Summary

Relational data with foreign keys that line up, which is the part hand-rolled fixtures always get wrong.

Asking for fifty users and two hundred orders linked to them is one call, and the seed makes the result repeatable, so a failing test can be reproduced rather than regenerated. detect_schema is the shortcut worth knowing: point it at a CREATE TABLE from an existing migration and you skip defining the schema twice.

What it is

A client for MockHero's test-data service. It generates related tables with working foreign keys from a schema you give it, a template, or a plain-English description, and can read an existing schema to start from.

What you get

Relational test data with foreign keys honoured, in JSON, CSV or SQL for the dialect you name, and a seed for repeatable output — generate_test_data
156 field types across identity, location, financial, temporal, technical, content, HR, ecommerce, healthcare and edge-case categories, listed with their parameters — list_field_types
22 locales, so names and addresses match the market you are testing for
Pre-built schemas for common shapes — ecommerce, blog, saas, social — with a scale multiplier instead of a table definition — generate_from_template, list_templates
A SQL CREATE TABLE statement or a sample JSON record converted into a schema ready to generate from — detect_schema
A cost estimate before generating, using your actual daily usage when a key is configured — estimate_agent_usage
A purchase flow that runs entirely in tools: a checkout URL created for a billing email, its status polled, and the API key claimed once it is paid — create_agent_checkout, check_agent_checkout_status, claim_agent_api_key

Requirements

It runs with or without a key. Without one, generation from explicit schemas and small templates is free up to 100 records per request, and schema detection, field-type listing, templates and estimates are always free. MOCKHERO_API_KEY unlocks plain-English prompt generation and larger requests; the agent plan gives 500 free records a day, then $0.001 per 100 records, billed through Polar as merchant of record. Run npx @mockherodev/mcp-server over stdio, or connect a Streamable HTTP client straight to https://mockhero.dev/mcp/agent with the key as a bearer token. The claimed key is shown exactly once — store it, then restart the server with it set.

Setup effort

One command plus a key — npx @mockherodev/mcp-server, then supply credentials