Email on Acid

name: Email on Acid
description: Email on Acid (now branded as Mailgun Inspect) is an email testing and pre-deployment quality assurance platform
  with a REST API for rendering email previews across 100+ email clients and devices, checking accessibility compliance (WCAG
  2.2), validating HTML/CSS compatibility, running spam filter analysis, and automating pre-send email testing workflows via
  HTTP Basic Authentication.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
url: https://raw.githubusercontent.com/api-evangelist/email-on-acid/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.19'
aid: email-on-acid
type: Index
tags:
- Email Testing
- Email Previews
- Email Clients
- Spam Testing
- Accessibility
- HTML Validation
- Email Quality Assurance
- Pre-Deployment Testing
apis:
- name: Email on Acid API
  description: REST API for automating email testing across 100+ email clients and devices, including email rendering previews,
    spam filter testing, seed list management, and accessibility checks. Supports sandbox mode for development and test result
    storage for 90 days.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://api.emailonacid.com/docs/latest
  baseURL: https://api.emailonacid.com/v5
  tags:
  - Email Testing
  - Email Previews
  - Spam Testing
  - Email Clients
  - Rendering
  properties:
  - type: Documentation
    url: https://api.emailonacid.com/docs/latest
  - type: OpenAPI
    url: https://raw.githubusercontent.com/api-evangelist/email-on-acid/refs/heads/main/openapi/email-on-acid-openapi.yml
  contact:
  - FN: Email on Acid Support
    url: https://www.emailonacid.com/contact/
common:
- type: Website
  url: https://www.emailonacid.com
- type: Documentation
  url: https://api.emailonacid.com/docs/latest
- type: GitHubOrg
  url: https://github.com/emailonacid
- type: LinkedIn
  url: https://www.linkedin.com/company/email-on-acid
- type: Blog
  url: https://www.emailonacid.com/blog/
- type: Pricing
  url: https://www.emailonacid.com/pricing/
- type: StatusPage
  url: https://status.emailonacid.com/
- type: X
  url: https://twitter.com/EmailOnAcid
- type: Plans
  url: plans/email-on-acid-plans-pricing.yml
- type: RateLimits
  url: rate-limits/email-on-acid-rate-limits.yml
- type: FinOps
  url: finops/email-on-acid-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com