{"uid":"cap_KkH-6C3E_YatSkzyMpjCQ","slug":"gpt55-prepaid-balance-top-up-e4d9e44a","name":"GPT55 Prepaid Balance Top-Up","description":"Prepaid GPT55 balance top-up for the balance-metered chat endpoint. Pay $0.005 with x402 exact USDC on Base, then use the returned balance account token at /v1/chat/completions/balance.","url":"https://gpt55.558686.xyz/v1/wallet/topup","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"topupUsd":{"type":"number","minimum":0},"accountId":{"type":"string","maxLength":120,"minLength":1},"requestId":{"type":"string","maxLength":160},"topup_usd":{"type":"number","minimum":0},"account_id":{"type":"string","maxLength":120,"minLength":1},"request_id":{"type":"string","maxLength":160}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_VTginKcIA7Oj6JMuLeYaH","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Tops up a prepaid USDC balance account for use with the balance-metered GPT-5.5 chat completions endpoint, accepting $0.005 via x402 USDC payment on Base.","exampleAgentPrompt":"Top up my GPT55 balance account (account ID 'acct_abc123') with $0.005 USDC so I can keep using the balance-metered chat completions endpoint.","exampleUseCases":null,"resultDescription":"Returns a balance account token that can be used as authentication for the /v1/chat/completions/balance endpoint, along with confirmation of the credited balance amount.","failureModes":["Payment not received or incorrect USDC amount sent — top-up not applied","Invalid or missing accountId — account not found or created","x402 payment protocol error — transaction rejected on Base network","Duplicate requestId — idempotency conflict or replay rejection","Insufficient USDC in sender wallet — payment fails before credit"],"whenToPreferThis":"Use this endpoint when you need to pre-fund a balance account before making repeated calls to the gpt55.558686.xyz balance-metered chat completions endpoint, and want to pay once via x402 USDC on Base rather than paying per individual chat request.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:57:37.510Z","isFirstParty":false}