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57 lines
2.2 KiB
Plaintext
57 lines
2.2 KiB
Plaintext
## Prerequisites
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Before using the API, you need:
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* [Install and start Langflow](/get-started-installation) with the developer API enabled
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The Workflows API endpoints require the `developer_api_enabled` setting to be enabled. If this setting is disabled, these endpoints will return a 404 Not Found error.
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To enable the developer API endpoint, do the following:
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1. In the Langflow `.env` file, set the environment variable to `true`:
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```
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LANGFLOW_DEVELOPER_API_ENABLED=true
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```
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2. Start your Langflow server with the `.env` file enabled:
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```
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uv run langflow run --env-file .env
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```
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For more information about configuring environment variables, see [Environment variables](/environment-variables).
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* [Create a Langflow API key](/api-keys-and-authentication)
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* [Create a flow](/concepts-flows) that you want to execute
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* [Get the flow ID](/concepts-publish#api-access) or endpoint name of the flow you want to execute
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### Set environment variables
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All code examples in this documentation assume you have set the following environment variables:
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**Python:**
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```python
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import os
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LANGFLOW_SERVER_URL = os.getenv("LANGFLOW_SERVER_URL")
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LANGFLOW_API_KEY = os.getenv("LANGFLOW_API_KEY")
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```
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**TypeScript/JavaScript:**
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```typescript
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const LANGFLOW_SERVER_URL = process.env.LANGFLOW_SERVER_URL;
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const LANGFLOW_API_KEY = process.env.LANGFLOW_API_KEY;
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```
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Set these environment variables before running the examples, or replace the variable references in the code examples with your actual Langflow server URL and API key.
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The default `LANGFLOW_SERVER_URL` for a local Langflow deployment is `http://localhost:7860`.
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For remote deployments, the domain is set by your hosting service, such as `https://UUID.ngrok.app`.
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### Authentication and headers
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All Workflows API requests require authentication using a Langflow API key. The API key is passed in the `x-api-key` header.
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For more information, see [Create a Langflow API key](/api-keys-and-authentication).
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| Header | Description | Example |
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|--------|-------------|---------|
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| `Content-Type` | Specifies the JSON format. | `application/json` |
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| `x-api-key` | Your Langflow API key. | `sk-...` |
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| `accept` | Optional. Specifies the response format. | `application/json` | |