API security testing in Chennai
In Chennai, APIs connect factories to dealers, banks to fintechs and exporters to their overseas clients, and many were built for one integration and never reviewed again. BERRY9 tests them remotely from Hyderabad, our only office, with and without a login, and begins by listing the ones nobody remembers.
- Typical duration
- 5 to 10 working days
- Testing
- Manual, by engineers
- Report
- Executive + engineering
- Delivery
- Remote from Hyderabad, visits by arrangement
Last reviewed
01 / Local need
Why Chennai companies need their APIs tested
Integration is how Chennai's industries work, and each integration is an interface to test.
An auto-component maker exchanges orders, schedules and invoices with dealers and large customers through endpoints that were agreed years ago. A bank or fintech exposes interfaces to partners, aggregators and its own apps. An IT exporter builds APIs for a client and keeps running the old versions long after the project moves on. In each case the API answers requests from outside the company, and the people who built it may have left.
Two practical points shape most Chennai API engagements. First, the people who built an interface are often at a vendor or have moved on, so we ask early for a contact who can explain how each gateway is configured and who may approve a change. Second, older exchanges were designed when the only caller was a trusted partner, so they return more data than a modern review would allow and often have no limit on how fast they can be called. For the method, see the API security testing page; for the city, see VAPT services in Chennai.
02 / Scope
Interfaces that dominate our Chennai API work
Six kinds of interface account for most of it.
Dealer and customer integrations
Order, schedule and invoice endpoints shared with dealers and large customers. We test what each partner credential can read or change, and whether one partner can reach another's records.
Bank and fintech partner APIs
Interfaces to aggregators, payment providers and partner banks. We check signatures, replay protection, callbacks and the data returned beyond what the partner needs.
EDI gateways and file exchanges
Older exchanges over files or message gateways. We test authentication, tampering and what the receiver does with a malformed or hostile document.
Client-specific APIs from IT exporters
APIs built for one overseas client and left running. We find old versions and test them against the same rules as the current one.
Mobile backends
The calls made by customer and field apps. We replay them with other users' identifiers, without tokens and with administrator tokens.
Internal APIs exposed by accident
Service-to-service endpoints reachable from the internet, with debug routes and verbose errors. We find them from apps, scripts and public records.
03 / From our guide
From our guide: inventory and data exposure
Two checks matter most for the long-lived integrations common in Chennai: finding every endpoint, and comparing what each response contains with what the receiver needs. This is how our checklist covers them.
Start with an inventory
List every API your organization exposes, then look for the ones that are not on the list:
- Old versions. /v1/ stays live after /v3/ ships, often without the newer checks.
- Shadow APIs. Endpoints used by a mobile app or an admin screen that were never documented.
- Documentation left open. Swagger and OpenAPI pages, GraphQL introspection and Postman collections that describe every call to anyone who asks.
- Test and staging hosts reachable from the internet with production data.
- Third-party APIs your product calls and trusts.
Testers find these from the mobile app, the web front end, public repositories, DNS records and old documentation. Every endpoint found is added to scope, with your agreement.
Data exposure
Compare what the response contains with what the screen shows. APIs often return full records and rely on the app to hide fields. Look for personal data, internal identifiers, tokens and debugging information in responses and error messages.
Older gateways tend to send entire records and expect the receiving system to ignore the extras, which is what the second check catches. The remaining checks, from tokens to webhooks, are in the complete API checklist.
04 / What we find
Weak points that recur in Chennai integrations
Long-lived interfaces carry the weaknesses of the year they were built.
Show details for Weak points that recur in Chennai integrations
- One credential for every partner. A shared key or login used by several dealers, so that nobody can tell who made a call or take one away.
- Messages accepted without a signature. Order or payment callbacks that the server trusts because they arrive from the expected address.
- Full records for partial needs. A response with price lists, margins and contact details where the partner needed only a status.
- No ceiling on speed. An interface that answers ten thousand lookups a minute, which makes harvesting a catalog or a customer list cheap.
- Old versions beside new ones. A first release left running for one client, without the checks added later.
- Test endpoints with live data. A staging gateway reachable from the internet and connected to production records.
The report ranks fixes by how many partners each change protects, so the first change you make is the one that matters most, and you can show a partner, in the retest section of the report, which gaps are already closed and which are still open. That record is what a large customer's supplier review usually asks to see.
Many of these weaknesses go unnoticed because the integration works. Orders flow, invoices are paid and nobody opens the interface again until a partner complains or a customer's auditor asks. A test is often the first time anyone reads the traffic closely, which is why the findings can feel surprising even when each one is easy to fix.
