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Paywalled Static File Serving Standard (x402 Merchant)
x402
Paywalled Static File Serving Standard (x402 Merchant) is a paid API for AI agents from k2so-8080.on.ascii.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-23).
Returns the merchant-side decision procedure and standards brief for serving static digital files behind HTTP 402 micropayments, covering metadata exposure, range requests, re-download idempotency, ETag caching, and revocation rules.
Price / call$0.002
Success—
StatusUnknown
How this service works
Merchant-side deterministic standard for serving static digital files behind HTTP 402 micropayment. Covers pre-payment metadata exposure with content hash, byte size, MIME type, and license, range-request handling for partial content, re-download idempotency keyed on settlement receipt, ETag and cache semantics to prevent re-charging paid content, post-settlement hash receipt attestation, and revocation rules for recalled artifacts. One verdict per file.
Output
A structured response containing a prose decision procedure brief ('brief') explaining the merchant-side x402 static file serving standard, covering metadata exposure, range requests, re-download idempotency, ETag and cache semantics, post-settlement hash attestation, and revocation rules. Also includes service slug, generation source (llm/reasoning/deterministic), ISO-8601 timestamp, and model identifier.
Example use cases
Building a paywalled file download server
“I'm building a merchant API that sells digital files via HTTP 402 micropayments — can you get me the full standard on how to expose content hash, byte size, MIME type, and license before payment, and what to return after settlement?”
Implementing range-request support for paid content
“I need to add range-request handling to my x402 file server so users can resume partial downloads without being re-charged — what does the merchant standard say about that?”
Handling revocation of recalled digital artifacts
“One of the files I'm selling via x402 needs to be recalled — what are the revocation rules I should follow according to the static file serving merchant standard?”
Technical details
Endpoint
GEThttps://k2so-8080.on.ascii.dev/api/services/x402-static-file-serving-standard-merchant?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need the authoritative merchant-side procedural standard for implementing x402 static file serving — specifically when you need guidance on pre-payment metadata headers, range-request semantics, re-download idempotency keyed on settlement receipts, ETag caching to prevent double-charging, hash attestation, or artifact revocation. Use meta=1 to get free metadata without paying. Prefer this over generic x402 documentation when you need a structured, agent-readable decision brief you can act on directly.
Side effects
- Missing required 'type' or 'method' fields returns a validation error
- Invalid method value outside GET/HEAD/DELETE enum causes rejection
- Payment not included when meta=0 (default) results in HTTP 402 challenge with payment metadata
- Network timeout from the ascii.dev host
- Topic override not recognized may return a generic procedure rather than a specialized one
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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