{"uid":"cap_tYhAEEGcT3VB3wjP6cIrd","slug":"arch-tools-text-to-speech-d61c0c7b","name":"Arch Tools Text-to-Speech","description":"Convert text to natural-sounding audio via ElevenLabs (returns base64 MP3). Pay per call with USDC (x402) or credits - archtools.dev","url":"https://archtools.dev/v1/tools/text-to-speech","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"text":{"type":"string","description":"Text to convert (max 5,000 chars)"},"model_id":{"type":"string","description":"ElevenLabs model ID (default: eleven_turbo_v2_5)"},"voice_id":{"type":"string","default":"EXAVITQu4vr4xnSDxMaL","description":"ElevenLabs voice ID"},"stability":{"type":"number","description":"Voice stability 0-1 (default: 0.42)"},"similarity_boost":{"type":"number","description":"Voice similarity boost 0-1 (default: 0.82)"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.1","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":"$0.1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_DZmlSb7xpJF4pN3zMBj_n","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Converts text (up to 5,000 characters) into spoken audio using ElevenLabs voices, paid per-call in USDC on Base","exampleAgentPrompt":"Can you read this product description aloud using the ElevenLabs turbo model — here's the text: 'Welcome to our store. We offer handcrafted goods made with care and delivered to your door.' Keep the voice stability at 0.5 and similarity boost at 0.8.","exampleUseCases":[{"title":"Audiobook narration from article","prompt":"Take this 2,000-word article I wrote and convert it to spoken audio — use the default ElevenLabs voice and keep it natural-sounding with stability around 0.4 and similarity boost at 0.8."},{"title":"Custom voice podcast intro","prompt":"Generate a spoken intro for my podcast using ElevenLabs voice ID 'EXAVITQu4vr4xnSDxMaL' — the script is: 'Welcome to The Daily Byte, your five-minute tech briefing. I'm your host, and today we're covering AI, software, and the future of work.'"},{"title":"Accessibility audio for web content","prompt":"Turn this support article into an audio file so visually impaired users can listen to it — text is: 'To reset your password, click Forgot Password on the login screen and follow the instructions sent to your email.' Use the turbo model with default settings."}],"resultDescription":"A JSON response containing the synthesized audio output generated from the provided text, using the specified ElevenLabs model and voice configuration with the requested stability and similarity boost parameters.","failureModes":["Text exceeds 5,000 character limit — request rejected","Invalid ElevenLabs model_id or voice_id — synthesis fails","Stability or similarity_boost values outside 0-1 range — validation error","Payment not fulfilled in USDC on Base — 402 response returned","Empty or missing 'text' field — required field error"],"whenToPreferThis":"Choose this endpoint when you need pay-per-call text-to-speech with no subscription required, settled in USDC on Base via x402. It is particularly useful for agents that need on-demand voice synthesis with fine-grained ElevenLabs voice tuning (model selection, voice ID, stability, similarity boost) without managing API keys for ElevenLabs directly. Prefer it over direct ElevenLabs integration when you want crypto-native micropayment billing or when operating within the Arch Tools ecosystem alongside sibling tools.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":3,"lastUsedAt":"2026-08-05T16:08:09.040Z","lastSuccessfullyRanAt":"2026-08-05T16:08:09.040Z","lastHealthCheckAt":"2026-09-13T18:43:26.919Z","isFirstParty":false}