Email Reputation Score

Score an email address from 0 to 100 for risk, from domain age, mail server setup, disposable domains and the provider's reputation.

Pay by wallet (x402) email-reputation-score

Example

Input

{
  "email": "[email protected]"
}

Answer

{
  "email": "[email protected]",
  "domain": "google.com",
  "factors": [
    {
      "detail": "Custom domain — likely corporate email",
      "factor": "custom_domain",
      "impact": 5
    },
    {
      "detail": "1 MX record(s) found",
      "factor": "valid_mx",
      "impact": 10
    },
    {
      "detail": "Local part suggests non-personal address",
      "factor": "suspicious_local",
      "impact": -10
    }
  ],
  "risk_level": "medium",
  "email_valid": true,
  "provider_type": "custom",
  "reputation_score": 55
}

Inputs

Field	Type	Required	What it is
`email`	string	Yes	Email address to score

Output fields

How reliably each field appears in a successful answer.

Field	Type	Appears
`email`	string	Always (present in every successful answer)
`factors`	array	Always (present in every successful answer)
`risk_level`	string	Always (present in every successful answer)
`email_valid`	boolean	Always (present in every successful answer)
`reputation_score`	integer	Always (present in every successful answer)
`domain`	—	Always (present in every successful answer)
`provider_type`	—	Always (present in every successful answer)

How to call it

The same tool through each route. MCP clients reach it through Strale’s server at https://api.strale.io/mcp; the call below is what the agent sends.

# Needs an API key. max_price_cents caps what this call may cost.
curl -X POST https://api.strale.io/v1/do \
  -H "Authorization: Bearer $STRALE_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
    "capability_slug": "email-reputation-score",
    "inputs": {
      "email": "[email protected]"
    },
    "max_price_cents": 3
  }'

{
  "tool": "strale_execute",
  "arguments": {
    "slug": "email-reputation-score",
    "inputs": {
      "email": "[email protected]"
    },
    "max_price_cents": 3
  }
}

import { Strale } from "straleio";

const strale = new Strale({ apiKey: process.env.STRALE_API_KEY! });
const result = await strale.do({
  capability_slug: "email-reputation-score",
  inputs: {
    "email": "[email protected]"
  },
  max_price_cents: 3,
});

import os
from straleio import Strale, DoRequest

strale = Strale(api_key=os.environ["STRALE_API_KEY"])
result = strale.do(DoRequest(
    capability_slug="email-reputation-score",
    inputs={
        "email": "[email protected]",
    },
    max_price_cents=3,
))

# No account. The first request answers 402 with the price in USDC;
# an x402 client pays it from your wallet and repeats the request.
curl -i 'https://api.strale.io/x402/v2/email-reputation-score?email=test%40google.com'

Limitations

Heuristic scoring
Score is based on domain signals — not a guarantee of email deliverability or sender trustworthiness
MX lookup may fail
DNS MX lookup can fail due to network issues — score adjusts accordingly