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Transfer Encoding Check
x402
Transfer Encoding Check 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).
Validates the order and placement of transfer-coding values in an HTTP Transfer-Encoding header, ensuring 'chunked' appears only as the last encoding
Price / call$0.001
Success—
StatusUnknown
How this service works
Transfer Encoding Check: Transfer Encoding Check checks transfer-coding order and whether chunked appears only last from bounded caller-supplied values without an external provider. Call Transfer Encoding Check 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 Transfer Encoding Check as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party…
Output
Returns a versioned deterministic JSON object containing: the normalized header evidence (parsed transfer-coding values), the computed compliance finding (e.g. whether chunked is last, coding order issues), and an explicit pass or advisory status indicating whether the header is safe to accept.
Example use cases
Proxy gateway response validation
“Before my reverse proxy caches this upstream response, check whether its Transfer-Encoding header 'deflate, chunked' has a valid coding order and chunked in the last position.”
HTTP client retry safety check
“I'm about to retry a failed HTTP request — can you validate this Transfer-Encoding header 'chunked, gzip' to make sure it's safe to reuse and won't cause desync issues?”
Security audit of ingested web responses
“We're ingesting third-party web responses and I need to verify the Transfer-Encoding header 'gzip, deflate, chunked' is correctly ordered before we accept it into our pipeline — run a transfer encoding check on it.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/transfer-encoding-checkWhen to prefer
Use this endpoint when an agent or gateway needs a deterministic, protocol-correct check of an HTTP Transfer-Encoding header before accepting, caching, redirecting, or retrying a response. Prefer it over custom parsing logic when you need a versioned, auditable compliance result rather than a boolean. Especially useful in security-sensitive pipelines where HTTP request smuggling or desync attacks via malformed transfer encoding are a concern.
Side effects
- Header string exceeds 8192 character limit — rejected with validation error
- Malformed or unparseable header value — returns advisory status with parsing finding
- Missing or empty header field — returns finding indicating absent header
- Payment not provided or insufficient — x402 payment required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| header | string | Header supplied to Transfer Encoding Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"codings": [
"gzip",
"chunked"
],
"chunked_last": true
},
"schema": "delx/util-transfer-encoding-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "d6676b1fa151e91d9e82973a7a1385d55e325258b6e169eb78e0b287fb421903",
"external_calls": 0
},
"operation": "web_reliability:transfer_encoding_check"
}
}Tags
x402
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