# x402factory-ai Solana GPT (J38T6ZGANCNB8SLZJZ)

> x402factory-ai Solana GPT (J38T6ZGANCNB8SLZJZ) is a paid API for AI agents from x402factory.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Exposes a GPT LLM API endpoint on Solana, paid via x402 micropayments in USDC, supporting direct chat completions and custom agent creation/listing

## Facts

- Endpoint: POST https://x402factory.ai/solana/llm/gpt/J38T6ZGANCNB8SLZJZ
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402factory-ai-solanallmgptj38t6zgancnb8slzjz-0a38b21b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jttGoztWiyfqrAcZsB-ZW

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-solanallmgptj38t6zgancnb8slzjz-0a38b21b -d '<json body>'
```

Example prompt: Ask the x402factory Solana GPT endpoint to explain the benefits of proof-of-stake consensus using gpt-5-mini, with a max output of 500 tokens and a 1000-token input cap, and pay the USDC fee automatically via x402.

## When to prefer this

Use this endpoint when you need pay-per-use GPT completions billed in USDC over Solana via x402 micropayments, especially when you want dynamic token-based pricing, want to create or invoke persistent custom preprompted agents identified by a custom_id, or are building Solana-native AI pipelines that require on-chain payment settlement.

## Known failure modes

- Input tokens exceed optional max_input_tokens cap — server returns error instead of under-pricing
- Insufficient USDC balance for x402 payment — payment rejected
- Invalid or expired custom_id — agent not found
- Unsupported model name — OpenAI API error propagated
- Message too long for selected model context window
- x402 facilitator unavailable — payment cannot be processed

## 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=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 J38T6ZGANCNB8SLZJZ on Solana. Model gpt-5-mini, max_input_tokens=5000, max_output_tokens=5000. Preprompt preview (first 150 chars): "can yes extract the atrifact url from this output, only reply with the image url nothing else". Pricing mode: agent-per-token. Prepaid price (x402) for this request: 0.017013 USDC. Estimated input tokens for pricing: 5031.

## Output

Returns a GPT text completion for direct calls, or a custom_id and stored base_price_usdc for action=create, or a list of up to 100 recent custom agents for action=list. Pricing details and token counts may also be returned.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402factory-ai-solanallmgptj38t6zgancnb8slzjz-0a38b21b/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)