Coding tools

Every config file uses a different key name — mcpServers, servers, context_servers, mcp_servers — and some need url while others need serverUrl or an extra type. Copying a working snippet from one tool into another is the most common failure. Use the block from the matching section.

Claude Code (terminal)

Add the server:
```
claude mcp add --transport http erzycall https://app.erzycall.com/api/mcp
```
Add --scope user to make it available in every project, or --scope project to write a shared .mcp.json your team can commit.
Sign in. Inside a Claude Code session type /mcp and pick ErzyCall — your browser opens for the OAuth flow. From a plain shell:
```
claude mcp login erzycall
```
Confirm it worked:
```
claude mcp list
```
You want ✔ Connected next to erzycall.

Headless / SSH. On a machine with no browser, use claude mcp login erzycall --no-browser and open the printed URL elsewhere. Non-interactive runs (claude -p, the Agent SDK) cannot perform OAuth — authenticate once from an interactive session first.

Cursor

Option A — the one-click link

If Cursor is installed, this link adds ErzyCall for you:

cursor://anysphere.cursor-deeplink/mcp/install?name=erzycall&config=eyJ1cmwiOiJodHRwczovL2FwcC5lcnp5Y2FsbC5jb20vYXBpL21jcCJ9

Option B — edit the config file

Create or open ~/.cursor/mcp.json (every project) or .cursor/mcp.json in your project folder (that project only).
Paste this. If the file already has other servers, add just the "erzycall" block inside the existing mcpServers.
~/.cursor/mcp.json
```
{
  "mcpServers": {
    "erzycall": {
      "url": "https://app.erzycall.com/api/mcp"
    }
  }
}
```
Open the Customize page in Cursor's sidebar, find erzycall under MCP, and complete the sign-in prompt.

Why there's no type field. Cursor treats any entry with a url as a remote server automatically. Adding "type": "http" is a common copy-paste mistake and can cause the entry to be ignored.

Hermes

Hermes Agent (Nous Research) uses YAML, not JSON. Indentation matters — two spaces, never tabs.

Option A — the CLI

hermes mcp add erzycall --url https://app.erzycall.com/api/mcp --auth oauth
hermes mcp login erzycall

Option B — edit the config file

Open ~/.hermes/config.yaml.

Add (or extend) the mcp_servers section:

~/.hermes/config.yaml

mcp_servers:
  erzycall:
    url: "https://app.erzycall.com/api/mcp"
    auth: oauth

From a fresh terminal window, run hermes mcp login erzycall and complete the browser sign-in.
Verify with hermes mcp test erzycall.

If you edit config.yaml while a Hermes session is open, it auto-reloads with a 30-second timeout — not enough to finish an OAuth sign-in, so it will appear to fail. Always run hermes mcp login from a separate, fresh terminal, which gives you a 5-minute window.

Tools appear to the model as mcp_erzycall_<tool>, e.g. mcp_erzycall_create_call. Tokens are cached at ~/.hermes/mcp-tokens/erzycall.json.

VS Code (Copilot agent mode)

Guided way

Press Ctrl/Cmd + Shift + P and run MCP: Add Server.
Choose HTTP, paste https://app.erzycall.com/api/mcp, name it erzycall.
Pick Workspace (this project) or Global (everywhere). VS Code opens a browser for sign-in on first use.

Manual way

.vscode/mcp.json

{
  "servers": {
    "erzycall": {
      "type": "http",
      "url": "https://app.erzycall.com/api/mcp"
    }
  }
}

Unlike Cursor, VS Code requires the type field, and the top-level key is servers, not mcpServers.

One-liner from a terminal:

code --add-mcp "{\"name\":\"erzycall\",\"type\":\"http\",\"url\":\"https://app.erzycall.com/api/mcp\"}"

If you use Agent Host. It doesn't read .vscode/mcp.json directly. For config that works across every Copilot surface, put the same servers block in .mcp.json at your workspace root, or in ~/.copilot/mcp-config.json.

Windsurf / Devin Desktop

Windsurf is now Devin Desktop (Cognition), and it has two agents that read different config files. Putting the config in the wrong file is the number one reason it "doesn't show up."

Devin Local agent (default for new tabs)

devin mcp add erzycall https://app.erzycall.com/api/mcp
devin mcp login erzycall

Or edit .devin/mcp_config.local.json (this project, private), .devin/mcp_config.json (project, shared), or ~/.config/devin/mcp_config.json — on Windows, %APPDATA%\devin\mcp_config.json:

~/.config/devin/mcp_config.json

{
  "mcpServers": {
    "erzycall": {
      "url": "https://app.erzycall.com/api/mcp",
      "transport": "http"
    }
  }
}

Legacy Cascade agent

Note the key is serverUrl, not url:

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "erzycall": {
      "serverUrl": "https://app.erzycall.com/api/mcp"
    }
  }
}

Zed

Guided way

Settings → AI → MCP Servers.
Click Add Server, then Add Remote Server.
Name it erzycall, paste https://app.erzycall.com/api/mcp, and leave the header field empty.
Zed prompts you to sign in. The indicator dot turns green when it's live.

Manual way

Zed settings.json

{
  "context_servers": {
    "erzycall": {
      "url": "https://app.erzycall.com/api/mcp"
    }
  }
}

Don't add a header. Zed only offers the OAuth sign-in when there is no Authorization header configured. If you add one, Zed assumes you're handling auth yourself and the sign-in prompt never appears.

