Today I am delighted to share with you our enhanced CustomGPT API Suite — the #1 serverless RAG API on both accuracy and anti-hallucination (in independent benchmarks!)
Rather than building RAG pipelines yourself, this API allows you to quickly build RAG-based solutions with just a few lines of code.
You then get production-ready, best-in-class performance and features (no kidding — we’ve added 964 features/issue fixes in the platform over the last 12 months alone, which says a lot about how the platform works!)
Learn More: Introducing the CustomGPT API – the #1 Serverless RAG API.
Why integrate CustomGPT.ai API?
- Our low-code API allows you to seamlessly integrate powerful AI into your existing products, solutions, and workflows.
- #1 in RAG accuracy and anti-hallucination (in independent benchmarks)
- Production-ready at a fraction of the cost of building in-house. (this is what we do!)
How it works
- We’ve packaged the entire RAG pipeline into an easy-to-use serverless platform.
- No more dealing with vector databases, accuracy, anti-hallucination and the 964 other features/issues needed in a RAG pipeline.
- We’ve made this production-ready and low-cost so that you can immediately deploy in your workflows and applications.
What you can build
- AI / RAG Agents: Build custom agents that can act on your knowledge (like websites, documents, videos, etc)
- AI-Powered Knowledge Discovery: Transform your knowledgebases into smart conversations — allowing you to drive revenue and cut costs.
- Easy Integrations: Integrate RAG-powered AI into your existing products, solutions, and workflows.
What our customers say
“We chose CustomGPT.ai because for us, it had the best spectrum of quality of answers, ease of use, scalability, and most importantly, CustomGPT.ai API capabilities. We have many internal processes that rely on an automated connection to CustomGPT.ai and its API offers great value.” Prof. Dr. Michael Kraus, AI Expert at Dlubal
Get started today
- Get Your API Key — Free trial included.
- Explore the Documentation — Start integrating in minutes.
- Need Help? Book a call with our developer specialist.
👉 Start Building → https://app.customgpt.ai/login
Want to connect with other CustomGPT.ai users and discuss developer API resources? Join our Slack Community to share insights and best practices.
FAQS
Why can’t I just build this with Langchain?
You certainly can, but I would urge you to read these whitepapers we have authored and make a wise choice that is right for your business. u003cbru003eu003cbru003eu003ca href=u0022https://medium.com/operations-research-bit/build-vs-buy-the-ai-implementation-guide-36450424aafcu0022 target=u0022_blanku0022 rel=u0022noreferrer noopeneru0022u003eBuild vs Buy — The AI Implementation Guideu003c/au003eu003cbru003eu003ca href=u0022https://medium.com/towards-artificial-intelligence/build-it-or-buy-it-deployment-options-for-retrieval-augmented-generation-rag-f6d43df8212au0022 target=u0022_blanku0022 rel=u0022noreferrer noopeneru0022u003eBuild It Or Buy It? Generative AI’s Million Dollar Question!u003c/au003eu003cbru003eu003ca href=u0022https://medium.com/@aldendorosario/langchain-is-not-for-production-use-here-is-why-9f1eca6cce80u0022 target=u0022_blanku0022 rel=u0022noreferrer noopeneru0022u003eLangchain is NOT for production use. Here is why ..u003c/au003e
Why wouldn’t I just build a RAG system myself?
With CustomGPT.ai’s RAG API, get up and running in minutes, not months. Benefit from continually optimized retrieval algorithms and state-of-the-art RAG pipeline without the need for in-house AI expertise. Redirect your valuable engineering resources towards developing unique features that set your product apart in the market. u003ca href=u0022https://pub.towardsai.net/build-it-or-buy-it-deployment-options-for-retrieval-augmented-generation-rag-f6d43df8212au0022 target=u0022_blanku0022 rel=u0022noreferrer noopeneru0022u003eRead more about the argument for CustomGPT.ai hereu003c/au003e.
What kind of data do I need to provide to use the CustomGPT.ai RAG API?
You can provide any data that is relevant to your business operations, including files and websites or sitemaps. This includes product information, customer service logs, FAQs, and any other data that will help the AI understand and respond to queries specific to your business.
How can I start testing the RAG API?
We provide a u003ca href=u0022https://docs.customgpt.ai/reference/post_api-v1-projectsu0022 target=u0022_blanku0022 rel=u0022noreferrer noopeneru0022u003esandbox environment via our documentation hubu003c/au003e that allows you to test your API calls in a safe and controlled setting before going live. This environment queries your active projects in the application in real time.
How frequently is the RAG API updated?
