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JSON Object Pick
x402
JSON Object Pick is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Filters a JSON object to retain only the specified top-level keys, returning a clean subset of the original object
Price / call$0.001
Success—
StatusUnknown
How this service works
JSON Object Pick: JSON Object Pick keeps selected top-level keys from one JSON object from bounded caller-supplied values without an external provider. Call JSON Object Pick before an agent hands structured data or a batch plan to a downstream tool with a stricter contract. Returns the bounded transformation or validation finding with counts, normalized values, and a versioned result contract for JSON Object Pick as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party,…
Output
A versioned deterministic JSON result containing the filtered object with only the requested top-level keys present, along with metadata such as key counts, normalized values, and a versioned result contract identifier. Keys not found in the source object are omitted gracefully.
Example use cases
Trim payload before downstream API call
“I have a large JSON object with 20 fields but the downstream service only accepts 'id', 'status', and 'amount' — can you pick just those three keys from my object and give me the filtered result to send along?”
Whitelist PII fields before logging
“Before we log this user record, strip everything except 'userId' and 'timestamp' from this JSON — I don't want 'email', 'phone', or 'address' ending up in the logs.”
Reduce API response for agent handoff
“The payment API returned a huge response object but the next step in my workflow only needs 'transactionId' and 'confirmedAt' — can you pick just those keys from the JSON and hand that slim object to the next tool?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/json-object-pickWhen to prefer
Choose this endpoint when you need a fast, deterministic, stateless filter of top-level keys from a JSON object before handing data to a downstream tool with a strict schema contract. It is ideal when you want an auditable, versioned record of the transformation (not just an in-memory slice) and when you are already operating in an x402/Base payment context. Prefer it over ad-hoc in-agent object filtering when you need guaranteed bounded execution, count metadata, and a versioned result for compliance or debugging purposes.
Side effects
- Keys array exceeds 256 items — request rejected
- Source object exceeds 128 top-level properties — request rejected
- Key name string exceeds 8192 characters — request rejected
- Payment of $0.001 USDC via x402 on Base fails or is not included — 402 response
- Malformed JSON body — 400 bad request
- None of the requested keys exist in the object — empty filtered object returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| keys | array | Keys supplied to JSON Object Pick; used only for this bounded calculation and processed in memory without retention. |
| object | object | Object supplied to JSON Object Pick; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"object": {
"id": 1,
"name": "A"
},
"key_count": 2
},
"schema": "delx/util-json-object-pick/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "1a7f9253ab434afa84b8a0eabd2599e98f2f96ace45abb5e67ffeac9897a7d88",
"external_calls": 0
},
"operation": "data_batch:json_object_pick"
}
}Tags
x402
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