# gpt55_sub2api_balance_ledger_simulator

Calculate the same GPT-5.5 official usage cost as sub2api, then apply it to a prepaid balance ledger. Returns debit, balance-after, low-balance policy, idempotency key, and exportable JSON for wallet or API-credit systems. Pay up to $0.10 per request with x402 USDC on Base or choose the fixed-price Solana USDC option when advertised. Exact fixed-price payment and Base upto token-metered payment are both accepted when clients support them; upto settlements use actual response usage, a 0.0001 minimum, and the selected tier price as the cap. Canonical live prices: https://gpt55.558686.xyz/x402/live-prices.json.

Agent View of the PolicyLayer registry record for `gpt55_sub2api_balance_ledger_simulator`. HTML page: https://policylayer.com/tools/xyz-558686-gpt55-token-gateway/gpt55-sub2api-balance-ledger-simulator

## Facts

- Tool: `gpt55_sub2api_balance_ledger_simulator`
- Server: GPT 5 5 x402 Low Cost Agent Tools (`https://gpt55.558686.xyz/mcp`) — https://policylayer.com/tools/xyz-558686-gpt55-token-gateway.md
- Homepage: https://github.com/go165/gpt55-x402-gateway
- Risk category: Financial (Critical risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server CORS policy: *
- Server rate-limited: yes
- Parameters: 12
- Recommended policy verdict: Approval-gated

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `tier` | string | no |  |
| `model` | string | no |  |
| `modelId` | string | no |  |
| `model_id` | string | no |  |
| `requestId` | string | no |  |
| `balanceUsd` | number | no |  |
| `request_id` | string | no |  |
| `balance_usd` | number | no |  |
| `serviceTier` | string | no |  |
| `input_tokens` | integer | no |  |
| `promptTokens` | integer | no |  |
| `service_tier` | string | no |  |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "gpt55_sub2api_balance_ledger_simulator",
    "arguments": {}
  }
}
```

## Why gpt55_sub2api_balance_ledger_simulator is rated Critical

This tool performs financial operations by debiting a prepaid balance ledger and processing USDC cryptocurrency payments. It moves real money (USDC on Base or Solana) and commits financial obligations per request, placing it firmly in the Financial category with high severity due to potential for repeated or erroneous charges to a wallet/credit system.

From the tool's own definition: "'apply it to a prepaid balance ledger', 'Returns debit, balance-after', 'Pay up to $0.10 per request with x402 USDC on Base', 'Exact fixed-price payment and Base upto token-metered payment are both accepted', 'wallet or API-credit systems'"

Risk signals: High parameter count (33 properties)

## Use case

AI agents use gpt55_sub2api_balance_ledger_simulator to commit financial operations through GPT 5 5 x402 Low Cost Agent Tools, usually the final step of a payment, billing, or trading workflow. A call moves real money.

## Recommended policy (PolicyLayer)

Verdict: **Approval-gated**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches GPT 5 5 x402 Low Cost Agent Tools:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "gpt55_sub2api_balance_ledger_simulator": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}
```

## Other tools on GPT 5 5 x402 Low Cost Agent Tools (217)

- `gpt55_html_strip` — Destructive — https://policylayer.com/tools/xyz-558686-gpt55-token-gateway/gpt55-html-strip.md
- `gpt55_x402_buyer_client_adapter_pack` — Destructive — https://policylayer.com/tools/xyz-558686-gpt55-token-gateway/gpt55-x402-buyer-client-adapter-pack.md
- `gpt55_regex_match` — Execute — https://policylayer.com/tools/xyz-558686-gpt55-token-gateway/gpt55-regex-match.md
- `gpt55_url_parse` — Execute — https://policylayer.com/tools/xyz-558686-gpt55-token-gateway/gpt55-url-parse.md
- `gpt55_url_parse_get` — Execute — https://policylayer.com/tools/xyz-558686-gpt55-token-gateway/gpt55-url-parse-get.md
- `gpt55_wallet_signing_safety_pack` — Execute — https://policylayer.com/tools/xyz-558686-gpt55-token-gateway/gpt55-wallet-signing-safety-pack.md
- `gpt55_answer_professional` — Financial — https://policylayer.com/tools/xyz-558686-gpt55-token-gateway/gpt55-answer-professional.md
- `gpt55_balance_topup` — Financial — https://policylayer.com/tools/xyz-558686-gpt55-token-gateway/gpt55-balance-topup.md
- `gpt55_gpt55_plus_half_price_subscription` — Financial — https://policylayer.com/tools/xyz-558686-gpt55-token-gateway/gpt55-gpt55-plus-half-price-subscription.md
- `gpt55_sub2api_official_metered_invoice` — Financial — https://policylayer.com/tools/xyz-558686-gpt55-token-gateway/gpt55-sub2api-official-metered-invoice.md
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- `gpt55_x402_agent_payment_due_diligence_pack_get` — Financial — https://policylayer.com/tools/xyz-558686-gpt55-token-gateway/gpt55-x402-agent-payment-due-diligence-pack-get.md
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- `gpt55_x402_agent_treasury_rebalancing_policy` — Financial — https://policylayer.com/tools/xyz-558686-gpt55-token-gateway/gpt55-x402-agent-treasury-rebalancing-policy.md
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- …and 187 more: https://policylayer.com/tools/xyz-558686-gpt55-token-gateway.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=xyz-558686-gpt55-token-gateway · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/xyz-558686-gpt55-token-gateway