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Offensive Security
API Penetration Testing Services in Pakistan
REST, GraphQL, and gRPC testing for broken auth, BOLA, and data exposure.
What it is
APIs fail differently from the applications in front of them. We test yours against its own specification and against what it actually accepts: object-level authorization on every endpoint, mass assignment, unbounded queries, and the undocumented or deprecated versions still answering in production.
Types of API Security Testing we deliver
REST API testing
Endpoint by endpoint against your own specification and against what the service actually accepts, which is rarely the same thing.
GraphQL API testing
Introspection exposure, query depth and complexity limits, batching abuse, and authorisation applied at the resolver rather than the gateway.
Mobile backend APIs
The service behind an app, tested directly rather than through the client. This is where mobile products are actually attacked, because the app is just one of many possible callers.
Third-party and partner integrations
The endpoints you expose to other companies, where authentication is often weaker because the caller is trusted by reputation.
Microservice and internal APIs
Service-to-service calls that assume the network is safe. Once one service is reachable, that assumption decides how far an intruder gets.
Webhook and callback security
Signature verification, replay protection and SSRF through callback URLs — a small surface that fails badly.
How we do it
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1
Specification and surface discovery
We work from your OpenAPI or GraphQL schema, then hunt for the endpoints and versions it does not mention but that still respond.
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2
Object-level authorization
Every endpoint that takes an identifier gets tested with identifiers belonging to another account — BOLA is the most common serious API bug there is.
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3
Function-level authorization
Administrative and privileged operations called with ordinary user tokens.
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4
Mass assignment and input binding
We add fields the client never sends — role, tenant, balance, verified — and see which ones stick.
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5
Rate, cost and resource limits
Pagination abuse, expensive GraphQL queries, and enumeration through endpoints with no throttle.
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6
Token and session handling
JWT signature and claim validation, expiry, revocation and scope enforcement.
What's included
- REST, GraphQL and gRPC coverage
- BOLA/BFLA testing across every identifier-taking route
- Mass assignment and schema-drift checks
- Undocumented and deprecated version discovery
- OWASP API Top 10 alignment
- Ready-to-run reproduction collection
Who needs it
- Platforms exposing partner or public APIs
- Mobile and SPA backends where the API is the real attack surface
- Teams whose API surface has outgrown its documentation
Deliverables
- Endpoint-by-endpoint authorization matrix
- Postman or curl collection reproducing each finding
- Schema drift report — what is live but undocumented
- Remediation notes per endpoint
What API Security Testing costs
Priced on the number of endpoints and the authorisation model behind them.
The figure depends on scope, so we quote one fixed price in writing before any work begins. These are the things that move it:
- Endpoint count, not route count — A route that accepts five methods is five things to test. Counts from a specification are usually lower than what the API actually answers.
- Whether documentation exists — An OpenAPI or Postman collection removes the discovery phase. Without one, mapping the API is a measurable part of the engagement before any testing happens.
- The authorisation model — Object-level authorisation is the dominant API risk and the only way to test it is to hold two accounts and attempt each other's records, object by object. More object types means more of that work.
- GraphQL versus REST — A GraphQL endpoint hides many operations behind one URL, with its own introspection, depth and batching problems. It is one endpoint on paper and a wide surface in practice.
- Rate limiting and third-party integrations — Testing against live payment or messaging integrations needs sandbox credentials and coordination, which adds scheduling, not just hours.
Export the specification before scoping. It is the single largest cost reduction available on an API engagement and it takes your developers an hour.
Where we deliver API Security Testing
API testing is delivered entirely remotely, so we work with engineering teams across Pakistan and in UK, US and Gulf time zones without anybody travelling. What we need is network access to the environment and credentials — not an address.
Further reading
- E-commerce and payment integration security — forged payment callbacks, client-supplied prices and coupon races, which scanners never find
Compliance relevance
Frequently asked questions
It is a good start and it speeds things up. But part of the value is finding what the spec omits: older versions, internal routes and debug endpoints that are still reachable.
Yes. GraphQL shifts the risk toward query depth and cost abuse, introspection exposure and resolver-level authorization, and we test all three.
At least two at the same privilege level and one at each higher level. Cross-account testing is impossible with a single account, and that is where the severe findings live.
Manual security testing of the API itself rather than the application in front of it. We call your endpoints directly, as any client could, and test authorisation on every object, input handling, rate limiting, and the versions still answering that nobody remembers deploying.
Because the app is only one caller. The interface may hide a button, but the endpoint behind it still answers. Most serious API findings are invisible from the front end: an endpoint that accepts any record ID, a deprecated version with no authorisation, a field the client never sends but the server happily accepts.
It helps and we will use it, but we do not stop there. The specification tells us what the API is supposed to accept; the engagement is largely about what it actually accepts. Undocumented parameters and forgotten endpoints are routinely where the real findings are.
Yes, and we scope it carefully because it is the one part of API testing that can genuinely affect availability. We agree thresholds and a window in advance, and we stop at proof rather than running the test to exhaustion.
It is scoped on the number of endpoints, the number of roles and whether the API is multi-tenant. Our published floor for a single application is USD 399 and a full manual penetration test is USD 1,500. Send the specification or a list of endpoints and we will quote a fixed price.
Yes, as a coverage baseline so nothing structural is missed. Broken object level authorisation is the first item on that list for good reason — it is the single most common serious API finding, and it is found by testing, not by scanning.
New to penetration testing?
Read the guide
Our complete guide covers methodology, standards, what a good report contains, and how often to test.
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