The AI AGENT Act (S.5051) — requiring large online platforms to open an interoperability interface for AI agents a user has expressly authorized
A bill requiring large online platforms to let AI agents expressly authorized by a user — custodial user agents — interact with the platform on that user behalf, through an interoperability interface. The stated aims are promoting competition and reducing consumer switching costs.
Bill overview (primary data)
- Bill numberS. 5051
- TypeSenate Bill
- Congress119th Congress
- Latest actionRead twice and referred to the Committee on Commerce, Science, and Transportation.（2026-07-21）
Key points
- A bill requiring large online platforms to provide an interoperability interface for AI agents a user has expressly authorized.
- The stated aims are promoting competition and reducing consumer switching costs.
- A custodial user agent is defined as acting under authority expressly granted by a user, in a transparent, documented, scope-limited and revocable manner.
- The provider definition expressly includes a user who operates an agent on their own behalf rather than for others.
- Rather than forbidding or requiring disclosure of AI, it asks that AI be able to act — the reverse of most AI bills.
- A managed user agent must be explicitly authorised, transparent, documented, limited in scope and revocable.
1Not regulating AI but clearing a path for it
Most of the AI-related bills this site holds either forbid something, require disclosure, or require a report. This one runs the other way: it asks that AI be able to act. Where a user employs an agent on their own behalf, the platform is required to open a door to it. Rather than treating AI as an object of regulation, the bill positions it as an instrument of competition policy, and that framing sets its character.
2The conditions of authorization written into the definition
The definitions are specific. A custodial user agent operates under authority expressly granted by a user, in a manner that is transparent, documented, scope-limited and revocable. Nothing qualifies unless it is settled whose behalf it acts on, how far its authority runs, and until when. Where an agent makes a purchase or changes a setting for someone, whose intent produced the act has to be traceable afterwards. The bill fixes those conditions on the definition side, before anything else.
3Running one for yourself is covered too
Distinctive as well is the express statement that the provider definition includes a user who operates an agent on their own behalf rather than for anyone else. Not only services offered by a business but tools an individual assembles fall inside the same framework. The 114 US AI-related bills this site holds as of 2026-08-31 split 65 in the House and 49 in the Senate, with referrals scattered widely.
Among them this is one of the few that treats AI as a question of competition and interoperability. It too stands at committee referral.
4Writing the conditions of delegation into the definition
The definition here is concrete. To be treated as a managed user agent, all of the following must hold.
| Condition in the definition | Content |
|---|---|
| Explicit authorisation | Authority is granted explicitly by the user |
| Transparency | What it is doing is visible |
| Documentation | Its actions remain as a record |
| Limited scope | How far the authority extends is settled |
| Revocability | The authority can be withdrawn at any time |
Unless it is settled on whose behalf, with what authority and for how long it acts, it falls outside. Where an agent makes a purchase or changes a setting for a user, whose intent produced that action has to be traceable afterwards, and the definition fixes those conditions first. That providers include users running an agent for themselves rather than for others is a further distinguishing point.
Why it matters
As agents acting for users spread, platforms face a decision about how far to permit automated access. This bill takes that decision out of provider discretion and casts it as an interoperability obligation. Framing switching costs as a competition question puts it in the same lineage as debates over data portability.
FAQ
What is a custodial user agent?
Why are the conditions of authorization in the definition?
Does it cover an agent someone builds themselves?
Sources (primary)
Source: Congress.gov (Library of Congress; U.S. legislative materials, public domain). Links go to the official site.
- Congress.gov (bill page, original)
- S. 5051（119th Congress）