GPT-5.3 Codex chat for coding-oriented agent work, patch planning, and structured development output. Pay up to $0.034 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 w...
AI agents use chat_gpt_5_3_codex 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 |
|---|---|---|---|
model | string | — | |
stream | boolean | — | |
messages | array | Yes | |
max_tokens | integer | — |
Parameters from the server's own tool schema.
This tool commits financial obligations per invocation by triggering USDC cryptocurrency payments (on Base or Solana) for each request. Misuse by an AI agent could result in repeated financial charges, making this a Financial category tool with high severity due to the potential for accumulated cryptocurrency spend.
From the tool's definition Pay up to $0.034 per request with x402 USDC on Base or choose the fixed-price Solana USDC option
Risk signalsAccepts raw HTML/template content (messages[].content)
Attacks that exploit this kind of access
GPT-5.3 Codex chat for coding-oriented agent work, patch planning, and structured development output. Pay up to $0.034 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.
chat_gpt_5_3_codex accepts 4 parameters: model, stream, messages, max_tokens. Required: messages. 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 chat_gpt_5_3_codex: 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.
chat_gpt_5_3_codex 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 chat_gpt_5_3_codex 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 chat_gpt_5_3_codex. 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.
chat_gpt_5_3_codex 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.
chat_gpt_5_3_codex 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.
Teams ship this data inside their own products. See what a licence covers →