Use a verification API vs building your own SAML integration

Short answer: The parsing is the easy part. Building your own SAML service provider means joining federations, keeping metadata current, rotating certificates and adapting to providers that do not behave like the spec. A hosted API like Studid turns that operational burden into two endpoints.

What "build it yourself" actually includes

If you have never run a SAML service provider, the scope is easy to underestimate. The core work is not reading an XML assertion — it is everything around it:

• Federation membership. You register as a service provider with each federation you want to reach, publish metadata, and comply with its policy. Reaching institutions worldwide means dealing with eduGAIN's aggregate and its member federations.
• Metadata lifecycle. Identity providers add, remove and rename themselves constantly. Someone has to fetch, parse, validate and store that metadata — and keep it fresh — or logins silently break.
• Certificate rotation. Entities rotate signing certificates on their own schedule. Miss a rotation and verification fails.
• Per-IdP behaviour. Support for NameID formats varies. Some providers advertise none, some reject certain requests, and some require particular settings. A request that works for most institutions can fail for a specific one you have never heard of.
• The identifier problem. Deciding what counts as a stable, usable identifier across thousands of providers — and handling the cases where there is not one — is a design problem, not just a parsing problem.
• Ongoing operations. This is not a one-time integration. It is a service you now run, monitor and debug.

None of it is impossible; all of it is a distraction from your actual product.

Build vs buy

	Build your own SP	Studid
Up-front work	Protocol, metadata, federation onboarding	Two REST endpoints
Federation membership	You, per federation	Already registered
Metadata refresh	You maintain the pipeline	Managed
Certificate rotation	You monitor and respond	Managed
Per-IdP quirks	You discover and fix them	Handled
Identifier strategy	You design and maintain it	Normalized to authIdentifier / entityId
Ongoing cost	Engineering time and on-call	Free API
Control	Total	High, via a documented contract

What you trade away

Handing this off is not free of trade-offs. Running your own SP gives you total control over the protocol detail and the exact data you consume. Studid returns a deliberately narrow contract: authIdentifier, entityId and affiliations. If you need a bespoke attribute that no standard provider releases, or you want to be the service provider of record for policy reasons, building it may be the right call.

For most teams, the narrow contract is the point: fewer moving parts, no federation paperwork, and no 3 a.m. metadata incident.

Verify these claims yourself

• The returned contract is documented in the integration guide.
• The supported coverage is on the network page.
• The implementation is open on GitHub.

Methodology: This page reflects Studid's own engineering experience operating a SAML service provider across federated academic identity, as of September 2026.