gpt55-token-gateway

GPT55 Model Gateway API

OpenAI-compatible, x402-paid model gateway at https://gpt55.558686.xyz. The provider's own OpenAPI 3.1.0 document declares 37 operations on servers[] https://gpt55.558686.xyz, every one with a unique operationId and a summary: GET /v1/models (answers 200 anonymously with seven model ids and per-model pricing), POST /v1/chat/completions plus model-specific routes (/standard, /gpt-5.6-sol, /gpt-5.6-luna, /gpt-5.6-terra, /gpt-5.6, /gpt-5.5, /gpt-5.3-codex, /metered), GET quote routes for 100-call prepaid packs, POST text tools (translate in three tiers, summarize, rewrite, answer, code-review, extract-json), three Sub2API billing helpers, and retained deterministic tools (timestamp, query-parse, EVM wallet balance, x402 MCP integration kit, x402 Bazaar search, wallet signing safety pack). Every paid operation documents a 200 and a 402; an unpaid request returns the x402 v2 quote (PAYMENT-REQUIRED header + JSON accepts[]) and the same request is retried with X-PAYMENT. Prices are carried in x-x402-price / x-gpt55-product on each operation; the spec declares no securitySchemes and no components.schemas.

Documentation GitHub OpenAPI

Operations 37

GET /v1/models models #

POST /v1/chat/completions completions #

POST /v1/chat/completions/standard GPT-5.6 Luna Standard chat completion #

POST /v1/chat/completions/gpt-5.6-sol GPT-5.6 Soul chat completion #

POST /v1/chat/completions/gpt-5.6-luna GPT-5.6 Luna chat completion #

POST /v1/chat/completions/gpt-5.6-terra GPT-5.6 Terra chat completion #

POST /v1/chat/completions/gpt-5.6 GPT-5.6 Soul chat completion alias #

POST /v1/chat/completions/gpt-5.5 gpt-5.5 #

POST /v1/chat/completions/gpt-5.3-codex gpt-5.3-codex #

POST /v1/chat/completions/metered metered #

GET /v1/paid/call-packs/gpt-5.6-sol-100 gpt 5.6 sol 100 #

GET /v1/paid/call-packs/gpt-5.6-luna-100 gpt 5.6 luna 100 #

GET /v1/paid/call-packs/gpt-5.6-terra-100 gpt 5.6 terra 100 #

GET /v1/paid/call-packs/gpt-5.5-100 gpt 5.5 100 #

GET /v1/paid/call-packs/gpt-5.3-codex-100 gpt 5.3 codex 100 #

POST /v1/tools/translate translate #

POST /v1/tools/translate/standard standard #

POST /v1/tools/translate/plus plus #

POST /v1/tools/translate/professional professional #

POST /v1/tools/summarize summarize #

POST /v1/tools/rewrite rewrite #

POST /v1/tools/answer answer #

POST /v1/tools/code-review code review #

POST /v1/tools/extract-json extract json #

POST /v1/tools/sub2api-official-metered-invoice sub2api official metered invoice #

POST /v1/tools/sub2api-balance-ledger-simulator sub2api balance ledger simulator #

POST /v1/tools/gpt55-plus-half-price-subscription gpt55 plus half price subscription #

GET /v1/tools/timestamp timestamp #

GET /v1/tools/query-parse query parse #

GET /v1/tools/evm-wallet-balance EVM Wallet Balance Snapshot #

POST /v1/tools/evm-wallet-balance EVM Wallet Balance Snapshot #

HEAD /v1/tools/evm-wallet-balance EVM Wallet Balance Snapshot #

POST /v1/tools/x402-mcp-integration-kit x402 mcp integration kit #

POST /v1/tools/x402-bazaar-search x402 bazaar search #

GET /v1/paid/wallet-payment-activation-agent Wallet Payment Activation Agent #

GET /v1/paid/wallet-signing-safety-pack Quote or buy wallet signing safety pack via GET #

POST /v1/paid/wallet-signing-safety-pack Buy wallet signing safety pack via POST #

