---
title: "List bounded pseudonymous participant projections for an owned Research Study."
method: GET
path: "/api/v1/research-studies/{studyId}/participants"
tags: ["Research Studies"]
---

# List bounded pseudonymous participant projections for an owned Research Study.

`GET /api/v1/research-studies/{studyId}/participants`

## Request

- Base URL: `https://commentary.dev`
- URL: `https://commentary.dev/api/v1/research-studies/{studyId}/participants`
- Auth: HTTP bearer

Returns participant keys, bounded cohorts and states, safe session references, source hashes, and sync/access status. It excludes contact references, identity-system fields, consent receipt references, participant tokens, and provider identity.

## Path parameters

- `studyId` string, required

## Query parameters

- `limit` integer
- `cursor` string

## Headers

- `X-Commentary-Workspace-Id` string
- `X-Correlation-Id` string

## Response `200`

Successful response.

- object
  - `ok` unknown
  - `studyId` string
  - `participants` object[]
  - `nextCursor` string, nullable

## Other responses

- `400`: The request was invalid.
- `401`: Authentication is required.
- `403`: The token or session does not have permission for this resource.
- `404`: The resource was not found.
- `429`: The request was rate limited.

---

[API](https://skmtc.dev/commentary/apis/commentary-public-api.md) · [All operations](https://skmtc.dev/commentary/apis/commentary-public-api/llms.txt) · [OpenAPI document](https://skmtc.dev/commentary/apis/commentary-public-api/revisions/7aaafc198c52?raw)