ContextsBase
Single-source context infrastructure over MCP for Claude Code, Cursor & MCP agents.
ContextsBase is an agent-native backlog where features, business rules, the data model, and Given/When/Then test cases are written once and pulled by any MCP client (Claude Code, Cursor, Copilot, Windsurf) in one call. Agents claim iteration steps in order, write tests that assert the business rule, and record what they built against each spec. It does not supply the agent — it supplies what your agent builds from.
What is ContextsBase?
ContextsBase is an agent-native project workspace and context infrastructure platform for AI coding agents. It holds a product's features, business rules, data model, Given/When/Then test cases, and design tokens in one place and serves them to any MCP-capable agent (Claude Code, Cursor, Copilot, Windsurf, or any MCP client) through a single HTTP MCP endpoint, replacing re-pasted chat prompts with a machine-readable backlog that agents claim, build, and test in order.
Key features
- Single MCP endpoint (https://app.contextsbase.com/api/v1/mcp) configured with one .mcp.json block and a bearer token
- Structured workspace entities: features/specs, business rules, data model entities and fields, and test cases
- Given/When/Then test cases that agents turn into real executable tests asserting business rules
- Autonomous iterations: ordered feature queues that agents claim, build, and test one step at a time so two agents never build the same thing
- Design tokens / theme designer so agents build on-brand from published tokens
- Page editor: click an element on your live site, change words or styling, and the agent applies it to the real code
- Agent-agnostic by design: ContextsBase does not supply the agent; Claude Code, Cursor, Copilot, Windsurf, or any MCP client connects
- Web guides for Cursor/Claude Code MCP setup and project-context patterns
Who it's for
- Teams using Claude Code or Cursor who paste the same spec document into every new session
- Teams whose agents invent schema fields or miss business rules because the product truth lives in human wikis
- Multi-agent development where several agents need an ordered, claimable backlog to avoid duplicate work
- Backend, mobile, and systems projects (not only web) that want one source of truth agents read from and report back to
- QA that wants generated tests to assert business rules instead of clicking buttons
When not to use it
If you do not run an MCP-capable coding agent, or your project fits in a single prompt, ContextsBase adds a sync step without paying off. The free plan covers only one project and the $5/mo premium tier is announced but not yet live, so multi-project teams cannot upgrade today.
FAQ
What is ContextsBase?
ContextsBase is a backlog-and-context platform for AI coding agents: features, business rules, data models, and test cases are written once and served to agents over MCP, so they build against the real product spec instead of re-pasted prompts.
Which coding agents work with ContextsBase?
Any MCP client. The site lists Claude Code, Cursor, Copilot, and Windsurf, and shows a single .mcp.json HTTP config block with a bearer token. ContextsBase does not provide the agent itself.
How does ContextsBase connect to my agent?
You add one MCP server entry (https://app.contextsbase.com/api/v1/mcp) with an Authorization bearer token to your agent's MCP config; the agent then pulls specs, rules, and test cases in one call and records what it built against each feature.
Is ContextsBase free?
There is a free-forever plan with 1 project, 100 features, and 3 members. A $5/month premium plan with unlimited projects, features, and members is listed as coming soon.
How do tests work in ContextsBase?
Test cases are written as Given/When/Then business rules. Agents convert them into real executable tests, so the suite asserts the business rule (e.g. a 15-minute link expiry) rather than just UI behavior.
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