Letta
./RememberStateful agent runtime where memory is the agent — self-editing core memory, archival recall, and a REST API
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
billingsubscription
#agent-memory#stateful-agents#memgpt#runtime
https://www.letta.com
// last verified 8/26/2026
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