Marqo (marqo)

Marqo is an open-source, multimodal vector search engine that lets developers index text and images, generate embeddings on the fly, and run tensor, lexical, and hybrid search through a single REST API. Built on Vespa for storage and retrieval and FastAPI for the HTTP surface, Marqo bundles model inference (Sentence Transformers, OpenCLIP, ONNX) inside the engine so a single docker run produces a working semantic search stack. The Apache 2.0 open-source engine has been marked deprecated by the maintainers as Marqo pivots to a hosted ecommerce search product, but the project remains widely forked, downloaded, and self-hosted, with active sibling repositories for the Python client, Terraform provider, InstantSearch client, ecommerce embedding models, and Generalised Contrastive Learning research.

APIs.yml: apis.yml

Run: Capabilities Using Naftiko

Type

• x-type: opensource
• License: Apache 2.0
• Core Repo: github.com/marqo-ai/marqo (5,000+ stars, marked deprecated, still public and Apache 2.0)

Tags

• Vector Database
• Vector Search
• Multimodal
• Semantic Search
• Embeddings
• AI
• Machine Learning
• Open Source
• Ecommerce Search

Timestamps

• Created: 2026-05-08
• Modified: 2026-05-25

APIs

Marqo REST API

The Marqo REST API is the HTTP surface exposed by the open-source engine (default http://localhost:8882). It provides index lifecycle management, document add/update/get/delete, lexical/tensor/hybrid search, recommendations, embedding generation, model lifecycle, telemetry, and health endpoints. The same surface is served by Marqo Cloud at https://api.marqo.ai, and the live OpenAPI schema is published by the running engine at /openapi.json with Swagger UI at /docs.

Human URL: https://docs.marqo.ai/

Base URL: http://localhost:8882 (open source) / https://api.marqo.ai (cloud)

Properties

• Documentation
• OpenAPI
• API Reference
• Getting Started
• Source Code
• Deprecation Notice

Common Properties

• Website
• GitHub Organization
• GitHub Repository
• LinkedIn
• Documentation
• License (Apache 2.0)
• Blog
• Pricing (hosted product)
• Plans
• Rate Limits
• FinOps

SDKs, Tools, and Models

• py-marqo — Official Python client. github.com/marqo-ai/py-marqo
• marqo-instantsearch-client — TypeScript client compatible with InstantSearch.js. github.com/marqo-ai/marqo-instantsearch-client
• terraform-provider-marqo — Terraform provider for Marqo Cloud indexes. github.com/marqo-ai/terraform-provider-marqo
• marqo-base — Dockerfile and dependencies for the Marqo base image. github.com/marqo-ai/marqo-base
• ingrain_server — Wrapper for serving Sentence Transformer and OpenCLIP models via Triton. github.com/marqo-ai/ingrain_server
• marqo-ecommerce-embeddings — Open-weight ecommerce embedding models. github.com/marqo-ai/marqo-ecommerce-embeddings
• marqo-FashionCLIP — Open-weight CLIP / SigLIP models finetuned for the fashion domain. github.com/marqo-ai/marqo-FashionCLIP
• GCL — Generalised Contrastive Learning research framework + Google Shopping benchmark. github.com/marqo-ai/GCL
• local-image-search-demo — Reference ecommerce image search demo. github.com/marqo-ai/local-image-search-demo
• fine-tuning-embedding-models-course — Notebook-based course on embedding model fine-tuning. github.com/marqo-ai/fine-tuning-embedding-models-course

Notes

• The marqo-ai/marqo repository carries a deprecation notice ("Marqo's Open Source project is deprecated and will no longer receive updates") but remains public, Apache 2.0, and at 5,000+ stars / 232 forks. The most recent tag is 2.26.0 (April 2026).
• The runtime engine is FastAPI; the live OpenAPI schema is always available at GET /openapi.json with Swagger UI at GET /docs on the running container.
• Marqo Cloud (https://api.marqo.ai) preserves API parity with the open-source engine and adds bearer-token authentication.
• Sibling repos — py-marqo, marqo-instantsearch-client, terraform-provider-marqo, marqo-base, ingrain_server, GCL, marqo-FashionCLIP, marqo-ecommerce-embeddings — remained active through 2025-2026.

Reference Providers

• Anthropic — Claude is the LLM commonly paired with Marqo retrieval for RAG.

Maintainers

FN: Kin Lane

Email: kin@apievangelist.com