{"uid":"cap_QgyP8xl9H4zM4FeAqhedD","slug":"forgemesh-custom-text-to-speech-x402-5a0b1df8","name":"ForgeMesh Custom Text-to-Speech (x402)","description":"Paid text-to-speech via x402. WAV audio in 31 languages, OpenAI-compatible, no API keys.","url":"https://tts.forgemesh.io/v1/tts/custom","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","Storyteller","Narrator","Announcer","Assistant","Urgent","Sage","Spark","Anchor","Velvet","Echo"],"type":"string","description":"Voice name. Standard voices M1-M5/F1-F5; persona voices require Custom tier."}}},"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":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_1XSBo0DqHfNmEG9pAv6jm","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","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 in 31 languages using expressive voice personas with configurable speed and quality, paid per-call via x402 USDC micropayment.","exampleAgentPrompt":"Can you read this aloud in Spanish using a warm female voice (F2) at normal speed with standard quality — here's the text: 'Bienvenidos a nuestra plataforma de aprendizaje. Esperamos que disfruten la experiencia.'","exampleUseCases":[{"title":"Multilingual e-learning narration","prompt":"Take this lesson intro paragraph and generate spoken audio in Japanese using the Narrator voice at standard quality and normal speed: 'このコースでは、基本的なプログラミングの概念を学びます。'"},{"title":"Urgent announcement voiceover","prompt":"Convert this safety alert into speech using the Urgent voice persona in English at fast speed and draft quality: 'All personnel must evacuate the building immediately via the nearest exit.'"},{"title":"Storytelling podcast audio","prompt":"Generate a high-quality audio clip in French with the Storyteller voice at slow speed and ultra quality for this opening scene: 'Il était une fois, dans une forêt lointaine, un jeune garçon nommé Léon qui rêvait de voyager.'"}],"resultDescription":"Returns a 44.1kHz 16-bit mono WAV audio file inline as audio/wav content, containing the synthesized speech corresponding to the submitted text, ready for playback or downstream processing.","failureModes":["Payment failure if x402 USDC funds are insufficient — HTTP 402 returned","Text exceeds 2000 character limit — validation error","Unsupported language code submitted — enum validation error","Speed outside 0.7–2.0 range — validation error","Steps outside 1–100 range — validation error","Persona voice requested on non-Custom tier — access denied or fallback","Empty or missing text field — validation error"],"whenToPreferThis":"Choose this endpoint when you need pay-per-call TTS with no API key or account setup, require broad multilingual coverage (31 languages), want expressive persona voices beyond generic TTS, or need fine-grained control over speech speed and synthesis quality. Ideal for agents operating in micropayment-native (x402) environments or when avoiding subscription-based TTS APIs.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T17:51:12.194Z","isFirstParty":false}