Cal tools for AI agents

Call Cal's API on your own Cal account. Connect it once in the Relvo app; Relvo adds its credentials and charges no usage fee.

Connect CalSee all 418 toolsAPI docs

Try Cal now

Compose the request, copy the prompt, and run it in your agent. It runs on your connected Cal account.

Prompt composerMarkdown
Cal
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Supported Cal tools

Every Cal endpoint Relvo can call on your connected account, with no Relvo usage fee.

418 tools
Get all attributescal__organizations_attributes_controller_get_organization_bf885dCalyour accountCreate an attributecal__organizations_attributes_controller_create_organizat_89cda9Calyour accountGet an attributecal__organizations_attributes_controller_get_organization_d142c1Calyour accountUpdate an attributecal__organizations_attributes_controller_update_organizat_94b432Calyour accountDelete an attributecal__organizations_attributes_controller_delete_organizat_7b3322Calyour accountCreate an attribute optioncal__organizations_attributes_options_controller_create_o_90b538Calyour accountGet all attribute optionscal__organizations_attributes_options_controller_get_orga_eeae83Calyour accountDelete an attribute optioncal__organizations_attributes_options_controller_delete_o_86a492Calyour accountUpdate an attribute optioncal__organizations_attributes_options_controller_update_o_c9b99dCalyour accountGet all assigned attribute options by attribute IDcal__organizations_attributes_options_controller_get_orga_403be8Calyour accountGet all assigned attribute options by attribute slugcal__organizations_attributes_options_controller_get_orga_dad30eCalyour accountAssign an attribute to a usercal__organizations_attributes_options_controller_assign_o_edfd69Calyour accountGet all attribute options for a usercal__organizations_attributes_options_controller_get_orga_c2b2c9Calyour accountUpdate an attribute assignment for a usercal__organizations_attributes_options_controller_update_o_eeddefCalyour accountUnassign an attribute from a usercal__organizations_attributes_options_controller_unassign_f0c700Calyour accountGet attribute assignment history for a usercal__organizations_attributes_options_controller_get_orga_83364dCalyour accountGet attribute sync historycal__organization_attribute_sync_history_controller_get_a_2dc76bCalyour accountGet sync history for a specific usercal__organization_attribute_sync_history_controller_get_u_89f2cdCalyour accountGet organization bookings (cursor pagination)cal__organizations_bookings_controller_get_all_org_team_b_956025Calyour accountReport an organization bookingcal__organizations_bookings_controller_report_org_bookingCalyour accountBlock an organization booking attendeecal__organizations_bookings_controller_block_org_bookingCalyour accountGet organization calendar-invite defaultscal__organizations_calendar_invites_controller_get_organi_9b95d2Calyour accountUpdate organization calendar-invite defaultscal__organizations_calendar_invites_controller_update_org_938370Calyour accountGet all delegation credentials of your organizationcal__organizations_delegation_credential_controller_get_d_d04063Calyour accountSave delegation credentials for your organizationcal__organizations_delegation_credential_controller_creat_d50d6bCalyour accountGet a delegation credential of your organizationcal__organizations_delegation_credential_controller_get_d_9846e2Calyour accountUpdate delegation credentials of your organizationcal__organizations_delegation_credential_controller_updat_beb326Calyour accountDelete delegation credentials of your organizationcal__organizations_delegation_credential_controller_delet_9afaceCalyour accountReset a blocked delegation credential's secret rotation statecal__organizations_delegation_credential_controller_reset_d1abd9Calyour accountVerify a delegation credential's workspace setupcal__organizations_delegation_credential_controller_verif_04a71dCalyour account

Set up Relvo for Cal

Pick the client you use, then pick a route: Automatic is that client's own link, command or prompt, and Manual is the same install done by hand. Both end at the same OAuth sign-in, with every tool on the Cal shelf behind one connector.

Automatic way

Open the plugin page with the details ready.

ChatGPT takes custom MCP servers as plugins. The button opens the right page; copy the name and URL into the form and authorise once.

Open ChatGPT plugins

  1. Add a custom MCP server

    On the plugins page, click + and choose Add custom MCP server.

  2. Fill in the connection

    NameRelvo
    Connectionhttps://app.relvo.si/mcp

  3. Authorise and create

    Pick OAuth, tick the confirmation and click Create as a plugin. Approve Relvo in the browser window ChatGPT opens.

  4. Ask for the right tool

    PROMPT
    Using Relvo, find the right Cal tool to get all attributes and run it on my Cal connection. Return Cal's response as it comes back.

    The client picks the matching operations and runs them on your connected account.

Custom MCP servers are set up in ChatGPT on the web, not in the mobile app. Connect once and every chat can call Relvo.

Manual way

Set it up from ChatGPT's settings.

The same connector, reached through the settings menu instead of the plugin page.

  1. Open Apps & Connectors

    In ChatGPT, open Settings → Apps & Connectors and create a new custom connector.

  2. Name it Relvo

    NameRelvo

  3. Point it at Relvo

    Connectionhttps://app.relvo.si/mcp

  4. Authenticate

    Choose OAuth, continue, and approve Relvo in the browser. ChatGPT saves the connector to your account.

