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fastapi.online — AI Database Schema Generator
x402
fastapi.online — AI Database Schema Generator is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Generates a database schema (Prisma, Postgres SQL, or Mongoose) from a plain-English description of a data model
Price / call$0.005
Success—
StatusUnknown
How this service works
Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding & crypto utilities, date/time calculators, geo/coordinate math, math & finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.
Output
Returns a ready-to-use database schema in the requested format (Prisma schema file syntax, raw Postgres DDL SQL, or Mongoose model definitions), generated from your plain-English data model description. The output includes entity definitions, fields with types, relationships, and constraints appropriate to the chosen database/ORM target.
Example use cases
Bootstrap e-commerce data model
“Generate a Prisma schema for an e-commerce platform with products, categories, customers, orders, order items, and payments — products have variants, orders link to customers and contain multiple items, and payments track status and method.”
Scaffold Mongoose schema for social app
“Design a Mongoose schema for a social media app with users, posts, comments, likes, and followers — users can follow each other, posts can have multiple comments and likes, and each entity should have timestamps.”
Generate Postgres tables for task manager
“Create a Postgres schema for a project management tool with workspaces, projects, tasks, subtasks, tags, and team members — tasks have assignees, due dates, priority levels, and can be tagged with multiple labels.”
Technical details
Endpoint
POSThttps://api.fastapi.online/generate-schemaWhen to prefer
Choose this endpoint when you need a quick, AI-generated database schema scaffold in Prisma, Postgres SQL, or Mongoose format from a natural language description. Ideal for rapid prototyping, bootstrapping new projects, or when a developer wants a starting point without manually writing boilerplate schema code. Best when you want pay-per-call access with no signup required and crypto payment support via x402.
Side effects
- Description too vague or too short (minLength 2 enforced) — returns error if description is under 2 characters
- Invalid db value (not prisma, postgres, or mongoose) — may default to prisma or return validation error
- Description exceeds 2000 character limit — returns 400 error
- Payment not attached or insufficient — returns 402 Payment Required
- Ambiguous or contradictory data model description may produce incomplete or incorrect schema
- Network timeout on complex schemas
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| db | string | prisma | postgres | mongoose (default prisma) |
| description | string | the data model to design |
Tags
x402
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