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API Nodes are ComfyUI’s new way of calling closed-source models through API requests, providing ComfyUI users with access to external state-of-the-art AI models without complex API key setup.

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What are API Nodes?

API Nodes are a set of special nodes that connect to external API services, allowing you to use closed-source or third-party hosted AI models directly in your ComfyUI workflows. These nodes are designed to seamlessly integrate the capabilities of external models while maintaining the open-source nature of ComfyUI’s core. Currently supported models include:
  • Black Forest Labs: Flux 1.1[pro] Ultra, Flux .1[pro], Flux .1 Kontext Pro, Flux .1 Kontext Max, Flux.1 Canny Control, Flux.1 Depth Control, Flux.1 Expand, Flux.1 Fill
  • Google: Veo2, Veo 3.0, Gemini 2.5 Pro, Gemini 2.5 Flash, Gemini Image
  • Ideogram: V3, V2, V1
  • Kling: 2.0, 1.6, 1.5, v1, v2-1, v2-1-master, v2-maser & Various Effects
  • Luma: Photon, Ray2, Ray1.6, Ray-flash-2, Photo-flash-1
  • MiniMax: Text-to-Video, Image-to-Video, Hailuo-02, T2V-01, I2V-01
  • Moonvalley: Image-to-Video, Text-to-Video, Video-to-Video
  • OpenAI: o1, o1-pro, o3, o4-mini, gpt-4o, gpt-4.1, gpt-4.1-mini, gpt-4.1-nano, gpt-5, gpt-5-mini, gpt-5-nano, DALL·E 2, DALL·E 3, GPT-Image-1
  • PixVerse: V4 & Effects
  • Pika: 2.2
  • Recraft: V3, V2 & Various Tools
  • Rodin: 3D Generation
  • Runway: Text-to-Image, First-Last-Frame to Video, Image to Video (Gen3a Turbo, Gen4 Turbo)
  • Stability AI: Stable Image Ultra, Stable Diffusion 3.5 Large, Stable Diffusion 3.5 Medium, Image Upscale
  • Tripo: v1-4, v2.0, v2.5
  • Vidu: Image-to-Video, Reference Video, Start-End to Video, Text-to-Video

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Prerequisites for Using API Nodes

To use API Nodes, the following requirements must be met:

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1. ComfyUI Version Requirements

Please update your ComfyUI to the latest version, as we may add more API support in the future, and corresponding nodes will be updated, so please keep your ComfyUI up to date.
Please note the distinction between nightly and release versions. We recommend using the nightly version (which is the latest code commit), as the release version may not be updated in a timely manner. This refers to the development version and the stable version, and since we are still rapidly iterating, this document may not be updated promptly, so please pay attention to the version differences.

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2. Account and Credits Requirements

You need to be logged into your ComfyUI with a Comfy account and have a credit balance of credits greater than 0. Log in via Settings -> User: ComfyUI User Interface Go to Settings -> Credits to purchase credits Credits Interface Please refer to the corresponding documentation for account and credits to ensure this requirement:
  • Comfy account: Find the User section in the settings menu to log in.
  • Credits: After logging in, the settings interface will show a credits menu where you can purchase credits. We use a prepaid system, so there will be no unexpected charges.

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3. Network Environment Requirements

API access requires that your current requests are based on a secure network environment. The current requirements for API access are as follows:
  • The local network only allows access from 127.0.0.1 or localhost, and you can directly use the login function.
  • If you are accessing from a local area network or a website that is not on the whitelist, please log in with an API Key. Please refer to Log in with an API Key.
  • You should be able to access our API service normally (in some regions, you may need to use a proxy service).
  • Access should be carried out in an https environment to ensure the security of the requests.
Accessing in an insecure context poses significant risks, which may result in the following consequences:
  1. Authentication may be stolen, leading to the leakage of your account information.
  2. Your account may be maliciously used, resulting in financial losses.
Even if we open this restriction in the future, we strongly advise against accessing API services through insecure network requests due to the high risks involved.

