0n3
MCP servers · Cohere · connector · GPT action

Connect ChatGPT to Cohere

One line gives ChatGPT your Cohere account as tools: 6 endpoints, generate, embed, rerank, 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 Cohere first

Three steps

  1. Create a free 0n3 account and connect Cohere. 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: "Generate in Cohere".
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 Cohere

Generate · Text generation and chat1
GeneratePOST /v1/generate
Embed · Create text embeddings1
EmbedPOST /v2/embed
Rerank · Rerank search results1
RerankPOST /v2/rerank
Classify · Text classification1
ClassifyPOST /v1/classify
More · Everything else this app exposes.2
ChatPOST /v2/chat
List modelsGET /v1/models

Cohere in other AI clients

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

ChatGPT with other apps

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