Ask Immiscible before acting, from any agent builder

More and more agents are built in tools rather than code: Copilot Studio, ChatGPT, Agentforce, n8n, Zapier, Make, Lindy, Relevance AI. Each of them can call an outside service before an agent acts. This page says which way in each one offers, and what to import.

#The four operations

Every route below already exists; the OpenAPI file describes them so a builder can import them as actions.

Operation	Route	What it does
`requestDecision`	`POST /v1/actions/authorize`	Ask before acting. The answer is `allow` with a signed receipt, `deny` with reasons, or `approval_required`
`getDecision`	`GET /v1/actions/{id}`	The decision as it stands; after a person approves, it is `allow` with the receipt
`notifyWhenDecided`	`POST /v1/actions/{id}/callback`	Give one URL to be called when a person decides, so a workflow can wait rather than poll
`recordOutcome`	`POST /v1/actions/{id}/settle`	Say what actually happened: completed, failed or cancelled
`verifyReceipt`	`POST /v1/verify`	For whoever receives a receipt. Needs no key; a receipt verifies once

Each call carries an agent key (ask_...), from Agents, Add an agent, then Collect the agent’s key on its setup page, as Authorization: Bearer or as the x-api-key header. The key belongs to one agent, so every decision is recorded against the agent that asked. It can ask, check and settle; it can never approve.

#The files

File	Format	For
`https://immiscible.fly.dev/openapi.json`	OpenAPI 3.1	ChatGPT custom GPT actions, and anything that reads 3.1
`https://immiscible.fly.dev/downloads/immiscible-openapi-3.0.json`	OpenAPI 3.0.3	Importers that read 3.0 but not 3.1, such as Salesforce External Services
`https://immiscible.fly.dev/downloads/immiscible-power-platform.swagger.json`	Swagger 2.0	A Power Platform custom connector: Copilot Studio, Power Automate
`https://immiscible.fly.dev/downloads/n8n-ask-immiscible.json`	n8n workflow	n8n

All three descriptions come from one source, so they never disagree. They describe what a key or token can reach: every operation names its client errors (4XX, in the shared error shape), and every response the immiscible-version header. The routes the console itself uses, which need a signed-in person’s session, are only in https://immiscible.fly.dev/openapi.json?include=internal, marked x-internal.

#Which way in

Builder	Mechanism	Guide
Microsoft Copilot Studio	Connect by MCP (OAuth or an API key), or import our connector	Copilot Studio
ChatGPT	Connect by MCP in developer mode, or import our OpenAPI as a custom GPT action	below
Salesforce Agentforce	Import our OpenAPI 3.0 as an External Service	below
n8n	Recipe, with a workflow to import	n8n
Zapier	Recipe: Webhooks by Zapier and a catch hook	Zapier
Make	Recipe: the HTTP module and a custom webhook	Make
Lindy, Relevance AI	Connect by MCP with an agent key	below

Two that are not listed. Gemini Enterprise connects custom MCP servers by OAuth, after an administrator lifts an organisation policy; we have not tried it against this server yet, so it has no card. Wix Symphony documents no way for an outside service to connect today: its connectors are set up by chatting, and approval happens inside Wix. When either changes, it gets a card.

#ChatGPT

As a connector (MCP). Where your plan has developer mode, add a connector with the URL https://immiscible.fly.dev/mcp. ChatGPT registers itself, you sign in to Immiscible and choose the agent it acts as. ChatGPT asks the person to confirm tool calls that change things; Immiscible decides whether the action may happen at all. See the MCP server.

As a custom GPT action. In the GPT editor, under Actions, choose Import from URL and give https://immiscible.fly.dev/openapi.json. Under Authentication, choose API Key, Bearer, and paste the agent key. Tell the GPT, in its instructions, to call requestDecision before any payment, email or change, and to stop on deny.

#Salesforce Agentforce

External Services import OpenAPI 2.0 and a subset of 3.0, not 3.1, so use the 3.0 copy.

In Setup, make a Named Credential for https://immiscible.fly.dev with a custom header x-api-key holding the agent key (through an External Credential, so the key is not visible).
In External Services, add a service from https://immiscible.fly.dev/downloads/immiscible-openapi-3.0.json, using that Named Credential, and select the operations.
In Agent Builder, add the operations as agent actions, and tell the topic to run requestDecision before any consequential step.

#Lindy and Relevance AI

Both connect remote MCP servers over Streamable HTTP, which /mcp speaks. Add a custom MCP server with the URL https://immiscible.fly.dev/mcp and the agent key as a bearer token or the x-api-key header. In Lindy, set the server’s guardrail to Ask for approval if you also want a person in Lindy; in Relevance AI, set the tool to Approval required for the same.

#Waiting for a person

When the answer is approval_required, someone has been asked (in the console, by email, in Slack or Teams). A builder can wait two ways:

Poll getDecision every few seconds until decision changes. Fine for an agent, awkward in a workflow.
Be called back. Send notifyWhenDecided a URL; once the person decides, or the request expires, Immiscible POSTs { "actionId", "decision", "status", "decidedAt" } to it, retrying with backoff for about an hour and a half if it does not answer 2xx. The call never carries the receipt: read getDecision with the key for that. The URL must be https on a public address (http to loopback is allowed outside production, for trying things locally).

n8n’s Wait node is made for the second; Zapier and Make do it with a second Zap or scenario started by a webhook.