Hands-on architecture, development guidance, and security review for APIs and third-party integrations. Vyer.Net helps your team design or improve authentication, authorization, data handling, credential management, error controls, and trust boundaries—then reviews the implementation for practical weaknesses before release.
Start-ups, fintech lenders, brokerages, and SaaS teams building a new API integration, modernizing an existing one, or preparing partner-facing services for a security or compliance review.
1–3 weeks
$2,500
Final scope depends on system count, complexity, compliance target, and access readiness. Pricing is presented as a starting estimate, not a guaranteed quote.
This review is for a fintech, lender, brokerage, SaaS, or product team releasing a partner API, connecting a vendor, or modernizing a service that moves sensitive data. It is useful when a security questionnaire arrives late or integration responsibility is divided between teams.
The trigger may be a new enterprise contract, a third-party identity or billing connection, an acquisition, or a release that changes the trust boundary. The review helps teams make the boundary explicit before assumptions become incidents.
The work traces requests, identities, tokens, secrets, data transformations, callbacks, queues, retries, and failure responses across the integration. Authentication is considered separately from authorization so a valid credential does not automatically mean an acceptable action.
Review topics include tenant isolation, input handling, replay and abuse controls, rate limits, error disclosure, logging, credential rotation, webhook verification, dependency ownership, and vendor data retention. Recommendations are proportional to the workflow and its actual exposure.
Implementation guidance can cover API contracts, policy enforcement points, secret storage, authorization tests, and configuration review. The purpose is to give engineers controls they can implement and reviewers evidence they can understand.
This is not an authorization to attack a third party or a substitute for a full code audit. Testing boundaries, supplied artifacts, and access are agreed in advance; the service focuses on the selected integration.
The engagement normally takes one to three weeks depending on API count, integration paths, code and configuration access, and owner availability. A release checkpoint is scheduled so open risks and accepted exceptions are explicit.
You receive a map of the integration and concrete control guidance that can be turned into implementation tasks and tests.
API risk is connected to the systems and delivery habits around it:
Security depends on the complete trust boundary: identity, authorization, data minimization, secret handling, input and error controls, logging, replay and abuse protections, and ownership of the connected system. No single authentication setting answers the whole question.
Code and configuration review can be included where they are relevant to the selected integration. The exact repositories, services, and testing boundary are agreed up front; this is not automatically a full application code audit.
Yes. Webhook identity, signature validation, replay handling, payload minimization, retry behavior, and failure logging are useful review points. Vendor responsibilities and the client’s receiving controls are kept distinct.
The best time is before a new partner integration or major API change is released. It can also be used after a questionnaire, incident, or architecture change reveals uncertainty in an existing boundary.