Claude Code (terminal)

Add the server:
```
claude mcp add --transport http erzycall https://app.erzycall.com/api/mcp
```
Add --scope user to make it available in every project, or --scope project to write a shared .mcp.json your team can commit.
Sign in. Inside a Claude Code session type /mcp and pick ErzyCall — your browser opens for the OAuth flow. From a plain shell:
```
claude mcp login erzycall
```
Confirm it worked:
```
claude mcp list
```
You want ✔ Connected next to erzycall.

Cursor

Option A — the one-click link

If Cursor is installed, this link adds ErzyCall for you:

cursor://anysphere.cursor-deeplink/mcp/install?name=erzycall&config=eyJ1cmwiOiJodHRwczovL2FwcC5lcnp5Y2FsbC5jb20vYXBpL21jcCJ9

Option B — edit the config file

Create or open ~/.cursor/mcp.json (every project) or .cursor/mcp.json in your project folder (that project only).
Paste this. If the file already has other servers, add just the "erzycall" block inside the existing mcpServers.
~/.cursor/mcp.json
```
{
  "mcpServers": {
    "erzycall": {
      "url": "https://app.erzycall.com/api/mcp"
    }
  }
}
```
Open the Customize page in Cursor's sidebar, find erzycall under MCP, and complete the sign-in prompt.

Why there's no type field. Cursor treats any entry with a url as a remote server automatically. Adding "type": "http" is a common copy-paste mistake and can cause the entry to be ignored.

Hermes

Hermes Agent (Nous Research) uses YAML, not JSON. Indentation matters — two spaces, never tabs.

Option A — the CLI

hermes mcp add erzycall --url https://app.erzycall.com/api/mcp --auth oauth
hermes mcp login erzycall

Option B — edit the config file

Open ~/.hermes/config.yaml.

Add (or extend) the mcp_servers section:

~/.hermes/config.yaml

mcp_servers:
  erzycall:
    url: "https://app.erzycall.com/api/mcp"
    auth: oauth

From a fresh terminal window, run hermes mcp login erzycall and complete the browser sign-in.
Verify with hermes mcp test erzycall.

Tools appear to the model as mcp_erzycall_<tool>, e.g. mcp_erzycall_create_call. Tokens are cached at ~/.hermes/mcp-tokens/erzycall.json.

VS Code (Copilot agent mode)

Guided way

Press Ctrl/Cmd + Shift + P and run MCP: Add Server.
Choose HTTP, paste https://app.erzycall.com/api/mcp, name it erzycall.
Pick Workspace (this project) or Global (everywhere). VS Code opens a browser for sign-in on first use.

Manual way

.vscode/mcp.json

{
  "servers": {
    "erzycall": {
      "type": "http",
      "url": "https://app.erzycall.com/api/mcp"
    }
  }
}

Unlike Cursor, VS Code requires the type field, and the top-level key is servers, not mcpServers.

One-liner from a terminal:

code --add-mcp "{\"name\":\"erzycall\",\"type\":\"http\",\"url\":\"https://app.erzycall.com/api/mcp\"}"

Windsurf / Devin Desktop

Windsurf is now Devin Desktop (Cognition), and it has two agents that read different config files. Putting the config in the wrong file is the number one reason it "doesn't show up."

Devin Local agent (default for new tabs)

devin mcp add erzycall https://app.erzycall.com/api/mcp
devin mcp login erzycall

Or edit .devin/mcp_config.local.json (this project, private), .devin/mcp_config.json (project, shared), or ~/.config/devin/mcp_config.json — on Windows, %APPDATA%\devin\mcp_config.json:

~/.config/devin/mcp_config.json

{
  "mcpServers": {
    "erzycall": {
      "url": "https://app.erzycall.com/api/mcp",
      "transport": "http"
    }
  }
}

Legacy Cascade agent

Note the key is serverUrl, not url:

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "erzycall": {
      "serverUrl": "https://app.erzycall.com/api/mcp"
    }
  }
}

Zed

Guided way

Settings → AI → MCP Servers.
Click Add Server, then Add Remote Server.
Name it erzycall, paste https://app.erzycall.com/api/mcp, and leave the header field empty.
Zed prompts you to sign in. The indicator dot turns green when it's live.

Manual way

Zed settings.json

{
  "context_servers": {
    "erzycall": {
      "url": "https://app.erzycall.com/api/mcp"
    }
  }
}

Claude Code (terminal)

Cursor

Option A — the one-click link

Option B — edit the config file

Hermes

Option A — the CLI

Option B — edit the config file

VS Code (Copilot agent mode)

Guided way

Manual way

Windsurf / Devin Desktop

Devin Local agent (default for new tabs)

Legacy Cascade agent

Zed

Guided way

Manual way

On this page

Coding tools

Claude Code (terminal)

Cursor

Option A — the one-click link

Option B — edit the config file

Hermes

Option A — the CLI

Option B — edit the config file

VS Code (Copilot agent mode)

Guided way

Manual way

Windsurf / Devin Desktop

Devin Local agent (default for new tabs)

Legacy Cascade agent

Zed

Guided way

Manual way

On this page