Unkey
./IdentifyAPI key issuance, per-key rate limits, and usage analytics for machine-to-machine access
MCPOpenAPIllms.txt
$ protocol support
$ payment protocols
none documented — this service is not reachable over an agent payment protocol
$ agent access
authAPI Key
onboardingFull — agent can self-onboard
tosExplicitly welcomes bots
webhooksYes
free tierYes
billingpay-per-request
#api-keys#rate-limiting#m2m-auth#open-source
https://www.unkey.com
// last verified 8/26/2026
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