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GPT55 Prepaid Balance Top-Up
x402
GPT55 Prepaid Balance Top-Up is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
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.
Price / call$0.005
Success—
StatusUnknown
How this service works
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.
Output
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.
Example use cases
Example prompt
“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.”
Technical details
Endpoint
POSThttps://gpt55.558686.xyz/v1/wallet/topupWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| topupUsd | number | |
| accountId | string | |
| requestId | string | |
| topup_usd | number | |
| account_id | string | |
| request_id | string |
Tags
x402
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