Diagnose why an x402 payment did not convert from quote to settled response: missing X-PAYMENT header, payTo/network/amount mismatch, wallet spend-cap block, verify failure, settle failure, or post-payment response delivery issue. This deterministic endpoint can inspect a live quote without payin...
AI agents call gpt55_x402_payment_failure_doctor_get to retrieve information from GPT 5 5 x402 Low Cost Agent Tools without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
url | string | — | |
body | object | — | |
method | string | — | |
status | integer | — | |
endpoint | string | — | |
resource | string | — | |
timeout_ms | integer | — | |
errorMessage | string | — | |
settleStatus | integer | — | |
verifyStatus | integer | — | |
error_message | string | — | |
expectedPayTo | string | — |
Parameters from the server's own tool schema.
Despite the payment-related context and mentions of x402 USDC/Solana payments, this tool is fundamentally a diagnostic/inspection utility. It queries payment state information deterministically without side effects, without executing transactions, and without modifying data. The payment details mentioned describe the tool's own operational cost model rather than financial actions the tool performs.
From the tool's definition Tool description states it 'can inspect a live quote without paying the target endpoint and never sends a payment header to the target service.' The primary verb is 'Diagnose' and the function is to analyze and return diagnostic information about payment…
Risk signalsAccepts URL/endpoint input (url) · Accepts raw HTML/template content (body) · High parameter count (39 properties)
Attacks that exploit this kind of access
Diagnose why an x402 payment did not convert from quote to settled response: missing X-PAYMENT header, payTo/network/amount mismatch, wallet spend-cap block, verify failure, settle failure, or post-payment response delivery issue. This deterministic endpoint can inspect a live quote without paying the target endpoint and never sends a payment header to the target service. GET variant for agents that prefer query parameters. Pay up to $0.006 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 Read tool in the GPT 5 5 x402 Low Cost Agent Tools MCP Server, which means it retrieves data without modifying state.
gpt55_x402_payment_failure_doctor_get accepts 12 parameters: url, body, method, status, endpoint, resource, timeout_ms, errorMessage, settleStatus, verifyStatus, error_message, expectedPayTo. 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_x402_payment_failure_doctor_get: 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_x402_payment_failure_doctor_get is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the gpt55_x402_payment_failure_doctor_get 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_x402_payment_failure_doctor_get. 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_x402_payment_failure_doctor_get 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_x402_payment_failure_doctor_get 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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