Verify API contracts against live providers with hitspec’s built-in contract testing support.
Contract testing verifies that an API provider honors the agreements (contracts) defined by its consumers. hitspec supports consumer-driven contract testing using standard .http files annotated with contract metadata.
How It Works
Define expected interactions in .http files with contract annotations
Run hitspec contract verify against a live provider
hitspec sends each request and validates the response against your assertions
Contract Annotations
Add contract metadata to your requests using custom annotations:
### Get user by ID# @name getUserById# @contract.provider UserService# @contract.state "user exists with id 1"GET {{baseUrl}}/users/1>>>expect status 200expect body.id == 1expect body.name type stringexpect body.email type string<<<
Annotation
Description
@contract.provider
Name of the provider service
@contract.state
Provider state that must be set up before the interaction
Running Contract Verification
# Verify contracts against a providerhitspec contract verify contracts/ --provider http://localhost:3000# With a state handler scripthitspec contract verify contracts/ \ --provider http://localhost:3000 \ --state-handler ./setup-states.sh# Verbose outputhitspec contract verify contracts/ --provider http://localhost:3000 -v
State Handlers
A state handler is an executable script that sets up the provider’s state before each interaction. hitspec calls it with the state description as an argument:
#!/bin/bash# setup-states.shcase "$1" in "user exists with id 1") curl -s -X POST http://localhost:3000/test/seed-user -d '{"id": 1, "name": "John"}' > /dev/null ;; "no users exist") curl -s -X POST http://localhost:3000/test/clear-users > /dev/null ;;esac
On Windows, a script that is not a .exe, .bat, .cmd or .com file runs through sh from Git for Windows, so the same .sh handler works there when Git is installed.
CLI Reference
hitspec contract verify <contracts-dir> [flags]
Flag
Short
Description
Required
--provider
-p
Provider URL
Yes
--state-handler
Path to state handler script
No
--verbose
-v
Verbose output
No
Example Contract File
@baseUrl = {{baseUrl}}### List all users# @name listUsers# @contract.provider UserServiceGET {{baseUrl}}/users>>>expect status 200expect body type arrayexpect body length >= 0<<<### Create a user# @name createUser# @contract.provider UserService# @contract.state "database is empty"POST {{baseUrl}}/usersContent-Type: application/json{ "name": "Jane Doe", "email": "jane@example.com"}>>>expect status 201expect body.id existsexpect body.name == "Jane Doe"<<<
Keep contract files in a dedicated contracts/ directory, separate from your integration tests. This makes it clear which tests define API agreements vs. which tests validate behavior.
Last modified on October 19, 2026
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`}),_jsx(_components.span,{style:{color:`#0550AE`,\"--shiki-dark\":`#9CDCFE`},children:`@name`}),_jsx(_components.span,{style:{color:`#953800`,\"--shiki-dark\":`#4EC9B0`},children:` listUsers`})]}),`\n`,_jsx(_components.span,{className:`line`,children:_jsx(_components.span,{style:{color:`#6E7781`,\"--shiki-dark\":`#6A9955`},children:`# @contract.provider UserService`})}),`\n`,_jsx(_components.span,{className:`line`}),`\n`,_jsxs(_components.span,{className:`line`,children:[_jsx(_components.span,{style:{color:`#CF222E`,\"--shiki-dark\":`#C586C0`},children:`GET`}),_jsx(_components.span,{style:{color:`#1F2328`,\"--shiki-dark\":`#D4D4D4`},children:` 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