# Email Syntax Check Bulk

> Email Syntax Check Bulk is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-14).

Validates the syntax of up to 20 email addresses in a single concurrent batch call, returning per-item results in input order with error counts.

## Facts

- Endpoint: GET https://intel.rallylive.ca/bulk/email/syntax
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/email-syntax-check-bulk-5c94d03a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HcKg_T5xOwIfrg4jyWvSh

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 email-syntax-check-bulk-5c94d03a
```

Example prompt: Can you syntax-check all these email addresses at once and tell me which ones are invalid: alice@example.com, bob@, carol@domain.co, dave.example.com, eve@test.org?

## When to prefer this

Use this endpoint when you have a list of 2–20 email addresses that all need syntax validation at once, saving multiple round-trips compared to calling the single /email/syntax endpoint repeatedly. Ideal for pre-import data cleaning, form submission batch processing, or mailing list quality checks where you need ordered results with per-item error detail.

## Known failure modes

- Input list exceeds 20 emails — batch size limit enforced
- Missing or malformed input parameter causes 400 error
- Payment not provided or insufficient — x402 payment required error
- Network timeout if concurrent checks take too long
- Individual items with non-string values may return per-item errors

## How this service works

Bulk email syntax check: up to 20 emails in one call, processed concurrently, results returned in input order with a per-item error field and a count of failures. Same answer per item as the single /email/syntax endpoint (Fast email syntax check). Batch enrichment for agents that hold a list. $0.01 per batch.

## Output

An ordered array of per-item validation results matching the input order, each containing whether the email syntax is valid or not and an error field describing any issue. A summary count of total failures is also returned.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/email-syntax-check-bulk-5c94d03a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from intel.rallylive.ca](https://www.zero.xyz/host/intel.rallylive.ca/llms.txt)