Looking for an alternative to GPT55 x402 MCP Gateway? Whether you need a different runtime environment, custom authentication support, or alternative API integrations in the Developer Tools ecosystem, we have cataloged and compared the top alternative MCP servers below.
GPT-5.6 Luna Standard paid API via x402: $0.00293 per request (2930 atomic) on Base USDC (eip155:8453), with browser-wallet checkout and an agent fallback client. Start at https://gpt55.558686.xyz/x402/service; POST https://gpt55.558686.xyz/v1/chat/completions/standard.
Direct comparison of key metrics, runtimes, authentication methods, and community popularity.
| Server Name | Runtime | Auth | Pricing | GitHub Stars | Downloads | Action |
|---|---|---|---|---|---|---|
G GPT55 x402 MCP Gateway (Target) | Remote (SSE) | Other | Paid | — | — | Current |
| Remote (SSE) | Free/None | Free | 88,618 | — | Compare → | |
| npx | API key | Bring your own API key (usage-based cost) | 173 | — | Compare → | |
| npx | API key | Free | 2,927 | — | Compare → | |
M MCP Server | Remote (SSE) | Free/None | Free | 43,051 | — | Compare → |
| npx | Other | Free | 62 | — | Compare → | |
| npx | No auth required | Free | 86 | — | Compare → | |
| npx | No auth required | Free | 46 | — | Compare → | |
C Codealive MCP | npx | Free/None | Free | 87 | — | Compare → |
C Coach Watts | npx | Free/None | Free | 79 | — | Compare → |
| npx | No auth required | Free | 28 | — | Compare → | |
| npx | Free/None | Free | 61 | — | Compare → | |
| npx | No auth required | Free | 176 | — | Compare → |