Domailfix for developers
Quick answer
Developers use the Domailfix REST API to verify email addresses at sign-up, clean lists in background jobs, find work emails and check phone numbers, with one API key, plain JSON answers and the same pay-as-you-go credits as the website.
The problem
Fake and mistyped emails at sign-up mean failed onboarding emails, fake accounts and wasted free trials. Building your own checks is hard to get right and harder to keep right.
How Domailfix helps
- A simple REST API with one API key in a header and plain JSON answers.
- Verify one email in real time at sign-up, or send a list as a background job and fetch the results as JSON or CSV.
- Find emails from a name and company website, one or many at a time.
- Email format, domain search and phone checks from the same API.
- Unknown results are free, and you only pay for answers.
- AI-ready: add Domailfix to Claude, ChatGPT or Gemini, and let your AI assistant call it for you.
Quick start
- Create an API key under API key in your account.
- Verify an address:
curl 'https://domailfix.com/api/verify?email=priya@acme.com' -H 'X-API-Key: YOUR_KEY'
- Read the status (deliverable, undeliverable, risky or unknown), the score and the Email X-ray fields.
- See every endpoint in the API docs.
Tools that fit
- The API docs and docs.
- The website form widget if you want checks on your forms with one line of code.
- n8n, Make and Zapier for no-code workflows.
FAQ
How do I authenticate?
Send your API key as the X-API-Key header, or as Authorization: Bearer followed by the key.
Can I verify a list through the API?
Yes. Start a bulk job, check its progress, and download the results as JSON or CSV when it finishes.