# x402factory-ai Solana GPT-4 LLM Wrapper (4TC64D7MFFRX5DNRZ9)

> x402factory-ai Solana GPT-4 LLM Wrapper (4TC64D7MFFRX5DNRZ9) 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).

Pay-per-call GPT wrapper on Solana via x402 micropayments, supporting direct chat completions and custom agent creation with configurable models, token limits, and USDC pricing.

## Facts

- Endpoint: POST https://x402factory.ai/solana/llm/gpt/4TC64D7MFFRX5DNRZ9
- 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-solanallmgpt4tc64d7mffrx5dnrz9-d6c8a9d6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2veLn4HDVlHQ0X4_sIIA5

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-solanallmgpt4tc64d7mffrx5dnrz9-d6c8a9d6 -d '<json body>'
```

Example prompt: Use the x402factory Solana GPT endpoint to answer this question using gpt-4o with max 1500 output tokens: 'What are the main differences between proof-of-work and proof-of-stake blockchains?' and pay with my Solana USDC wallet.

## When to prefer this

Choose this endpoint when you need GPT-based text generation paid transparently via Solana USDC micropayments using the x402 protocol, especially when building agents that need per-call billing on Solana, creating custom preprompted agents, or listing previously created agents tied to a specific wallet.

## Known failure modes

- Input tokens exceed max_input_tokens cap — server returns error instead of under-pricing
- Insufficient USDC balance in wallet — x402 payment fails
- Invalid model name provided — OpenAI API error returned
- custom_id not found — error when calling a non-existent custom agent
- Message too long for selected model context window — OpenAI error propagated
- x402 payment header missing or malformed — 402 Payment Required response

## 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 4TC64D7MFFRX5DNRZ9 on Solana. Model gpt-5-mini, max_input_tokens=5000, max_output_tokens=5000. Preprompt preview (first 150 chars): "Give me the 5 raw output from the most important new topics in this output also add the image link to every post :". Pricing mode: agent-per-token. Prepaid price (x402) for this request: 0.017016 USDC. Estimated input tokens for pricing: 5038.

## Output

Returns an LLM-generated text completion for the given message, or a custom_id when creating a new custom agent, or a list of up to 100 recent custom agents associated with the paying wallet. Includes token usage and computed USDC price charged.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402factory-ai-solanallmgpt4tc64d7mffrx5dnrz9-d6c8a9d6/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)