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4. Using the Corresponding Nodes

Add to Workflow: Add the API node to your workflow just like you would with other nodes. Run: Set the parameters and then run the workflow. API Nodes

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Log in with ComfyUI Account API Key on non-whitelisted websites

Currently, we have set up a whitelist to restrict the websites where you can log in to your ComfyUI account. If you need to log in to your ComfyUI account on some non-whitelisted websites, please refer to the account management section to learn how to log in using an API Key. In this case, the corresponding website does not need to be on our whitelist.

Account Management

Learn how to log in with ComfyUI Account API Key
 Select Comfy API Key Login

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Use ComfyUI Account API Key Integration to call paid model API nodes

Currently, we support accessing our services through ComfyUI API Key Integration to call paid model API nodes. Please refer to the API Key Integration section to learn how to use API Key Integration to call paid model API nodes.
Important: The API key discussed here is your ComfyUI Account API Key (used for accessing paid API nodes in workflows). This is NOT the same as the Registry Publishing API Key used by developers to publish custom nodes to the registry. If you’re looking to publish custom nodes, see Publishing Nodes.

API Key Integration

Please refer to the API Key Integration section to learn how to use API Key Integration to call paid model API nodes

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Advantages of API Nodes

API Nodes provide several important advantages for ComfyUI users:
  • Access to closed-source models: Use state-of-the-art AI models without having to deploy them yourself
  • Seamless integration: API nodes are fully compatible with other ComfyUI nodes and can be combined to create complex workflows
  • Simplified experience: No need to manage API keys or handle complex API requests
  • Controlled costs: The prepaid system ensures you have complete control over your spending with no unexpected charges

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Pricing

API Node Pricing

Please refer to the pricing page for the corresponding API pricing

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About Open Source and Opt-in

It’s important to note that API Nodes are completely optional. ComfyUI will always remain fully open-source and free for local users. API nodes are designed as an “opt-in” feature, providing convenience for those who want access to external SOTA (state-of-the-art) models.

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Use Cases

A powerful application of API Nodes is combining the output of external models with local nodes. For example:
  • Using GPT-Image-1 to generate a base image, then transforming it into video with a local wan node
  • Combining externally generated images with local upscaling or style transfer nodes
  • Creating hybrid workflows that leverage the advantages of both closed-source and open-source models
This flexibility makes ComfyUI a truly universal generative AI interface, integrating various AI capabilities into a unified workflow, opening up more possibilities

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FAQs

Please update your ComfyUI to the latest version (the latest commit or the latest desktop version). We may add more API support in the future, and the corresponding nodes will be updated, so please keep your ComfyUI up to date.
Please note that you need to distinguish between the nightly version and the release version. In some cases, the latest release version may not be updated in time compared to the nightly version. Since we are still iterating quickly, please ensure you are using the latest version when you cannot find the corresponding node.
API access requires that your current request is based on a secure network environment. The current requirements for API access are as follows:
  • The local network only allows access from 127.0.0.1 or localhost, which may mean that you cannot use the API Nodes in a ComfyUI service started with the --listen parameter in a LAN environment.
  • Able to access our API service normally (a proxy service may be required in some regions).
  • Your account does not have enough credits.
  • Currently, only 127.0.0.1 or localhost access is supported.
  • Ensure your account has enough credits.
API Nodes require credits for API calls to closed-source models, so they do not support free usage.
Please refer to the following documentation:
  1. Comfy Account: Find the User section in the settings menu to log in.
  2. Credits: After logging in, the settings interface will show the credits menu. You can purchase credits in Settings → Credits. We use a prepaid system, so there will be no unexpected charges.
  3. Complete the payment through Stripe.
  4. Check if the credits have been updated. If not, try restarting or refreshing the page.
Currently, we do not support refunds for credits. If you believe there is an error resulting in unused balance due to technical issues, please contact support.
Credits cannot go negative, so please ensure you have enough credits before making the corresponding API calls.
Please visit the Credits menu after logging in to check the corresponding credits.
Currently, the API Nodes are still in the testing phase and do not support this feature yet, but we have considered adding it.
No, your credits do not expire.
No, your credits cannot be transferred to other users and are limited to the currently logged-in account, but we do not restrict the number of devices that can log in.
We do not limit the number of devices that can log in; you can use your account anywhere you want.
Email a request to support@comfy.org and we will delete your information