# SingIt Ask: GPT-5.6 Sol (OpenAI)

> SingIt Ask: GPT-5.6 Sol (OpenAI) is a paid API for AI agents from ask.singitai.app, paid per call via x402, $0.014546/call, status unknown (last checked 2026-10-30).

Provides OpenAI GPT-5.6 Sol chat completions via an OpenAI-compatible API with no API key or account required, paid per-call via x402.

## Facts

- Endpoint: POST https://ask.singitai.app/v1/chat/gpt-5.6-sol?utm_source=zero.xyz
- Price: $0.014546/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/singit-ask-gpt-5-6-sol-openai-3a98fe96
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_q-p8w2eH4MInArIhFoIGL

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability singit-ask-gpt-5-6-sol-openai-3a98fe96 -d '<json body>'
```

Example prompt: Using GPT-5.6 Sol, write me a Python function that parses a JSON file and extracts all keys with null values — keep the answer under 800 tokens.

## When to prefer this

Choose this endpoint when an agent specifically needs the GPT-5.6 Sol variant of OpenAI's GPT-5.6 family and does not have an OpenAI API key or wants pay-per-call billing via x402 USDC micropayments. Prefer over sibling endpoints (GPT-5.6 Terra, Claude, Gemini, etc.) when the task requires GPT-5.6 Sol's specific capabilities for general-purpose chat, coding, or reasoning.

## Known failure modes

- Payment not provided or insufficient USDC — x402 payment required error
- Message content exceeds 24000 character limit across all messages — validation error
- max_tokens exceeds 1200 — schema validation error
- More than 40 messages provided — minItems/maxItems violation
- Upstream OpenAI model unavailable — 5xx error propagated

## How this service works

SingIt Ask: GPT-5.6 Sol (OpenAI) chat completions with no API key or account, OpenAI-compatible. One of OpenAI's GPT-5.6 model variants: general-purpose chat, coding and reasoning. Call it when an agent needs GPT-5.6 Sol specifically.

## Output

Returns an OpenAI-compatible chat completion response containing the assistant's generated message, token usage counts, and finish reason. The response is non-streaming and capped at 1200 tokens maximum.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "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."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/singit-ask-gpt-5-6-sol-openai-3a98fe96/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ask.singitai.app](https://www.zero.xyz/host/ask.singitai.app/llms.txt)