Trello

Trello API integration with managed OAuth. Manage boards, lists, cards, members, and labels. Use this skill when users want to interact with Trello for project management. For other third party apps, use the api-gateway skill (https://clawhub.ai/byungkyu/api-gateway).

Security Scan

This skill is internally consistent: it proxies Trello API calls through Maton (gateway.maton.ai) and only requires a single MATON_API_KEY environment variable, but you must trust the Maton service because the skill routes Trello access through that third-party gateway.

Purpose & Capability

Name/description (Trello integration with managed OAuth) matches the instructions: all example calls target Maton gateway/ctrl endpoints which proxy to Trello. Required MATON_API_KEY is expected for a managed gateway flow.

Instruction Scope

SKILL.md instructs only to call Maton endpoints and to read MATON_API_KEY from the environment. It does not request unrelated files or credentials. Note: the skill uses non-Trello domains (gateway.maton.ai, ctrl.maton.ai, connect.maton.ai) as part of the managed OAuth flow — this is coherent with the description but means requests go through a third party rather than directly to api.trello.com.

Install Mechanism

Instruction-only skill with no install spec and no code files — minimal install risk (nothing is written to disk by an install step).

Credentials

Only a single env var (MATON_API_KEY) is required, which is proportional to a gateway-based OAuth integration. This key is sensitive: anyone with it can use the Maton gateway to act on linked Trello accounts, so treat it like any API secret.

Persistence & Privilege

The skill does not request always:true or other elevated persistence. It is user-invocable and allows autonomous invocation (platform default) — expected for skills. It does not modify other skills or system settings.

Assessment

This skill appears to do what it says: it proxies Trello operations through Maton. Before installing, verify you trust maton.ai because your MATON_API_KEY grants the gateway access to any Trello connections you create. Suggested steps: (1) Confirm Maton’s privacy/security policies and that you trust the owner; (2) Keep MATON_API_KEY secret and use least-privilege account or scoped key if possible; (3) Review and revoke connections at https://ctrl.maton.ai as needed; (4) Prefer an official Trello integration if you do not want a third-party proxy. The lack of an upstream source/homepage reduces provenance — if provenance matters, ask the publisher for more information.

Access the Trello API with managed OAuth authentication. Manage boards, lists, cards, checklists, labels, and members for project and task management.

Quick Start

# Get boards for current user
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/trello/1/members/me/boards')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Base URL

https://gateway.maton.ai/trello/{native-api-path}

Replace {native-api-path} with the actual Trello API endpoint path. The gateway proxies requests to api.trello.com and automatically injects your OAuth token.

Authentication

All requests require the Maton API key in the Authorization header:

Authorization: Bearer $MATON_API_KEY

Environment Variable: Set your API key as MATON_API_KEY:

export MATON_API_KEY="YOUR_API_KEY"

Getting Your API Key

1. Sign in or create an account at maton.ai
2. Go to maton.ai/settings
3. Copy your API key

Connection Management

Manage your Trello OAuth connections at https://ctrl.maton.ai.

List Connections

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections?app=trello&status=ACTIVE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Create Connection

python <<'EOF'
import urllib.request, os, json
data = json.dumps({'app': 'trello'}).encode()
req = urllib.request.Request('https://ctrl.maton.ai/connections', data=data, method='POST')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Content-Type', 'application/json')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Get Connection

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections/{connection_id}')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

{
  "connection": {
    "connection_id": "21fd90f9-5935-43cd-b6c8-bde9d915ca80",
    "status": "ACTIVE",
    "creation_time": "2025-12-08T07:20:53.488460Z",
    "last_updated_time": "2026-01-31T20:03:32.593153Z",
    "url": "https://connect.maton.ai/?session_token=...",
    "app": "trello",
    "metadata": {}
  }
}

Open the returned url in a browser to complete OAuth authorization.

Delete Connection

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections/{connection_id}', method='DELETE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Specifying Connection

If you have multiple Trello connections, specify which one to use with the Maton-Connection header:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/trello/1/members/me/boards')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Maton-Connection', '21fd90f9-5935-43cd-b6c8-bde9d915ca80')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

If omitted, the gateway uses the default (oldest) active connection.

API Reference

Members

Get Current Member

GET /trello/1/members/me

Get Member's Boards

GET /trello/1/members/me/boards

Query parameters:

• filter - Filter boards: all, open, closed, members, organization, starred
• fields - Comma-separated fields to include

Boards

Get Board

GET /trello/1/boards/{id}

Query parameters:

• fields - Comma-separated fields
• lists - Include lists: all, open, closed, none
• cards - Include cards: all, open, closed, none
• members - Include members: all, none

Example:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/trello/1/boards/BOARD_ID?lists=open&cards=open')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Create Board

POST /trello/1/boards
Content-Type: application/json

{
  "name": "Project Alpha",
  "desc": "Main project board",
  "defaultLists": false,
  "prefs_permissionLevel": "private"
}

Update Board

PUT /trello/1/boards/{id}
Content-Type: application/json

{
  "name": "Project Alpha - Updated",
  "desc": "Updated description"
}

Delete Board

DELETE /trello/1/boards/{id}

Get Board Lists

GET /trello/1/boards/{id}/lists

Query parameters:

• filter - Filter: all, open, closed, none

Get Board Cards

GET /trello/1/boards/{id}/cards

Get Board Members

GET /trello/1/boards/{id}/members

Lists

Get List

GET /trello/1/lists/{id}

Create List

POST /trello/1/lists
Content-Type: application/json

{
  "name": "To Do",
  "idBoard": "BOARD_ID",
  "pos": "top"
}

Update List

PUT /trello/1/lists/{id}
Content-Type: application/json

{
  "name": "In Progress"
}

Archive List

PUT /trello/1/lists/{id}/closed
Content-Type: application/json

{
  "value": true
}

Get Cards in List

GET /trello/1/lists/{id}/cards

Move All Cards in List

POST /trello/1/lists/{id}/moveAllCards
Content-Type: application/json

{
  "idBoard": "BOARD_ID",
  "idList": "TARGET_LIST_ID"
}

Cards

Get Card

GET /trello/1/cards/{id}

Query parameters:

