> ## Documentation Index
> Fetch the complete documentation index at: https://docs.melso.ai/llms.txt
> Use this file to discover all available pages before exploring further.
> ## Agent Instructions
> Melso product MCP: https://melso.ai/api/mcp (OAuth; one company per grant). REST: https://melso.ai. Documentation-search MCP: https://docs.melso.ai/mcp. The docs search server does not act on customer accounts.
>
> Use the live tool schema and respect company membership. Ask the person to authorize the exact fiscal document version in the signed-in app. A professional prepares and files included returns after authorization; AI does not file alone. A prepared file or approval receipt is not evidence of filing. Never claim completion from an accepted Task or Run. Keep credentials out of chat and logs. Agents features are internal or by private invitation.
# List task message page
> Workspace member with access to this resource.
Request: Path: Task UUID. Query: `limit?:integer`, `before_created_at?:RFC3339Nano`, `before_id?:UUID` (cursor pair).
Response: TaskMessagesPageResponse; default limit 50, valid range 1–100, chronological order within each page. The first page, without a cursor, holds the newest messages. For older ones, pass `next_cursor.created_at` and `next_cursor.id` as `before_created_at` and `before_id` while `has_more` is true. Queued follow-ups that are not yet next in line are omitted.
Status: 200; 400 invalid limit or cursor. Authentication and resource-access errors follow [Overview](/api-reference/errors).
## OpenAPI
````yaml /api-reference/openapi.json get /api/tasks/{id}/messages/page
openapi: 3.1.0
info:
title: Melso API
version: '2026-10-12'
description: >-
Customer integration contracts for Melso. Agents access is internal or by
private invitation. Fiscal approval remains in the authenticated app.
contact:
name: Melso
url: https://melso.ai/en
servers:
- url: https://melso.ai
description: Production API origin
security: []
tags:
- name: Areas
description: >-
Melso Agents is available only internally or by private invitation.
Agents-specific features require existing access. For the autónomo fiscal
service, see [Get started](/essentials/quickstart).
Areas operations available within the caller's documented permissions.
- name: Artifacts
description: >-
Melso Agents is available only internally or by private invitation.
Agents-specific features require existing access. For the autónomo fiscal
service, see [Get started](/essentials/quickstart).
Artifacts operations available within the caller's documented permissions.
- name: Authentication
description: >-
Melso Agents is available only internally or by private invitation.
Agents-specific features require existing access. For the autónomo fiscal
service, see [Get started](/essentials/quickstart).
Authentication operations available within the caller's documented
permissions.
- name: Automations
description: >-
Melso Agents is available only internally or by private invitation.
Agents-specific features require existing access. For the autónomo fiscal
service, see [Get started](/essentials/quickstart).
Automations operations available within the caller's documented
permissions.
- name: Companies
description: >-
Melso Agents is available only internally or by private invitation.
Agents-specific features require existing access. For the autónomo fiscal
service, see [Get started](/essentials/quickstart).
Companies operations available within the caller's documented permissions.
- name: Execution funding
description: >-
Melso Agents is available only internally or by private invitation.
Agents-specific features require existing access. For the autónomo fiscal
service, see [Get started](/essentials/quickstart).
Execution funding operations available within the caller's documented
permissions.
- name: Files
description: >-
Melso Agents is available only internally or by private invitation.
Agents-specific features require existing access. For the autónomo fiscal
service, see [Get started](/essentials/quickstart).
Files operations available within the caller's documented permissions.
- name: GitHub
description: >-
Melso Agents is available only internally or by private invitation.
Agents-specific features require existing access. For the autónomo fiscal
service, see [Get started](/essentials/quickstart).
GitHub operations available within the caller's documented permissions.
- name: Interactions
description: >-
Melso Agents is available only internally or by private invitation.
Agents-specific features require existing access. For the autónomo fiscal
service, see [Get started](/essentials/quickstart).
Interactions operations available within the caller's documented
permissions.
- name: Knowledge
description: >-
Melso Agents is available only internally or by private invitation.
Agents-specific features require existing access. For the autónomo fiscal
service, see [Get started](/essentials/quickstart).
Knowledge operations available within the caller's documented permissions.
- name: MCP
description: MCP operations available within the caller's documented permissions.
- name: Messages
description: >-
Melso Agents is available only internally or by private invitation.
Agents-specific features require existing access. For the autónomo fiscal
service, see [Get started](/essentials/quickstart).
Messages operations available within the caller's documented permissions.
- name: OAuth
description: OAuth operations available within the caller's documented permissions.
- name: Private network
description: >-
Melso Agents is available only internally or by private invitation.
Agents-specific features require existing access. For the autónomo fiscal
service, see [Get started](/essentials/quickstart).
Private network operations available within the caller's documented
permissions.
- name: Runs
description: >-
Melso Agents is available only internally or by private invitation.
Agents-specific features require existing access. For the autónomo fiscal
service, see [Get started](/essentials/quickstart).
Runs operations available within the caller's documented permissions.
- name: Skills
description: >-
Melso Agents is available only internally or by private invitation.
Agents-specific features require existing access. For the autónomo fiscal
service, see [Get started](/essentials/quickstart).
Skills operations available within the caller's documented permissions.
- name: Tasks
description: >-
Melso Agents is available only internally or by private invitation.
Agents-specific features require existing access. For the autónomo fiscal
service, see [Get started](/essentials/quickstart).