We regularly update the API to introduce new features, enhance functionality, and incorporate feedback from our users. This is what has made us #1 in both accuracy AND hallucinations (a rare feat!)u003cbru003eWe ensure that changes are backward compatible to protect existing integrations.
How do I get started with the CustomGPT.ai RAG API?
To start using the CustomGPT.ai API, you first need to sign up for an account on our platform. Once registered, you will be able to generate an API key which you can use to authenticate your API requests. Our documentation provides detailed guidelines on how to make API calls, manage your data, and configure your chatbot settings. u003ca href=u0022https://docs.customgpt.ai/docs/api-quickstart-guideu0022u003eFind out how to get started.u003c/au003e
What are the RAG API rate limits and how are they managed?
Our API rate limits are designed to ensure optimal performance and service reliability for all users. The specific limits depend on your subscription plan. If you need higher limits, you can discuss upgrading your plan with our sales team. You can monitor your API usage through our dashboard, which provides real-time analytics.
How do I handle errors or unexpected responses from the RAG API?
Our u003ca href=u0022https://docs.customgpt.ai/reference/i-api-homepageu0022 target=u0022_blanku0022 rel=u0022noreferrer noopeneru0022u003eAPI documentationu003c/au003e includes a comprehensive list of potential errors, their meanings, and suggested actions to resolve them. If you encounter an unexpected response or an error that persists, please contact our technical support team for immediate assistance.
Can I customize the RAG API responses?
Yes, you can adjust the behavior and style of the chatbot’s replies via our innovative ‘Persona’. Additionally, you can build your own data pipeline via our API to integrate complex logic or additional data sources that influence the agent’s responses.
What data formats does the CustomGPT.ai RAG API support?
Our API supports thousands of file formats for data upload. In addition, unlike other RAG services, our API can ingest entire websites and web data via sitemaps. Responses are returned in JSON format for output. This format ensures compatibility with a wide range of systems and simplifies the integration process. Detailed examples of request and response structures are available in our u003ca href=u0022https://docs.customgpt.ai/reference/i-api-homepageu0022 target=u0022_blanku0022 rel=u0022noreferrer noopeneru0022u003eAPI documentationu003c/au003e.
Is your code open-source?
Our u003ca href=u0022https://github.com/Poll-The-People/customgpt-api-sdksu0022 target=u0022_blanku0022 rel=u0022noreferrer noopeneru0022u003ePython SDKu003c/au003e is open-source, and we also have a separate cookbook repository showing in-depth examples of how to use the SDK. Our application and RAG system are proprietary and closed-source.
Is my data secure with CustomGPT.ai?
Yes. CustomGPT.ai is SOC-2 Type 2 certified. Your data is fully encrypted and files are stored only when you allow them to be. Files are encrypted in transit, and encrypted at rest. We use secure vendors like AWS and Stripe.u003cbru003eu003cbru003eMoreover, your Agents are fully self-contained, which means they do not share ANY data with other Agents, even within your own account.u003cbru003eu003cbru003eBy default, your Agent is private, which means only authorized users can query. We understand the importance of your data security and privacy and are fully committed to ensure that the chatbot and your data are secure, confidential, and private. u003ca href=u0022https://customgpt.ai/security/u0022u003eRead about our security standards.u003c/au003e
What support is available for CustomGPT.ai users?
All plans include email support through our helpdesk. In addition, customers on the u003ca href=u0022https://customgpt.ai/pricing/u0022u003eEnterpriseu003c/au003e plan are assigned a dedicated account manager. Our team can assist with integration, troubleshooting, and any questions you may have about optimizing the use of your chatbot.
How do I integrate CustomGPT.ai with my systems?
Integration is facilitated through our easy-to-use API, which can be connected to your existing systems without significant changes to your infrastructure. Our support team is available to guide you through the integration process step-by-step. u003ca href=u0022https://customgpt.ai/integrations/u0022u003eRead more about our existing integrations.u003c/au003e
How does CustomGPT.ai ensure the accuracy of its agents?
Our agents are continuously tested against industry benchmarks to ensure they provide the most accurate responses. In independent benchmarks, CustomGPT.ai scored #1 in both accuracy and hallucinations (a rare feat!) . We are constantly striving to maintain that leaderboard ranking via proprietary optimizations to our RAG pipeline.
Build smarter with the #1 serverless RAG API
The CustomGPT API gives you serverless, production-ready RAG performance — accurate, scalable, and easy to integrate in minutes.
Trusted by thousands of organizations worldwide
Related Resources
If you’re evaluating production-ready retrieval, this guide expands on the API capabilities discussed above.
- Enterprise RAG API — Explore how CustomGPT.ai supports enterprise-grade retrieval-augmented generation with scalable API access and deployment considerations.