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Delx Commerce — Range Header Parse
x402
Delx Commerce — Range Header Parse 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 an HTTP Range header string and resolves the concrete byte range (start, end, length, satisfiable) given a resource size
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 with the resolved byte range: start offset, end offset, byte length, and a satisfiable boolean indicating whether the range can be fulfilled. Also includes schema identifier, status, and evidence metadata (input hash, no data retention, zero external calls).
Example use cases
Partial file download validation
“I have a Range header of 'bytes=1000-1999' and a file that's 1500 bytes — can you parse that and tell me if the range is satisfiable and what the actual byte offsets would be?”
Streaming media byte-range resolution
“My video server received a Range request with header 'bytes=-500' for a 10485760-byte file. Parse that header and give me the exact start, end, and length I need to serve.”
HTTP 206 handler range computation
“Before I respond with a 206 Partial Content, I need to resolve the Range header 'bytes=2048-4095' against a 8192-byte resource — what are the concrete offsets and is it satisfiable?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/range-header-parse?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, pay-per-call, no-signup computation to parse and validate HTTP Range headers into concrete byte offsets — particularly in agent workflows that handle partial content delivery, streaming, or resumable downloads. Prefer this over rolling your own parser when you need verifiable, in-memory-only processing with cryptographic evidence of input and no data retention.
Side effects
- Malformed Range header string returns an unsatisfiable or error result
- Resource size of 0 may yield unsatisfiable ranges for most headers
- Range header exceeding 8192 characters is rejected at input validation
- Suffix ranges (bytes=-N) require correct resource_size to resolve properly
- Missing resource_size may cause incorrect or incomplete range resolution
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| header | string | Header supplied to Range Header Parse; used only for this bounded calculation and processed in memory without retention. |
| resource_size | integer | Resource Size supplied to Range Header Parse; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"end": 499,
"start": 0,
"length": 500,
"satisfiable": true
},
"schema": "delx/util-range-header-parse/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "b8cf82c3de152f6483e2bcdb69d68b8857f068e1b199d6c5fe801bbb24ff9086",
"external_calls": 0
},
"operation": "web_reliability:range_header_parse"
}
}Tags
x402
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