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OpenAPI Specification

{"openapi":"3.1.0","info":{"title":"GPT55 Model Gateway","version":"1.0.0","description":"Reduced GPT55 public surface after x402 project split, with GPT-5.6 Luna Standard as the default upstream gpt-5.6-luna model path, explicit Soul and Terra routes for higher-cost requests, the unified service hub, prepaid Luna call packs, and per-request x402 calls.","x-gpt55-relatedProjects":[{"id":"x402-utility-tools","title":"Utility tools","status":"retired_consolidated","historicalOrigin":"https://x402-utils.558686.xyz","canonicalOrigin":"https://gpt55.558686.xyz","paidRoutesAvailableOnHistoricalHost":false,"retirementNotice":"https://x402-utils.558686.xyz/.well-known/x402","canonicalServiceHub":"https://gpt55.558686.xyz/x402/service","paymentPolicy":"Do not pay a retired split-host URL. Follow the retirement notice to the canonical GPT55 service hub and fetch a fresh live quote there."},{"id":"x402-agent-wallet-tools","title":"Agent wallet tools","status":"retired_consolidated","historicalOrigin":"https://x402-wallet.558686.xyz","canonicalOrigin":"https://gpt55.558686.xyz","paidRoutesAvailableOnHistoricalHost":false,"retirementNotice":"https://x402-wallet.558686.xyz/.well-known/x402","canonicalServiceHub":"https://gpt55.558686.xyz/x402/service","paymentPolicy":"Do not pay a retired split-host URL. Follow the retirement notice to the canonical GPT55 service hub and fetch a fresh live quote there."},{"id":"x402-seller-growth-tools","title":"Seller growth tools","status":"retired_consolidated","historicalOrigin":"https://x402-seller.558686.xyz","canonicalOrigin":"https://gpt55.558686.xyz","paidRoutesAvailableOnHistoricalHost":false,"retirementNotice":"https://x402-seller.558686.xyz/.well-known/x402","canonicalServiceHub":"https://gpt55.558686.xyz/x402/service","paymentPolicy":"Do not pay a retired split-host URL. Follow the retirement notice to the canonical GPT55 service hub and fetch a fresh live quote there."},{"id":"x402-key-url-tools","title":"Key and URL tools","status":"retired_consolidated","historicalOrigin":"https://x402-key.558686.xyz","canonicalOrigin":"https://gpt55.558686.xyz","paidRoutesAvailableOnHistoricalHost":false,"retirementNotice":"https://x402-key.558686.xyz/.well-known/x402","canonicalServiceHub":"https://gpt55.558686.xyz/x402/service","paymentPolicy":"Do not pay a retired split-host URL. Follow the retirement notice to the canonical GPT55 service hub and fetch a fresh live quote there."}],"x-gpt55-payment":{"protocol":"x402","network":"eip155:8453","asset":"USDC","payTo":"0x1f0130669ca6fd02e025a984cc038f139df19a2f","facilitator":"provider-pool","facilitatorPool":[{"id":"dexter","url":"https://x402.dexter.cash","status":"frozen_settlement","active":false,"networks":["eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"],"observedAt":"2026-07-19T16:04:32.063Z"},{"id":"fluxa","url":"https://facilitator.fluxapay.xyz","status":"frozen_settlement","active":false,"networks":["eip155:8453"],"observedAt":"2026-07-19T16:04:32.063Z"},{"id":"mogami","url":"https://v2.facilitator.mogami.tech","status":"frozen_unreachable","active":false,"networks":["eip155:8453"],"observedAt":"2026-09-18T08:31:22.080Z"},{"id":"primer","url":"https://x402.primer.systems","status":"frozen_unreachable","active":false,"networks":["eip155:8453"],"observedAt":"2026-09-18T08:31:22.080Z"},{"id":"xpay","url":"https://facilitator.xpay.sh","status":"enabled","active":true,"networks":["eip155:8453"],"observedAt":"2026-09-18T08:36:32.152Z"},{"id":"payai","url":"https://facilitator.payai.network","status":"frozen_quota","active":false,"networks":["eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"],"observedAt":"2026-09-18T08:36:32.152Z"},{"id":"kobaru","url":"https://gateway.kobaru.io","status":"frozen_unreachable","active":false,"networks":["eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"],"observedAt":"2026-09-18T08:31:22.080Z"},{"id":"cdp","url":"https://api.cdp.coinbase.com/platform/v2/x402","status":"frozen_unreachable","active":false,"networks":["eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"],"observedAt":"2026-08-29T17:17:22.202Z"},{"id":"solvador","url":"https://api.solvador.com","status":"disabled","active":false,"networks":[]}],"fallbackFacilitators":["https://facilitator.xpay.sh"]},"primaryCommercialOffer":{"id":"standard-chat-demand-first","routeId":"standard-chat","title":"GPT-5.6 