{
  "format": "delx/intent-card/v1",
  "id": "json-array-filter-keys-api",
  "intent": "JSON Array Filter Keys for an agent workflow",
  "title": "JSON Array Filter Keys API for agents",
  "description": "JSON Array Filter Keys: JSON Array Filter Keys keeps object rows whose selected key matches caller values from bounded caller-supplied values without an external provider. Call JSON Array Filter Keys 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 Array Filter Keys as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, stateless, memory-only execution with no paid upstream, live RPC, web search, credentials, custody, signing, media generator, or input retention. Honest limit: Processes bounded caller-supplied data in memory only; it performs no file fetch, database write, code execution, or retention. Advisory output only; the buyer owns authorization, payment policy, and production decisions.",
  "keywords": [
    "JSON Array Filter Keys API",
    "JSON Array Filter Keys for agents",
    "pay per result API",
    "x402 API",
    "no API key"
  ],
  "updated_at": "2026-08-23",
  "canonical_url": "https://commerce.delx.ai/intents/json-array-filter-keys-api",
  "machine_url": "https://commerce.delx.ai/intents/json-array-filter-keys-api.json",
  "recommendation": {
    "tool_name": "util_json_array_filter_keys",
    "service_name": "JSON Array Filter Keys",
    "method": "POST",
    "resource": "https://api.delx.ai/api/v1/x402/json-array-filter-keys",
    "price_usdc": "0.001",
    "payment_protocols": [
      "x402",
      "mpp"
    ],
    "input_schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "type": "object",
      "properties": {
        "items": {
          "type": "array",
          "maxItems": 256,
          "items": {
            "type": "object",
            "maxProperties": 128,
            "additionalProperties": true
          },
          "description": "Items supplied to JSON Array Filter Keys; used only for this bounded calculation and processed in memory without retention."
        },
        "key": {
          "type": "string",
          "maxLength": 8192,
          "description": "Key supplied to JSON Array Filter Keys; used only for this bounded calculation and processed in memory without retention."
        },
        "allowed": {
          "type": "array",
          "maxItems": 256,
          "items": {
            "type": "string",
            "maxLength": 8192
          },
          "description": "Allowed supplied to JSON Array Filter Keys; used only for this bounded calculation and processed in memory without retention."
        }
      },
      "required": [
        "items",
        "key",
        "allowed"
      ],
      "additionalProperties": false
    },
    "example_input": {
      "items": [
        {
          "status": "ok",
          "id": 1
        },
        {
          "status": "bad",
          "id": 2
        }
      ],
      "key": "status",
      "allowed": [
        "ok"
      ]
    },
    "example_output": {
      "schema": "delx/util-json-array-filter-keys/v1",
      "operation": "data_batch:json_array_filter_keys",
      "status": "pass",
      "result": {
        "items": [
          {
            "status": "ok",
            "id": 1
          }
        ],
        "matched_count": 1
      },
      "evidence": {
        "input_sha256": "c1b64d403dd4df4223045c843cca745575ec8fc78aca3b171b5d12f60601eb75",
        "retained": false,
        "external_calls": 0
      }
    },
    "agentcash": {
      "buy": "npx agentcash@latest fetch https://api.delx.ai/api/v1/x402/json-array-filter-keys -m POST -H 'x-delx-source: intent-card-json-array-filter-keys-api' --max-amount 0.001 -b '{\"items\":[{\"status\":\"ok\",\"id\":1},{\"status\":\"bad\",\"id\":2}],\"key\":\"status\",\"allowed\":[\"ok\"]}'",
      "max_amount_usdc": "0.001"
    }
  },
  "attribution": {
    "header": "x-delx-source",
    "value": "intent-card-json-array-filter-keys-api"
  },
  "evidence": {
    "paid_openapi": "https://api.delx.ai/openapi.x402.json",
    "governed_portfolio": "https://api.delx.ai/x402-portfolio.json",
    "live_contract": "https://api.delx.ai/api/v1/x402/json-array-filter-keys"
  }
}