05 / Rules and customers
What drives API testing for Chennai companies
Partners, auditors and regulators ask different questions of the same interface.
Show details for What drives API testing for Chennai companies
Large customers ask suppliers how their integrations are secured before they connect them. Auditors for ISO 27001 look for testing of systems that exchange data. Where card data crosses an API, PCI DSS is relevant, while banks and their partners follow their regulator's own directions, so read those first.
A report mapped to the OWASP API Security Top 10, still the 2023 edition in November 2026, is the one most partners recognize; our walk-through of that list explains each item, and the article on broken object-level authorization covers the most common flaw.
06 / How it runs
How an API test fits a Chennai integration estate
The inventory comes first because older estates always hold surprises.
Show details for How an API test fits a Chennai integration estate
Before day 1
Inventory by call
On a call with your developers and the vendors who built each interface, we list hosts, versions, gateways and file exchanges, and mark the ones that should be retired.
Day 1
Credentials and test partners
You supply credentials for each role and a test credential for each partner type, with documentation where it exists. We confirm access and share our fixed addresses.
Days 2 to 7
Every interface under test
We test object and function authorization, tokens, data exposure, limits and callbacks, replaying calls across credentials, and report any serious finding at once.
OutputRequests that reproduce each finding
07 / Questions to ask
Checks to run on an API tester's proposal
Long-lived estates need a tester who is comfortable with old interfaces as well as new ones.
Show details for Checks to run on an API tester's proposal
- Can you test EDI, file-based and message-gateway exchanges, or only web APIs?
- How will you test partner credentials without touching the partner's own systems?
- Will you compare what each response returns with what the receiver actually needs?
- How do you handle an interface that a vendor built and still maintains?
- Will the report show which fix protects the most partners?
08 / Delivery
Delivery of API tests for Chennai companies
Where the work happens
Testing is run from our office in Yellareddyguda, Hyderabad, which is our only office. Outside Hyderabad nothing about these tests needs us in your building; if a customer or a site rule asks for someone present, we come by arrangement and write the travel cost into the proposal.
What you receive
One report is written for management, customers and auditors, and a second, more technical one for the engineers who make the fixes. A walkthrough call covers both, and after your fixes we retest and mark each finding closed or open. Every inquiry gets a reply: we respond within 24 hours.
How to prepare
Test accounts, a staging address, our testing addresses allowed through your firewall and a named contact are what we ask for. The preparation article explains each item, and the one-page checklist (PDF) is a printable version.
09 / Price
What an API test costs in Chennai
Interfaces, roles and environments scope an API test, which begins from INR 27,000 + 18% GST. A single mobile backend prices differently from a partner platform with several gateways, and the proposal states the figure in writing. See the API testing cost guide.
The starting price for small scopes includes one free retest. For larger scopes, the retest terms are written into the proposal before work starts.
10 / FAQ
Frequently asked questions
Short answers about scope, price and how testing works. For anything else, call +91 86868 92922.
Can you test older EDI or file-based integrations?
Yes. We test authentication, message tampering and the receiver's handling of malformed or hostile documents, alongside any web-style API. See the section on Interfaces that dominate our Chennai API work above.
Can you find APIs we have forgotten about?
Often. We look at apps, front-end code, public records, old documents and gateway settings, and we ask the people who built them. Anything found is added to the scope with your agreement. See the section on From our guide: inventory and data exposure above.
Do you test partner credentials separately?
Yes. We test what each type of partner credential can read or change, and whether one partner can reach another's data, using test credentials you provide. See the section on Interfaces that dominate our Chennai API work above.
Can you test while the vendor who built the API is still involved?
Yes, with written agreement from both sides. The vendor provides access and fixes, and we report to you. See the section on Checks to run on an API tester's proposal above.
Are your engineers based in Chennai?
No, they work from Hyderabad. A visit to Chennai is arranged only if it helps. See the section on Delivery of API tests for Chennai companies above.
What does it cost?
Expect a start from INR 27,000 + 18% GST, climbing with interfaces, roles and environments. See the section on What an API test costs in Chennai above.
Plan your next security test
Tell us what needs testing and when you need it done, and we will propose a scope and timeline. We respond within 24 hours. If you would rather talk first, call or write to us.
- +91 86868 92922
- contact@berry9.com
- H.No: 8-3-945/A/12 & 13, Sri Venkata Sai Nest Apartments, Nagarjuna Nagar Colony, Yellareddyguda, Hyderabad 500073, Telangana