AWS API Gateway and the Self-Serve Onboarding It Refuses to Offer
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AWS API Gateway has no public self-serve application registration or OAuth flow, making it fundamentally incompatible with agentic onboarding patterns. The author compares AWS against a SoundCloud-style ideal where a script can register an app and receive credentials programmatically. Since AWS requires all credentials to originate from within an account owner's trust boundary, the best automatable alternative is minting an API key and attaching it to a usage plan via SigV4-signed requests to the control plane. A working Node.js script (no dependencies, pure stdlib) is provided that implements SigV4 signing manually and calls CreateApiKey and CreateUsagePlanKey. The author argues this is a philosophical limitation, not a technical one, and calls on AWS to provide a scoped, revocable registration endpoint for agents.
