---
title: "Trigger an external-form block in a flow"
method: POST
path: "/flows/{flowId}/external-forms/{blockId}"
tags: ["Flows"]
---

# Trigger an external-form block in a flow

`POST /flows/{flowId}/external-forms/{blockId}`

## Request

- Base URL: `https://api.loopify.com` (the document declares no server; this is the origin it was published from)
- URL: `https://api.loopify.com/flows/{flowId}/external-forms/{blockId}`
- Auth: none declared

Use this endpoint to trigger an external form block in a flow.  

Call this endpoint with the same payload you used when mapping the block (must be done before calling this)

## Path parameters

- `flowId` string, required
- `blockId` string, required

## Request body

- unknown

## Response `200`

Success

## Other responses

- `400`: 0: Json body is invalid 1: Flow could not be found 2: Flow-block is missing a mapping 3: Could not validate payload 4: License issue

---

[API](https://skmtc.dev/loopify/apis/web-api-loopify.md) · [All operations](https://skmtc.dev/loopify/apis/web-api-loopify/llms.txt) · [OpenAPI document](https://skmtc.dev/loopify/apis/web-api-loopify/revisions/68c51b11a24b?raw)