Roundhouse

Linkrra Voice

OpenAI-compatible inference for agents. Pay per call in USDC on Base—no account or API key. Dedicated GPUs, streaming responses, and model-level pricing.

MediaLiveeip155:8453Exactvia facilitator:payAI
https://pool.linkrra.com/api/billing/x402/tts
TtsText-to-speechAudioVoice
Settlements · 30d
291↓ 52%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$1.75
Verified settled volume
303 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
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
Never called
—
Upstream on-chain volume
0 transactions, checked 2026-11-05 23:45Z
Paid to
0xAA0a350f6080940c138A8A50C0Fa8c8387782eb4

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-SIGNATURE header is required — POST {\"text\": ...} with it to pay",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xAA0a350f6080940c138A8A50C0Fa8c8387782eb4",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww"
      },
      "payTo": "VXbuAtfujvaARnzCv38PehXSHA9xccXiQGHvqUBg2YN",
      "amount": "10000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 120
    }
  ],
  "resource": {
    "url": "https://pool.linkrra.com/api/billing/x402/tts",
    "tags": [
      "tts",
      "text-to-speech",
      "audio",
      "voice"
    ],
    "mimeType": "audio/wav",
    "description": "Linkrra Voice — text-to-speech with WAV output and automatic Hebrew nikud. Pay per call in USDC on any network offered in the payment challenge; no account or API key. From $0.01 per call.",
    "serviceName": "Linkrra Voice"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "text": "Hello from Linkrra.",
            "nikud": false,
            "sampleRate": 24000
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "binary",
          "example": "<WAV file bytes>",
          "mimeType": "audio/wav"
        }
      },
      "schema": {
        "type": "object",
        "required": [
          "input",
          "output"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "type": "object"
              },
              "type": {
                "type": "string"
              },
              "method": {
                "type": "string"
              },
              "bodyType": {
                "type": "string"
              }
            }
          },
          "output": {
            "type": "object",
            "required": [
              "type",
              "mimeType"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "mimeType": {
                "type": "string"
              }
            }
          }
        }
      },
      "pricing": {
        "note": "this quote used the standard rate",
        "nikudPerMillionCharsUsd": 150,
        "standardPerMillionCharsUsd": 10
      }
    },
    "builder-code": {
      "info": {
        "a": "bc_66yn2s8l"
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "a": {
            "type": "string",
            "pattern": "^[a-z0-9_]{1,32}$",
            "description": "App builder code"
          },
          "s": {
            "type": "array",
            "items": {
              "type": "string",
              "pattern": "^[a-z0-9_]{1,32}$"
            },
            "maxItems": 11,
            "description": "Service builder codes"
          },
          "w": {
            "type": "string",
            "pattern": "^[a-z0-9_]{1,32}$",
            "description": "Wallet builder code"
          }
        },
        "additionalProperties": false
      }
    }
  },
  "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.

0.01USDC≈ $0.01 USD
on Base · exact scheme

Pay 0.01 USDC on Base to 0xAA0a…82eb4. The signed payment is good for 2 minutes.

Paid to
0xAA0a…82eb4
USD Coin contract
0x8335…02913
Payment window
2 minutes
As published
10000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xAA0a350f6080940c138A8A50C0Fa8c8387782eb4",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 120
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "text": "Hello from Linkrra.",
          "nikud": false,
          "sampleRate": 24000
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "binary",
        "example": "<WAV file bytes>",
        "mimeType": "audio/wav"
      }
    },
    "schema": {
      "type": "object",
      "required": [
        "input",
        "output"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "type": "object"
            },
            "type": {
              "type": "string"
            },
            "method": {
              "type": "string"
            },
            "bodyType": {
              "type": "string"
            }
          }
        },
        "output": {
          "type": "object",
          "required": [
            "type",
            "mimeType"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "mimeType": {
              "type": "string"
            }
          }
        }
      }
    },
    "pricing": {
      "note": "this quote used the standard rate",
      "nikudPerMillionCharsUsd": 150,
      "standardPerMillionCharsUsd": 10
    }
  }
}

Provenance

Seen in the source catalog
2026-11-05 22:58Z
Last indexed by Roundhouse
2026-11-11 18:46Z
Last enriched (probe, favicon, geo)
2026-11-05 23:45Z
x402 version
2
Max timeout
120s
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

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. 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 Linkrra Voice 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=Linkrra%20Voice'
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://pool.linkrra.com/api/billing/x402/tts, 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.