Use the same three-step flow everywhere
The LeadCeleris remote MCP endpoint is https://app.leadceleris.com/api/mcp. Add that URL to a supported client, choose Connect or Authenticate, then sign in to LeadCeleris and approve the workspace.
MCP uses OAuth 2.1. Do not create an API key, add an Authorization header, or expose a LeadCeleris secret through a client environment variable.
- Add https://app.leadceleris.com/api/mcp as a remote or Streamable HTTP MCP server
- Choose Connect, Sign in, or Authenticate in the client
- Sign in to LeadCeleris, confirm the workspace, and choose Authorize
Connect ChatGPT web
In ChatGPT, open Plugins or your workspace connector builder. Add a remote MCP server, paste the LeadCeleris MCP URL, save it, and choose Connect or Sign in.
Complete the LeadCeleris login in the browser and approve the workspace. Hosted ChatGPT does not need access to an environment variable because the connection stores refreshable OAuth credentials.
Connect OpenAI Codex
In ~/.codex/config.toml, add [mcp_servers.leadceleris], set url to https://app.leadceleris.com/api/mcp, set auth to "oauth", and set default_tools_approval_mode to "writes".
Restart Codex and select Authenticate in MCP settings. CLI users can run codex mcp login leadceleris. Sign in in the browser and approve the workspace.
Connect Claude Code
Run claude mcp add --transport http --scope user leadceleris https://app.leadceleris.com/api/mcp. Start Claude Code, enter /mcp, select LeadCeleris, and choose Authenticate.
Complete the browser login and approve the workspace. For Claude.ai or another hosted MCP client, add the same remote URL and use its Connect or Authenticate action.
Verify safely and disconnect
Start with: "Show my LeadCeleris workspace overview. Read only and do not change data." Confirm the organization and recent CRM totals before approving a write tool.
LeadCeleris shows read and write access during authorization and limits the token to the approved workspace. To disconnect, clear or revoke authentication from the client and remove the MCP server entry if it is no longer needed.