Mockline
Instant Mock APIs from OpenAPI Specs
Mockline launched on March 31, 2026 with 5 votes, #1,928 of 23,380 launches that month and more than 75% of that year's launches.
What it does
Instant mock APIs from OpenAPI specs. Frontend and QA teams ship faster with isolated containers and live URLs—no backend blockers.
Mockline is an open-source PaaS that provisions isolated, Docker-powered mock API servers from OpenAPI specifications. Upload a spec, get a live URL in seconds.
Upload any OpenAPI spec and get an isolated mock server with a public URL—shareable with your team. No infrastructure to manage. No config files. Upload spec, provision container, share remote URL. Drag in any OpenAPI 3.x file. Mockline validates it instantly and parses every endpoint, schema, and response type. A Docker container with your spec baked in starts in under 60 seconds. Isolated. Reproducible. No shared state. Send the remote URL to your team. Point your CI pipeline at it. Run contract tests whenever your real API is ready. Every spec gets its own Docker container. No cross-contamination, no shared infrastructure. Point the runner at your staging API and compare every response…from mockline.xyz
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