Luna Standard one-request result","buyerJob":"Get one immediate OpenAI-compatible answer before committing to a quota pack or a larger workflow.","method":"POST","paidUrl":"https://gpt55.558686.xyz/v1/chat/completions/standard","quoteOnlyUrl":"https://gpt55.558686.xyz/v1/chat/completions/standard","previewUrl":"https://gpt55.558686.xyz/x402/service?checkout=standard-chat","price":"$0.00293","priceUsd":0.00293,"amountAtomic":"2930","network":"eip155:8453","asset":"USDC","assetAddress":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","payTo":"0x1f0130669ca6fd02e025a984cc038f139df19a2f","input":{"contentType":"application/json","example":{"messages":[{"role":"user","content":"Answer one concrete question in one short paragraph."}],"max_tokens":128}},"resultFields":["id","model","choices","usage","x-x402-receipt-id","x-x402-receipt-url"],"browserCheckout":{"available":true,"provider":"EIP-1193 injected 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MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs","installCommand":"npm install @x402/fetch @x402/core @x402/evm viem","requiredRuntime":"optional-desktop-or-server-terminal-fallback","sameRequestRetry":true,"paymentHeaders":["PAYMENT-SIGNATURE","X-PAYMENT"],"privateKeySentToService":false},"model":"gpt-5.6-luna","nextPurchase":{"id":"gpt-5.6-luna-100-call-pack","routeId":"gpt-5.6-luna-100-call-pack","title":"GPT-5.6 Luna 100 Prepaid Call 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result","page":"https://gpt55.558686.xyz/x402/service?checkout=standard-chat","json":"https://gpt55.558686.xyz/x402/service.json","checkoutUrl":"https://gpt55.558686.xyz/x402/service?checkout=standard-chat","quoteUrl":"https://gpt55.558686.xyz/v1/chat/completions/standard","quoteEndpoint":"https://gpt55.558686.xyz/v1/chat/completions/standard","quoteEndpointMode":"live-402","firstPaymentClient":"https://gpt55.558686.xyz/x402/first-payment-client.mjs","paymentClientUrl":"https://gpt55.558686.xyz/x402/first-payment-client.mjs","paymentActivation":"https://gpt55.558686.xyz/x402/service?checkout=standard-chat","installCommand":"npm install @x402/fetch @x402/core @x402/evm viem","quoteOnlyDedicated":"ROUTE_ID=standard MAX_USDC=0.00293 node first-payment-client.mjs","realPaymentDedicated":"PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs","paymentHeaderOnlyDedicated":"X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs","installThenCreatePaymentHeaderDedicated":"npm install @x402/fetch @x402/core @x402/evm viem && X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs","downloadInstallThenCreatePaymentHeaderDedicated":"curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs","payCommand":"curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs","downloadInstallThenPayDedicated":"curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs","expectedResult":["id","model","choices","usage","x-x402-receipt-id","x-x402-receipt-url"]},"marketDemandOffer":{"id":"standard-chat-demand-first","routeId":"standard-chat","title":"GPT-5.6 Luna Standard one-request result","buyerJob":"Get one immediate OpenAI-compatible answer before committing to a quota pack or a larger workflow.","method":"POST","paidUrl":"https://gpt55.558686.xyz/v1/chat/completions/standard","quoteOnlyUrl":"https://gpt55.558686.xyz/v1/chat/completions/standard","previewUrl":"https://gpt55.558686.xyz/x402/service?checkout=standard-chat","price":"$0.00293","priceUsd":0.00293,"amountAtomic":"2930","network":"eip155:8453","asset":"USDC","assetAddress":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","payTo":"0x1f0130669ca6fd02e025a984cc038f139df19a2f","input":{"contentType":"application/json","example":{"messages":[{"role":"user","content":"Answer one concrete question in one short paragraph."