OpenAI gpt-4o-mini-tts

Name: OpenAI gpt-4o-mini-tts
Price: 0.001 USDC
Availability: InStock

gpt-4o-mini-tts: OpenAI GPT 4o Mini TTS text to speech, paid per call in USDC. OpenAI list $12 per 1M audio tokens (quoted at 4 per character) plus $0.6 per 1M text tokens, plus $0.0005 (Base) or $0.0005 (Solana) per call; up to 4096 characters; accepts instructions. Returns the audio bytes (mp3 by default). Rates: https://openai.mm.family/x402/pricing

InferenceLiveeip155:8453Exactvia cdp

https://openai.mm.family/x402/v1/models/gpt-4o-mini-tts/audio/speech

OpenaiTtsGpt-4oBaseSolana

Calls · 30d

2→ 0%

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 19 snapshots so far.

$0.40

Verified settled volume

238 settlements proven x402 by their on-chain EIP-3009 marker.

$0.0010

Listed price

As published in the catalog. Always read the live 402 before paying.

Calls · 30d

Upstream's own call count for this endpoint, not ours.

Unique payers · 30d

Last called 2026-10-07 18:21Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xa91238cf312440118f7dD59bA78232AcDB8Ea39b

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xa91238cf312440118f7dD59bA78232AcDB8Ea39b",
      "amount": "1000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 900
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
      },
      "payTo": "AxHVpeuSUcYwJaxkyAjGT1UvN5sHu4ZcSrW1fB1S5ZSn",
      "amount": "1000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 900
    }
  ],
  "resource": {
    "url": "https://openai.mm.family/x402/v1/models/gpt-4o-mini-tts/audio/speech",
    "tags": [
      "openai",
      "tts",
      "gpt-4o",
      "base",
      "solana"
    ],
    "iconUrl": null,
    "mimeType": "audio/mpeg",
    "description": "gpt-4o-mini-tts: OpenAI GPT 4o Mini TTS text to speech, paid per call in USDC. OpenAI list $12 per 1M audio tokens (quoted at 4 per character) plus $0.6 per 1M text tokens, plus $0.0005 (Base) or $0.0005 (Solana) per call; up to 4096 characters; accepts instructions. Returns the audio bytes (mp3 by default). Rates: https://openai.mm.family/x402/pricing",
    "serviceName": "OpenAI gpt-4o-mini-tts"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "input": "Say hello",
            "model": "gpt-4o-mini-tts",
            "voice": "alloy"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "body": "binary audio bytes (mp3 by default)",
            "content_type": "audio/mpeg"
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "type": "object",
                "required": [
                  "input",
                  "voice"
                ],
                "properties": {
                  "input": {
                    "type": "string"
                  },
                  "model": {
                    "enum": [
                      "gpt-4o-mini-tts"
                    ],
                    "type": "string"
                  },
                  "speed": {
                    "type": "number"
                  },
                  "voice": {
                    "type": "string"
                  },
                  "instructions": {
                    "type": "string"
                  },
                  "response_format": {
                    "enum": [
                      "mp3",
                      "opus",
                      "aac",
                      "flac",
                      "wav",
                      "pcm"
                    ],
                    "type": "string"
                  }
                }
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.001USDC≈ $0.001 USD

on Base · exact scheme

Pay 0.001 USDC on Base to 0xa912…Ea39b. The signed payment is good for 15 minutes.

Paid to: 0xa912…Ea39b
USD Coin contract: 0x8335…02913
Payment window: 15 minutes
As published: 1000 smallest units

1000units

on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: AxHVpe…S5ZSn
Token contract: EPjFWd…TDt1v
Payment window: 15 minutes

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xa91238cf312440118f7dD59bA78232AcDB8Ea39b",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 900
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
    },
    "payTo": "AxHVpeuSUcYwJaxkyAjGT1UvN5sHu4ZcSrW1fB1S5ZSn",
    "amount": "1000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 900
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "input": "Say hello",
          "model": "gpt-4o-mini-tts",
          "voice": "alloy"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "body": "binary audio bytes (mp3 by default)",
          "content_type": "audio/mpeg"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "type": "object",
              "required": [
                "input",
                "voice"
              ],
              "properties": {
                "input": {
                  "type": "string"
                },
                "model": {
                  "enum": [
                    "gpt-4o-mini-tts"
                  ],
                  "type": "string"
                },
                "speed": {
                  "type": "number"
                },
                "voice": {
                  "type": "string"
                },
                "instructions": {
                  "type": "string"
                },
                "response_format": {
                  "enum": [
                    "mp3",
                    "opus",
                    "aac",
                    "flac",
                    "wav",
                    "pcm"
                  ],
                  "type": "string"
                }
              }
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST",
                "PUT",
                "PATCH"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog: 2026-10-07 18:21Z
Last indexed by Roundhouse: 2026-10-14 12:10Z
Last enriched (probe, favicon, geo): 2026-10-01 22:15Z
x402 version: 2
Max timeout: 900s
Liveness probe: HTTP 402

Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 19 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md

Show the prompt

Using Roundhouse, look up the x402 service OpenAI gpt-4o-mini-tts and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=OpenAI%20gpt-4o-mini-tts'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://openai.mm.family/x402/v1/models/gpt-4o-mini-tts/audio/speech, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.