API Hub

What is API Hub?

API Hub is a marketplace for APIs and cloud MCP servers, intended for traditional applications and AI agents. Developers can search for interfaces, create keys, view documentation, test calls, and also publish their own APIs on the platform.

The platform also provides a process for converting existing APIs into MCP servers, enabling MCP clients such as Cursor, Claude Desktop, and Continue to use these interfaces as tools. It is a commercial hosting platform, rather than a standalone API service.

Main functions of API Hub

API and MCP markets

The market allows users to search for API and MCP servers by name, label, or keyword. Each item listed there can have its own documentation, limits, and pricing structure.

AI agent tool invocation

API Hub emphasizes structured responses and standardized tool calls, enabling AI agents to acquire, process, and manipulate real-time data. Parameters, permissions, and error handling still need to be verified before use in production environments.

API to MCP server

The publisher can register the basic information of the API as well as the authentication methods, and then use a wizard to define the inputs and outputs for the endpoints. Once configured, it can be deployed as an MCP-compatible service.

Interactive MCP testing

The official website explains that it is possible to use Claude or GPT in an interactive environment to test how the API is invoked by these models. The tests should cover normal parameters, null values, unauthorized access attempts, timeouts, and abnormal return values.

API key management

After enabling the API in the console, users can create separate keys for development, preview, and production environments. The team solution offers key management at the team level.

Unified integration settlement

Paid APIs charge fees using account credits; users can top up their accounts first and then use multiple APIs. The system also offers an automatic top-up option when the balance falls below $5.

Flexible API pricing

Publishers can choose from free, pay-per-request, tiered subscription, or pricing based on tokens and computational resource usage. The price of each API is independent of the API Hub organization plan.

Publication and monetization

Publishing an API is free of charge; the developers are said to be able to receive up to 70% of the revenue generated from API usage. The platform is responsible for tasks such as authentication, billing, distribution, and usage analysis.

Documents and code examples

The platform offers general guidance for getting started, certification information, error handling procedures, rate limiting rules, Webhook details, and publishing instructions. Each actual API also provides information on its endpoints, request responses, and examples on its detailed page.

Use analysis

The Team plan includes advanced analytics, and the publisher’s page provides detailed information on usage figures. The actual metrics available, the retention period, and the export options need to be checked within the account.

Current status of the public catalog

As of August 26, 2026, the lists of APIs and Cloud MCPs available on the API Hub show “No APIs found”. This means that the websites, documentation, and publishing capabilities are visible, but it is not possible to determine from the public list which specific APIs can be purchased or invoked at the moment.

Before use, register first and check whether the directory after logging in is different; also verify at least one real endpoint. Do not consider a platform to be a mature market with a rich range of offerings based solely on the information presented on its home page.

API Hub Usage Guide

1. Register a personal account and access the console.
2. Check whether there are APIs that meet the requirements in the public or logged-in market.
3. Read the API’s documentation, pricing, request limits, and data terms.
4. Add the API to My APIs and create a separate development environment key.
5. Test the minimum request in an interactive environment or locally.
6. Check whether the response fields, error codes, and throttling responses are in accordance with the documentation.
7. Use environment variables or key management services in the application to store credentials.
8. Implement timeout, retry, caching, and quota monitoring.
9. After confirming the quality and cost, create the production environment key.
10. Regularly rotate keys and review account points as well as auto-recharge settings.

Publish API tutorials

1. Prepare a stable REST API, authentication methods, and clear documentation.
2. Submit API information, endpoints, and use cases in the publisher console.
3. Enter the sandbox to carry out authentication, throttling, and integration testing.
4. Add parameters, return fields, error codes, and examples for each endpoint.
5. Choose between free, pay-per-call, subscription, tiered, or usage-based pricing.
6. When an AI agent is needed, configure the MCP input and output structures.
7. It is released after passing the platform review, with continuous monitoring of errors and delays.
8. Notify users in advance during version upgrades and reserve a migration period.

Throttling and error handling

According to the general documentation, each API key is also subject to a total limit of 1,000 requests per minute across the entire platform; moreover, each API has its own specific quota. The plan details page shows the number of requests that can be made by an organization on a daily basis, and both types of limits must be met simultaneously.

• Read the upper limit, remaining quota, and reset time fields from the response.
• When a 429 error is encountered, wait according to the Retry-After value before attempting again.
• Exponential backoff and random jitter are used to prevent a concentration of replay requests.
• Implement appropriate caching for stable responses to reduce repeated calls and associated costs.
• Set call timeouts and maximum retry counts to prevent tasks from hanging indefinitely.
• Allocate quotas separately for development, preview, and production environments.

