AI Inference · x402 · early usage

SingIt Ask: Ask a language model without an API key: any model listed at GET /v1/models…

by ask.singitai.app · discovered, not yet claimed by its owner · updated 2026-10-13

30d calls2

30d payers1

MethodPOST

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

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.

Tags: llm · chat · openai-compatible · inference · claude · bazaar · eip2612GasSponsoring

Call contract

Method: POST
Input: json
Output: json
Last paid call: 2026-10-13

Input example from Bazaar metadata

{
  "max_tokens": 400,
  "messages": [
    {
      "content": "Where is good coffee near the Colosseum?",
      "role": "user"
    }
  ]
}

Output example

{
  "billing": {
    "currency": "USDC",
    "markupAtomic": "2",
    "markupBps": 3000,
    "maxChargeAtomic": "3000",
    "mode": "actual_usage",
    "providerCostAtomic": "6",
    "settlementFeeAtomic": "1000",
    "totalAtomic": "1008",
    "version": 1
  },
  "choices": [
    {
      "finish_reason": "stop",
      "index": 0,
      "message": {
        "content": "Around the Colosseum, try Caffè Propaganda on Via Claudia or Bar Martini for an espresso with a view.",
        "role": "assistant"
      }
    }
  ],
  "created": 1791932400,
  "id": "singit-ask-1791932400000",
  "model": "singit-ask",
  "object": "chat.completion",
  "usage": {
    "buyer_cost_micro": 6,
    "completion_tokens": 31,
    "prompt_tokens": 14,
    "total_tokens": 45
  }
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/57580.json for the price and payment options.
Pay. Call GET https://ask.singitai.app/v1/chat/completions. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Solana, Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.003 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Solana, Base
Demand: 2 calls · 1 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
upto	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC	$0.003	4an2sqamWWhny9mjLsMtGXCDXakeNtg6vSLq4QvhdmQu	300s
upto	Base eip155:8453	USDC	$0.003	0xC23d1Dc0f5fCe1abfFB051e06cB93f0329968B4e	120s

accepts[] (raw JSON)

[
  {
    "scheme": "upto",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "4an2sqamWWhny9mjLsMtGXCDXakeNtg6vSLq4QvhdmQu",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "3000",
    "amountUsd": 0.003,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "upto",
    "network": "eip155:8453",
    "payTo": "0xC23d1Dc0f5fCe1abfFB051e06cB93f0329968B4e",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "3000",
    "amountUsd": 0.003,
    "maxTimeoutSeconds": 120
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "properties": {
        "billing": {
          "description": "What was charged, in USDC micro-units",
          "properties": {
            "currency": {
              "const": "USDC",
              "type": "string"
            },
            "markupAtomic": {
              "type": "string"
            },
            "providerCostAtomic": {
              "type": "string"
            },
            "totalAtomic": {
              "description": "The amount settled",
              "type": "string"
            }
          },
          "type": "object"
        },
        "choices": {
          "items": {
            "properties": {
              "finish_reason": {
                "description": "stop, or length when max_tokens ended the answer",
                "type": "string"
              },
              "index": {
                "type": "integer"
              },
              "message": {
                "properties": {
                  "content": {
                    "type": "string"
                  },
                  "role": {
                    "type": "string"
                  }
                },
                "type": "object"
              }
            },
            "type": "object"
          },
          "type": "array"
        },
        "created": {
          "description": "Unix seconds",
          "type": "integer"
        },
        "id": {
          "type": "string"
        },
        "model": {
          "type": "string"
        },
        "object": {
          "const": "chat.completion",
          "type": "string"
        },
        "usage": {
          "description": "Token counts and the model's own cost in micro-USD (buyer_cost_micro)",
          "type": "object"
        }
      },
      "required": [
        "choices",
        "billing"
      ],
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {
    "billing": {
      "currency": "string",
      "markupAtomic": "string",
      "providerCostAtomic": "string",
      "totalAtomic": "string"
    },
    "choices": [
      {
        "finish_reason": "string",
        "index": 0,
        "message": {
          "content": "string",
          "role": "string"
        }
      }
    ],
    "created": 0,
    "id": "string",
    "model": "string",
    "object": "string",
    "usage": {}
  },
  "type": "string"
}

Examples

curl

curl "https://ask.singitai.app/v1/chat/completions"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://ask.singitai.app/v1/chat/completions");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://ask.singitai.app/v1/chat/completions")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: ask.singitai.app
Endpoint: https://ask.singitai.app/v1/chat/completions
Machine-readable: /resources/57580.json