Roundhouse

SingIt Ask

SingIt Ask: Ask a language model without an API key: any model listed at GET /v1/models (Claude, GPT, Gemini, Grok, DeepSeek, Qwen and more; default deepseek-v4.1-flash). OpenAI chat-completions request. Pays actual token cost + 30% + a settlement fee (0.001 USDC on Base, 0.002 on Solana), up to a ceiling that follows the model's price; nothing is charged without an answer. Exact payers are instead charged that ceiling flat, with no metering.

SearchLiveeip155:8453Uptovia cdp
https://ask.singitai.app/v1/chat/completions
LlmChatOpenai-compatibleInferenceClaude
Calls · 30d
3
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far.
$1.05
Verified settled volume
10 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0030
Listed price
As published in the catalog. Always read the live 402 before paying.
4
Calls · 30d
Upstream's own call count for this endpoint, not ours.
3
Unique payers · 30d
Last called 2026-10-22 09:44Z
—
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.

3000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · upto 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
5 minutes
0.003USDC≈ $0.003 USD
on Base · upto scheme

Pay 0.003 USDC on Base to 0xC23d…68B4e. The signed payment is good for 2 minutes.

Paid to
0xC23d…68B4e
USD Coin contract
0x8335…02913
Payment window
2 minutes
As published
3000 smallest units
3000units
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
5 minutes
0.003USDC≈ $0.003 USD
on Base · exact scheme

Pay 0.003 USDC on Base to 0xC23d…68B4e. The signed payment is good for 2 minutes.

