# x402factory.ai Solana GPT Wrapper (NLWHXE46L5JQRV8XNN)

> x402factory.ai Solana GPT Wrapper (NLWHXE46L5JQRV8XNN) is a paid API for AI agents from x402factory.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Calls OpenAI GPT models via a Solana x402 micropayment-gated API, with support for direct prompts, custom agent creation, and agent listing

## Facts

- Endpoint: POST https://x402factory.ai/solana/llm/gpt/NLWHXE46L5JQRV8XNN
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402factory-ai-solanallmgptnlwhxe46l5jqrv8xnn-c2b26b32
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ixcg5SM8EWdPu-PUiUaBw

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-solanallmgptnlwhxe46l5jqrv8xnn-c2b26b32 -d '<json body>'
```

Example prompt: Send this message to GPT using the x402 Solana payment gateway: 'Summarize the key differences between proof-of-work and proof-of-stake blockchains' — use gpt-4o-mini, allow up to 2000 output tokens, and cap input at 1000 tokens.

## When to prefer this

Use this endpoint when you need to call OpenAI GPT models and pay per use via Solana USDC micropayments through the x402 protocol, especially when building agents or workflows that require pay-as-you-go LLM access without a traditional API key subscription. Prefer this over competitors when your infrastructure is Solana-native or you need to create reusable custom agents with stored preprompts billed at a known base price.

## Known failure modes

- Input tokens exceed max_input_tokens cap — server returns an error instead of under-pricing
- Insufficient USDC balance in Solana wallet — x402 payment fails
- Invalid or unsupported model name — API returns error
- Malformed message or missing required fields — 400 bad request
- Payment channel not established — x402 handshake failure

## 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 NLWHXE46L5JQRV8XNN on Solana. Model gpt-5.1, max_input_tokens=27000, max_output_tokens=12000. Preprompt preview (first 150 chars): "You are an expert summarization agent.  Your task is to create a clear, accurate, and structured summary of a video transcription.  Instructions: - Ba". Pricing mode: agent-per-token. Prepaid price (x402) for this request: 0.234856 USDC. Estimated input tokens for pricing: 27428.

## Output

Returns the GPT model's text response for direct calls; for action=create returns a custom_id for the newly created agent; for action=list returns up to 100 recent custom agents associated with the paying Solana wallet, along with base pricing metadata.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402factory-ai-solanallmgptnlwhxe46l5jqrv8xnn-c2b26b32/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)