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OpenAPI Specification
openapi: 3.2.0
info:
title: Matter Account Tags API
version: '1.0'
description: 'The Matter API lets you read, save, and organize content in your Matter library.
Every request requires a [Bearer token](/api/authentication) and an active
Matter Pro subscription.
'
contact:
email: hello@getmatter.com
url: https://getmatter.com
servers:
- url: https://api.getmatter.com/public
description: Production
security:
- bearerAuth: []
tags:
- name: Tags
description: Labels for organizing items.
paths:
/v1/tags:
get:
operationId: listTags
summary: List tags
description: Returns all tags in your library, ordered by most recently used.
tags:
- Tags
parameters:
- $ref: '#/components/parameters/limit'
- $ref: '#/components/parameters/cursor'
responses:
'200':
description: Paginated list of tags.
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:
allOf:
- $ref: '#/components/schemas/PaginatedList'
- type: object
properties:
results:
type: array
items:
$ref: '#/components/schemas/Tag'
'401':
$ref: '#/components/responses/Unauthorized'
'403':
$ref: '#/components/responses/ProRequired'
'429':
$ref: '#/components/responses/RateLimited'
/v1/tags/{id}:
parameters:
- name: id
in: path
required: true
description: The tag ID (e.g. `tag_n5j2x`).
schema:
type: string
pattern: ^tag_[0-9A-Za-z]+$
patch:
operationId: updateTag
summary: Rename tag
description: Rename a tag. The new name applies to all items that have this tag.
tags:
- Tags
requestBody:
required: true
content:
application/json:
schema:
type: object
required:
- name
properties:
name:
type: string
description: The new tag name.
example: long-reads
responses:
'200':
description: Renamed tag.
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:
$ref: '#/components/schemas/Tag'
'401':
$ref: '#/components/responses/Unauthorized'
'403':
$ref: '#/components/responses/ProRequired'
'404':
$ref: '#/components/responses/NotFound'
'409':
description: A tag with this name already exists.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
example:
error:
code: conflict
message: A tag with this name already exists.
field: name
'422':
$ref: '#/components/responses/ValidationError'
'429':
$ref: '#/components/responses/RateLimited'
delete:
operationId: deleteTag
summary: Delete tag
description: Permanently delete a tag and remove it from all items.
tags:
- Tags
responses:
'204':
description: Tag deleted.
'401':
$ref: '#/components/responses/Unauthorized'
'403':
$ref: '#/components/responses/ProRequired'
'404':
$ref: '#/components/responses/NotFound'
'429':
$ref: '#/components/responses/RateLimited'
/v1/items/{item_id}/tags:
parameters:
- name: item_id
in: path
required: true
description: The item ID (e.g. `itm_r9f3a`).
schema:
type: string
pattern: ^itm_[0-9A-Za-z]+$
post:
operationId: addTagToItem
summary: Add tag to item
description: 'Add a tag to an item. Creates the tag if it doesn''t exist.
'
tags:
- Tags
requestBody:
required: true
content:
application/json:
schema:
type: object
required:
- name
properties:
name:
type: string
description: 'The tag name. Case-insensitive. If a tag with this name already exists, it will be reused.
'
example: essays
responses:
'200':
description: Tag returned (already on item).
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:
$ref: '#/components/schemas/Tag'
'401':
$ref: '#/components/responses/Unauthorized'
'403':
$ref: '#/components/responses/ProRequired'
'404':
$ref: '#/components/responses/NotFound'
'422':
$ref: '#/components/responses/ValidationError'
'429':
$ref: '#/components/responses/RateLimited'
/v1/items/{item_id}/tags/{tag_id}:
parameters:
- name: item_id
in: path
required: true
description: The item ID (e.g. `itm_r9f3a`).
schema:
type: string
pattern: ^itm_[0-9A-Za-z]+$
- name: tag_id
in: path
required: true
description: The tag ID (e.g. `tag_n5j2x`).
schema:
type: string
pattern: ^tag_[0-9A-Za-z]+$
delete:
operationId: removeTagFromItem
summary: Remove tag from item
description: 'Remove a tag from an item. The tag itself is not deleted — only the association with this item is removed.
'
tags:
- Tags
responses:
'204':
description: Tag removed from item.
'401':
$ref: '#/components/responses/Unauthorized'
'403':
$ref: '#/components/responses/ProRequired'
'404':
$ref: '#/components/responses/NotFound'
'429':
$ref: '#/components/responses/RateLimited'
components:
responses:
NotFound:
description: Resource not found.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
example:
error:
code: not_found
message: The requested resource was not found.
RateLimited:
description: Rate limit exceeded.
headers:
Retry-After:
description: Seconds to wait before retrying.
schema:
type: integer
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
example:
error:
code: rate_limited
message: Rate limit exceeded. Retry after 12 seconds.
ProRequired:
description: Active Matter Pro subscription required.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
example:
error:
code: pro_required
message: A Matter Pro subscription is required to use the API.
ValidationError:
description: Request validation failed.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
example:
error:
code: validation_error
message: The url field is required.
field: url
Unauthorized:
description: Invalid or missing API token.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
example:
error:
code: authentication_required
message: A valid API token is required.
parameters:
limit:
name: limit
in: query
description: Number of results per page. Min 1, max 100.
schema:
type: integer
default: 25
minimum: 1
maximum: 100
cursor:
name: cursor
in: query
description: Opaque cursor for the next page of results, from a previous `next_cursor`.
schema:
type: string
headers:
X-RateLimit-Reset:
description: Unix timestamp (seconds) when the window resets.
schema:
type: integer
X-RateLimit-Limit:
description: Maximum requests allowed in the current window.
schema:
type: integer
X-RateLimit-Remaining:
description: Requests remaining in the current window.
schema:
type: integer
schemas:
Error:
type: object
required:
- error
properties:
error:
type: object
required:
- code
- message
properties:
code:
type: string
description: Machine-readable error code.
message:
type: string
description: Human-readable error message.
field:
type: string
description: The request field that caused the error, if applicable.
Tag:
type: object
required:
- object
- id
- name
- item_count
- created_at
properties:
object:
type: string
const: tag
id:
type: string
description: Prefixed tag ID (e.g. `tag_n5j2x`).
example: tag_n5j2x
name:
type: string
example: essays
item_count:
type: integer
description: Number of items with this tag.
example: 42
created_at:
type: string
format: date-time
example: '2025-01-15T10:00:00Z'
PaginatedList:
type: object
required:
- object
- results
- has_more
properties:
object:
type: string
const: list
results:
type: array
items: {}
has_more:
type: boolean
description: Whether there are more results after this page.
next_cursor:
type: string
nullable: true
description: Cursor to fetch the next page. `null` when there are no more results.
securitySchemes:
bearerAuth:
type: http
scheme: bearer
description: 'Personal API token with `mat_` prefix. Generate one at https://web.getmatter.com/settings.
'