Invite your own participants

---
name: invite-your-own-participants
description: Use when the user wants to add, invite, update, or reward their own participants in a BYOP study.
---

When the user supplies participants:

Apply the shared [approval and workflow continuity policy](../../references/approval-continuity.md).

1. Call `get_study` and verify `recruiting_method` is `byop` and `provisioning_status` is `provisioned`.
2. Compare the study with any trusted checkpoint. If it matches an already approved plan, carry that approval forward. Otherwise return the complete current persisted study plan with its audience, screeners, concepts, and interview settings, obtain explicit approval of that exact version, and retain a new checkpoint. Approval to create or customize the study does not count.
3. Normalize and deduplicate email addresses case-insensitively. `create_participants` accepts 1–100 participants per request.
4. Explain that invitations send by default. Use `silent: true` for each participant when the user wants records created without sending email.
5. Call `create_participants` with `study_id` and the batch only after provisioning and exact-version plan approval are confirmed.
6. Use `list_participants` to verify the batch. Call `get_participant` before `update_participant`.
7. `send_participant_reward` has a financial side effect and is BYOP-only. Confirm the exact participant and require an explicit request before sending. The backend prevents a duplicate reward for an already-paid participant.
8. Participant deletion is not available through the public MCP surface. Do not promise to delete a participant.