# Verify up to 50 addresses in one call

`POST /api/v1/email/batch`

- Authentication: Secret API key as a bearer token
- Billing: Each address bills like a single lookup — 1 credit for a fresh deliverable or risky verdict, everything else free — and the call stops cleanly where the balance ends.
- Group: Email

Verifies a list synchronously under the exact single-lookup billing rules. Every address is prepared first, then all the mailbox probes that are still needed are sent to the verification provider together, so a full batch takes about as long as a handful of single lookups. `data.results[]` mirrors the single-address response per item, in input order, and each item's `meta` carries `credits_used`, `cache_hit`, and `suppressed`.

Addresses on your suppression list are served from the stored verdict at no cost and marked `suppressed: true`. Repeats inside the list are verified once. The list is walked in order and stops where the balance would run out: running out of credits mid-batch returns the paid partial results with `meta.stopped_reason: "insufficient_credits"` and `processed` lower than `requested`, never discarding billed work. Only a batch whose first lookup is refused answers the typed `402`.

A batch counts as one request against the rate limit.

## Request body

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `emails` | string[] | yes | 1 to 50 addresses; each item at most 254 characters. |

## Example request

```bash
curl -X POST https://spaw.co/api/v1/email/batch \
  -H "Authorization: Bearer sk_live_…" \
  -H "Content-Type: application/json" \
  -d '{
  "emails": [
    "mia@acme.com",
    "info@example.org",
    "deliverable@spaw.test"
  ]
}'
```

## Responses

### 200 — One result per processed address, plus the batch totals.

```json
{
    "success": true,
    "data": {
        "results": [
            {
                "data": {
                    "email": "mia@acme.com",
                    "deliverable": "deliverable",
                    "reason": null,
                    "risk_score": 0,
                    "risk_level": "low"
                },
                "meta": {
                    "credits_used": 1,
                    "cache_hit": false,
                    "suppressed": false
                }
            },
            {
                "data": {
                    "email": "info@example.org",
                    "deliverable": "risky",
                    "reason": "role",
                    "risk_score": 30,
                    "risk_level": "medium"
                },
                "meta": {
                    "credits_used": 1,
                    "cache_hit": false,
                    "suppressed": false
                }
            },
            {
                "data": {
                    "email": "deliverable@spaw.test",
                    "deliverable": "deliverable",
                    "reason": null,
                    "risk_score": 0,
                    "risk_level": "low"
                },
                "meta": {
                    "credits_used": 0,
                    "cache_hit": false,
                    "suppressed": false
                }
            }
        ]
    },
    "meta": {
        "requested": 3,
        "processed": 3,
        "credits_used": 2,
        "credits_remaining": 7,
        "stopped_reason": null,
        "request_id": "req_01m1kgdrtqdvwnks99vfgx2rcw"
    }
}
```

### 401 — The key is missing, malformed, or revoked.

```json
{
    "success": false,
    "error": {
        "code": "UNAUTHENTICATED",
        "message": "Provide a valid API key as a bearer token.",
        "request_id": "req_01m1kgdm4xngzmbmff68g94w0c"
    }
}
```

### 402 — The balance is empty. The lookup did not run.

```json
{
    "success": false,
    "error": {
        "code": "INSUFFICIENT_CREDITS",
        "message": "Your credit balance is empty.",
        "request_id": "req_01m1kgdm4xngzmbmff68g94w0c"
    }
}
```

### 422 — The request body could not be validated; `error.errors` lists the fields.

```json
{
    "success": false,
    "error": {
        "code": "VALIDATION_FAILED",
        "message": "The email field is required.",
        "errors": {
            "email": [
                "The email field is required."
            ]
        },
        "request_id": "req_01m1kgdm4xngzmbmff68g94w0c"
    }
}
```

### 429 — Over 5 requests per second for the key. Retry after the limit resets.

```json
{
    "success": false,
    "error": {
        "code": "RATE_LIMITED",
        "message": "Too many requests. Retry after the limit resets.",
        "request_id": "req_01m1kgdm4xngzmbmff68g94w0c"
    }
}
```

## Error codes

- `UNAUTHENTICATED` — https://spaw.co/docs/errors/UNAUTHENTICATED
- `VALIDATION_FAILED` — https://spaw.co/docs/errors/VALIDATION_FAILED
- `INSUFFICIENT_CREDITS` — https://spaw.co/docs/errors/INSUFFICIENT_CREDITS
- `RATE_LIMITED` — https://spaw.co/docs/errors/RATE_LIMITED

---

Canonical page: https://spaw.co/docs/api/verify-email-batch · OpenAPI document: https://spaw.co/openapi.json · All endpoints: https://spaw.co/docs/api