SingIt Ask – OpenAI Responses API

x402

SingIt Ask – OpenAI Responses API is a paid API for AI agents from ask.singitai.app, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-28).

Calls OpenAI's Responses API format (supporting GPT, Claude, Gemini, DeepSeek and more) with per-answer metered payment via x402, no API key required

Price / call$0.003

Seller volume →—

Success—

StatusUnknown

How this service works

SingIt Ask: OpenAI's Responses API, any model listed at GET /v1/models (GPT, Claude, Gemini, DeepSeek and more). Call it when an agent needs an answer in OpenAI's Responses format with no API key or account.

Output

Returns the model's completion in OpenAI Responses API format, including the generated text content and token usage metadata. Charges are applied only when a valid answer is returned: actual token cost plus 30% markup plus a settlement fee (0.001 USDC on Base, 0.002 on Solana), up to a model/size-specific ceiling.

Example use cases

No-account LLM prompt for automation

“Send this system prompt and user message to Claude 3.5 Sonnet using the OpenAI Responses format on SingIt — I don't want to manage API keys, just charge my USDC balance per answer: system='You are a concise JSON extractor', user='Extract name, date, and amount from: Invoice #1042 for Alice, 2024-06-01, $320.00'”

Multi-model comparison without subscriptions

“Query both gpt-4o-mini and gemini-1.5-flash with the same prompt through SingIt's Responses API — 'What are three creative names for a plant-based burger brand?' — and show me both answers, paying only when each responds.”

AI coding assistant call from a script

“Through SingIt's OpenAI Responses API, ask DeepSeek-Coder: 'Write a Python function that validates an email address using a regex and returns True or False' — bill it as a micropayment so my script doesn't need a stored API key.”

Technical details

Endpoint

POSThttps://ask.singitai.app/v1/responses?utm_source=zero.xyz

When to prefer

Prefer this endpoint when you need to call LLMs via the OpenAI Responses API format without managing API keys or subscriptions, especially in agent pipelines that want pay-per-successful-answer semantics with USDC micropayments. It is ideal when you want to access GPT, Claude, Gemini, or DeepSeek through a single unified interface with crypto-native billing. Choose it over direct provider APIs when you want no upfront account setup, only-on-success charging, and support for multiple model families from one endpoint.

Side effects

Insufficient USDC balance — payment rejected before inference runs
Invalid or unsupported model name — model not found in /v1/models list
Malformed request body — missing required 'input' field or wrong bodyType enum
Model provider outage — upstream LLM unavailable, no charge applied
Request too large — exceeds ceiling for the selected model
Network timeout — inference takes too long, no answer returned so no charge

Input

Schema · Request body

Field	Type	Description
input	—	The question: text, or a non-empty list of input items (OpenAI Responses format).
model	string	Any model id from GET /v1/models; Anthropic's dashed names (claude-sonnet-5-5) work too.
tools	array	Optional tool definitions.
stream	boolean	Streaming is not offered: an answer is paid for whole.
instructions	string	Optional system instructions.
max_output_tokens	integer	The longest answer, in tokens. The payment ceiling grows with it; the charge follows what was used.

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