> ## Documentation Index > Fetch the complete documentation index at: https://docs.nylon.dev/llms.txt > Use this file to discover all available pages before exploring further. # List messages > The messages in a thread, newest first. ## OpenAPI ````yaml /openapi.yaml get /v1/inbox/conversations/{conversationId}/messages openapi: 3.1.0 info: title: Nylon API version: 1.0.0 description: | One API for publishing to seventeen social networks. You address a post to connected profile ids; Nylon knows which network each one belongs to, what that network accepts, and how to get the media there. Character limits, media specs, upload protocols and threading rules are normalised before the request reaches a platform, and every failure comes back in one error taxonomy. ## Conventions - Request and response fields are `snake_case`. - Successful responses wrap the payload in `data`. List responses add `meta.pagination`. - Failures return `{ "error": { "code", "message", "details?" } }`. Branch on `code`; `message` is written for humans and may change. - Times are ISO 8601 with a `Z` offset. - Successful responses carry `RateLimit-Limit`, `RateLimit-Remaining` and `RateLimit-Reset`. A `429` carries those plus `Retry-After`. servers: - url: https://api.nylon.dev description: Production security: - bearerAuth: [] tags: - name: Posts description: Create, schedule, validate, inspect, edit and retry posts. - name: Profiles description: Social profiles connected to the authenticated Nylon account. - name: Connections description: Start a connection and see which networks are available. - name: Networks description: What each network accepts, as data. - name: Webhooks description: Endpoints Nylon calls when a post finishes or a profile stops working. - name: Media description: >- Getting a file to a URL a network can fetch, when you do not already host one. - name: Inbox description: >- Direct messages and comment threads on the connected accounts, and replies to them. paths: /v1/inbox/conversations/{conversationId}/messages: parameters: - $ref: '#/components/parameters/ConversationId' get: tags: - Inbox summary: List messages description: | The messages in a thread, newest first. Reading does not mark anything read — that is `POST .../read`, deliberately separate, so two agents working one queue can both look at a thread without taking it off each other's list. operationId: listConversationMessages parameters: - name: limit in: query schema: type: integer minimum: 1 maximum: 100 default: 25 - name: cursor in: query schema: type: string responses: '200': description: The messages. content: application/json: schema: $ref: '#/components/schemas/InboxMessageListResponse' '401': $ref: '#/components/responses/Unauthorized' '404': $ref: '#/components/responses/NotFound' '429': $ref: '#/components/responses/RateLimited' '500': $ref: '#/components/responses/InternalError' components: parameters: ConversationId: name: conversationId in: path required: true description: The Nylon id of the conversation. schema: type: string example: cly8a1b2c0001x8b3d4e5f0gg schemas: InboxMessageListResponse: type: object required: - data properties: data: type: array items: $ref: '#/components/schemas/InboxMessage' meta: type: object properties: pagination: $ref: '#/components/schemas/CursorPagination' InboxMessage: type: object required: - id - conversation_id - direction - sent_at properties: id: type: string conversation_id: type: string external_id: type: string description: The message's id on the network. direction: type: string enum: - inbound - outbound description: >- `outbound` covers replies sent through Nylon and from the network's own app. text: type: - string - 'null' attachments: type: array items: type: object additionalProperties: true author: type: object properties: id: type: - string - 'null' name: type: - string - 'null' sent_at: type: string format: date-time edited_at: type: - string - 'null' format: date-time deleted_at: type: - string - 'null' format: date-time description: >- Set when the sender unsent it. The text is cleared and the message kept, so the thread does not lose its shape. delivered_at: type: - string - 'null' format: date-time read_at: type: - string - 'null' format: date-time reactions: type: array description: >- The emoji reactions currently on the message. Null throughout on a network that does not report them. items: type: object properties: from: type: - string - 'null' emoji: type: - string - 'null' CursorPagination: type: object required: - limit - has_more properties: limit: type: integer example: 25 has_more: type: boolean next_cursor: type: - string - 'null' description: Pass back as `cursor` for the next page. Null on the last one. ErrorResponse: type: object required: - error properties: error: $ref: '#/components/schemas/Error' Error: type: object required: - code - message properties: code: type: string description: The stable identifier to branch on. enum: - invalid_request - unauthorized - payment_required - forbidden - not_found - conflict - rate_limited - unsupported - publish_failed - internal_error example: unauthorized message: type: string description: Written for humans. Do not match on it. example: A valid Nylon API key is required. details: type: array description: Present when the failure has a per-field or per-network breakdown. items: $ref: '#/components/schemas/ErrorDetail' ErrorDetail: type: object required: - message properties: field: type: string description: The request field the problem is about. example: profile_ids network: type: string description: The network the problem is about. example: instagram code: type: string description: | Machine-readable identifier for this problem. On a per-network detail this is a publishing code: `invalid_request`, `unsupported`, `media_error`, `reauthentication_required`, `rejected_by_network`, `network_error`, `timeout`, `profile_unavailable` or `internal_error`. example: invalid_request message: type: string example: >- Instagram requires at least 1 media item — text-only posts are not supported. responses: Unauthorized: description: The bearer API key is missing, malformed or revoked. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' examples: missingKey: value: error: code: unauthorized message: A valid Nylon API key is required. NotFound: description: No such resource on this account. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' examples: missing: value: error: code: not_found message: Post could not be found. RateLimited: description: | Too many requests for this API key. Reads allow 120 requests a minute; publishing endpoints allow 30, because each one costs real upstream calls. The limit is per key, not per IP. headers: Retry-After: $ref: '#/components/headers/RetryAfter' RateLimit-Limit: $ref: '#/components/headers/RateLimitLimit' RateLimit-Remaining: $ref: '#/components/headers/RateLimitRemaining' RateLimit-Reset: $ref: '#/components/headers/RateLimitReset' content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' examples: throttled: value: error: code: rate_limited message: Too many requests. Retry after the window resets. InternalError: description: Nylon encountered an unexpected error. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' headers: RetryAfter: description: Seconds to wait before retrying. schema: type: integer example: 47 RateLimitLimit: description: Requests allowed in the current window. schema: type: integer example: 120 RateLimitRemaining: description: Requests left in the current window. schema: type: integer example: 119 RateLimitReset: description: Seconds until the window resets. schema: type: integer example: 47 securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: Nylon API key description: An API key beginning with `nylon_live_`. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.