 and F1-F5 are valid","Payment failure via x402 — call rejected if USDC micropayment is not processed","Empty or missing text field — synthesis cannot proceed"],"whenToPreferThis":"Choose this endpoint when you need multilingual TTS (31 languages) with fine-grained control over voice gender, speech speed, and audio quality without managing API keys — particularly suited for agents using x402 crypto micropayment billing. Prefer it over OpenAI TTS or ElevenLabs when you want OpenAI-compatible semantics with per-call USDC payments and no subscription overhead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T17:51:15.221Z","isFirstParty":false}