# Delx Commerce Transfer Encoding Check

> Delx Commerce Transfer Encoding Check is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).

Parses and validates HTTP Transfer-Encoding header values, returning the ordered list of codings and whether chunked is last.

## Facts

- Endpoint: POST https://commerce.delx.ai/api/v1/x402/transfer-encoding-check?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-commerce-transfer-encoding-check-09cc5898
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ID5aHBiHe7cdUuhgn38hP

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability delx-commerce-transfer-encoding-check-09cc5898 -d '<json body>'
```

Example prompt: Check whether this Transfer-Encoding header is valid and tell me if chunked is correctly last: 'gzip, chunked'.

## When to prefer this

Use this endpoint when you need a deterministic, auditable, stateless parse of an HTTP Transfer-Encoding header with cryptographic evidence of no data retention — ideal for automated web reliability checks, HTTP conformance testing pipelines, or agent workflows that need verifiable header validation without standing up custom parsing logic.

## Known failure modes

- Malformed or non-string header input may result in a parse error or unexpected coding list
- Header exceeding 8192 characters will be rejected
- Payment failure via x402 will prevent execution
- Empty input may return an empty codings array with chunked_last false

## How this service works

Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.

## Output

Returns a JSON object with a 'result' field containing the ordered list of codings and a boolean indicating whether chunked is last, a status of 'pass' or 'fail', an operation label, and an evidence block confirming no data retention, no external calls made, and the SHA-256 hash of the input header.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "header": {
   "type": "string",
   "maxLength": 8192,
   "description": "Header supplied to Transfer Encoding Check; used only for this bounded calculation and processed in memory without retention."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "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"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-commerce-transfer-encoding-check-09cc5898/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from commerce.delx.ai](https://www.zero.xyz/host/commerce.delx.ai/llms.txt)