PlainQuery | MCP DB Agent
Let your coding agent answer product and analytics questions against a PostgreSQL database without you hand-writing SQL.
Overview
PlainQuery MCP DB Agent is a Build-phase MCP server that turns plain-English questions into safety-validated PostgreSQL SQL for your coding agent.
What is this MCP server?
- Plain-English questions translated to PostgreSQL SQL by an LLM
- Safety-validated SQL before execution to reduce destructive or risky queries
- Streamable HTTP remote at plainquery.in/mcp with X-API-Key authentication
- Register via POST /api/v1/users/register to obtain an API key
- Version 1.0.1 catalog entry aligned with MCP server.schema.json 2025-12-11
- Catalog version 1.0.1
- Transport: streamable-http remote endpoint
- Auth: required secret header X-API-Key
What problem does it solve?
Solo builders waste time context-switching to SQL clients and worry that agent-generated queries might be unsafe or wrong.
Who is it for?
Indie SaaS builders with PostgreSQL who want guarded natural-language analytics and debugging inside the agent workflow.
Skip if: Teams that need a full BI stack, non-Postgres warehouses, or unsupervised write-heavy automation without human review.
What do I get? / Deliverables
After you register an API key and add the remote MCP endpoint, your agent can fetch trustworthy Postgres answers from conversational prompts.
- Registered remote MCP connection to plainquery.in/mcp/
- Agent-callable plain-English query workflow against Postgres
- Safety-validated SQL execution path instead of raw model SQL
Recommended MCP Servers
Journey fit
Natural-language database access is most often wired during product build when schema, APIs, and agent tooling come together. MCP wiring and remote HTTP transport place this squarely in agent integrations rather than raw schema design.
How it compares
MCP database query bridge with validation, not a schema migration CLI or hosted Postgres replacement.
Common Questions / FAQ
Who is PlainQuery MCP DB Agent for?
Solo and indie builders shipping with agent-first editors who already use PostgreSQL and want conversational, validated read access from the agent.
When should I use PlainQuery MCP DB Agent?
Use it when you are integrating MCP tooling during build, or when you need quick English-to-SQL lookups for analytics and incident triage with safety checks.
How do I add PlainQuery MCP DB Agent to my agent?
Register at the PlainQuery API (POST /api/v1/users/register), set X-API-Key on the streamable-http remote https://plainquery.in/mcp/, and register the server in Claude Code, Cursor, or another MCP-capable client.