API Contract Tester
6.6#9 in contract testing toolsFrom $19 a monthFree planWeb
VisitAPI Contract Tester vs Pact
What both publish
| Fact | API Contract Tester | Pact |
|---|---|---|
| Purpose | API Contract Tester verifies frontend-backend API contracts and detects schema mismatches, missing fields, and type incompatibilities. | Pact is a code-first tool for testing HTTP and message integrations with contract tests. |
API Contract Tester plans
- FreeFree
- Individual Dev$19 a month
- Pro AI Agent$49 a month
- Enterprise$499 a month
Pact plans
- PactFlow StarterFree
- Pact open-source toolingFree
- PactFlow Team (yearly)$115.42 a month
- PactFlow Team (monthly)$127 a month
- PactFlow EnterprisePriced on request
Pick API Contract Tester if…
It suits frontend and backend teams that want to verify responses against agreed schemas. Developers can use the web tool, a local MCP server, or pipeline checks.
Pick Pact if…
Pact suits development teams that control both the consumer and provider applications and want to test their integration contracts independently. It is generally implemented by developers.