misata

Generate relational test data that satisfies what you declared, then get back a check that it did.

CommunityOnlineNo sign-inGlobalFreeCan modify data

What it can do

  • Generate From Story: Generate a complete relational synthetic dataset from a plain-English description. Misata's deterministic engine guarantees 100% foreign-key integrity and exact declared outcome c
  • Generate From Schema: Generate synthetic data from a Misata dict schema. No API key required. Returns data for every table with an FK integrity proof.
  • Design Schema: Design a relational schema from a plain-English description without generating data. Returns a Misata schema dict ready to pass to generate_from_schema. Requires a Groq, OpenAI, or Anth

What data it sees

Do you need an account

No: the server works without sign-in

Generate relational test data that satisfies what you declared, then get back a check that it did.

Describe the dataset in a sentence or hand over a schema. Misata builds every table in one pass, so foreign keys resolve, parent totals equal what their children actually sum to, and a column declared as qty * price holds on every row. Same schema and seed, same data, so a fixture you liked yesterday is still there tomorrow.

The division of labour is the point. Your agent designs the schema, which is what agents are genuinely good at. The engine handles the arithmetic, which is where generated data quietly goes wrong: line items that look perfect and don't add up, a summary figure that disagrees with the rows underneath it. generate_from_schema needs no API key and returns an integrity proof for every relationship.

Seven tools, including one that fills a real database from its own schema, parents before children, every key verified afterwards. It plans first and writes nothing until you confirm.

MIT licensed. No training data, no copy of production, nothing to anonymise.

How to connect

How to connect misata to Claude

The server address to paste into Claude settings:

https://misata.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect misata to ChatGPT

The server address to paste into ChatGPT settings:

https://misata.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect misata to Cursor

The server address to paste into Cursor settings:

https://misata.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (3)

Raw names from tools/list. Only developers need these.

generate_from_storyGenerate a complete relational synthetic dataset from a plain-English description. Misata's deterministic engine guarantees 100% foreign-key integrity and exact declared outcome curves. Requires a Groq, OpenAI, or Anthropic API key (configure in Smithery).
generate_from_schemaGenerate synthetic data from a Misata dict schema. No API key required. Returns data for every table with an FK integrity proof.
design_schemaDesign a relational schema from a plain-English description without generating data. Returns a Misata schema dict ready to pass to generate_from_schema. Requires a Groq, OpenAI, or Anthropic API key.