MCP Rubber Duck vs Portkey Admin MCP
A side-by-side look at the MCP Rubber Duck and Portkey Admin MCP MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose MCP Rubber Duck for conversational ai work as a local process; choose Portkey Admin MCP for conversational ai as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose MCP Rubber Duck when
- You need dedicated capabilities in the Conversational AI domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: API key required.
- You want tools like
ask_duck, chat_with_duck, clear_conversations.
Choose Portkey Admin MCP when
- You need dedicated capabilities in the Conversational AI domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: API key required.
- You have the keys it needs:
PORTKEY_API_KEY. - You want tools like
list_all_users, invite_user, get_user_stats.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Conversational AI | Conversational AI |
| Quality signal | 68/100 · Great | 65/100 · Great |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Local subprocess (stdio) |
| Auth | API key required | API key required |
| Pricing | BYOK (pay the provider) | BYOK (pay the provider) |
| Required env vars | None listed | PORTKEY_API_KEY |
| Verified owner | Community listing | Community listing |
| GitHub stars | 180 | 6 |
| Directory activity | 5 views 0 installs 0 upvotes | 2 views 0 installs 0 upvotes |
| Tools | 15 | 184 |
| Full listing | View MCP Rubber Duck | View Portkey Admin MCP |
Tools & capabilities
MCP Rubber Duck tools 15
ask_duckAsk a single question to a specific LLM providerchat_with_duckConversation with context maintained across messagesclear_conversationsClear all conversation historylist_ducksList configured providers and health statuslist_modelsList available models for providerscompare_ducksAsk the same question to multiple providers simultaneouslyduck_councilGet responses from all configured ducksget_usage_statsUsage statistics and estimated costsduck_voteMulti-duck voting with reasoning and confidenceduck_judgeHave one duck evaluate and rank others' responsesduck_iterateIteratively refine a response between two ducksduck_debateStructured multi-round debate between ducks- +3 more on the listing page
Portkey Admin MCP tools 184
list_all_usersList accepted org users with id, name, email, role, and timestamps. Use this to find a user_id before get_user, update_user, delete_user, or add_workspace_member; use list_user_invites for pending invitations. Enterprise-gated. Returns 403 on non-Enterprise Portkey plans.invite_userInvite a new org user and optionally provision workspace access and an API key in one call. Workspace assignments apply only after acceptance; use add_workspace_member or update_workspace_member later for follow-up changes.get_user_statsReturn per-user request and cost analytics for a required time range. This is usage-by-user, not population metrics; use get_users_analytics for active-user or cohort trends. Enterprise-gated. Returns 403 on non-Enterprise Portkey plans.get_userGet one accepted user by id and return their profile, role, and timestamps. Use list_all_users to find the id if you only have a name or email, and get_user_invite for pending invitations. Enterprise-gated. Returns 403 on non-Enterprise Portkey plans.update_userUpdate a user's first name, last name, or organization role by id. Email and workspace roles are not editable here; use update_workspace_member for workspace membership changes.delete_userDelete a user from the org by id. This is permanent, removes org and workspace memberships, revokes API keys, and ends active sessions; use delete_user_invite for pending invites instead.list_user_invitesList pending and sent invitations with id, email, role, status, and expiry. Use this to check invite state; use list_all_users for users who already accepted. Enterprise-gated. Returns 403 on non-Enterprise Portkey plans.get_user_inviteGet one invitation by invite id and return its email, role, status, and expiry. Use this for pending invites only; use get_user for accepted users.delete_user_inviteDelete a pending invite and revoke its invite link. This does not affect existing users; use delete_user for full user removal.resend_user_inviteResend the email for a pending invite that has not been accepted, unlike invite_user which creates a new invite. This sends a fresh email without modifying the invite record, expiry, or role; use get_user_invite first if you are unsure whether the invite still exists and list_user_invites to discover invite_ids.list_scim_workspace_mappingsList identity-provider SCIM group mappings that automatically grant Portkey workspace roles. Use it to audit provisioned access or obtain mapping_id before delete_scim_workspace_mapping; filter by workspace, group, or role and page through large directories. This reads mappings only and does not query individual workspace members. Enterprise-gated. Returns 403 on non-Enterprise Portkey plans.create_scim_workspace_mappingMap one identity-provider SCIM group to a Portkey workspace role so current and future group members receive access automatically. Provide exactly one of scim_group_id or scim_group_name; a name can pre-create the Portkey SCIM group before the IdP provisions it. Use list_scim_groups to discover existing groups and list_workspaces for the workspace ID. This changes access provisioning and is distinct from add_workspace_member, which grants one user directly. Enterprise-gated. Returns 403 on non-Enterprise Portkey plans.- +172 more on the listing page
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
MCP Rubber Duck
{
"mcpServers": {
"nesquikm-mcp-rubber-duck": {
"command": "npx",
"args": [
"-y",
"mcp-rubber-duck"
]
}
}
}
Portkey Admin MCP
{
"mcpServers": {
"portkey-admin-mcp": {
"command": "npx",
"args": [
"-y",
"portkey-admin-mcp"
],
"env": {
"PORTKEY_API_KEY": "YOUR_PORTKEY_API_KEY_HERE"
}
}
}
}
Frequently asked questions
MCP Rubber Duck is categorized under Conversational AI and uses a local stdio subprocess. Portkey Admin MCP belongs to Conversational AI and uses a local stdio subprocess. Pick MCP Rubber Duck for conversational ai work and Portkey Admin MCP for conversational ai.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
MCP Rubber Duck is bring-your-own-key: usage is billed by the API provider you supply a key for. Auth: api key required. Portkey Admin MCP is bring-your-own-key: usage is billed by the API provider you supply a key for. Auth: api key required. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add nesquikm-mcp-rubber-duck and portkey-admin-mcp as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, MCP Rubber Duck has a quality signal of 68/100 (Great) with 5 views, 0 installs and 180 GitHub stars. Portkey Admin MCP has 65/100 (Great) with 2 views, 0 installs and 6 GitHub stars.