{"status":"live","endpoint":"https://api.neurodynamic.tech/v1/audio/speech","authentication":"x402 payment only; no account or voice approval","price_usdc":"0.005","pricing_phase":"introductory","network":"eip155:8453","text_characters":1000,"output_seconds":120,"output_bytes":2097152,"format":"mp3","voice_catalogue":"/v1/audio/voices","default_voice":"af_heart","daily_quota":null,"concurrency":"Capacity controlled; busy requests receive Retry-After without settlement","billing":"Authorisation verified before generation. Settlement only after successful audio. Failed work is not charged.","recovery":"Identical body and saved payment proof recover the result for one hour. Do not sign again after an uncertain outcome.","retention":"Text is held only while processing. Output is retained for one hour for retry; uncertain settlement output is preserved for recovery. Payment receipts are retained separately.","instructions":"/narration"}