# x402factory GPT Wrapper (Solana, KCBWQQHUC8D4GQB5DT)

> x402factory GPT Wrapper (Solana, KCBWQQHUC8D4GQB5DT) is a paid API for AI agents from x402factory.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Exposes OpenAI GPT models via a pay-per-use Solana x402 micropayment API, supporting direct chat completions, custom agent creation, and agent listing

## Facts

- Endpoint: POST https://x402factory.ai/solana/llm/gpt/KCBWQQHUC8D4GQB5DT
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402factory-ai-x402factory-3-d6f9412f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_srpcpMM5_JUmumLlGX_-m

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 x402factory-ai-x402factory-3-d6f9412f -d '<json body>'
```

Example prompt: Ask GPT-5-mini to summarize the following article in 3 bullet points and pay for it with my Solana wallet via x402: 'AI regulation in the EU is accelerating, with new rules targeting foundation model developers...' — cap the output at 500 tokens.

## When to prefer this

Choose this endpoint when you need GPT inference paid via Solana USDC micropayments using the x402 protocol, especially when building autonomous agents that pay per call without a traditional API key subscription. Ideal for Solana-native applications, agentic workflows with per-query billing, or creating reusable preprompt-based agents stored on x402factory.

## Known failure modes

- Input exceeds max_input_tokens cap — server returns error instead of under-pricing
- Insufficient USDC balance in Solana wallet — x402 payment fails
- Invalid or unknown model name — request rejected
- custom_id not found when trying to use a stored agent — 404 or error response
- Malformed message payload — 400 bad request

## How this service works

Solana GPT wrapper API using x402 payments. Default direct call: model gpt-5-mini, max_output_tokens=2000, fixed price 0.01 USDC for up to 1000 input tokens. For all other settings the price is computed per model as (input_tokens * input_price_per_million + max_output_tokens * output_price_per_million) / 1,000,000, with a minimum of 0.001 USDC and always rounded up to 6 decimals. Optional max_input_tokens lets you cap the input tokens used for pricing; if the message is longer than this cap the server returns an error instead of under-pricing. Optional action=message (or omitting action) performs a direct GPT call with the given message. Optional action=create creates a custom agent with the given message as preprompt for 0.001 USDC (no OpenAI call), stores a base_price_usdc using (max_input_tokens_for_agent or 1000) + preprompt + max_output_tokens, and returns a custom_id. Optional action=list lists up to 100 recent custom agents for the paying wallet for 0.001 USDC without calling OpenAI. Custom agents can be called via POST /solana/llm/gpt with custom_id, or POST /solana/llm/gpt/{custom_id}. Each custom agent has a fixed price per call based on its stored preprompt, model, max_output_tokens and max_input_tokens; if the runtime message is longer than max_input_tokens the server returns an error. Custom LLM agent KCBWQQHUC8D4GQB5DT on Solana. Model gpt-5-mini, max_input_tokens=5000, max_output_tokens=5000. Preprompt preview (first 150 chars): "Read the response carefully.  If the response already contains a prompt intended for an image generator, reply with ONLY that prompt verbatim.  If no ". Pricing mode: agent-per-token. Prepaid price (x402) for this request: 0.017083 USDC. Estimated input tokens for pricing: 5207.

## Output

Returns the GPT model's text completion for direct calls; for agent creation returns a custom_id and stored base_price_usdc; for listing returns up to 100 recent custom agents associated with the paying wallet.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402factory-ai-x402factory-3-d6f9412f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402factory.ai](https://www.zero.xyz/host/x402factory.ai/llms.txt)