GPT55 x402 MCP Gateway vs MCP Server

chat_standard

GPT-5.6 Luna chat for mainstream short answers, routing decisions, extraction helpers, and buyer trials. The legacy mini path remains available as a compatibility alias. Pay up to $0.00293 per request with x402 USDC on Base or choose the fixed-price Solana USDC option when advertised. Exact fixed-price payment and Base upto token-metered payment are both accepted when clients support them; upto settlements use actual response usage, a 0.0001 minimum, and the selected tier price as the cap. Canonical live prices: https://gpt55.558686.xyz/x402/live-prices.json.

chat_gpt_5_6_soul

GPT-5.6 Soul flagship chat for advanced reasoning, production work, code, and structured responses at GPT-5.5-matched pricing. Pay up to $0.099995 per request with x402 USDC on Base or choose the fixed-price Solana USDC option when advertised. Exact fixed-price payment and Base upto token-metered payment are both accepted when clients support them; upto settlements use actual response usage, a 0.0001 minimum, and the selected tier price as the cap. Canonical live prices: https://gpt55.558686.xyz/x402/live-prices.json.

chat_gpt_5_6_luna

GPT-5.6 Luna chat on the independently verified upstream gpt-5.6-luna model. Pay up to $0.019999 per request with x402 USDC on Base or choose the fixed-price Solana USDC option when advertised. Exact fixed-price payment and Base upto token-metered payment are both accepted when clients support them; upto settlements use actual response usage, a 0.0001 minimum, and the selected tier price as the cap. Canonical live prices: https://gpt55.558686.xyz/x402/live-prices.json.

chat_gpt_5_6_terra

GPT-5.6 Terra chat on the independently verified upstream gpt-5.6-terra model. Pay up to $0.049998 per request with x402 USDC on Base or choose the fixed-price Solana USDC option when advertised. Exact fixed-price payment and Base upto token-metered payment are both accepted when clients support them; upto settlements use actual response usage, a 0.0001 minimum, and the selected tier price as the cap. Canonical live prices: https://gpt55.558686.xyz/x402/live-prices.json.

chat_gpt_5_5

GPT-5.5 chat for stronger reasoning, production work, code, and structured responses. Pay up to $0.019999 per request with x402 USDC on Base or choose the fixed-price Solana USDC option when advertised. Exact fixed-price payment and Base upto token-metered payment are both accepted when clients support them; upto settlements use actual response usage, a 0.0001 minimum, and the selected tier price as the cap. Canonical live prices: https://gpt55.558686.xyz/x402/live-prices.json.

chat_gpt_5_3_codex

GPT-5.3 Codex chat for coding-oriented agent work, patch planning, and structured development output. Pay up to $0.007472 per request with x402 USDC on Base or choose the fixed-price Solana USDC option when advertised. Exact fixed-price payment and Base upto token-metered payment are both accepted when clients support them; upto settlements use actual response usage, a 0.0001 minimum, and the selected tier price as the cap. Canonical live prices: https://gpt55.558686.xyz/x402/live-prices.json.

chat_gpt_5_4

GPT-5.4 chat for high-quality general reasoning, coding, and structured responses. Pay up to $0.010109 per request with x402 USDC on Base or choose the fixed-price Solana USDC option when advertised. Exact fixed-price payment and Base upto token-metered payment are both accepted when clients support them; upto settlements use actual response usage, a 0.0001 minimum, and the selected tier price as the cap. Canonical live prices: https://gpt55.558686.xyz/x402/live-prices.json.

gpt55_x402_buyer_payment_execution_runbook

Premium GPT-5.5 x402 buyer execution agent that turns a paid route, budget cap, runtime, payTo/network expectation, and receipt policy into runnable Node, Python, Bash, MCP, and Flowise payment execution assets. The service never asks for private keys and never pays the target endpoint. Pay up to $4.90 per request with x402 USDC on Base or choose the fixed-price Solana USDC option when advertised. Exact fixed-price payment and Base upto token-metered payment are both accepted when clients support them; upto settlements use actual response usage, a 0.0001 minimum, and the selected tier price as the cap. Canonical live prices: https://gpt55.558686.xyz/x402/live-prices.json.

gpt55_x402_wallet_payment_activation_agent

Premium wallet payment activation agent for quote-only x402 buyers. It turns a target paid route, wallet runtime, route id, payTo/network expectations, receipt-gate requirement, and live quote intent signals into a buyer-owned activation plan, Node activation client, MCP payment activation config, Flowise payment activation node, and receipt gate policy without taking custody of private keys. Pay up to $2.90 per request with x402 USDC on Base or choose the fixed-price Solana USDC option when advertised. Exact fixed-price payment and Base upto token-metered payment are both accepted when clients support them; upto settlements use actual response usage, a 0.0001 minimum, and the selected tier price as the cap. Canonical live prices: https://gpt55.558686.xyz/x402/live-prices.json.