Arize Phoenix
./MonitorOpenTelemetry-native, open-source tracing and evaluation for LLM and agent applications
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
webhooksNo
free tierYes
billingfree
#observability#opentelemetry#evals#open-source
https://phoenix.arize.com
// last verified 8/26/2026
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