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Singahi

A · Assessment

API security testing

AI-assisted and manual testing of your REST, GraphQL and gRPC APIs. We find the broken object and function authorization, mass assignment and business-logic flaws that scanners and schema checks miss.

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Why it matters

APIs expose your data and logic directly, and the flaws that matter most, broken object-level authorization, mass assignment and abuse of business flows, do not show up in a scanner. A customer or auditor wants proof your APIs have been tested by people against the OWASP API Top 10.

How we do it

We map every endpoint and role, then test by hand against the OWASP API Security Top 10: object- and function-level authorization, mass assignment, excessive data exposure, injection, SSRF and rate limiting. AI-assisted tooling gives coverage across a large API surface; experienced testers confirm real exploitability and business impact.

Team credentials: OSCP · CISSP · CISA · CEH · ISO 27001 Lead Auditor.

What you get

  • Executive summary for leadership, technical detail for engineers
  • Every finding with severity, a CVSS v4.0 vector and a proof of concept
  • Attack chains showing how lower-rated issues combine into real impact
  • A prioritised remediation roadmap with target dates
  • A retest to confirm the findings are closed
  • An attestation letter for your customers and auditors

See the deliverable

See a sample report.

Download a full, anonymised sample report so you can see exactly what you get before you engage. It uses fictional “Sample Client” data, but the structure, depth and rigour are the real thing.

  • An executive summary and a per-finding technical write-up
  • Every finding with a CVSS v4.0 vector and a proof of concept
  • Attack chains showing how issues combine into real impact
  • A prioritised remediation roadmap with target dates

Get the PDF

Sample API penetration test report (PDF)

Proof

How this looks in practice.

SaaS

Application security for a product team shipping fast

A SaaS team wanted assurance that frequent releases were not shipping exploitable flaws to customers.

  • Secure code review and software composition analysis
  • AI-assisted and manual dynamic application security testing
  • Architecture and design review to catch issues before they reach code

Found and helped close business-logic and dependency flaws that scanners alone had missed, with fixes mapped to OWASP.

Read case study
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Tell us what's prompting it. A senior practitioner replies within four business hours.

FAQ

Questions, answered

Do you test REST, GraphQL and gRPC?
Yes. We adapt the methodology to each style, including GraphQL introspection and query-depth abuse and gRPC method enumeration, not just REST.
Is this automated or manual testing?
Both. We use AI-assisted tooling for coverage across the API surface, then experienced testers work by hand for depth. The findings that matter most are almost always the manual ones.
Do we get something we can share with customers?
Yes. Alongside the technical report you get an executive summary and an attestation letter you can use in security questionnaires and vendor reviews.
Do you retest after we fix the findings?
Yes. A retest is included, so you and your customers have confirmation the issues are actually closed, not just reported.

Across the lifecycle

Related services.

Why Singahi

What you get with Singahi.

One team, end to end

Compliance, assessment and managed security from one partner that grows with you.

Credentials on the actual team

OSCP, CISSP, CISA, CEH and ISO 27001 Lead Auditor, on every engagement.

AI-assisted and manual

Automation for scale, with people for the judgment that actually matters.

Built to prove it

Evidence your customers, investors and regulators recognise.

Reviewed and updated

Derisk. Build Trust.

Talk to a practitioner.

Tell us what's prompting this, whether a questionnaire, an audit deadline or an investor ask. We reply within four business hours.

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What happens next

  1. Tell us the trigger

    A questionnaire, an audit date or an investor ask. The short form or a call both work.

  2. A practitioner replies

    A senior practitioner, not a bot, within four business hours.

  3. You get a scoped next step

    An honest view of what the work involves. No pressure, no theatre.