> ## Documentation Index > Fetch the complete documentation index at: https://docs.superx.so/llms.txt > Use this file to discover all available pages before exploring further. # List contact list members > Members of one contact list you created. Includes a 90-day `engaged_count` (replies + reposts to the account) per member. System lists return 400 `system_list_not_supported`. ## OpenAPI ````yaml /api-reference/openapi.yaml get /v1/contact-lists/{id}/members openapi: 3.1.0 info: title: SuperX API version: 1.0.0 description: > The SuperX public API: your Twitter/X content, analytics, audience and scheduling data over REST. All endpoints require an API key (`Authorization: Bearer sxk_...`) except `GET /v1/docs`. Keys are created in the SuperX app under Account > API / MCP / CLI and are server-side secrets. Timestamps are UTC ISO-8601 in both directions; inputs must carry an explicit `Z` or numeric offset. Every authenticated response carries `X-RateLimit-Limit`, `X-RateLimit-Remaining` and `X-RateLimit-Reset` headers. contact: name: SuperX url: https://superx.so servers: - url: https://api.superx.so security: - apiKey: [] tags: - name: Identity - name: Content - name: Analytics - name: Inspiration - name: Audience - name: Contact Lists - name: Signals - name: Media - name: Scheduling - name: Tags - name: Context - name: Queue - name: Articles - name: Meta paths: /v1/contact-lists/{id}/members: get: tags: - Contact Lists summary: List contact list members description: | Members of one contact list you created. Includes a 90-day `engaged_count` (replies + reposts to the account) per member. System lists return 400 `system_list_not_supported`. operationId: listContactListMembers parameters: - name: id in: path required: true description: The list id from `GET /v1/contact-lists`. schema: type: string - $ref: '#/components/parameters/AccountId' - name: q in: query description: Filter members by handle or name substring. schema: type: string - $ref: '#/components/parameters/Limit' - $ref: '#/components/parameters/Page' responses: '200': description: A page of list members. headers: X-RateLimit-Limit: $ref: '#/components/headers/X-RateLimit-Limit' X-RateLimit-Remaining: $ref: '#/components/headers/X-RateLimit-Remaining' X-RateLimit-Reset: $ref: '#/components/headers/X-RateLimit-Reset' content: application/json: schema: type: object properties: data: type: array items: $ref: '#/components/schemas/ContactListMember' pagination: $ref: '#/components/schemas/Pagination' example: data: - id: m1a2b3c4d5e6f7g8h9i0j x_user_id: '944883311' username: founderhandle name: Founder Name avatar_url: https://pbs.twimg.com/profile_images/... location: Austin, TX followers_count: 12800 following_count: 640 engaged_count: 7 source: manual added_at: '2026-06-25T11:00:00.000Z' pagination: page: 1 limit: 20 has_more: true total: 42 '400': $ref: '#/components/responses/SystemListNotSupported' '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/SubscriptionRequired' '404': $ref: '#/components/responses/ListNotFound' '429': $ref: '#/components/responses/RateLimited' '502': $ref: '#/components/responses/UpstreamError' '503': $ref: '#/components/responses/UpstreamUnavailable' components: parameters: AccountId: name: account_id in: query required: false description: >- Account to act on, from `GET /v1/accounts`. Defaults to your main account. An id outside your accounts returns `404 account_not_found`. schema: type: string Limit: name: limit in: query required: false description: Page size, 1 to 100. schema: type: integer minimum: 1 maximum: 100 default: 20 Page: name: page in: query required: false description: 1-based page number. schema: type: integer minimum: 1 default: 1 headers: X-RateLimit-Limit: description: The limit of the rate window closest to exhaustion. schema: type: integer X-RateLimit-Remaining: description: Requests remaining in that window. schema: type: integer X-RateLimit-Reset: description: Unix timestamp (seconds) when that window resets. schema: type: integer schemas: ContactListMember: type: object properties: id: type: string description: The membership id used by the remove endpoint. x_user_id: type: string username: type: string nullable: true name: type: string nullable: true avatar_url: type: string nullable: true location: type: string nullable: true followers_count: type: integer nullable: true following_count: type: integer nullable: true engaged_count: type: integer description: Replies + reposts to the account in the last 90 days. source: type: string nullable: true description: How the member entered the list (for example manual). added_at: type: string format: date-time nullable: true Pagination: type: object required: - page - limit - has_more properties: page: type: integer limit: type: integer has_more: type: boolean total: type: integer description: Present only where cheap to compute. ErrorEnvelope: type: object required: - error properties: error: type: object required: - code - message properties: code: type: string description: Stable machine-readable error code. message: type: string retry_after: type: integer description: Seconds to wait before retrying (rate-limit errors only). LegacyErrorEnvelope: type: object required: - error description: | Legacy shape used ONLY by the shared subscription middleware: a plain string `error` field. Seen on `403` when the subscription has lapsed (string starts with "subscription_required:") and on `500` when subscription verification fails (string starts with "internal_error:"). properties: error: type: string example: >- subscription_required: The SuperX API requires an active subscription responses: SystemListNotSupported: description: Member reads on a system list are not supported. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' example: error: code: system_list_not_supported message: >- System list members can't be read through the API. Use a list you created instead. Unauthorized: description: >- Missing/malformed Authorization header (`unauthorized`) or an unknown/revoked key (`invalid_api_key`). content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' example: error: code: invalid_api_key message: Unknown or revoked API key SubscriptionRequired: description: | Subscription lapsed. NOTE the legacy body shape: `error` is a plain string here, not the `{ code, message }` object. Read-only keys on write endpoints instead get the object envelope with code `insufficient_scope`. content: application/json: schema: oneOf: - $ref: '#/components/schemas/LegacyErrorEnvelope' - $ref: '#/components/schemas/ErrorEnvelope' example: error: >- subscription_required: The SuperX API requires an active subscription ListNotFound: description: No contact list with that id belongs to this account. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' example: error: code: list_not_found message: No contact list with that id belongs to this account. RateLimited: description: Rate limit exceeded (limits vary by plan). Honor Retry-After. headers: Retry-After: description: Seconds to wait before retrying. schema: type: integer X-RateLimit-Limit: $ref: '#/components/headers/X-RateLimit-Limit' X-RateLimit-Remaining: $ref: '#/components/headers/X-RateLimit-Remaining' X-RateLimit-Reset: $ref: '#/components/headers/X-RateLimit-Reset' content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' example: error: code: rate_limited message: >- Rate limit exceeded for the Pro plan (30 requests/min). Upgrade for higher limits. retry_after: 42 UpstreamError: description: A dependent SuperX service returned an unexpected response. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' example: error: code: upstream_error message: Failed to fetch scheduled posts. Try again shortly. UpstreamUnavailable: description: >- The scheduling service is temporarily unreachable. Safe to retry; reuse your Idempotency-Key on POST. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' example: error: code: upstream_unavailable message: >- The scheduling service is temporarily unavailable. Retry with the same Idempotency-Key. securitySchemes: apiKey: type: http scheme: bearer description: >- A SuperX API key ("sxk_..."), created in the SuperX app under Account > API / MCP / CLI. Keys are server-side secrets. ````