Roundhouse

Kokoro TTS for Agents

Delx is an independent technology studio building agent continuity, personal-state infrastructure, and focused software.

InferenceLiveeip155:8453Exactvia cdp
https://api.delx.ai/api/v1/x402/speech
x402Text-to-speechTtsVoice-generationKokoro
Calls · 30d
223→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 23 snapshots so far.
$14.90
Verified settled volume
2,751 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0020
Listed price
As published in the catalog. Always read the live 402 before paying.
223
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-27 11:15Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x9f8bd9875b3E0b632a24A3A7C73f7787175e73A2

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

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider
Coming soonCHAOS AgentERC-8004

Accepts

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

0.002USDC≈ $0.002 USD
on Base · exact scheme

Pay 0.002 USDC on Base to 0x9f8b…e73A2. The signed payment is good for 5 minutes.

Paid to
0x9f8b…e73A2
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
2000 smallest units
Buys
Delx Commerce text to speech API for agents at $0.002 USDC. Call when you need short narration, voiceover, IVR prompts, or notification clips without a TTS subscription. Kokoro WAV + SHA-256 via x402 on Base. Accepts native `text` or OpenAI-shaped `input`/`voice`/`speed` (up to 500 characters). Not a phone carrier or realtime voice session.
Returns
application/json
0.002USDC≈ $0.002 USD
on Base · exact scheme

Pay 0.002 USDC on Base to 0x9f8b…e73A2. The signed payment is good for 5 minutes.

