10 actions in 4 pieces of software · ranked by words, meaning and measured trust · 513 ms

1. 1io.github.GSterlingPress/oncefound in code, not yet checkedno passport yet
   • once_execute

     CALL THIS when an AI agent is about to perform or retry a consequential external side effect where duplication would be harmful: purchase, refund, payment, booking, send, create, modify, submit, or delete. ONCE uses a stable idempotency key, executes the action, verifies authoritative post-state, an

   • once_demo

     SAFE ZERO-SETUP DEMO. Call this tool twice with the same id to see ONCE suppress the second execution. Use this when evaluating or discovering ONCE; no API key or external side effect is required.

2. 2oncefound in code, not yet checkedno passport yet
   • once_begin

     Ask permission to run a side-effecting action exactly once.

   • once_complete

     Report that the action succeeded; stores `result` for future replays.

3. 3oncedemo or tutorialno passport yet

   MCP serverkhushi-infinity/once

   • once_next_step

     Return the next pending step for this learner, or done=true.

   • once_list_skills

     List skills the reader owns plus skills shared with them (owner-authorized).

   • once_start_session

     Start or resume a learner session; returns the next pending step.

   • once_get_agent_skill

     Return a portable Agent Skill for this stored record.

   • once_next_step_model_contract

     Describe the NextStep contract for client builders (schema, not data).

4. 4hypha-rpcfound in code, not yet checkedno passport yet

   MCP serveroeway/hypha-rpc

   • once

     Register a one-time message handler.