  5. Ask for the right tool

    PROMPT
    Using Relvo, find the right Cal tool to get all attributes and run it on my Cal connection. Return Cal's response as it comes back.

    The agent picks the matching operations, runs them on your connection, then relays the provider's response verbatim.

All 418 Cal operations run on your connected Cal account. Relvo charges no usage fee; Cal may bill that account on its own plan.

Automatic way

One link fills in the dialog.

On a desktop browser this opens Claude's Add custom connector form with Relvo's name and MCP URL already in place. Click Add and sign in — there is nothing to type.

Add the Relvo connector

  1. Open the dialog

    Click the button above in the browser where you are signed in to Claude. Customize → Connectors opens with the custom-connector form ready.

  2. Add and authorise

    Click Add, then choose Sign in now under Authentication. Relvo signs you in over OAuth, so no token or API key is pasted into Claude.

  3. Ask for the right tool

    PROMPT
    Using Relvo, find the right Cal tool to get all attributes and run it on my Cal connection. Return Cal's response as it comes back.

    The client picks the matching operations and runs them on your connected account.

Manual way

The same connector, typed by hand.

Use this on a phone, in a locked-down workspace, or whenever you would rather add the connector through Claude's own menu.

  1. Open Connectors

    In Claude, go to Customize → Connectors and choose + Add → Add custom connector.

  2. Name the connector

    NameRelvo

  3. Paste the MCP URL

    Server URLhttps://app.relvo.si/mcp

  4. Sign in

    Click Add, choose Sign in now under Authentication, and approve Relvo in the OAuth window. The Relvo tools appear under the connector.

  5. Ask for the right tool

    PROMPT
    Using Relvo, find the right Cal tool to get all attributes and run it on my Cal connection. Return Cal's response as it comes back.

    The agent picks the matching operations, runs them on your connection, then relays the provider's response verbatim.

All 418 Cal operations run on your connected Cal account. Relvo charges no usage fee; Cal may bill that account on its own plan.

Automatic way

One command, then one sign-in.

The CLI registers Relvo with HTTP transport and writes it into your Claude Code config; authentication happens in the browser.

  1. Run the command

    BASH
    claude mcp add --transport http relvo https://app.relvo.si/mcp

  2. Authenticate once

    Open a session and run /mcp. Choose Relvo → Authenticate; Claude Code opens Relvo's OAuth page and stores the token for the project.

  3. Check the list

    BASH
    claude mcp list

    Relvo shows as connected, with every catalog tool behind it.

  4. Ask for the right tool

    PROMPT
    Using Relvo, find the right Cal tool to get all attributes and run it on my Cal connection. Return Cal's response as it comes back.

    The client picks the matching operations and runs them on your connected account.

The command uses local scope by default. Add --scope user to make Relvo available in every project, or --scope project to share it through the repository.

Manual way

Write it into .mcp.json.

Project scope lives in a file, so the whole team gets Relvo without running a command.

  1. Add the server

    JSON · .mcp.json
    {
  "mcpServers": {
    "relvo": {
      "type": "http",
      "url": "https://app.relvo.si/mcp"
    }
  }
}

    Create .mcp.json in the project root and add relvo as an HTTP server.

  2. Reload and sign in

    Start a Claude Code session, run /mcp, choose Relvo → Authenticate, then reload. The tools are available in that project.

  3. Ask for the right tool

    PROMPT
    Using Relvo, find the right Cal tool to get all attributes and run it on my Cal connection. Return Cal's response as it comes back.

    The agent picks the matching operations, runs them on your connection, then relays the provider's response verbatim.

The same entry works for every project when it is added at user scope instead of project scope. All 418 Cal operations run on your connected Cal account. Relvo charges no usage fee; Cal may bill that account on its own plan.

Automatic way

Hand the setup to Hermes.

Hermes can edit its own config, so one instruction is enough: it writes Relvo into mcp_servers, reloads, and reports the tools it can now call.

  1. Copy the setup prompt

    PROMPT
    Add Relvo as a remote MCP server named "relvo": url https://app.relvo.si/mcp, auth oauth. Follow https://app.relvo.si/SKILL.md, reload MCP, then list the Relvo tools.

  2. Paste it into a Hermes session

    Hermes adds the remote server to ~/.hermes/config.yaml and reloads its MCP connections.

  3. Approve the sign-in

    Open the OAuth link Hermes prints and approve Relvo once. The token is cached, so later sessions do not ask again.

  4. Ask for the right tool

    PROMPT
    Using Relvo, find the right Cal tool to get all attributes and run it on my Cal connection. Return Cal's response as it comes back.

    The client picks the matching operations and runs them on your connected account.

Manual way

Add it to ~/.hermes/config.yaml.

Two settings and one reload — the same entry Hermes would write itself.

  1. Open the config

    Edit ~/.hermes/config.yaml, the file Hermes reads at start-up.

