Produce a buyer-ready postpaid GPT-5.5 invoice using the read-only sub2api pricing formula: input, output, cache creation, cache read, image output, service tier, long-context pricing, and rate multiplier. Returns machine-readable invoice JSON for usage-metered x402 clients without modifying sub2...
AI agents use gpt55_sub2api_official_metered_invoice 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.
| Parameter | Type | Required | Description |
|---|---|---|---|
tier | string | — | |
model | string | — | |
modelId | string | — | |
model_id | string | — | |
requestId | string | — | |
request_id | string | — | |
serviceTier | string | — | |
input_tokens | integer | — | |
promptTokens | integer | — | |
service_tier | string | — | |
contextTokens | integer | — | |
output_tokens | integer | — |
Parameters from the server's own tool schema.
This tool triggers financial transactions — it commits payment obligations via x402 USDC on Base or Solana USDC, making it Financial in category. The blast radius is high because an AI agent could repeatedly invoke it, accumulating real monetary charges up to $0.066667 per call with no stated rate limit, though individual amounts are small.
From the tool's definition Produce a buyer-ready postpaid GPT-5.5 invoice... Pay up to $0.066667 per request with x402 USDC on Base or choose the fixed-price Solana USDC option... Exact fixed-price payment and Base upto token-metered payment are both accepted
Risk signalsHigh parameter count (25 properties)
Attacks that exploit this kind of access
Produce a buyer-ready postpaid GPT-5.5 invoice using the read-only sub2api pricing formula: input, output, cache creation, cache read, image output, service tier, long-context pricing, and rate multiplier. Returns machine-readable invoice JSON for usage-metered x402 clients without modifying sub2api. Pay up to $0.066667 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. It is categorised as a Financial tool in the GPT 5 5 x402 Low Cost Agent Tools MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
gpt55_sub2api_official_metered_invoice accepts 12 parameters: tier, model, modelId, model_id, requestId, request_id, serviceTier, input_tokens, promptTokens, service_tier, contextTokens, output_tokens. The full parameter table on this page comes from the server's own tool schema.
Register the GPT 5 5 x402 Low Cost Agent Tools MCP server in PolicyLayer and add a rule for gpt55_sub2api_official_metered_invoice: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches GPT 5 5 x402 Low Cost Agent Tools. Nothing to install.
gpt55_sub2api_official_metered_invoice is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the gpt55_sub2api_official_metered_invoice rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for gpt55_sub2api_official_metered_invoice. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
gpt55_sub2api_official_metered_invoice is provided by the GPT 5 5 x402 Low Cost Agent Tools MCP server (https://gpt55.558686.xyz/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
gpt55_sub2api_official_metered_invoice is one line of GPT 5 5 x402 Low Cost Agent Tools's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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