Roundhouse AI

api.cortexcloud.org

Chat completion via OpenRouter (Gemini/OpenAI). x402-paid, USDC on Base. Price quoted from requested max_tokens + estimated input.

InferenceLiveeip155:8453Exactvia cdp
https://api.cortexcloud.org/v1/ai/chat
Calls · 30d
2→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 3 snapshots so far.
$9.61
Verified settled volume
186 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0040
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-21 22:36Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x5a0353bc9c75b893a9b5735d3e79f1bd988ea143

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.

{
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x5a0353bc9c75b893a9b5735d3e79f1bd988ea143",
      "amount": "4000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 60
    }
  ],
  "resource": {
    "url": "https://api.cortexcloud.org/v1/ai/chat",
    "mimeType": "application/json",
    "description": "Chat completion via OpenRouter (Gemini/OpenAI). x402-paid, USDC on Base. Price quoted from requested max_tokens + estimated input."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "model": "gemini-2.5-flash",
            "messages": [
              {
                "role": "user",
                "content": "Summarize quantum annealing in one sentence."
              }
            ],
            "max_tokens": 128
          },
          "type": "http",
          "method": "GET",
          "bodyType": "json"
        },
        "output": {
          "type": "object",
          "format": "application/json",
          "example": {
            "id": "chatcmpl-...",
            "model": "openrouter/gemini-2.5-flash",
            "usage": {
              "prompt_tokens": 12,
              "completion_tokens": 48
            },
            "choices": [
              {
                "message": {
                  "role": "assistant",
                  "content": "..."
                }
              }
            ],
            "price_usd": 0.0082
          }
        }
      },
      "schema": {
        "properties": {
          "input": {
            "properties": {
              "body": {
                "type": "object",
                "required": [
                  "messages"
                ],
                "properties": {
                  "model": {
                    "enum": [
                      "gemini-2.5-flash",
                      "gemini-2.0-flash",
                      "gpt-4o-mini"
                    ],
                    "type": "string",
                    "default": "gemini-2.5-flash"
                  },
                  "messages": {
                    "type": "array",
                    "items": {
                      "type": "object"
                    },
                    "minItems": 1
                  },
                  "max_tokens": {
                    "type": "integer",
                    "default": 512,
                    "maximum": 8192,
                    "minimum": 1
                  },
                  "temperature": {
                    "type": "number",
                    "default": 0.7,
                    "maximum": 2,
                    "minimum": 0
                  }
                }
              }
            }
          },
          "output": {
            "properties": {
              "example": {
                "id": "chatcmpl-...",
                "model": "openrouter/gemini-2.5-flash",
                "usage": {
                  "prompt_tokens": 12,
                  "completion_tokens": 48
                },
                "choices": [
                  {
                    "message": {
                      "role": "assistant",
                      "content": "..."
                    }
                  }
                ],
                "price_usd": 0.0082
              }
            }
          }
        }
      },
      "discoverable": true
    }
  },
  "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.

0.004USDC≈ $0.004 USD
on Base · exact scheme

Pay 0.004 USDC on Base to 0x5a03…ea143. The signed payment is good for 1 minute.

Paid to
0x5a03…ea143
USD Coin contract
0x8335…02913
Payment window
1 minute
As published
4000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x5a0353bc9c75b893a9b5735d3e79f1bd988ea143",
    "amount": "4000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "model": "gemini-2.5-flash",
          "messages": [
            {
              "role": "user",
              "content": "Summarize quantum annealing in one sentence."
            }
          ],
          "max_tokens": 128
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "object",
        "format": "application/json",
        "example": {
          "id": "chatcmpl-...",
          "model": "openrouter/gemini-2.5-flash",
          "usage": {
            "prompt_tokens": 12,
            "completion_tokens": 48
          },
          "choices": [
            {
              "message": {
                "role": "assistant",
                "content": "..."
              }
            }
          ],
          "price_usd": 0.0082
        }
      }
    },
    "schema": {
      "properties": {
        "input": {
          "properties": {
            "body": {
              "type": "object",
              "required": [
                "messages"
              ],
              "properties": {
                "model": {
                  "enum": [
                    "gemini-2.5-flash",
                    "gemini-2.0-flash",
                    "gpt-4o-mini"
                  ],
                  "type": "string",
                  "default": "gemini-2.5-flash"
                },
                "messages": {
                  "type": "array",
                  "items": {
                    "type": "object"
                  },
                  "minItems": 1
                },
                "max_tokens": {
                  "type": "integer",
                  "default": 512,
                  "maximum": 8192,
                  "minimum": 1
                },
                "temperature": {
                  "type": "number",
                  "default": 0.7,
                  "maximum": 2,
                  "minimum": 0
                }
              }
            }
          }
        },
        "output": {
          "properties": {
            "example": {
              "id": "chatcmpl-...",
              "model": "openrouter/gemini-2.5-flash",
              "usage": {
                "prompt_tokens": 12,
                "completion_tokens": 48
              },
              "choices": [
                {
                  "message": {
                    "role": "assistant",
                    "content": "..."
                  }
                }
              ],
              "price_usd": 0.0082
            }
          }
        }
      }
    },
    "discoverable": true
  }
}

Provenance

Seen in the source catalog
2026-08-21 22:35Z
Last indexed by Roundhouse
2026-08-26 12:40Z
Last enriched (probe, favicon, geo)
2026-09-24 00:15Z
x402 version
2
Max timeout
60s
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. 3 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 api.cortexcloud.org 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=api.cortexcloud.org'
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.cortexcloud.org/v1/ai/chat, 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.