{
  "x402Version": 2,
  "id": 30771,
  "slug": "30771",
  "resource": "https://voice.forgemesh.io/v1/tts/custom-long",
  "description": "Expressive text-to-speech in any of 20 voices, standard M1-M5/F1-F5 plus personas like Storyteller, Narrator, Announcer, Urgent, Velvet, with speed and quality control, for 501-2000 characters, WAV output. Use it to: narrate a longer story or audiobook chapter, voice an extended character monologue, produce a branded multi-sentence announcement, script a persona-driven podcast segment. USDC on Base via x402.",
  "type": "http",
  "resourceType": "News",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0x962794FB8aD92941fAf1ab446b9e30637B86F331",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "10000",
      "amountUsd": 0.01,
      "maxTimeoutSeconds": 1800
    }
  ],
  "outputSchema": {
    "properties": {
      "example": {
        "properties": {
          "audio": {
            "description": "Inline WAV bytes in the HTTP response body",
            "type": "string"
          },
          "content_type": {
            "const": "audio/wav",
            "type": "string"
          }
        },
        "type": "object"
      },
      "type": {
        "type": "string"
      }
    },
    "required": [
      "type"
    ],
    "type": "object"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "lang": "en",
            "text": "Hello world",
            "voice": "M1"
          },
          "bodyType": "json",
          "method": "POST",
          "type": "http"
        },
        "output": {
          "example": {
            "content_type": "audio/wav",
            "description": "44.1kHz 16-bit mono WAV speech audio returned inline"
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "body": {
                "additionalProperties": false,
                "properties": {
                  "lang": {
                    "description": "Language code; 31 languages supported",
                    "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"
                  },
                  "speed": {
                    "description": "Pro/Custom expressive speed control, 0.7-2.0. Presets: slow 0.7, normal 1.0, fast 1.3, rapid 1.6",
                    "maximum": 2,
                    "minimum": 0.7,
                    "type": "number"
                  },
                  "steps": {
                    "description": "Pro/Custom quality control, 1-100. Presets: draft 4, standard 8, high 16, ultra 24",
                    "maximum": 100,
                    "minimum": 1,
                    "type": "integer"
                  },
                  "text": {
                    "description": "Text to synthesize into speech, max 2000 characters. Use non-long routes for 1-500 chars and -long routes for 501-2000 chars.",
                    "maxLength": 2000,
                    "minLength": 1,
                    "type": "string"
                  },
                  "voice": {
                    "description": "Voice name. Standard voices M1-M5/F1-F5; persona voices require Custom tier.",
                    "enum": [
                      "M1",
                      "M2",
                      "M3",
                      "M4",
                      "M5",
                      "F1",
                      "F2",
                      "F3",
                      "F4",
                      "F5",
                      "Storyteller",
                      "Narrator",
                      "Announcer",
                      "Assistant",
                      "Urgent",
                      "Sage",
                      "Spark",
                      "Anchor",
                      "Velvet",
                      "Echo"
                    ],
                    "type": "string"
                  }
                },
                "required": [
                  "text"
                ],
                "type": "object"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              },
              "method": {
                "enum": [
                  "POST"
                ],
                "type": "string"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "properties": {
                  "audio": {
                    "description": "Inline WAV bytes in the HTTP response body",
                    "type": "string"
                  },
                  "content_type": {
                    "const": "audio/wav",
                    "type": "string"
                  }
                },
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    },
    "tags": [
      "text-to-speech",
      "tts",
      "persona-voices",
      "long-form",
      "narration",
      "audio",
      "wav"
    ]
  },
  "tags": [
    "bazaar",
    "tags"
  ],
  "sourceHost": "voice.forgemesh.io",
  "lastUpdated": "2026-10-12T08:37:39.503Z",
  "quality": {
    "calls30d": 10,
    "uniquePayers30d": 4,
    "lastCalledAt": "2026-10-12T08:37:39.33Z"
  },
  "metadata": {
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "lang": "en",
              "text": "Hello world",
              "voice": "M1"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "content_type": "audio/wav",
              "description": "44.1kHz 16-bit mono WAV speech audio returned inline"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "additionalProperties": false,
                  "properties": {
                    "lang": {
                      "description": "Language code; 31 languages supported",
                      "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"
                    },
                    "speed": {
                      "description": "Pro/Custom expressive speed control, 0.7-2.0. Presets: slow 0.7, normal 1.0, fast 1.3, rapid 1.6",
                      "maximum": 2,
                      "minimum": 0.7,
                      "type": "number"
                    },
                    "steps": {
                      "description": "Pro/Custom quality control, 1-100. Presets: draft 4, standard 8, high 16, ultra 24",
                      "maximum": 100,
                      "minimum": 1,
                      "type": "integer"
                    },
                    "text": {
                      "description": "Text to synthesize into speech, max 2000 characters. Use non-long routes for 1-500 chars and -long routes for 501-2000 chars.",
                      "maxLength": 2000,
                      "minLength": 1,
                      "type": "string"
                    },
                    "voice": {
                      "description": "Voice name. Standard voices M1-M5/F1-F5; persona voices require Custom tier.",
                      "enum": [
                        "M1",
                        "M2",
                        "M3",
                        "M4",
                        "M5",
                        "F1",
                        "F2",
                        "F3",
                        "F4",
                        "F5",
                        "Storyteller",
                        "Narrator",
                        "Announcer",
                        "Assistant",
                        "Urgent",
                        "Sage",
                        "Spark",
                        "Anchor",
                        "Velvet",
                        "Echo"
                      ],
                      "type": "string"
                    }
                  },
                  "required": [
                    "text"
                  ],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "audio": {
                      "description": "Inline WAV bytes in the HTTP response body",
                      "type": "string"
                    },
                    "content_type": {
                      "const": "audio/wav",
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      },
      "tags": [
        "text-to-speech",
        "tts",
        "persona-voices",
        "long-form",
        "narration",
        "audio",
        "wav"
      ]
    }
  },
  "liveness": {
    "reliability": null
  },
  "verified": false,
  "featured": false,
  "provider": {
    "host": "voice.forgemesh.io",
    "manifest_name": "voice.forgemesh.io",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-10-14T01:15:01.050Z"
  },
  "exampleResponse": {
    "example": {
      "audio": "string",
      "content_type": "string"
    },
    "type": "string"
  }
}