API.market vs Axway Amplify Engage

API.market is a marketplace for discovering, testing, integrating, listing, and monetizing APIs and AI models. Its catalog advertises more than 590 APIs and AI models, along with more than 3,670 API tools accessible through one MCP connection. Buyers can try APIs in a Playground without setup or SDKs and use auto-generated apps to interact with them. The service describes unified access through one API key, usage-based billing, and real-time metrics. Sellers can import an OpenAPI specification, set subscription, pay-per-use, or tiered pricing, and generate product documentation, a test console, and an MCP endpoint. Their tools include pricing and subscription management, usage metering, rate limits, invoicing, versioning, and revenue monitoring. API.market proxies requests and handles authentication, billing, rate limiting, and analytics. Free seller listings have no listing or monthly platform fee; sellers keep 80% of sales, with a platform fee up to 20%, renegotiable above $2,500 MRR. Enterprise AI model licensing starts at $599 per month, plus a one-time $299 deployment and integration fee.

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