Paid to
0xC23d…68B4e
USD Coin contract
0x8335…02913
Payment window
2 minutes
As published
3000 smallest units
The catalog’s raw entry
[
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "billing": {
        "mode": "actual_usage",
        "version": 1,
        "markupBps": 3000,
        "maxChargeAtomic": "3000",
        "settlementFeeAtomic": "2000"
      },
      "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
      "paymentFlow": "escrow",
      "tokenProgram": "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA",
      "withdrawDelay": 300,
      "receiverAuthorizer": "9dpHxn3XFZMZv59vE5MKxhfwGUCCgkcCUzYZLpdEm7ox"
    },
    "payTo": "4an2sqamWWhny9mjLsMtGXCDXakeNtg6vSLq4QvhdmQu",
    "amount": "3000",
    "scheme": "upto",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "billing": {
        "mode": "actual_usage",
        "version": 1,
        "markupBps": 3000,
        "maxChargeAtomic": "3000",
        "settlementFeeAtomic": "1000"
      },
      "version": "2",
      "facilitatorAddress": "0x4c934c63C786157Fefd990945b25eA60a0FB0205",
      "assetTransferMethod": "permit2"
    },
    "payTo": "0xC23d1Dc0f5fCe1abfFB051e06cB93f0329968B4e",
    "amount": "3000",
    "scheme": "upto",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 120
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "billing": {
        "mode": "exact_ceiling",
        "version": 1,
        "markupBps": 3000,
        "maxChargeAtomic": "3000",
        "settlementFeeAtomic": "2000"
      },
      "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
    },
    "payTo": "4an2sqamWWhny9mjLsMtGXCDXakeNtg6vSLq4QvhdmQu",
    "amount": "3000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "billing": {
        "mode": "exact_ceiling",
        "version": 1,
        "markupBps": 3000,
        "maxChargeAtomic": "3000",
        "settlementFeeAtomic": "1000"
      },
      "version": "2"
    },
    "payTo": "0xC23d1Dc0f5fCe1abfFB051e06cB93f0329968B4e",
    "amount": "3000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 120
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "messages": [
            {
              "role": "user",
              "content": "Where is good coffee near the Colosseum?"
            }
          ],
          "max_tokens": 400
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "id": "singit-ask-1791932400000",
          "model": "singit-ask",
          "usage": {
            "total_tokens": 45,
            "prompt_tokens": 14,
            "buyer_cost_micro": 6,
            "completion_tokens": 31
          },
          "object": "chat.completion",
          "billing": {
            "mode": "actual_usage",
            "version": 1,
            "currency": "USDC",
            "markupBps": 3000,
            "totalAtomic": "1008",
            "markupAtomic": "2",
            "maxChargeAtomic": "3000",
            "providerCostAtomic": "6",
            "settlementFeeAtomic": "1000"
          },
          "choices": [
            {
              "index": 0,
              "message": {
                "role": "assistant",
                "content": "Around the Colosseum, try Caffè Propaganda on Via Claudia or Bar Martini for an espresso with a view."
              },
              "finish_reason": "stop"
            }
          ],
          "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": [
                "messages"
              ],
              "properties": {
                "model": {
                  "type": "string",
                  "examples": [
                    "deepseek-v4.1-flash",
                    "claude-opus-5.5",
                    "gpt-5.5",
                    "gemini-3.1-pro"
                  ],
                  "description": "Any model id from GET /v1/models; the ceiling follows its price. Omit for the default model."
                },
                "stream": {
                  "enum": [
                    false
                  ],
                  "type": "boolean",
                  "description": "Streaming is not offered."
                },
                "messages": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "required": [
                      "role",
                      "content"
                    ],
                    "properties": {
                      "role": {
                        "enum": [
                          "system",
                          "user",
                          "assistant"
                        ],
                        "type": "string"
                      },
                      "content": {
                        "type": "string",
                        "description": "Plain text; all messages together under 24000 characters."
                      }
                    }
                  },
                  "maxItems": 40,
                  "minItems": 1,
                  "description": "The conversation, oldest first."
                },
                "max_tokens": {
                  "type": "integer",
                  "default": 800,
                  "maximum": 1200,
                  "minimum": 1,
                  "description": "The longest answer, in tokens. The payment ceiling grows with it; the charge follows what was used."
                }
              }
            },
            "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": [
                "choices",
                "billing"
              ],
              "properties": {
                "id": {
                  "type": "string"
                },
                "model": {
                  "type": "string"
                },
                "usage": {
                  "type": "object",
                  "description": "Token counts and the model's own cost in micro-USD (buyer_cost_micro)"
                },
                "object": {
                  "type": "string",
                  "const": "chat.completion"
                },
                "billing": {
                  "type": "object",
                  "properties": {
                    "currency": {
                      "type": "string",
                      "const": "USDC"
                    },
                    "totalAtomic": {
                      "type": "string",
                      "description": "The amount settled"
                    },
                    "markupAtomic": {
                      "type": "string"
                    },
                    "providerCostAtomic": {
                      "type": "string"
                    }
                  },
                  "description": "What was charged, in USDC micro-units"
                },
                "choices": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "properties": {
                      "index": {
                        "type": "integer"
                      },
                      "message": {
                        "type": "object",
                        "properties": {
                          "role": {
                            "type": "string"
                          },
                          "content": {
                            "type": "string"
                          }
                        }
                      },
                      "finish_reason": {
                        "type": "string",
                        "description": "stop, or length when max_tokens ended the answer"
                      }
                    }
                  }
                },
                "created": {
                  "type": "integer",
                  "description": "Unix seconds"
                }
              }
            }
          }
        }
      }
    }
  },
  "eip2612GasSponsoring": {
    "info": {
      "version": "1",
      "description": "The facilitator accepts EIP-2612 gasless Permit to `Permit2` canonical contract."
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "from",
        "asset",
        "spender",
        "amount",
        "nonce",
        "deadline",
        "signature",
        "version"
      ],
      "properties": {
        "from": {
          "type": "string",
          "pattern": "^0x[a-fA-F0-9]{40}$",
          "description": "The address of the sender."
        },
        "asset": {
          "type": "string",
          "pattern": "^0x[a-fA-F0-9]{40}$",
          "description": "The address of the ERC-20 token contract."
        },
        "nonce": {
          "type": "string",
          "pattern": "^[0-9]+$",
          "description": "The current nonce of the sender."
        },
        "amount": {
          "type": "string",
          "pattern": "^[0-9]+$",
          "description": "The amount to approve (uint256). Typically MaxUint."
        },
        "spender": {
          "type": "string",
          "pattern": "^0x[a-fA-F0-9]{40}$",
          "description": "The address of the spender (Canonical Permit2)."
        },
        "version": {
          "type": "string",
          "pattern": "^[0-9]+(\\.[0-9]+)*$",
          "description": "Schema version identifier."
        },
        "deadline": {
          "type": "string",
          "pattern": "^[0-9]+$",
          "description": "The timestamp at which the signature expires."
        },
        "signature": {
          "type": "string",
          "pattern": "^0x[a-fA-F0-9]+$",
          "description": "The 65-byte concatenated signature (r, s, v) as a hex string."
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-22 09:44Z
Last indexed by Roundhouse
2026-10-23 16:10Z
Last enriched (probe, favicon, geo)
2026-10-14 03:46Z
x402 version
2
Max timeout
120s
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 Ask 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%20Ask'
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/chat/completions, 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.