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JSON JCS (JSON Canonicalization Scheme) Transform
x402
JSON JCS (JSON Canonicalization Scheme) Transform is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-29).
Rewrites a JSON string using the JCS (RFC 8785) canonicalization transform, producing a deterministically ordered, whitespace-normalized JSON output.
Price / call$0.004
Success—
StatusUnknown
How this service works
Call when an agent needs JSON rewritten with the jcs transform. No network. Exact $0.004 USDC. Prefer unpaid POST /v1/sandbox/json-jcs first.
Output
Returns the input JSON string rewritten according to RFC 8785 JCS: keys sorted lexicographically at every level, no unnecessary whitespace, and Unicode characters in a canonical encoding. The output is a deterministic, reproducible JSON string suitable for hashing or digital signing.
Example use cases
Prepare JSON payload for digital signing
“I need to canonicalize this JSON payload using JCS before I sign it — can you rewrite it so the keys are sorted and it's in RFC 8785 canonical form? Here's the JSON: {"timestamp":"2024-01-15","amount":100,"currency":"USD","recipient":"alice"}”
Stable JSON for hash comparison
“I want to compare two JSON objects by hash, but they might have different key orderings. Can you apply the JCS canonicalization transform to this JSON so I get a deterministic, stable string I can hash? The JSON is: {"z":true,"a":"hello","m":[3,1,2]}”
Normalize JSON before storing in audit log
“Before writing this JSON record to our audit log, I need it in canonical JCS form so all entries look the same regardless of how they were constructed. Please canonicalize: {"user":"bob","action":"login","session":"abc123","ts":1700000000}”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/json-jcs?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need server-side JCS (RFC 8785) canonicalization of JSON and either lack a local JCS library or are operating in an environment where running code locally is not possible. The description notes to prefer the unpaid POST /v1/sandbox/json-jcs first — use this paid endpoint when the sandbox is unavailable or for production workloads. It costs $0.004 USDC per call and runs without any network side effects.
Side effects
- Invalid or malformed JSON input returns an error (not parseable JSON)
- Input exceeding 100,000 characters is rejected
- Empty string input is rejected (minLength:1)
- Network/service unavailability returns an HTTP error
- Payment failure (insufficient USDC) results in a 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Input for this SKU. The route description says whether it is plain text, a URL, base64 bytes, or an already-encoded token. |
Tags
x402
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