Assertible
The easiest way to test and monitor your web services
About Assertible
Assertible is an automated API testing and monitoring service that runs HTTP assertions against your APIs and websites across environments and deployments. You can import an OpenAPI/Swagger spec, Postman collection, or curl command to generate tests, then run them on a schedule or after every deploy, with alerts to Slack, PagerDuty, email, and GitHub status checks.
Pros & Cons
Pros
- Free-forever Personal plan covers small APIs with scheduled monitoring
- Flat per-account pricing with no per-user fees or monthly request caps
- Imports OpenAPI/Swagger specs and Postman collections and syncs tests when the spec changes
- Deployments API and GitHub status checks make post-deploy smoke testing straightforward
- Supports advanced assertions including JSON Schema, XPath, and jq transformations
- Same tests run across staging and production environments
Cons
- Product development appears slow; the public blog and changelog have not been updated since 2020
- Collaboration features are thinner than Postman's, and member counts are capped per plan
- Basic dashboards and reporting compared to larger API monitoring platforms
- Card-only payments; no PayPal or invoiced purchase orders
- Few independent user reviews available
Key Features
HTTP assertions
Validate status codes, headers, response times, JSON paths, JSON Schema, and XPath values for XML and HTML responses.
OpenAPI/Swagger and Postman import
Generate web services, tests, and JSON Schema assertions from an OpenAPI v2/v3 spec or Postman collection, and sync tests when the spec changes.
Post-deployment testing
A deployments API and GitHub deployment events trigger smoke tests automatically after each deploy to staging or production.
Multi-environment testing
Run the same test suite against development, staging, and production environments without duplicating tests.
Scheduled uptime monitoring
Run tests on a schedule to monitor API uptime, availability, and correctness, with configurable alerting.
Variables and jq scripting
Setup steps, dynamic and encrypted variables, and full jq syntax let you chain requests and transform data before tests run.
GraphQL support
Write and view GraphQL queries in the test editor to test GraphQL APIs.
Integrations and alerts
GitHub status checks, Slack notifications, PagerDuty incidents, Zapier triggers, and email hooks for test results.
Testing behind a firewall
Documented approaches for testing private APIs, localhost, and services behind a firewall.
Team organizations
Create an organization to share web services, tests, and failure alerts with team members.
Pricing
- 2 web services
- 10 tests per service
- 1,000 result retention
- 1-2 members
- Standard schedule frequency (2 monitors)
- 25 web services
- 500 tests per service
- 5,000 result retention
- 1 member
- Upgraded schedule frequency
- 1-month free trial
- 25 web services
- 500 tests per service
- 5,000 result retention
- 10 members
- Upgraded schedule frequency
- 1-month free trial
- 50 web services
- 1,000 tests per service
- 10,000 result retention
- 20 members
- Upgraded schedule frequency
- 1-month free trial
Best For
Post-deploy smoke tests
Send a deployment event from CI or GitHub to automatically run API tests against staging or production after each release.
API uptime monitoring
Schedule tests against critical endpoints and alert the team through Slack, PagerDuty, or email when assertions fail.
Contract testing from an OpenAPI spec
Import an OpenAPI definition to generate JSON Schema assertions and keep tests in sync as the spec evolves.
GitHub pull request checks
Report API test results as GitHub status checks so failing endpoints block merges.
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