# InboxPolicy Send-Decision Email Verification API

> InboxPolicy Send-Decision Email Verification API is a paid API for AI agents from api.inboxpolicy.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-13).

Verifies a batch of email addresses and returns a send/review/avoid decision with supporting evidence for each address.

## Facts

- Endpoint: POST https://api.inboxpolicy.com/v1/batches/verify?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/inboxpolicy-send-decision-email-verification-api-5568e02d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ssTrPpY1m-xPas2OqiBr7

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 inboxpolicy-send-decision-email-verification-api-5568e02d -d '<json body>'
```

Example prompt: Verify this list of 200 email addresses for me and tell me which ones I should send to, which need review, and which to avoid — I want standard strictness.

## When to prefer this

Choose this endpoint when you need an actionable send/review/avoid decision on email addresses — not just a syntax check — and want evidence-backed results at scale (up to 5000 per call) with no account or API key required. Ideal for pre-campaign list cleaning, cold outreach hygiene, or automated sign-up validation pipelines where pay-per-use at $0.01/address fits better than a subscription.

## Known failure modes

- Invalid or malformed email addresses in input array may cause partial failures or skipped entries
- Batch size exceeding 5000 addresses will be rejected
- Payment failure via x402 will prevent batch from being processed
- Webhook URL misconfiguration may cause silent completion notification failures
- Polling with an incorrect or expired access_token will return unauthorized errors
- Network timeout on large batches requiring extended polling

## How this service works

Email verification API that returns a decision — send, review, or avoid — with evidence. $0.01/call via x402, no account. Free 72h re-verification.

## Output

Returns a batch_id, queued status, total item count, amount charged in USD, and a keyless access_token used to poll for results via the x-batch-access-token header. Once processing completes, each email receives a send/review/avoid decision with supporting evidence.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "emails"
 ],
 "properties": {
  "emails": {
   "type": "array",
   "description": "Up to 5000 addresses; total price is count x the per-email rate."
  },
  "strictness": {
   "enum": [
    "aggressive",
    "default",
    "strict"
   ],
   "type": "string"
  },
  "webhook_url": {
   "type": "string",
   "description": "Optional signed completion webhook."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "batch_id",
  "status",
  "total_items",
  "access_token"
 ],
 "properties": {
  "status": {
   "type": "string",
   "example": "queued"
  },
  "batch_id": {
   "type": "string",
   "example": "bat_..."
  },
  "amount_usd": {
   "type": "number"
  },
  "total_items": {
   "type": "integer"
  },
  "access_token": {
   "type": "string",
   "description": "Keyless polling credential; send as x-batch-access-token."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/inboxpolicy-send-decision-email-verification-api-5568e02d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.inboxpolicy.com](https://www.zero.xyz/host/api.inboxpolicy.com/llms.txt)