I built Tethyr Cloud for the AWS AIdeas competition - it's a B2B agent federation platform addressing a problem I see emerging: agent discovery is fragmenting across proprietary registries with vendor lock-in.
The architecture has two parts:
open-tethyr (OSS): Agent discovery server implementing the Agent Exchange (AX) protocol draft by Aaron Sempf. Free, decentralized discovery that prevents corporate gatekeeping.
Tethyr Cloud (commercial): Trust layer for B2B commerce - subscriptions, rate limiting, usage metering. Built on the discovery network but doesn't own the data.
Key design decisions:
Peer-to-peer agent execution - payloads never touch Tethyr infrastructure
Stateless JWT validation with <200ms p95 latency
Fire-and-forget usage reporting off the hot path (SQS buffering)
Dual-API boundary (AppSync for dashboard, API Gateway REST for SDK)
The portal is the B2B component for agent monetisation platform I am building. We are also building free and open source agent discovery - boring federated infra servicekind of like DNS - to ensure Agent discovery is free from lock-in and available for everyone - this is the no Vendor Lock-in component. AWS was a choice and its for a hackathon run by AWS so - needed to.
No Vendor Lock-in is the discovery piece Tethyr.cloud is built on. Thats the killer bit that matters - so we all collectively own agent discovery.
Peer-to-peer agent execution - payloads never touch Tethyr infrastructure Stateless JWT validation with <200ms p95 latency Fire-and-forget usage reporting off the hot path (SQS buffering) Dual-API boundary (AppSync for dashboard, API Gateway REST for SDK)
Built on AWS Amplify Gen 2 in 4 weeks. Running costs: $0/month in Free Tier. Full writeup: https://builder.aws.com/content/3Au66gquBesFWDxq83Luj1SzZOk/...
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