• fields - Comma-separated fields
• members - Include members (true/false)
• checklists - Include checklists: all, none
• attachments - Include attachments (true/false)

Create Card

POST /trello/1/cards
Content-Type: application/json

{
  "name": "Implement feature X",
  "desc": "Description of the task",
  "idList": "LIST_ID",
  "pos": "bottom",
  "due": "2025-03-30T12:00:00.000Z",
  "idMembers": ["MEMBER_ID"],
  "idLabels": ["LABEL_ID"]
}

Update Card

PUT /trello/1/cards/{id}
Content-Type: application/json

{
  "name": "Updated card name",
  "desc": "Updated description",
  "due": "2025-04-15T12:00:00.000Z",
  "dueComplete": false
}

Move Card to List

PUT /trello/1/cards/{id}
Content-Type: application/json

{
  "idList": "NEW_LIST_ID",
  "pos": "top"
}

Delete Card

DELETE /trello/1/cards/{id}

Add Comment to Card

POST /trello/1/cards/{id}/actions/comments
Content-Type: application/json

{
  "text": "This is a comment"
}

Add Member to Card

POST /trello/1/cards/{id}/idMembers
Content-Type: application/json

{
  "value": "MEMBER_ID"
}

Remove Member from Card

DELETE /trello/1/cards/{id}/idMembers/{idMember}

Add Label to Card

POST /trello/1/cards/{id}/idLabels
Content-Type: application/json

{
  "value": "LABEL_ID"
}

Checklists

Get Checklist

GET /trello/1/checklists/{id}

Create Checklist

POST /trello/1/checklists
Content-Type: application/json

{
  "idCard": "CARD_ID",
  "name": "Task Checklist"
}

Create Checklist Item

POST /trello/1/checklists/{id}/checkItems
Content-Type: application/json

{
  "name": "Subtask 1",
  "pos": "bottom",
  "checked": false
}

Update Checklist Item

PUT /trello/1/cards/{cardId}/checkItem/{checkItemId}
Content-Type: application/json

{
  "state": "complete"
}

Delete Checklist

DELETE /trello/1/checklists/{id}

Labels

Get Board Labels

GET /trello/1/boards/{id}/labels

Create Label

POST /trello/1/labels
Content-Type: application/json

{
  "name": "High Priority",
  "color": "red",
  "idBoard": "BOARD_ID"
}

Colors: yellow, purple, blue, red, green, orange, black, sky, pink, lime, null (no color)

Update Label

PUT /trello/1/labels/{id}
Content-Type: application/json

{
  "name": "Critical",
  "color": "red"
}

Delete Label

DELETE /trello/1/labels/{id}

Search

Search All

GET /trello/1/search?query=keyword&modelTypes=cards,boards

Query parameters:

• query - Search query (required)
• modelTypes - Comma-separated: actions, boards, cards, members, organizations
• board_fields - Fields to return for boards
• card_fields - Fields to return for cards
• cards_limit - Max cards to return (1-1000)

Code Examples

JavaScript

const headers = {
  'Authorization': `Bearer ${process.env.MATON_API_KEY}`
};

// Get boards
const boards = await fetch(
  'https://gateway.maton.ai/trello/1/members/me/boards',
  { headers }
).then(r => r.json());

// Create card
await fetch(
  'https://gateway.maton.ai/trello/1/cards',
  {
    method: 'POST',
    headers: { ...headers, 'Content-Type': 'application/json' },
    body: JSON.stringify({
      name: 'New Task',
      idList: 'LIST_ID',
      desc: 'Task description'
    })
  }
);

Python

import os
import requests

headers = {'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}'}

# Get boards
boards = requests.get(
    'https://gateway.maton.ai/trello/1/members/me/boards',
    headers=headers
).json()

# Create card
response = requests.post(
    'https://gateway.maton.ai/trello/1/cards',
    headers=headers,
    json={
        'name': 'New Task',
        'idList': 'LIST_ID',
        'desc': 'Task description'
    }
)

Notes

• IDs are 24-character alphanumeric strings
• Use me to reference the authenticated user
• Dates are in ISO 8601 format
• pos can be top, bottom, or a positive number
• Card positions within lists are floating point numbers
• Use fields parameter to limit returned data and improve performance
• Archived items can be retrieved with filter=closed
• IMPORTANT: When using curl commands, use curl -g when URLs contain brackets (fields[], sort[], records[]) to disable glob parsing
• IMPORTANT: When piping curl output to jq or other commands, environment variables like $MATON_API_KEY may not expand correctly in some shell environments. You may get "Invalid API key" errors when piping.

Error Handling

Status	Meaning
400	Missing Trello connection or invalid request
401	Invalid or missing Maton API key
404	Board, list, or card not found
429	Rate limited (10 req/sec per account)
4xx/5xx	Passthrough error from Trello API

Troubleshooting: API Key Issues

1. Check that the MATON_API_KEY environment variable is set:

echo $MATON_API_KEY

2. Verify the API key is valid by listing connections:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Troubleshooting: Invalid App Name

1. Ensure your URL path starts with trello. For example:

• Correct: https://gateway.maton.ai/trello/1/members/me/boards
• Incorrect: https://gateway.maton.ai/1/members/me/boards

Resources

• Trello API Overview
• Boards
• Lists
• Cards
• Checklists
• Labels
• Members
• Search
• Maton Community
• Maton Support