OpenSERP

OpenSERP is a free, open-source SERP API and CLI for Google, Yandex, Baidu, Bing, DuckDuckGo, and Ecosia.

No API keys, no per-search billing: one command gives you live, structured search results on localhost - including engines the paid APIs don't cover. Use it as a search tool for LLMs and agents, or as a backend for SEO rank tracking. If you'd rather not run infrastructure, there is a hosted version with the same API.

Features

• Dedicated endpoints for six engines, same JSON schema across all of them
• Megasearch - one query across several engines at once, merged and deduped
• URL extraction - search results plus clean markdown of the target pages in one call
• SERP features: AI summaries, answer boxes, people-also-ask, related searches
• Image search, filters (language, date range, file type, site), JSON/Markdown/Text/NdJSON output
• Proxies, cache, resilient mode, prebuilt Docker images

Quick Start

Docker

Prebuilt images are published to docker hub: karust/openserp.

# Run the API server via prebuilt image
docker run --rm -p 127.0.0.1:7000:7000 karust/openserp:latest serve -a 0.0.0.0 -p 7000

# Or
docker compose up

Go install

go install github.com/karust/openserp@latest
openserp search duckduckgo "open source serp api" --format markdown

From Source

git clone https://github.com/karust/openserp.git
cd openserp
go build -o openserp .
./openserp serve

First request

# mode=any returns the first engine that responds
curl "http://127.0.0.1:7000/mega/search?engines=bing,google&text=golang+vs+rust&extract=1&mode=any"

Example JSON response

{
  "query": {
    "text": "golang vs rust",
    "engines_requested": ["bing", "google"]
  },
  "meta": {
    "request_id": "019ecdc0-a66d-79a4-9d2b-9e9b480d495e",
    "requested_at": "2026-06-16T00:06:55Z",
    "took_ms": 720,
    "engines_responded": ["bing"],
    "engines_failed": [],
    "version": "2.1"
  },
  "results": [
    {
      "id": "s_5a8273f16b19ab64",
      "rank": 1,
      "type": "organic",
      "title": "The Go Programming Language",
      "url": "https://go.dev/",
      "display_url": "go.dev",
      "snippet": "Get Started Playground Tour Stack Overflow Help Packages Standard Library …",
      "domain": "go.dev",
      "favicon": "https://go.dev/favicon.ico",
      "position": {
        "absolute": 1
      },
      "engine": "bing",
      "domain_info": {
        "tld": "dev",
        "sld": "go",
        "category": ""
      },
      "extracted": {
        "title": "Build simple, secure, scalable systems with Go",
        "format": "markdown",
        "content": "## Build simple, secure, scalable systems with Go\n\n\n\n- “At the time, no single team member knew Go, but **within a month, everyone was writing in Go** and we were building out the endpoints. ........",
        "mode_used": "fast",
        "fetched_at": "2026-06-16T00:06:56Z"
      }
    },
    {
      "id": "s_1a364ebcb3035539",
      "rank": 2,
      "type": "organic",
      "title": "Go (programming language) - Wikipedia",
      "url": "https://en.wikipedia.org/wiki/Go_(programming_language)",
      "display_url": "en.wikipedia.org › wiki › Go_(programming_language)",
      "snippet": "In Go's package system, each package has a path (e.g., \"compress/bzip2\" or \"golang.org/x/net/html\") and a name (e.g., bzip2 or html). …",
      "domain": "en.wikipedia.org",
      "favicon": "https://en.wikipedia.org/favicon.ico",
      "position": {
        "absolute": 2
      },
      "engine": "bing",
      "domain_info": {
        "tld": "org",
        "sld": "wikipedia",
        "category": ""
      },
      "classification": {
        "content_type": "article",
        "source_hint": "encyclopedia"
      }
    },
    ...
  ],
  "serp_features": [],
  "pagination": {
    "page": 1,
    "has_more": false,
    "next_start": 10
  },
  "clusters": [
    {
      "id": "c_f20b23a020101dce",
      "canonical_url": "https://go.dev/",
      "domain": "go.dev",
      "title": "The Go Programming Language",
      "occurrences": [
        {
          "engine": "bing",
          "rank": 1,
          "result_id": "s_5a8273f16b19ab64"
        }
      ],
      "engines_count": 1,
      "best_rank": 1,
      "score": 0.5
    },
    ...
  ]
}

SDKs & Examples

Official client packages. Each works against your self-hosted server (set baseUrl) or the hosted API (set apiKey):

Type	Package	Source	Install
JavaScript / TypeScript SDK	@openserp/sdk	openserpapi/sdk-js	npm install @openserp/sdk
Python SDK	openserp	openserpapi/sdk-python	pip install openserp
MCP server (AI agents)	@openserp/mcp	openserpapi/mcp	npx @openserp/mcp
n8n community node	@openserp/n8n-nodes-openserp	openserpapi/n8n	Install via n8n community nodes

See examples for smal