polymerdao/polymer-pay-stableenrich-hunter

Hunter (StableEnrich)

Hunter provides email verification capabilities through the Polymer Pay proxy via StableEnrich. Verify whether an email address is deliverable, risky, or invalid.

Authentication

All requests route through the Polymer Pay proxy. Include your Polymer Pay API key in every request:

{
  "headers": {
    "Content-Type": "application/json",
    "x-polymer-pay-api-key": "{{POLYMER_PAY_API_KEY}}"
  }
}

Base URL: https://pay.polymerlabs.org/proxy/https/stableenrich.dev

Common Operations

Email Verification

Verify whether an email address is deliverable, risky, or invalid. Checks MX records, SMTP response, and mailbox existence.

Pricing: $0.03

{
  "method": "POST",
  "url": "https://pay.polymerlabs.org/proxy/https/stableenrich.dev/api/hunter/email-verifier",
  "headers": {
    "Content-Type": "application/json",
    "x-polymer-pay-api-key": "{{POLYMER_PAY_API_KEY}}"
  },
  "body": {
    "email": "[email protected]"
  }
}

Response: JSON object with verification result (deliverable, risky, or undeliverable), confidence score, and details about MX records, SMTP check, and whether the address is a catch-all, disposable, or role-based.

When to Use

• Email verification — Check whether an email address is valid before sending outreach
• Reduce bounce rates — Verify emails to improve deliverability
• Lead quality — Ensure email addresses are valid before adding to marketing campaigns

Best Practices

• Verify before sending — Always verify emails before cold outreach to reduce bounce rates
• Check confidence scores — Use the confidence score to determine if an email is safe to use
• For errors — See @skills/polymer-pay-api-errors/SKILL.md for complete error code reference and troubleshooting