}],"max_tokens":128}},"resultFields":["id","model","choices","usage","x-x402-receipt-id","x-x402-receipt-url"],"browserCheckout":{"available":true,"provider":"EIP-1193 injected wallet","type":"eip3009-transfer-with-authorization","url":"https://gpt55.558686.xyz/x402/service?checkout=standard-chat","paidUrl":"https://gpt55.558686.xyz/v1/chat/completions/standard","quoteOnlyUrl":"https://gpt55.558686.xyz/v1/chat/completions/standard","bundleUrl":"https://gpt55.558686.xyz/x402/browser-wallet-payment.js","method":"POST","network":"eip155:8453","asset":"USDC","assetAddress":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","payTo":"0x1f0130669ca6fd02e025a984cc038f139df19a2f","amountAtomic":"2930","paymentHeader":"PAYMENT-SIGNATURE","responseHeaders":["PAYMENT-RESPONSE","X-PAYMENT-RESPONSE","x-x402-receipt-id","x-x402-receipt-url"],"privateKeySentToService":false,"buttonLabel":"Pay with browser wallet"},"agentFallback":{"routeId":"standard","firstPaymentClient":"https://gpt55.558686.xyz/x402/first-payment-client.mjs","quoteOnlyCommand":"ROUTE_ID=standard MAX_USDC=0.00293 node first-payment-client.mjs","realPaymentCommand":"PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs","installCommand":"npm install @x402/fetch @x402/core @x402/evm viem","requiredRuntime":"optional-desktop-or-server-terminal-fallback","sameRequestRetry":true,"paymentHeaders":["PAYMENT-SIGNATURE","X-PAYMENT"],"privateKeySentToService":false},"model":"gpt-5.6-luna","nextPurchase":{"id":"gpt-5.6-luna-100-call-pack","routeId":"gpt-5.6-luna-100-call-pack","title":"GPT-5.6 Luna 100 Prepaid Call 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result","page":"https://gpt55.558686.xyz/x402/service?checkout=standard-chat","json":"https://gpt55.558686.xyz/x402/service.json","checkoutUrl":"https://gpt55.558686.xyz/x402/service?checkout=standard-chat","quoteUrl":"https://gpt55.558686.xyz/v1/chat/completions/standard","quoteEndpoint":"https://gpt55.558686.xyz/v1/chat/completions/standard","quoteEndpointMode":"live-402","firstPaymentClient":"https://gpt55.558686.xyz/x402/first-payment-client.mjs","paymentClientUrl":"https://gpt55.558686.xyz/x402/first-payment-client.mjs","paymentActivation":"https://gpt55.558686.xyz/x402/service?checkout=standard-chat","installCommand":"npm install @x402/fetch @x402/core @x402/evm viem","quoteOnlyDedicated":"ROUTE_ID=standard MAX_USDC=0.00293 node first-payment-client.mjs","realPaymentDedicated":"PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs","paymentHeaderOnlyDedicated":"X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs","installThenCreatePaymentHeaderDedicated":"npm install @x402/fetch @x402/core @x402/evm viem && X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs","downloadInstallThenCreatePaymentHeaderDedicated":"curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs","payCommand":"curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs","downloadInstallThenPayDedicated":"curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs","expectedResult":["id","model","choices","usage","x-x402-receipt-id","x-x402-receipt-url"]},"recommendedFirstPurchase":{"id":"standard-chat-demand-first","routeId":"standard-chat","title":"GPT-5.6 Luna Standard one-request result","buyerJob":"Get one immediate OpenAI-compatible answer before committing to a quota pack or a larger workflow.","method":"POST","paidUrl":"https://gpt55.558686.xyz/v1/chat/completions/standard","quoteOnlyUrl":"https://gpt55.558686.xyz/v1/chat/completions/standard","previewUrl":"https://gpt55.558686.xyz/x402/service?checkout=standard-chat","price":"$0.00293","priceUsd":0.00293,"amountAtomic":"2930","network":"eip155:8453","asset":"USDC","assetAddress":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","payTo":"0x1f0130669ca6fd02e025a984cc038f139df19a2f","input":{"contentType":"application/json","example":{"messages":[{"role":"user","content":"Answer one concrete question in one short paragraph."}],"max_tokens":128}},"resultFields":["id","model","choices","usage","x-x402-receipt-id","x-x402-receipt-url"],"browserCheckout":{"available":true,"provider":"EIP-1193 injected 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# Full source: https://raw.githubusercontent.com/api-evangelist/558686-xyz/refs/heads/main/openapi/558686-xyz-gpt55-model-gateway-openapi.json