API.market vs api0.app

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.

api0.app combines a no-code API builder with a marketplace for publishing and finding APIs. Its visual builder turns tables or defined fields into typed REST endpoints with request validation and pagination. Supported sources include Postgres, MySQL, SQLite, MongoDB, Google Sheets, CSV uploads and existing REST APIs. Each endpoint has an interactive reference and a downloadable OpenAPI 3.1 specification that updates when the schema changes. Generated APIs are private by default, and marketplace publication is optional. Access features include scoped API keys, secret rotation and rate limits that vary by plan. Publishers can charge per request, offer monthly plans or provide a free tier; the platform meters requests, bills buyers and pays builders monthly after a marketplace fee. The dashboard reports request volume, error rate, p95 latency and revenue by endpoint, including customer-level details. The Free plan costs nothing and includes up to 2 live endpoints and 10,000 requests per month.