Trello
Connect Trello to create and move cards across boards and lists, and manage comments, members, labels, and checklists.
You paste two values into PopMCP: the API Key generated on a Trello Power-Up you own, and a user Token you grant that Power-Up against your own Trello account.
- Setup time
- 6 min
- Auth
- API credentials
- API base URL
- https://api.trello.com/1
- Rate limits
- 300 requests per 10 seconds per API key and 100 requests per 10 seconds per token. The /1/members/ endpoints are additionally capped at 100 requests per 900 seconds.
Before you begin
- Trello account on any plan, including Free
- Membership of a Trello Workspace that can own the Power-Up. Trello issues API keys per Power-Up, so there is no standalone API key page.
- A Trello login that is a member of the boards you want PopMCP to reach
Get your credentials
Open the Power-Ups admin portal
Sign in to Trello, then open https://trello.com/power-ups/admin.
Power-Ups
Power-Ups and integrations you administer.
| Name | Workspace | Status | Created |
|---|---|---|---|
| PopMCPPrivate integration | Acme HQ | Draft | Mar 4, 2026 |
trello.com/apps/admin opens the same portal.
Create a Power-Up to own the key
Click New in the top right and fill in Name, Workspace, Email, Support Email and Author. Click Create.
Power-Ups
Power-Ups and integrations you administer.
The Workspace you pick becomes the owner of the key.
Generate the API Key
Open the new Power-Up and click API Key in the left menu. Click Generate a new API Key and copy the value labelled Key.
API Key
Keys let your integration talk to the Trello REST API.
- Key
- a1b2****9f3c
- Secret
- sh_****hidden
- Created
- Mar 4, 2026
PopMCP does not use the secret.
Authorize yourself and copy the Token
On the same page, click the hyperlinked Token to the right of your key. Click Allow, then copy the token from the page that follows.
PopMCP would like to use your account
This application will be able to act on your behalf.
The token is shown once on the next page. Copy it there.
Paste both values into PopMCP
Put the key in API Key and the token in Token, then click connect.
Connect in PopMCP
Open your workspace, choose Trello in the marketplace, and fill in the connect dialog:
| Field | What to enter |
|---|---|
| API Keytext | Go to https://trello.com/power-ups/admin, open (or create) a Power-Up, and on its "API key" tab generate an API Key. Copy the Key (you do NOT need the secret). |
| Tokensecret | On the same API key page, click the "Token" link ("you can manually generate a Token") and Allow. Or visit https://trello.com/1/authorize?expiration=never&scope=read,write,account&response_type=token&key=YOUR_KEY . Copy the token. It's sent as the token query param, stored encrypted, and used server-side only.Encrypted with AES-256-GCM on save and never shown again. |
PopMCP verifies the credential against Trello immediately. On success the connection flips to Verified and its MCP tools are provisioned.
Verify it worked
PopMCP shows the Trello connection as Connected and names the Trello member the token belongs to. Asking for your boards returns the boards in the Workspace you authorized.
Troubleshooting
The left menu shows Authorization instead of API Key
Why: Some accounts are on the newer admin layout.
Fix: Open Authorization, then Trello auth. The same key and Token link live there.
The New Power-Up form refuses to save
Why: iframe connector URL is listed as required for real Power-Ups.
Fix: Put any https URL you control in that field. PopMCP never loads it.
401 with body 'invalid token'
Why: The token was revoked, expired, or belongs to a different API key.
Fix: Re-run the Token link from the same Power-Up's API Key page with expiration=never and paste the fresh token.
401 with body 'invalid key'
Why: You pasted the Power-Up's secret instead of the API key, or the Power-Up was deleted.
Fix: Copy the value labelled Key on the API Key tab, not the secret.
429 Too Many Requests
Why: More than 300 calls per 10s on the key or 100 per 10s on the token.
Fix: Slow the tool calls down. The x-rate-limit-api-key-remaining and x-rate-limit-api-token-remaining headers show your budget.
Boards are missing from results
Why: The token only sees boards your Trello user is a member of.
Fix: Add yourself to the board, or generate the token from an account that is a member of it.
You need to revoke access
Why: The token stays valid until you disable it.
Fix: Open your Trello profile, go to Settings, then Applications, and remove the token.