Which users are it suitable for

• Independent developers who are looking for a unified API interface for their applications.
• Teams that need to configure cloud MCP tools for AI agents.
• Providers who wish to convert existing REST APIs into MCP services.
• API entrepreneurs looking to handle authentication, billing, and distribution.
• Development organizations that require team keys, analytics, and permission management.

Product advantages

• It also has a clear positioning, serving both traditional applications and MCP clients.
• The API is available for free, with various commercial pricing models offered.
• Unified credits can be used across various payment APIs, reducing the need for separate settlements for different accounts.
• It provides a visual workflow from the registration interface to the deployment of the MCP server.
• The organizational packages are designed for individual, team, and corporate use cases.

Usage restrictions and precautions

• The current public catalog does not display API products; the actual available options need to be verified after logging in.
• The domain names listed in the official introductory documentation are example addresses and cannot be used as actual production endpoints.
• The Webhook documentation is clearly marked as upcoming, and it cannot be relied on at present with its current functionality.
• The publisher determines the quality, price, and data processing methods for each API; the platform offerings do not constitute a guarantee of service quality.
• Automatic top-ups can reduce interruptions, but they may also lead to unexpected expenses; therefore, it is necessary to set up alerts for cost changes.
• When creating an MCP tool, it is necessary to restrict the executable actions, especially those related to writing, deleting, and making payments.
• As of the verification date, it has not been confirmed that the API Hub platform is open source, nor has an official code repository been identified.

API Hub prices

As of August 26, 2026, the organizational packages are categorized as Personal, Team, and Enterprise. The cost of these packages, along with the fee for each individual API call, represent two separate costs that must be taken into account when calculating the total expense.

The price is in US dollars; taxes, regions, promotions, and contract terms may vary. It is necessary to refer to the settlement page or the official quote before subscribing. The service is billed per user, and an increase in the number of members will result in a corresponding rise in the monthly fee.

API call fees

Free APIs do not incur any call charges, while paid APIs have costs deducted based on the number of requests, the subscription level, or tokens and processing volume. The specific prices and discounts are specified on each API’s details page.

Publisher fees and royalties

Officials state that an unlimited number of APIs can be made available free of charge, with publishers entitled to a share of up to 70% of the revenue generated from their use. The settlement cycle, refunds, taxes, chargebacks, and the distribution of profits under different plans must be specified in a formal agreement.

Privacy and security

The privacy policy states that the platform collects information related to accounts, usage, technology, and payments; personal data is not sold, but it may be shared with service providers, legal authorities, or parties involved in transactions. Complete card details are handled by payment processors.

API requests may contain customer or business data. Before using third-party APIs, it is necessary to examine separately the data retention, cross-border transfer, training usage, and deletion policies of both API Hub and the specific provider.

Open-source status

API Hub is a commercially hosted marketplace, and as of the date of verification there is no evidence indicating that the entire platform is open source. The GitHub link available on the website or the repository with the same name does not automatically prove that the code belongs to the official team.

MCP is an open protocol, but the fact that MCP is supported does not mean that the hosting services for this protocol are open source. When purchasing or considering self-hosting, it is necessary to examine separately the protocol, the client software, and the platform licenses.

Frequently Asked Questions

Can API Hub be used for free?

The Personal plan costs $0 per month and includes 1 member as well as 500 requests per day; however, paid APIs will still consume credits at their respective rates.

Does API Hub support MCP?

The official website provides APIs for converting to MCP servers, interactive testing tools, as well as information on MCP client compatibility. It is necessary to verify the configuration of the target API and clients before establishing a connection.

What APIs are available in the current market?

As of August 26, 2026, the public catalog shows that no APIs were found. The availability may differ after logging in; it is necessary to verify this in real time within the account before using them.

How much does the Team plan cost?

The Team plan costs $7 per user per month; there is no limit on the number of members. The allowed number of requests is 2,000 per day, and it is possible to request an increased limit.

Is there a fee for using the API?

Publishing APIs is free and there is no limit to the number of them; the authorities state that publishers can receive up to 70% of the revenue generated from API usage.

Is API Hub an open-source platform?

As of August 26, 2026, a fully open-source commercial platform has not been confirmed, nor has any official repository demonstrating the public availability of the platform’s source code been found.