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Method Idempotency Classify
x402
Method Idempotency Classify is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Classifies an HTTP method (GET, POST, PUT, DELETE, etc.) as safe, idempotent, or non-idempotent and returns a deterministic pass/advisory verdict.
Price / call$0.001
Success—
StatusUnknown
How this service works
Method Idempotency Classify: Method Idempotency Classify classifies an HTTP method as safe, idempotent, or non-idempotent from bounded caller-supplied values without an external provider. Call Method Idempotency Classify before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for Method Idempotency Classify as versioned deterministic JSON. Price: $0.001 USDC via x402 on Bas…
Output
Returns versioned deterministic JSON containing: the normalized HTTP method input as web evidence, the computed idempotency/safety classification (safe, idempotent, or non-idempotent), and an explicit pass or advisory status verdict.
Example use cases
Retry safety check for agent workflow
“Before my agent retries this failed request, can you classify 'POST' as safe, idempotent, or non-idempotent so I know if it's safe to resend it?”
Caching policy validation for API gateway
“I'm building a caching layer and need to know if the 'GET' HTTP method is classified as safe and idempotent — can you run that classification and give me the verdict?”
Redirect handling in HTTP pipeline
“My pipeline is deciding whether to follow a redirect — can you classify the HTTP method 'PUT' as safe, idempotent, or non-idempotent so I can handle it correctly?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/method-idempotency-classifyWhen to prefer
Use this endpoint when an agent or API pipeline needs a deterministic, authoritative classification of an HTTP method's idempotency and safety properties before making decisions about caching, retrying, redirecting, or accepting caller-supplied responses. Prefer this over ad-hoc logic when you need a versioned, auditable JSON verdict rather than hardcoded conditionals.
Side effects
- Invalid or unrecognized HTTP method string returns advisory status
- Empty method field results in validation error
- Oversized input beyond 8192 characters rejected
- Payment failure via x402 prevents processing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| method | string | Method supplied to Method Idempotency Classify; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"safe": false,
"method": "PUT",
"idempotent": true
},
"schema": "delx/util-method-idempotency-classify/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "c8f1d9636636150613283c76e75ed08a7999d0390f4e3478ee82fa118fcaef20",
"external_calls": 0
},
"operation": "web_reliability:method_idempotency_classify"
}
}Tags
x402
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