# Scout Packs Email/Domain Deliverability Scorer

> Scout Packs Email/Domain Deliverability Scorer is a paid API for AI agents from scout-packs-production.up.railway.app, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-11).

Scores an email address or domain for deliverability, returning a numeric score, verdict, and validation checks (MX, syntax, etc.)

## Facts

- Endpoint: GET https://scout-packs-production.up.railway.app/deliverability?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/scout-packs-email-domain-deliverability-scorer-3f8c600d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TJdMQQ9fvMnRtDjdPXdc5

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 scout-packs-email-domain-deliverability-scorer-3f8c600d
```

Example prompt: Can you check whether jane@acme.com is actually deliverable — I want to know if it'll bounce before I send an outreach email?

## When to prefer this

Use this endpoint when you need a quick, per-address deliverability score before sending outreach, validating imported lead lists, or gating B2B contact data quality. It requires no account or API key — pay $0.03 USDC per call via x402 on Base. Prefer this over full email verification suites when you need lightweight, per-lead scoring without subscription overhead, especially inside agent workflows doing real-time lead enrichment.

## Known failure modes

- Missing both email and domain parameters — returns error requiring one of the two
- Both email and domain provided simultaneously — schema requires one or the other
- Invalid email format — may return low score or syntax check failure
- Domain with no MX records — returns non-deliverable verdict with mx:false
- Payment failure via x402/USDC — request rejected before processing
- Unresolvable or nonexistent domain — returns failed checks and low score

## How this service works

Verified B2B lead packs and per-lead enrichment lookups for agents. $0.01 per lookup or pack (demand probe). USDC on Base via x402. No account, API key, or subscription.

## Output

Returns a JSON object with a numeric deliverability score (0–1), a verdict string (e.g. 'deliverable'), a checks object indicating whether MX and syntax validations passed, an array of flags for any issues found, and a receipt field confirming the paid lookup.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "email": {
       "type": "string",
       "description": "Email address to score (e.g. 'jane@acme.com'). Use email OR domain, not both."
      },
      "domain": {
       "type": "string",
       "description": "Domain to score (e.g. 'acme.com'). Use email OR domain, not both."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "flags": {
       "type": "array"
      },
      "score": {
       "type": "number"
      },
      "checks": {
       "type": "object"
      },
      "receipt": {
       "type": "string"
      },
      "verdict": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "flags": [],
  "score": 0.92,
  "checks": {
   "mx": true,
   "syntax": true
  },
  "receipt": "ok",
  "verdict": "deliverable"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/scout-packs-email-domain-deliverability-scorer-3f8c600d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from scout-packs-production.up.railway.app](https://www.zero.xyz/host/scout-packs-production.up.railway.app/llms.txt)