# GPT-5.3 Codex 100-Call Prepaid Pack (Quote-First GET)

> GPT-5.3 Codex 100-Call Prepaid Pack (Quote-First GET) is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.598/call, status unknown (last checked 2026-10-23).

Returns a quote and initiates purchase of a 100-call prepaid credit pack for GPT-5.3 Codex API access, priced at 80% of the base per-call rate.

## Facts

- Endpoint: GET https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.3-codex-100?utm_source=zero.xyz
- Price: $0.598/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gpt-5-3-codex-100-call-prepaid-pack-quote-first-get-7d294fac
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-QUQiS9Tr42HxXTuycbQD

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability gpt-5-3-codex-100-call-prepaid-pack-quote-first-get-7d294fac
```

Example prompt: Get me a price quote and purchase the 100-call prepaid pack for GPT-5.3 Codex — I make a lot of repeat calls and want the bulk discount instead of paying the setup fee every time.

## When to prefer this

Choose this endpoint when an agent or user plans to make many GPT-5.3 Codex API calls and wants to save money by prepaying for 100 calls at 80% of the standard rate, avoiding the per-request setup cost. Prefer over per-call routes when volume is predictable and the bulk discount justifies upfront payment.

## Known failure modes

- Insufficient USDC balance to cover $2.72 per-call pack price — payment rejected
- x402 payment flow not completed — credits not issued
- Pack already purchased and non-refundable — no duplicate guard indicated
- Network or gateway error on gpt55.558686.xyz — 5xx response
- Invalid or missing x402 payment headers — 402 Payment Required returned without completing flow

## How this service works

GPT-5.6 Luna API Base USDC and OpenAI-compatible x402 chat: one request for $0.00293, paid by browser wallet or a quote-first agent fallback.

## Output

The agent receives a quoted price and purchase confirmation for a 100-call prepaid credit pack granting access to GPT-5.3 Codex, at 80% of the standard per-call total ($2.72 USDC per effective call), eliminating per-request setup overhead for repeat usage.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "additionalProperties": true
    },
    "queryParams": {
     "type": "object",
     "properties": {},
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "additionalProperties": true
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "pack": {
   "id": "gpt-5.3-codex-100-call-pack",
   "model": "gpt-5.3-codex",
   "price": "$0.598",
   "title": "GPT-5.3 Codex 100 Prepaid Call Credits",
   "token": "pk_test_***",
   "discount": 0.8,
   "priceUsd": 0.59776,
   "callCount": 100,
   "remainingCalls": 100
  },
  "productId": "model-call-pack"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gpt-5-3-codex-100-call-prepaid-pack-quote-first-get-7d294fac/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gpt55.558686.xyz](https://www.zero.xyz/host/gpt55.558686.xyz/llms.txt)