The platform
One platform for your internal APIs.
spec0 turns your OpenAPI specs into a live, governed source of truth — then makes it useful everywhere: in your agents over MCP, as hosted mocks, behind governance gates, and in spec-aware AI workflows. Push once; every surface stays current.
How it fits together
One source of truth. Every surface downstream.
Specs flow in from wherever you work. The registry indexes them once — then the MCP layer, mocks, governance, and AI workflows all read from that single current source.
Push from anywhere
The core
API Registry — indexed, versioned, governed
operations · components · metadata · ownership
MCP Layer
live to agents
Mock Servers
schema-accurate
Governance
breaking-change gates
AI Workflows
spec-aware automation
Consumed by
Five products, one platform
Explore each piece.
MCP Layer
Give Cursor, Claude Code, and every agent on your team live access to your internal API catalog over MCP. They query the current spec — never a stale doc or a 150k-token paste — in around 300 tokens.
ExploreAPI Registry
Push once and your OpenAPI specs land in a live, semantically-indexed registry. Every team, agent, and tool reads the same current source of truth — no more hunting through repos and wikis for the right spec.
ExploreMock Servers
Every API you push gets a hosted mock automatically, serving realistic responses straight from your schema. Share one URL with your team and consumers, and wire it into CI for contract tests — zero infrastructure to run.
ExploreGovernance & Quality
Spec0 diffs every change against the published spec, flags backward-incompatible changes, and runs lint and quality checks in CI — so a breaking change is caught in the PR that introduces it, not in a consumer's incident channel.
ExploreAI Workflows
With your catalog live in the MCP layer, agents do more than look things up — they reason across your APIs, draft integrations, and run multi-step workflows grounded in the real, current contracts.
Explore