> ## Documentation Index
> Fetch the complete documentation index at: https://docs.join.tl/llms.txt
> Use this file to discover all available pages before exploring further.

# Choose an access method

> Use a personal API key for a script acting as one Jointl member.

Use a personal API key for a script acting as one Jointl member. Use a service account
for an approved unattended integration with explicitly assigned companies and
permissions. Both are bearer credentials and must stay in a server-side secret store.

Use OAuth for registered client applications and MCP clients. Jointl supports the
authorization code flow with PKCE (`S256`) and rotating refresh tokens. Before starting
authorization, request a client ID from Jointl and register every redirect URI exactly.

Use MCP when a compatible AI client should discover and call Jointl tools. Use Zapier
for event-driven no-code workflows and actions approved for the Jointl Zapier app. Use
Greenhouse only for the supported recruiting webhook and assessment integration.

| Need                          | Recommended surface | Credential                                         |
| ----------------------------- | ------------------- | -------------------------------------------------- |
| Personal server script        | REST                | Personal API key                                   |
| Registered backend automation | REST                | Service account key                                |
| User-authorized application   | REST                | OAuth with PKCE                                    |
| AI assistant or agent         | MCP                 | OAuth with PKCE                                    |
| No-code workflow              | Zapier              | Zapier-managed OAuth installation                  |
| Greenhouse Recruiting         | Greenhouse          | Installation webhook secret and assessment API key |

Do not paste a Jointl API key into ChatGPT, Claude, Codex, or another hosted AI client.
Use the client's OAuth-based MCP connection instead.