App

OnceOnly integrations

Connect OnceOnly to any other app, or use it from your AI client over MCP. OnceOnly is an idempotency API that prevents duplicate automation runs by blocking repeated events in automation workflows.

Connects with an API keyonceonly.tech
11 actions

What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it.

Build solutions, not workarounds.

What do you want to automate with OnceOnly?

Ask the assistant

You'll sign in before anything runs. What you typed comes with you.

Connect your AI client

Give your AI client this address.

https://mcp.apiant.ai

Any client that takes a remote MCP server. Nothing to install. Create your free account, then sign in once in your browser.

Set it up in your client
Claude Code

Run this in the directory you want to work in.

claude mcp add --transport http -s project apiant-ai https://mcp.apiant.ai

Start Claude Code there, approve the server, and sign in in the browser page it opens.

Claude Code guide (opens in a new tab)
Claude, web and desktop

Open Customize, then Connectors, then Add custom connector, and paste the address. On Team and Enterprise an owner adds it first.

Setup guide (opens in a new tab)
Cursor

Add the address to your MCP configuration as a server URL. Cursor signs you in in your browser.

Setup guide (opens in a new tab)
Zed

Open Settings, then AI, then MCP Servers, then Add Server, then Add Remote Server.

Setup guide (opens in a new tab)
Codex and the ChatGPT desktop app

Open Settings, then MCP servers, then Add server, and choose Streamable HTTP. From the terminal, Codex takes the address with its own add command and then signs you in.

Setup guide (opens in a new tab)
Any other MCP client

Paste the address where the client asks for a remote MCP server URL, and name the server apiant-ai where it lets you. APIANT's skills reach the client over the same connection.

Setup guide (opens in a new tab)

Popular

OnceOnly with the apps people pair it with most

Pair it

Connect OnceOnly with another app

What your agent can do with OnceOnly

Triggers and actions 11 actions

  • Action
    Add event

    Adds an event to an agent run's timeline in OnceOnly, such as a step starting, a tool call, or a failure.

  • Action
    Add policy

    Creates or updates the governance policy for an agent, such as rate limits, spend limits and allowed or blocked tools.

  • Action
    Add tool

    Creates or updates a tool in your OnceOnly tool registry, pointing at your backend URL. Returns the saved tool without its secret.

  • Action
    Check & Lock

    Checks an idempotency key and locks it if it is new, telling you whether the event is a first occurrence or a duplicate.

  • Action
    Delete tool

    Permanently deletes a tool from your OnceOnly tool registry.

  • Action
    Get policy

    Returns the governance policy configured for an agent.

  • Action
    Get run

    Returns a run's timeline: the run id, the total number of events and the list of events recorded for it.

  • Action
    Get tool

    Returns the details of a registered tool by name, including its URL, scope, enabled state and retry settings.

  • Action
    List policies

    Returns every agent policy on the OnceOnly account, each with its agent id and policy settings.

  • Action
    List runs

    Returns the runs recorded on your OnceOnly account, with each run's latest status and event count.

  • Action
    List tools

    Returns the tools registered in your OnceOnly tool registry for a scope.

Reviews

What our customers say

Questions

OnceOnly, answered

Is there a OnceOnly MCP server?

APIANT's MCP server at https://mcp.apiant.ai works with OnceOnly. Add that address to any AI client that takes a remote MCP server, sign in once in your browser, and your client can build, test and run automations that use OnceOnly. Nothing to install.

What can your agent do in OnceOnly?

Any of OnceOnly's 11 actions, including Add event, Add policy, Add tool and Check & Lock. Your agent maps the data both ways and tests every scenario before it ships.

Which apps can OnceOnly connect to?

Any app in the catalog; the list on this page pairs OnceOnly with each of them. If the other app is missing, point your agent at its API documentation and it builds the connector.

What happens when something fails?

Your agent works that out for you. It plans the failure paths along with the happy path, then tests every scenario before it ships.

Is there a free plan?

Yes. Every plan includes the agent, including free, and building from your own AI client spends no assistant credits.