Roundhouse

SingIt Image Generation

OpenAI-compatible text-to-image API. Pay per call in USDC on Base or Solana, no API key. Models: GET /v1/catalog.

InferenceLiveeip155:8453Exactvia cdp
https://ask.singitai.app/v1/images/generations
Image-generationImageFlux.2-flexGemini-2.5-flash-imageGpt-5-image
Calls · 30d
7↑ 59%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far.
$2.25
Verified settled volume
321 settlements proven x402 by their on-chain EIP-3009 marker.
$0.066
Listed price
As published in the catalog. Always read the live 402 before paying.
7
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-11-09 19:40Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xC23d1Dc0f5fCe1abfFB051e06cB93f0329968B4e

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.

Accepts

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

0.066USDC≈ $0.066 USD
on Base · exact scheme

Pay 0.066 USDC on Base to 0xC23d…68B4e. The signed payment is good for 3 minutes.

Paid to
0xC23d…68B4e
USD Coin contract
0x8335…02913
Payment window
3 minutes
As published
66000 smallest units
67000units
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
4an2sq…hdmQu
Token contract
EPjFWd…TDt1v
Payment window
3 minutes
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xC23d1Dc0f5fCe1abfFB051e06cB93f0329968B4e",
    "amount": "66000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 180
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"
    },
    "payTo": "4an2sqamWWhny9mjLsMtGXCDXakeNtg6vSLq4QvhdmQu",
    "amount": "67000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 180
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "n": 1,
          "size": "1024x1024",
          "model": "venice-seedream-v5-lite",
          "prompt": "a small green robot holding a coin, flat illustration"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "data": [
            {
              "b64_json": "iVBORw0KGgoAAAANSUhEUgAA…"
            }
          ],
          "model": "venice-seedream-v5-lite",
          "billing": {
            "currency": "USDC",
            "feeAtomic": "1000",
            "listAtomic": "10000",
            "totalAtomic": "14000",
            "markupAtomic": "3000"
          },
          "created": 1791932400
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "required": [
                "model",
                "prompt"
              ],
              "properties": {
                "n": {
                  "type": "integer",
                  "default": 1,
                  "maximum": 4,
                  "minimum": 1,
                  "description": "How many images; the price is per image."
                },
                "size": {
                  "type": "string",
                  "pattern": "^[1-9][0-9]{2,3}x[1-9][0-9]{2,3}$",
                  "examples": [
                    "1024x1024"
                  ],
                  "description": "WIDTHxHEIGHT; the sizes each model takes are listed at GET /v1/images/models."
                },
                "model": {
                  "type": "string",
                  "examples": [
                    "venice-seedream-v5-lite"
                  ],
                  "description": "An image model id from GET /v1/images/models."
                },
                "style": {
                  "type": "string",
                  "maxLength": 40,
                  "description": "Only for models that take it."
                },
                "prompt": {
                  "type": "string",
                  "maxLength": 4000,
                  "minLength": 1,
                  "description": "What to draw."
                },
                "quality": {
                  "type": "string",
                  "maxLength": 40,
                  "description": "Only for models that take it."
                },
                "response_format": {
                  "enum": [
                    "b64_json",
                    "url"
                  ],
                  "type": "string",
                  "description": "How the image comes back."
                }
              }
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "data",
                "billing"
              ],
              "properties": {
                "data": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "properties": {
                      "url": {
                        "type": "string",
                        "description": "Or a link to it"
                      },
                      "b64_json": {
                        "type": "string",
                        "description": "The image, base64"
                      }
                    }
                  }
                },
                "model": {
                  "type": "string"
                },
                "billing": {
                  "type": "object",
                  "properties": {
                    "currency": {
                      "type": "string",
                      "const": "USDC"
                    },
                    "feeAtomic": {
                      "type": "string"
                    },
                    "listAtomic": {
                      "type": "string"
                    },
                    "totalAtomic": {
                      "type": "string",
                      "description": "The amount settled"
                    },
                    "markupAtomic": {
                      "type": "string"
                    }
                  },
                  "description": "What was charged, in USDC micro-units"
                },
                "created": {
                  "type": "integer",
                  "description": "Unix seconds"
                }
              }
            }
          }
        }
      }
    }
  },
  "builder-code": {
    "info": {
      "a": "bc_is3fuv36"
    },
    "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
    }
  }
}

Provenance

Seen in the source catalog
2026-11-09 19:40Z
Last indexed by Roundhouse
2026-11-10 23:00Z
Last enriched (probe, favicon, geo)
2026-10-16 21:45Z
x402 version
2
Max timeout
180s
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. 32 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 SingIt Image Generation 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=SingIt%20Image%20Generation'
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://ask.singitai.app/v1/images/generations, 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.