  2. Add the server

    YAML
    mcp_servers:
  Relvo:
    url: https://app.relvo.si/mcp
    auth: oauth

  3. Reload and sign in

    In a session, run /reload-mcp, then approve the OAuth prompt Hermes shows. Tokens are cached under ~/.hermes/mcp-tokens/.

  4. Ask for the right tool

    PROMPT
    Using Relvo, find the right Cal tool to get all attributes and run it on my Cal connection. Return Cal's response as it comes back.

    The agent picks the matching operations, runs them on your connection, then relays the provider's response verbatim.

All 418 Cal operations run on your connected Cal account. Relvo charges no usage fee; Cal may bill that account on its own plan.

Automatic way

Hand the install to Cursor.

The button opens Cursor's MCP install dialog with the server name and URL already attached.

Add Relvo to Cursor

  1. Open the install prompt

    Click the button on the machine where Cursor is installed. Cursor receives a server named relvo pointing at https://app.relvo.si/mcp.

  2. Install and authenticate

    Confirm the install, then click Authenticate. Cursor completes Relvo's OAuth in the browser.

  3. Ask for the right tool

    PROMPT
    Using Relvo, find the right Cal tool to get all attributes and run it on my Cal connection. Return Cal's response as it comes back.

    The client picks the matching operations and runs them on your connected account.

The install link opens Cursor directly, so it does nothing in a browser that has never installed the editor.

Manual way

Edit ~/.cursor/mcp.json.

Use the global or the project file when you want the entry under your own control.

  1. Open the MCP config

    Edit ~/.cursor/mcp.json for every project, or .cursor/mcp.json inside the repository for one.

  2. Add Relvo

    JSON
    {
  "mcpServers": {
    "relvo": {
      "url": "https://app.relvo.si/mcp"
    }
  }
}

  3. Reload Cursor

    Save the file and reload the window. Relvo appears in the MCP panel, and Authenticate finishes the sign-in.

  4. Ask for the right tool

    PROMPT
    Using Relvo, find the right Cal tool to get all attributes and run it on my Cal connection. Return Cal's response as it comes back.

    The agent picks the matching operations, runs them on your connection, then relays the provider's response verbatim.

All 418 Cal operations run on your connected Cal account. Relvo charges no usage fee; Cal may bill that account on its own plan.

Automatic way

Ask the Bot to wire it up.

Grok Bot configures connections from the conversation, so the quickest route is a single instruction with Relvo's address.

  1. Copy the setup prompt

    PROMPT
    Add a custom MCP server called relvo at https://app.relvo.si/mcp with OAuth sign-in, then list the Relvo tools.

  2. Paste it into a Bot chat

    The Bot repeats the server name and URL and asks you to confirm. Check them and select Add it.

  3. Authorise

    Select Authorize on the card the Bot sends and approve Relvo in the browser once. The Bot can then call the catalog from any chat.

  4. Ask for the right tool

    PROMPT
    Using Relvo, find the right Cal tool to get all attributes and run it on my Cal connection. Return Cal's response as it comes back.

    The client picks the matching operations and runs them on your connected account.

Manual way

Name the server yourself in the chat.

Grok Bot's settings have no field for a server URL; custom MCP servers are added from the conversation.

  1. Describe the server

    NameRelvo
    Server URLhttps://app.relvo.si/mcp

    Ask the Bot to add a custom server with this name and URL. Say custom server, or it may offer a catalog plugin instead.

  2. Confirm

    The Bot repeats the name and URL. Check that the URL is https://app.relvo.si/mcp, then select Add it.

  3. Authorise

    Select Authorize on the card the Bot sends, sign in and allow access. The Relvo tools appear once you are signed in.

  4. Ask for the right tool

    PROMPT
    Using Relvo, find the right Cal tool to get all attributes and run it on my Cal connection. Return Cal's response as it comes back.

    The agent picks the matching operations, runs them on your connection, then relays the provider's response verbatim.

All 418 Cal operations run on your connected Cal account. Relvo charges no usage fee; Cal may bill that account on its own plan.

Use Cal with any agent

Pick the client you already use. Every one reaches the same catalog through one Relvo key.

All agents
ChatGPTUse Cal with ChatGPTClaudeUse Cal with ClaudeClaude CodeUse Cal with Claude CodeHermes AgentUse Cal with Hermes AgentCursorUse Cal with CursorGrok BotUse Cal with Grok BotCodexUse Cal with CodexOpenClawUse Cal with OpenClawAny MCP ClientUse Cal with Any MCP Client

Explore other platforms

Other shelves in the same catalog. One key reaches all of them.

Browse all platforms
Google SearchBrowse Google Search in the Relvo app. Inspect each tool and compare providers before running a call.11 endpointsXBrowse X in the Relvo app. Inspect each tool and compare providers before running a call.332 endpointsInstagramBrowse Instagram in the Relvo app. Inspect each tool and compare providers before running a call.208 endpointsTikTokBrowse TikTok in the Relvo app. Inspect each tool and compare providers before running a call.231 endpoints

Frequently asked questions

Short answers about the key, the price and the call itself.

Give your agent Cal and 147,361 tools

One token reaches your Cal account and every catalog tool. Start free.

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