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  4. Supabase Vector API
published AI Powered

Supabase Vector API

The Supabase Vector API provides a free tool for vector similarity searches within Postgres databases, integrating advanced features for AI applications.

Developed by Supabase

Live API
99.90%Uptime
150msLatency
42kStars
API KeyAuth
NoCredit Card
RESTStyle
v1Version

Reference

API Endpoints

Endpoints

Available routes, request structures, and code examples.

Generates vector embeddings from text

Endpoint URL
https://YOUR_PROJECT.supabase.co/vectors
Code Example
curl -X POST 'https://YOUR_PROJECT.supabase.co/vectors' \
  -H 'Authorization: Bearer YOUR_API_KEY'
Request Payload
{
  "text": "The capital of France is Paris",
  "model": "text-embedding-ada-002"
}
Expected Response
{
  "model": "text-embedding-ada-002",
  "usage": {
    "prompt_tokens": 7
  },
  "embedding": [
    0.1,
    -0.2,
    0.3
  ]
}
Version:v1
Limit:1000 vectors/minute

Integration

Quick Start

cURL ExampleREST
curl -X GET "https://YOUR_PROJECT.supabase.co/vectors/search"

Docs

Technical Documentation

What this API does

The Supabase Vector API is a tool that enables developers to perform vector similarity searches directly within PostgreSQL databases powered by Supabase. It features pgvector for managing high-dimensional vector embeddings, which is essential for AI and machine learning applications. The API supports efficient k-nearest neighbor searches with multiple distance metrics such as cosine and Euclidean distances, making it suitable for semantic search and recommendation systems.

How it works

To use the API, developers send RESTful HTTP requests to specific endpoints designed for vector operations. These include batch inserting vectors, searching for nearest embeddings based on various distance metrics, and retrieving vector details by ID. The API returns results in JSON format, facilitating integration with modern programming languages and frameworks.

Authentication

Authentication is managed via Supabase's built-in services. Developers must set up an account and configure authentication to utilize the API within their projects, ensuring secure access to data and services.

Example usage

  • /vectors - Batch inserts vectors into the database.
  • /search - Retrieves nearest vectors based on input embeddings.
  • /vectors/{id} - Fetches details of a specific vector by ID.

Limits

Ideal use cases

  • Building AI-driven recommendation systems.
  • Implementing semantic search functionalities in applications.
  • Creating personalized user experiences through content relevance.
  • Integrating advanced data search capabilities into existing systems.

Examples

Real-World Applications

  • Implementing semantic search features in applications
  • Creating recommendation systems based on user behavior
  • Enhancing chatbots with context-aware response generation
  • Building AI tools that require embedding-based queries

Evaluation

Advantages & Limitations

Advantages
  • ✓ Integrates seamlessly with Supabase backend services
  • ✓ Supports multiple distance metrics for vector search
  • ✓ Free tier available with no credit card required
  • ✓ Real-time database operations and filtering capabilities
Limitations
  • ✗ Limited official SDKs for some programming languages
  • ✗ Rate limits may impact very high volume applications
  • ✗ Relies on Supabase hosting, limiting multi-cloud flexibility
  • ✗ Authentication details and documentation could be clearer

Support

Frequently Asked Questions

Important Notice

Verify Before You Decide

Last verified · Apr 30, 2026

The details on this page — including pricing, features, and availability — are based on our last review and may not reflect the provider's current offering. Providers update their products frequently, sometimes without prior notice.

What may have changed

Pricing Plans
Features & Limits
Availability
Terms & Policies

Always visit the official provider website to confirm the latest pricing, terms, and feature availability before subscribing or integrating.

Check official site

External Resources

Documentation Official Website Pricing Details Postman Collection

API Specifications

v1
Pricing Model
Pay-as-you-go with usage-based billing
Credit Card
Not Required
Response Formats
JSON
Supported Languages
5 Languages
SDK Support
JavaScript, Python
Rate Limit

1000 requests per minute

Time to Hello World

Under 15 minutes

Free Tier

2 projects, 500MB database storage, 500,000 vector operations per month, no credit card required

Best For

Developers building AI-powered applications requiring vector similarity search with real-time backend support

Not Ideal For

Applications requiring extremely high throughput vector processing beyond free or paid limits, or requiring multi-cloud deployments

Tags

#postgres#pgvector#supabase#firebase-alternative#Rag#embeddings#ai#open-source

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