This is the eighth post in my series on Germany’s federal API authorization blueprint, and it is the one I have been building toward: what would it actually take for US federal and state agencies to emulate this? The good news, and I want to lead with it, is that the US already owns nearly every ingredient. What we lack is not the standards or the tooling — it is the composed, published profile and the governance discipline to hold it. Germany did the hard part in public. Our job is mostly assembly and translation.
Start with why this transfers structurally. Germany is sixteen states plus a federal government coordinating shared services across independent operators. That is not far from US federal agencies, bureaus, and states, with the same tension between a central framework and local ownership. Their central answer — coarse-grained rules governed centrally, fine-grained decisions owned by the domains, and the choice of where to centralize left to the domain — maps cleanly onto our separation between an OMB or GSA-level framework and agency-level program ownership. And they did not choose a single standard a US security board would argue with: OAuth 2.1, OpenID Connect, DPoP, dynamic client registration, the NIST SP 800-162 attribute-based access model, and Zero Trust straight out of NIST SP 800-207 and OMB M-22-09. Every one of those is already American canon.
So here is the part to copy essentially unchanged, because it is jurisdiction-neutral. Profile OAuth 2.1 plus FAPI 2.0 rather than inventing a scheme, and lean on FAPI’s certification and conformance suite. Use DPoP for edge sender-constraining and reserve mutual TLS for the small internal control plane. Use private_key_jwt for client authentication at the edge, where transport-independence saves you from exactly the TIC-and-gateway-termination pain you already live with. Use dynamic client registration with signed software statements as your automated-onboarding trust anchor. Adopt the PEP/PDP/PAP/PIP roles with OpenID AuthZEN as the decision interface. Define two protection tiers driven by explicit attacker models. And keep a transparency log for tamper-evident permission changes, free of personal data at the center. None of that needs to change at the border.
What does need a US-specific answer is a short, clean list of swap-ins, and this is where the German architecture’s discipline pays off, because it isolated the jurisdiction-specific pieces so cleanly that you can lift them out and drop US equivalents in. Their citizen identity anchor, BundID, becomes login.gov — plus agency identity providers and PIV/CAC through the federal ICAM framework. Their business identity anchor, MeinUnternehmenskonto, becomes SAM.gov and the Unique Entity ID as the organization anchor. Their eIDAS cross-border trust becomes state-to-federal trust through the FICAM trust framework. Their V-PKI and connection-network constraints become Federal PKI, PIV, and TIC 3.0 — the very constraints that argue for DPoP and private_key_jwt in the first place. Their alignment to BSI baseline security becomes alignment to the NIST Risk Management Framework and SP 800-53, with FedRAMP for any operated components. Their protection tiers, keyed to German protection-need categories, key instead to FIPS 199 impact levels. Their IT Planning Council governance becomes some combination of OMB and GSA for policy, NIST for standards, and a cross-agency steward — a CIO Council or a TTS-style body — to actually own the profile. Same architecture, American nouns.
Where does it physically live and run? api.gov is the natural home for a published “US Government API Authorization Profile” and a catalog, linked to OpenAPI, of which APIs assert which tier — and this is exactly where the governance-as-code work I have been doing plugs straight in. The profile’s MUST and SHOULD requirements become a Spectral ruleset that any agency can run against its OpenAPI in CI, per tier, so conformance is checkable on every commit instead of once a year in a review. login.gov already gives you OIDC; the missing layer is the machine-to-machine client-credentials-plus-DPoP-plus-registration profile on top of it. Open Policy Agent is already the de facto policy engine across a lot of government, and Germany’s polling-based decision-point synchronization is literally how OPA bundles work — so their PDP pattern runs on tooling you may already operate, with AuthZEN giving it a standard front door. And FedRAMP is the vehicle to make a central registration, decision, and transparency-log service consumable by agencies.
So here is the concrete starting sequence I would run. One: publish a US Government API Authorization Profile version 0.1 — OAuth 2.1 plus FAPI 2.0 plus DPoP plus private_key_jwt plus dynamic registration with software statements, two tiers keyed to Moderate and High impact. One document. That is the German security profile, Americanized. Two: encode it as a Spectral ruleset so conformance is executable from day one. Three: stand up a reference decision point on OPA with an AuthZEN interface and bundle-based sync, and publish enforcement patterns for the API gateway and the backend. Four: wire the identity anchors — login.gov for people, SAM.gov and the UEI for organizations. Five: run a two-service pilot, exactly as Germany is piloting its core components — pick two agency base APIs, onboard a third-party consumer end to end with automated registration, and prove the revocation and transparency story. Six: write the ADRs as you go, and consult in the open.
The hardest part will not be technical, and Germany’s example is the tell. It will be the method from my last post — writing the decisions down with their rejected alternatives, deriving requirements from named adversaries, consulting in public, and treating “make it binding” as a funded, phased program rather than a memo. But the technology risk here is genuinely low, because almost none of it is novel to us. The single most valuable first artifact the US could ship is the one thing it currently lacks and Germany now has: a published, testable API authorization profile. Everything else is assembly. Next, and last in the series, I widen the lens back out to Europe, where eIDAS and a shared GovTech ecosystem make this a continental opportunity rather than a national one.
