Functional and integration
Real user journeys chained across endpoints, with data carried from one call to the next.
REST Assured · Karate · Postman
We test what the response means, not just that it arrived
Contract-level REST API testing: request and response validation, auth, error handling and regression suites that run in your CI/CD pipeline and fail on the defect, not the status code.
{ "orderId": "ord_8871", "status": "CONFIRMED", "items": 2, "subtotal": 1900.00, "discount": 190.00, "total": 1900.00,✕ expected 1710.00 "currency": "INR"}
Every endpoint is checked on six layers. A response passes only when all of them agree.
Real user journeys chained across endpoints, with data carried from one call to the next.
Field values, types and business rules, asserted field by field against the expected result.
Each failure path returns the right code, a useful error body and nothing it should not.
Tokens, scopes, expiry and tenant isolation. The checks that keep one customer out of another's data.
Responses validated against your JSON schema or OpenAPI spec, so contract drift fails the build.
Response times measured per endpoint under realistic load, with p95 tracked against your SLA.
From spec to report, every run follows the same five stages. Select a stage to see what happens inside it.
Compare how Postman and REST Assured handle the same login API test, from submitting credentials to validating the response.
Five requests, five send-and-response cycles
One data-driven test, five cases in a single run
Same five fictional accounts, same simulated login API, same results on both sides. We use both tools and choose per team and pipeline.
One business rule, written in the framework your team already reads. We choose the tool for your stack, then hold every suite to the same assertions.
When we pick itJava teams, or suites that live next to Selenium or Playwright UI tests and share one Maven build, one data layer and one Allure report.
14@Test(groups = "regression") 15public void orderTotalAppliesPromo() { 16 given().spec(authSpec) 17 .body(Payloads.order("SKU-2231", 2, "SAVE10")) 18 .when() 19 .post("/api/v1/orders") 20 .then() 21 .statusCode(201) 22 .contentType(ContentType.JSON) 23 .body(matchesJsonSchemaInClasspath("schemas/order.json")) 24 .body("discount", equalTo(190.00f)) 25 .body("total", equalTo(1710.00f)) 26 .time(lessThan(800L)); 27}
14@Test(groups = "regression") 15public void orderTotalAppliesPromo() { 16 given().spec(authSpec) 17 .body(Payloads.order("SKU-2231", 2, "SAVE10")) 18 .when() 19 .post("/api/v1/orders") 20 .then() 21 .statusCode(201) 22 .contentType(ContentType.JSON) 23 .body(matchesJsonSchemaInClasspath("schemas/order.json")) 24 .body("discount", equalTo(190.00f)) 25 .body("total", equalTo(1710.00f)) 26 .time(lessThan(800L)); 27}
1Feature: Orders API 2 3 Background: 4 * url baseUrl 5 * header Authorization = 'Bearer ' + token 6 7 Scenario: order total applies promo 8 Given path 'api', 'v1', 'orders' 9 And request { sku: 'SKU-2231', qty: 2, promo: 'SAVE10' } 10 When method post 11 Then status 201 12 And match response == read('schemas/order.json') 13 And match response.discount == 190.00 14 And match response.total == 1710.00 15 And assert responseTime < 800
1pm.test("201 Created", () => pm.response.to.have.status(201)); 2 3pm.test("matches order schema", () => { 4 pm.response.to.have.jsonSchema( 5 JSON.parse(pm.collectionVariables.get("orderSchema"))); 6}); 7 8pm.test("promo applied to total", () => { 9 const b = pm.response.json(); 10 pm.expect(b.discount).to.eql(190.00); 11 pm.expect(b.total).to.eql(1710.00); 12}); 13 14pm.test("under 800 ms", () => 15 pm.expect(pm.response.responseTime).to.be.below(800));
Fast contract checks gate every merge. Deeper suites run on a schedule. Nobody has to remember to press run.
Auth, core endpoints and schema checks. Red means no merge.
Suites mapped to the services a change touches, positive and negative.
Every endpoint, every boundary case. Failures open tickets with evidence.
Response times under load compared with the last release.
Our marketplace tool expertise, but not limited to these.
Still deciding? Ask us directly.
Functional and integration testing of REST endpoints, request and response validation, status-code and error-handling checks, header and authentication testing, JSON schema validation, negative and boundary testing, regression suites, performance and load testing, CI/CD integration and reporting.
We pick tools for your stack. Common choices are REST Assured for Java teams, Karate for readable BDD-style suites, and Postman with Newman for collection-based testing, plus SoapUI, WireMock for service virtualisation and JMeter for load.
Yes. We wire suites into Jenkins, GitLab CI, CircleCI, Travis CI or Azure DevOps, so contract checks run on every commit and full regression runs on a schedule, with results published to Allure, TestRail, Qase or Jira.
API tests run faster, fail closer to the defect and cover business rules, error paths and access control that the UI never exercises. A broken total or a leaked record is caught before any screen renders it.
Tell us where you are worried about exposure. We will walk one real path through your application with you.
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