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Delx Commerce — Content-Type Match Validator
x402
Delx Commerce — Content-Type Match Validator 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).
Checks whether an actual HTTP Content-Type value matches an expected media type pattern or range, returning a pass/fail result with verifiable evidence.
Price / call$0.001
Success—
StatusUnknown
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 indicating whether the actual media type matched the expected pattern (matched: true/false), the normalized expected range, the parsed actual media type, an overall pass/fail status, and an evidence block containing a SHA-256 hash of the input and confirmation that no data was retained or sent to external services.
Example use cases
API response content-type guard
“My API call returned 'text/html' but I expected 'application/json' — can you check if those content types match and tell me if the response is safe to parse as JSON?”
Webhook payload type verification
“Before I process this incoming webhook, check whether the actual content type 'application/vnd.api+json' satisfies the expected range 'application/*+json'.”
HTTP client integration test
“I'm writing a test for my HTTP client — verify that the content type 'application/problem+json' correctly matches the pattern 'application/*+json' so I know my matching logic is right.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/content-type-match?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs to programmatically verify HTTP content-type compatibility — for example, before parsing a response body, validating webhook payloads, or asserting correct MIME types in integration tests. It is ideal when you want a pay-per-call, no-signup, verifiable validation with a cryptographic evidence trail (SHA-256 of inputs) and no data retention.
Side effects
- Malformed or unparseable content-type strings may return a failed match or validation error
- Input strings exceeding 8192 characters will be rejected
- Missing 'actual' or 'expected' fields result in a bad request error
- Ambiguous wildcard patterns may produce unexpected match semantics
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| actual | string | Actual supplied to Content Type Match; used only for this bounded calculation and processed in memory without retention. |
| expected | string | Expected supplied to Content Type Match; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"matched": true,
"expected_range": "application/*+json",
"actual_media_type": "application/problem+json"
},
"schema": "delx/util-content-type-match/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "b7c613a2c98fff13f2ac6da517851a23617d85340d45c743194249ef9f57070f",
"external_calls": 0
},
"operation": "web_reliability:content_type_match"
}
}Tags
x402
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