0n3
MCP servers · Brevo · connector · GPT action

Connect ChatGPT to Brevo

One line gives ChatGPT your Brevo account as tools: 8 endpoints, send email, contacts, send sms, called with your own connection. No key in the prompt, a receipt for every call, revoke ChatGPT's access alone any time.

Get the line for ChatGPTConnect Brevo first

Three steps

  1. Create a free 0n3 account and connect Brevo. Paste a key or sign in; it lands in your vault, encrypted.
  2. Install 0n3 into ChatGPT. A custom connector in Developer mode, or an Action on a custom GPT from the OpenAPI spec.
  3. Ask ChatGPT: whoami. Then: "Send a transactional in Brevo".
Custom connector (needs Developer mode)
  1. Settings → Connectors (or Apps) → Advanced → Developer mode on
  2. Create → name 0n3 · MCP server URL https://0n3.app/mcp · Authentication: OAuth
  3. Finish the sign-in with your 0n account
  4. Enable the connector in a chat and ask: "whoami"

ChatGPT connectors cannot send a static header, so 0n3 signs you in through its OAuth door (dynamic client registration is on).

The line above carries a placeholder; 0n3.app/install mints a real key named for ChatGPT and fills it in.

What ChatGPT can then do in Brevo

Send email · Send transactional and campaign emails1
Send a transactionalPOST /smtp/email
Contacts · Manage contact lists5
List contactsGET /contacts
Create a contactPOST /contacts
Update a contactPUT /contacts/{identifier}
Get a contactGET /contacts/{identifier}
List listsGET /contacts/lists
Send sms · Send SMS messages1
Send smsPOST /transactionalSMS/sms
More · Everything else this app exposes.1
Get an accountGET /account

Brevo in other AI clients

Claude Code + BrevoMCP server + skillClaude (desktop & claude.ai) + BrevoconnectorCodex CLI + BrevoMCP serverGemini CLI + BrevoMCP serverCursor + BrevoMCP serverVS Code (Copilot) + BrevoMCP serverWindsurf + BrevoMCP server

ChatGPT with other apps

Hostinger363 endpointsTelegram132 endpointsPipedrive95 endpointsResend67 endpointsSquare57 endpointsLinkedIn50 endpointsSlack45 endpointsFigma32 endpointsCloudConvert32 endpointseBay25 endpointsQuickBooks21 endpointsCloudflare21 endpoints