Memory API

Add long-term memory to your LLM stack

A simple API for storing and retrieving structured memory. Give your product the context it keeps losing.

Start building

Important distinction

This is not a vector database

Vector search gives you similarity. Maindex gives you memory.

Structured memory — not flat embeddings
Linked concepts — not isolated chunks
Persistent knowledge — not disposable context

Start building with memory

Why this matters

Without memory, your product resets every session

Users lose context between conversations
Quality degrades without continuity
You rebuild the same prompts over and over

Try the API

POST /v1/memories
{
  "headline": "User prefers annual pricing",
  "body": "Discussed in onboarding call. Strong preference for annual billing with upfront discount.",
  "tags": ["pricing", "preferences", "onboarding"]
}

Stored, tagged, linked, and queryable. That's it.

What you get

Structured storage

Memories with tags, links, and categories — not raw embeddings.

Semantic + relational recall

Query by meaning and follow connections between concepts.

REST API + MCP

REST for your backend. MCP for direct agent integration. Use both.

Start building with memory

14-day free trial included. Add persistent context to your product today.

Start building