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fastapi.online SQL Generator
x402
fastapi.online SQL Generator is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.002/call, status down (last checked 2026-09-15).
Generates SQL queries from a natural language description, optional schema, and target SQL dialect
Price / call$0.002
Success—
StatusDown
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 generated SQL query string tailored to the provided database schema and dialect, based on the natural language description. The output is ready-to-use SQL code matching the specified SQL dialect.
Example use cases
Ad-hoc analytics query generation
“I have a MySQL database with tables 'sales(id, product_id, quantity, sale_date)' and 'products(id, name, category, price)'. Write me a SQL query to get the top 5 best-selling product categories by total revenue this year.”
Developer bootstrapping SQL for new schema
“Here's my schema: 'employees(id, name, department_id, salary), departments(id, name, manager_id)'. Generate a PostgreSQL query that returns each department name along with the average salary and the name of its manager.”
Non-technical user querying their own data
“My database is SQLite with a table called 'inventory(item_id, item_name, quantity, reorder_level)'. Write a SQL query that finds all items where the quantity is below the reorder level, sorted by how critically low they are.”
Technical details
Endpoint
POSThttps://api.fastapi.online/sql-generateWhen to prefer
Choose this endpoint when you need a quick, pay-per-call SQL generation without signing up for a managed NL-to-SQL service. It supports dialect-specific generation (e.g. PostgreSQL, MySQL, SQLite) and schema-aware query construction. Ideal for agents or pipelines that need on-demand SQL code generation without managing API keys or subscriptions.
Side effects
- Missing or empty description field returns validation error
- Schema string exceeds 4000 character limit causes rejection
- Unsupported or misspelled dialect may produce generic or incorrect SQL
- Ambiguous description may yield a plausible but incorrect query
- Very complex multi-step queries may be incomplete or simplified
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| schema | string | |
| dialect | string | |
| description | string |
Tags
x402
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