Api Endpoint

Text-to-speech

OpenAI-compatible text-to-speech over x402 - point any OpenAI SDK's audio.speech.create() at base_url https://agent402.tools/v1 and pay $0.06 per call in USDC, no API key, no signup. Served by Voxtral Mini TTS behind a five-model failover chain (xAI Grok Voice, Kokoro, MAI-Voice-2 Flash, MAI-Voice-2), every link proven by a real paid canary - a provider outage never becomes your failure. Up to 2,000 chars in, raw mp3 (default) or pcm bytes out - the same wire shape as OpenAI's endpoint.

Open interactive test console

Offering

Provider: agent402.tools
Method: POST
Offering type: Api Endpoint
Transport type: http
Category: Creative
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://agent402.tools/v1/audio/speech
MIME type: application/json
First seen: 2026-10-16T01:51:20.002Z
Last seen: 2026-11-03T09:48:18.331Z
Tags: LLM, tts, text-to-speech, speech, audio

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.06 USDC
Atomic price: 60000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2: 0.06 USDC
Atomic price: 60000 · Network: eip155:137 · Asset: USDC · Scheme: exact
Payment option 3: 0.06 USDC
Atomic price: 60000 · Network: eip155:42161 · Asset: USDC · Scheme: exact
Payment option 4: 0.06 USDC
Atomic price: 60000 · Network: eip155:143 · Asset: USDC · Scheme: exact
Payment option 5: 0.06 USDC
Atomic price: 60000 · Network: eip155:43114 · Asset: USDC · Scheme: exact
Payment option 6: 60000 atomic units
Atomic price: 60000 · Network: eip155:1329 · Asset: 0xe15fC38F6D8c56aF07bbCBe3BAf5708A2Bf42392 · Scheme: exact
Payment option 7: 0.061 USDC
Atomic price: 61000 · Network: eip155:10 · Asset: USDC · Scheme: exact
Payment option 8: 0.06 USDC
Atomic price: 60000 · Network: eip155:4663 · Asset: USDC · Scheme: exact
Payment option 9: 60000 atomic units
Atomic price: 60000 · Network: eip155:42220 · Asset: 0xcebA9300f2b948710d2653dD7B07f33A8B32118C · Scheme: exact
Payment option 10: 60000 atomic units
Atomic price: 60000 · Network: eip155:5042 · Asset: 0x3600000000000000000000000000000000000000 · Scheme: exact
Payment option 11: 0.06 USDC
Atomic price: 60000 · Network: eip155:8453 · Asset: USDC · Scheme: upto
Payment option 12: 0.06 USDC
Atomic price: 60000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact
Payment option 13: 600000 atomic units
Atomic price: 600000 · Network: stellar:pubnet · Asset: CCW67TSZV3SSS2HXMBQ5JFGCKJNXKZM7UQUWUZPUTHXSTZLEO7SJMI75 · Scheme: exact
Payment option 14: 60000 atomic units
Atomic price: 60000 · Network: algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73k · Asset: 31566704 · Scheme: exact
Payment option 15: 0.06 USDC
Atomic price: 60000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 16: 60000 atomic units
Atomic price: 60000 · Network: eip155:5042 · Asset: 0x3600000000000000000000000000000000000000 · Scheme: exact

Raw x402 terms

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    "payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0"
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
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    "payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0"
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    "scheme": "exact",
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  },
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    "scheme": "exact",
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    "amount": "60000",
    "payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0"
  },
  {
    "scheme": "exact",
    "network": "eip155:43114",
    "asset": "0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E",
    "amount": "60000",
    "payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0"
  },
  {
    "scheme": "exact",
    "network": "eip155:1329",
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    "payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0"
  },
  {
    "scheme": "exact",
    "network": "eip155:10",
    "asset": "0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85",
    "amount": "61000",
    "payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0"
  },
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    "scheme": "exact",
    "network": "eip155:4663",
    "asset": "0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168",
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    "amount": "60000",
    "payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "60000",
    "payTo": "J7aN3PLJnTCF5qpEnvJHJsnCjcGuqC2rYtEM8Gv3xwg"
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  {
    "scheme": "exact",
    "network": "stellar:pubnet",
    "asset": "CCW67TSZV3SSS2HXMBQ5JFGCKJNXKZM7UQUWUZPUTHXSTZLEO7SJMI75",
    "amount": "600000",
    "payTo": "GDNJXCKW7ZM7GEEVP674TWPU26YJNBQ2FI4ZIPRKTPTNUEJMDHFJWWRL"
  },
  {
    "scheme": "exact",
    "network": "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73k",
    "asset": "31566704",
    "amount": "60000",
    "payTo": "C7IIHG7SPLPZ5H7ZT6HW3UV2OQMQQE6Y2HBNGZXSLRJULE42BEE2OY2XIE"
  },
  {
    "scheme": "exact",
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    "amount": "60000",
    "payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0"
  },
  {
    "scheme": "exact",
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    "amount": "60000",
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]

Observed health

Status: Healthy
Latest latency: 217 ms
Average latency: 154 ms
HTTP status: 204
Last checked: 2026-11-04T22:50:12.582Z
Reachability: 100% over 5 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "POST"
      ]
    },
    "bodyType": {
      "type": "string",
      "enum": [
        "json",
        "form-data",
        "text"
      ]
    },
    "body": {
      "properties": {
        "input": {
          "type": "string"
        },
        "voice": {
          "type": "string"
        },
        "response_format": {
          "type": "string"
        },
        "model": {
          "type": "string"
        },
        "speed": {
          "type": "number"
        },
        "zdr": {
          "type": "boolean"
        }
      },
      "required": [
        "input"
      ]
    }
  },
  "required": [
    "type",
    "method",
    "bodyType",
    "body"
  ],
  "additionalProperties": false
}

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "body": {
          "properties": {
            "input": {
              "description": "Text to speak (up to 2,000 chars)",
              "type": "string"
            },
            "model": {
              "description": "Optional - pin a chain model (e.g. mistralai/voxtral-mini-tts-2603); the rest stay as fallbacks",
              "type": "string"
            },
            "response_format": {
              "description": "\"mp3\" (default) or \"pcm\"",
              "type": "string"
            },
            "speed": {
              "description": "Optional 0.25–4 playback speed (providers that don't support it ignore it)",
              "type": "number"
            },
            "voice": {
              "description": "OpenAI voice name - alloy (default), ash, ballad, coral, echo, fable, onyx, nova, sage, shimmer, verse - or a native voice id from GET /v1/models (e.g. en_paul_cheerful)",
              "type": "string"
            },
            "zdr": {
              "description": "Optional - true routes only to zero-data-retention providers",
              "type": "boolean"
            }
          },
          "required": [
            "input"
          ]
        },
        "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": {
          "type": "string"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}