> ## 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.
# Stream task
> Exactly as `GET /api/tasks/{id}`: workspace membership and Area access. A workspace API key streams Tasks of its own workspace only. A Run token of an [isolated Task](/concepts/tasks-api#isolated-tasks) streams only that Task, and a Run token of another Task never sees an isolated one.
Request: Path: Task UUID or identifier. Headers: `Last-Event-ID` (optional) resumes after that event. Query: `cursor` resumes like `Last-Event-ID` for clients that cannot set the header (the header wins); `from=start` replays the Task's history on a stream opened without a cursor (default `from=now`). A personal access token or browser session selects the workspace as on every route; a browser `EventSource`, which cannot set headers, uses `?workspace_id=` or `?workspace_slug=` with its session cookie.
Response: `200` with `Content-Type: text/event-stream`, `Cache-Control: no-cache, no-transform` and `X-Accel-Buffering: no`, then events until the server closes the stream.
Status: 200; 400 invalid cursor, a cursor issued for another Task, or an unknown `from`; 429 too many open streams or requests (honor `Retry-After`); 503 live updates unavailable. Authentication and resource-access errors follow [Overview](/api-reference/errors), with the same statuses `GET /api/tasks/{id}` returns.
## OpenAPI
````yaml /api-reference/openapi.json get /api/tasks/{id}/stream
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}/stream:
get:
tags:
- Tasks
summary: Stream task
description: >-
Exactly as `GET /api/tasks/{id}`: workspace membership and Area access.
A workspace API key streams Tasks of its own workspace only. A Run token
of an [isolated Task](/concepts/tasks-api#isolated-tasks) streams only
that Task, and a Run token of another Task never sees an isolated one.
Request: Path: Task UUID or identifier. Headers: `Last-Event-ID`
(optional) resumes after that event. Query: `cursor` resumes like
`Last-Event-ID` for clients that cannot set the header (the header
wins); `from=start` replays the Task's history on a stream opened
without a cursor (default `from=now`). A personal access token or
browser session selects the workspace as on every route; a browser
`EventSource`, which cannot set headers, uses `?workspace_id=` or
`?workspace_slug=` with its session cookie.
Response: `200` with `Content-Type: text/event-stream`, `Cache-Control:
no-cache, no-transform` and `X-Accel-Buffering: no`, then events until
the server closes the stream.
Status: 200; 400 invalid cursor, a cursor issued for another Task, or an
unknown `from`; 429 too many open streams or requests (honor
`Retry-After`); 503 live updates unavailable. Authentication and
resource-access errors follow [Overview](/api-reference/errors), with
the same statuses `GET /api/tasks/{id}` returns.
operationId: streamTask
parameters:
- name: id
in: path
required: true
description: id from the corresponding authorized response.
schema:
type: string
- name: cursor
in: query
description: Optional cursor filter or control; see the operation contract.
schema:
type: string
- name: from
in: query
description: Optional from filter or control; see the operation contract.
schema:
type: string
enum:
- now
- start
default: now
- name: Last-Event-ID
in: header
schema:
type: string
description: >-
Resume cursor from the previous SSE event; takes precedence over
cursor.
- 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: Server-sent task events; see Task stream for the event contract.
content:
text/event-stream:
schema:
type: string
'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'
'503':
description: Request failed; see the operation contract for the condition.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
security:
- bearerAuth: []
components:
schemas:
Error:
type: object
properties:
error:
type: string
code:
type: string
required:
- error
additionalProperties: true
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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