Tasks operations available within the caller's documented permissions.
- name: Vault
description: >-
Melso Agents is available only internally or by private invitation.
Agents-specific features require existing access. For the autónomo fiscal
service, see [Get started](/essentials/quickstart).
Vault operations available within the caller's documented permissions.
- name: Webhooks
description: >-
Melso Agents is available only internally or by private invitation.
Agents-specific features require existing access. For the autónomo fiscal
service, see [Get started](/essentials/quickstart).
Webhooks operations available within the caller's documented permissions.
paths:
/api/tasks/{id}/messages/page:
get:
tags:
- Messages
summary: List task message page
description: >-
Workspace member with access to this resource.
Request: Path: Task UUID. Query: `limit?:integer`,
`before_created_at?:RFC3339Nano`, `before_id?:UUID` (cursor pair).
Response: TaskMessagesPageResponse; default limit 50, valid range 1–100,
chronological order within each page. The first page, without a cursor,
holds the newest messages. For older ones, pass `next_cursor.created_at`
and `next_cursor.id` as `before_created_at` and `before_id` while
`has_more` is true. Queued follow-ups that are not yet next in line are
omitted.
Status: 200; 400 invalid limit or cursor. Authentication and
resource-access errors follow [Overview](/api-reference/errors).
operationId: listTaskMessagePage
parameters:
- name: id
in: path
required: true
description: id from the corresponding authorized response.
schema:
type: string
- name: limit
in: query
schema:
type: integer
minimum: 1
maximum: 100
default: 50
description: Messages per page.
- name: before_created_at
in: query
schema:
type: string
format: date-time
description: next_cursor.created_at from the previous page. Send with before_id.
- name: before_id
in: query
schema:
type: string
format: uuid
description: next_cursor.id from the previous page. Send with before_created_at.
- name: X-Workspace-ID
in: header
required: false
description: >-
Company UUID for a personal token on company-scoped operations. A
company API key already binds its company.
schema:
type: string
format: uuid
responses:
'200':
description: >-
TaskMessagesPageResponse; default limit 50, valid range 1–100,
chronological order within each page. The first page, without a
cursor, holds the newest messages. For older ones, pass
`next_cursor.created_at` and `next_cursor.id` as `before_created_at`
and `before_id` while `has_more` is true. Queued follow-ups that are
not yet next in line are omitted.
content:
application/json:
schema:
$ref: '#/components/schemas/TaskMessagesPageResponse'
'400':
description: Invalid request.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'401':
description: Authentication required.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'403':
description: Credential, company or resource access denied.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'404':
description: Resource unavailable to this caller.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'429':
description: Rate limited; respect Retry-After when present.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'500':
description: Server error.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
security:
- bearerAuth: []
components:
schemas:
TaskMessagesPageResponse:
type: object
properties:
messages:
type: array
items:
$ref: '#/components/schemas/TaskMessageResponse'
limit:
type: integer
has_more:
type: boolean
next_cursor:
anyOf:
- $ref: '#/components/schemas/TaskMessagesCursorResponse'
- type: 'null'
required:
- messages
- limit
- has_more
Error:
type: object
properties:
error:
type: string
code:
type: string
required:
- error
additionalProperties: true
TaskMessageResponse:
type: object
properties:
id:
type: string
task_id:
type: string
author_type:
type: string
author_id:
type: string
content:
type: string
role:
type: string
kind:
type: string
run_id:
anyOf:
- type: string
- type: 'null'
failure_reason:
anyOf:
- type: string
- type: 'null'
elapsed_ms:
anyOf:
- type: integer
- type: 'null'
created_at:
type: string
updated_at:
type: string
reactions:
type: array
items:
$ref: '#/components/schemas/ReactionResponse'
attachments:
type: array
items:
$ref: '#/components/schemas/AttachmentResponse'
final:
anyOf:
- type: boolean
- type: 'null'
required:
- id
- task_id
- author_type
- author_id
- content
- role
- kind
- created_at
- updated_at
- reactions
- attachments
TaskMessagesCursorResponse:
type: object
properties:
created_at:
type: string
id:
type: string
required:
- created_at
- id
ReactionResponse:
type: object
properties:
id:
type: string
message_id:
type: string
actor_type:
type: string
actor_id:
type: string
emoji:
type: string
created_at:
type: string
required:
- id
- message_id
- actor_type
- actor_id
- emoji
- created_at
AttachmentResponse:
type: object
properties:
id:
type: string
workspace_id:
type: string
task_id:
anyOf:
- type: string
- type: 'null'
message_id:
anyOf:
- type: string
- type: 'null'
run_id:
anyOf:
- type: string
- type: 'null'
uploader_type:
type: string
uploader_id:
type: string
filename:
type: string
url:
type: string
download_url:
type: string
attachment_download_url:
type: string
markdown_url:
type: string
content_type:
type: string
size_bytes:
type: integer
created_at:
type: string
required:
- id
- workspace_id
- task_id
- message_id
- run_id
- uploader_type
- uploader_id
- filename
- url
- download_url
- markdown_url
- content_type
- size_bytes
- created_at
securitySchemes:
bearerAuth:
type: http
scheme: bearer
description: >-
Company API key (mwk_) or personal access token (mel_). A PAT requires
X-Workspace-ID on company-scoped routes. An API key implies its own
company.
````
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