# JSON Email Fields Check

> JSON Email Fields Check is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Validates and normalizes email address fields within a JSON object or array of field values, returning counts, normalized values, and a versioned deterministic result.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/json-email-fields-check
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/json-email-fields-check-8be7e73e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qvi0HS-mMXA1YLssfRZPH

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability json-email-fields-check-8be7e73e -d '<json body>'
```

Example prompt: Before sending this user record to the CRM, check the email fields — 'email' and 'backup_email' — in this JSON object to make sure they're valid email addresses and give me the normalized values and any issues found.

## When to prefer this

Choose this endpoint when you need a lightweight, self-contained, in-memory email format check on specific fields of a JSON object without relying on an external email validation service. It is especially well-suited as a pre-flight gate before handing structured data to a downstream tool with a strict contract, or when you need deterministic, versioned validation results for auditability. Prefer alternatives if you need MX record verification, deliverability scoring, or bulk email list enrichment.

## Known failure modes

- Field names provided do not exist in the supplied object — endpoint may return zero matches or empty findings
- Malformed input JSON object causing a parse or schema error
- Fields array exceeds 256 items or object exceeds 128 properties — returns a bounds error
- Email strings that are syntactically ambiguous may yield indeterminate validation results
- Network or payment (x402) failure before the call completes

## How this service works

JSON Email Fields Check: JSON Email Fields Check checks selected fields for bounded email address shape from bounded caller-supplied values without an external provider. Call JSON Email Fields Check 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 Email Fields Check as versioned deterministic JSON. Price: $0.001 USD…

## Output

Returns a versioned deterministic JSON result containing: validation findings per field (pass/fail), normalized email values, counts of valid vs. invalid entries, and a versioned result contract identifier. No external calls or data retention occur.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "fields": {
   "type": "array",
   "items": {
    "type": "string",
    "maxLength": 8192
   },
   "maxItems": 256,
   "description": "Fields supplied to JSON Email Fields Check; used only for this bounded calculation and processed in memory without retention."
  },
  "object": {
   "type": "object",
   "description": "Object supplied to JSON Email Fields Check; used only for this bounded calculation and processed in memory without retention.",
   "maxProperties": 128,
   "additionalProperties": true
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "passed": true,
   "invalid_fields": []
  },
  "schema": "delx/util-json-email-fields-check/v1",
  "status": "pass",
  "evidence": {
   "retained": false,
   "input_sha256": "14a697153fc689e4765cb0c2d3675e79a6a20064fbebc18292ed7e83b508bf1e",
   "external_calls": 0
  },
  "operation": "data_batch:json_email_fields_check"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/json-email-fields-check-8be7e73e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)