Paid to
0x9f8b…e73A2
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
2000 smallest units
Buys
Delx Commerce text to speech API for agents at $0.002 USDC. Call when you need short narration, voiceover, IVR prompts, or notification clips without a TTS subscription. Kokoro WAV + SHA-256 via x402 on Base. Accepts native `text` or OpenAI-shaped `input`/`voice`/`speed` (up to 500 characters). Not a phone carrier or realtime voice session.
Returns
application/json
2000units
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
28heAM…YsemG
Token contract
EPjFWd…TDt1v
Payment window
5 minutes
Buys
Delx Commerce text to speech API for agents at $0.002 USDC. Call when you need short narration, voiceover, IVR prompts, or notification clips without a TTS subscription. Kokoro WAV + SHA-256 via x402 on Base. Accepts native `text` or OpenAI-shaped `input`/`voice`/`speed` (up to 500 characters). Not a phone carrier or realtime voice session.
Returns
application/json
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "app": "Delx Commerce",
      "name": "USD Coin",
      "version": "2",
      "provider": "coinbase",
      "erc8004_id": "14340",
      "accept_label": "Coinbase CDP",
      "provider_label": "Coinbase CDP",
      "facilitator_url": "https://api.cdp.coinbase.com/platform/v2/x402"
    },
    "payTo": "0x9f8bd9875b3E0b632a24A3A7C73f7787175e73A2",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://api.delx.ai/api/v1/x402/speech",
    "description": "Delx Commerce text to speech API for agents at $0.002 USDC. Call when you need short narration, voiceover, IVR prompts, or notification clips without a TTS subscription. Kokoro WAV + SHA-256 via x402 on Base. Accepts native `text` or OpenAI-shaped `input`/`voice`/`speed` (up to 500 characters). Not a phone carrier or realtime voice session.",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "app": "Delx Commerce",
      "name": "USD Coin",
      "version": "2",
      "provider": "payai",
      "erc8004_id": "14340",
      "accept_label": "PayAI Base",
      "provider_label": "PayAI Base",
      "facilitator_url": "https://facilitator.payai.network"
    },
    "payTo": "0x9f8bd9875b3E0b632a24A3A7C73f7787175e73A2",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://api.delx.ai/api/v1/x402/speech",
    "description": "Delx Commerce text to speech API for agents at $0.002 USDC. Call when you need short narration, voiceover, IVR prompts, or notification clips without a TTS subscription. Kokoro WAV + SHA-256 via x402 on Base. Accepts native `text` or OpenAI-shaped `input`/`voice`/`speed` (up to 500 characters). Not a phone carrier or realtime voice session.",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "app": "Delx Commerce",
      "name": "USD Coin",
      "version": "2",
      "feePayer": "2wKupLR9q6wXYppw8Gr2NvWxKBUqm4PPJKkQfoxHDBg4",
      "provider": "payai",
      "erc8004_id": "14340",
      "accept_label": "PayAI Solana",
      "provider_label": "PayAI Solana",
      "facilitator_url": "https://facilitator.payai.network"
    },
    "payTo": "28heAMpFkeUJsL7o7apiK4oJwZWq2fUHinRwbgYYsemG",
    "amount": "2000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "mimeType": "application/json",
    "resource": "https://api.delx.ai/api/v1/x402/speech",
    "description": "Delx Commerce text to speech API for agents at $0.002 USDC. Call when you need short narration, voiceover, IVR prompts, or notification clips without a TTS subscription. Kokoro WAV + SHA-256 via x402 on Base. Accepts native `text` or OpenAI-shaped `input`/`voice`/`speed` (up to 500 characters). Not a phone carrier or realtime voice session.",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "input": "Your agent task is complete.",
          "model": "tts-1",
          "speed": 1,
          "voice": "alloy",
          "response_format": "wav"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "bytes": 48128,
          "model": "jaaari/kokoro-82m",
          "speed": 1,
          "voice": "af_bella",
          "sha256": "cb45a6e6fa30b28b791a6256f9f522f13fc9c6de5b407030bd853cab62523d63",
          "channels": 1,
          "provider": "replicate",
          "audio_url": "https://api.delx.ai/api/v1/generated-audio/0de6f22023df47f4a96c260bd980257a.wav",
          "media_type": "audio/wav",
          "duration_ms": 1000,
          "generation_id": "0de6f22023df47f4a96c260bd980257a",
          "sample_rate_hz": 24000,
          "sale_price_usdc": 0.002,
          "provider_attempts": 1,
          "sample_width_bits": 16,
          "prompt_policy_version": "raw/v1"
        }
      }
    },
    "tags": [
      "x402",
      "text-to-speech",
      "tts",
      "voice-generation",
      "kokoro",
      "commercial-use",
      "audio",
      "agent",
      "openai-compatible-input",
      "voice-synthesis",
      "narration",
      "voiceover",
      "speech-audio",
      "delx",
      "delx-commerce",
      "agentcash",
      "micro-usdc",
      "pay-per-call"
    ],
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input",
        "output"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "type": "object",
              "anyOf": [
                {
                  "required": [
                    "text"
                  ]
                },
                {
                  "required": [
                    "input"
                  ]
                }
              ],
              "properties": {
                "text": {
                  "type": "string",
                  "maxLength": 500,
                  "minLength": 1,
                  "description": "Text to synthesize into a short speech clip."
                },
                "input": {
                  "type": "string",
                  "maxLength": 500,
                  "minLength": 1,
                  "description": "OpenAI-compatible alias for `text`."
                },
                "model": {
                  "enum": [
                    "kokoro",
                    "kokoro-82m",
                    "tts-1"
                  ],
                  "type": "string",
                  "default": "kokoro",
                  "description": "`tts-1` is accepted as a compatibility alias; delivery uses Kokoro 82M."
                },
                "speed": {
                  "type": "number",
                  "default": 1,
                  "maximum": 2,
                  "minimum": 0.5
                },
                "voice": {
                  "enum": [
                    "af_bella",
                    "af_nicole",
                    "af_sarah",
                    "am_fenrir",
                    "am_michael",
                    "bf_emma",
                    "bm_george",
                    "ff_siwis",
                    "hf_alpha",
                    "hm_omega",
                    "alloy",
                    "echo",
                    "fable",
                    "onyx",
                    "nova",
                    "shimmer"
                  ],
                  "type": "string",
                  "default": "af_bella"
                },
                "response_format": {
                  "enum": [
                    "wav"
                  ],
                  "type": "string",
                  "default": "wav",
                  "description": "The hosted result is currently delivered as WAV."
                }
              },
              "additionalProperties": false
            },
            "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",
            "example"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "json"
            },
            "example": {
              "bytes": 48128,
              "model": "jaaari/kokoro-82m",
              "speed": 1,
              "voice": "af_bella",
              "sha256": "cb45a6e6fa30b28b791a6256f9f522f13fc9c6de5b407030bd853cab62523d63",
              "channels": 1,
              "provider": "replicate",
              "audio_url": "https://api.delx.ai/api/v1/generated-audio/0de6f22023df47f4a96c260bd980257a.wav",
              "media_type": "audio/wav",
              "duration_ms": 1000,
              "generation_id": "0de6f22023df47f4a96c260bd980257a",
              "sample_rate_hz": 24000,
              "sale_price_usdc": 0.002,
              "provider_attempts": 1,
              "sample_width_bits": 16,
              "prompt_policy_version": "raw/v1"
            }
          }
        }
      }
    },
    "summary": "Delx Commerce text to speech API for agents at $0.002 USDC. Call when you need short narration, voiceover, IVR prompts, or notification clips without a TTS subscription. Kokoro WAV + SHA-256 via x402 on Base. Accepts native `text` or OpenAI-shaped `input`/`voice`/`speed` (up to 500 characters). Not a phone carrier or realtime voice session.",
    "category": "audio",
    "serviceName": "Kokoro TTS for Agents"
  }
}

Provenance

Seen in the source catalog
2026-08-27 11:14Z
Last indexed by Roundhouse
2026-09-07 00:50Z
Last enriched (probe, favicon, geo)
2026-09-12 19:15Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 404
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. 23 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 Kokoro TTS for Agents 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=Kokoro%20TTS%20for%20Agents'
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://api.delx.ai/api/v1/x402/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. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

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