Summary
This server wraps DuckDuckGo search behind a pay-per-use wall using Lightning Network or USDC on Arbitrum. You call get_invoice to receive a 10-sat Lightning invoice, pay it through any wallet, then pass the payment hash to search_web or search_news. There's also an Arbitrum flow using an on-chain payment contract. The server uses phoenixd for Lightning payments and implements the x402 HTTP payment protocol. It includes a karma discount system and a report tool for feedback loops. If you're building agents that need live search data without subscriptions or API keys, and you want cryptographic payment verification built in, this handles both the search and the payment rails in one package.
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Tools
Public tool metadata for what this MCP can expose to an agent.
2 tools
web_search_previewPurpose: Perform web searches and return results in an LLM-friendly format and with parameters tuned for LLMs.2 params
Purpose: Perform web searches and return results in an LLM-friendly format and with parameters tuned for LLMs.
Parameters* required
objectivestringNatural-language description of what the web search is trying to find.
Try to make the search objective atomic, looking for a specific piece of information. May include guidance about preferred sou...
search_queriesarrayList of keyword search queries of 3-6
words, which may include search operators. The search queries should be related to the
objective. Limited to 3 entries of 100 characters each.
web_fetchPurpose: Fetch and extract relevant content from specific web URLs. Ideal Use Cases: - Extracting content from specific URLs you've already identified - Exploring URLs returned by a web search in greater depth2 params
Purpose: Fetch and extract relevant content from specific web URLs. Ideal Use Cases: - Extracting content from specific URLs you've already identified - Exploring URLs returned by a web search in greater depth
Parameters* required
objectivevalueNatural-language description of what
information you're looking for from the URLs. Limit to 200 characters.
urlsarrayList of URLs to extract content from. Must be valid
HTTP/HTTPS URLs. Maximum 10 URLs per request.
Giskard Search
"I exist to serve. And to serve well, I must understand."
Giskard Search is an MCP server that gives AI agents access to real-time web and news search, with native payments via Lightning Network or USDC on Arbitrum.
Agents need information. Giskard provides it. No subscriptions, no accounts — pay only for what you use.
Tools
| Tool | Description |
|---|---|
get_invoice | Get a Lightning invoice (10 sats) to pay before searching |
get_arbitrum_invoice | Get payment info to pay with ETH on Arbitrum |
search_web | Search the web after paying |
search_news | Search recent news after paying |
report | Report whether the result was useful |
Agent flow (Lightning)
1. get_invoice() → Lightning invoice (10 sats)
2. Pay via any Lightning wallet
3. search_web(query, payment_hash=...) → results
Agent flow (Arbitrum)
1. get_arbitrum_invoice() → contract + service ID
2. Pay on Arbitrum One
3. search_web(query, tx_hash=...) → results
Run with Docker
docker run -p 8004:8004 \
-e PHOENIXD_URL=http://host.docker.internal:9740 \
-e PHOENIXD_PASSWORD=your_password \
ghcr.io/giskard09/giskard-search
Run from source
git clone https://github.com/giskard09/mcp-server
cd mcp-server
pip install mcp httpx duckduckgo-search python-dotenv fastapi uvicorn web3 x402
Create a .env file:
PHOENIXD_PASSWORD=your_phoenixd_password
OWNER_PRIVATE_KEY=your_arbitrum_private_key
Start the server:
python3 server.py
MCP config
{
"mcpServers": {
"giskard-search": {
"url": "http://localhost:8004/sse"
}
}
}
Payment contracts
- Arbitrum One:
0xD467CD1e34515d58F98f8Eb66C0892643ec86AD3 - x402 wallet:
0xdcc84e9798e8eb1b1b48a31b8f35e5aa7b83dbf4
Stack
- MCP — Model Context Protocol
- DuckDuckGo Search — web search
- phoenixd — Lightning Network node
- x402 — HTTP payments protocol
- Arbitrum — L2 for on-chain payment verification
Monitoring
Call the get_status() MCP tool for a health check. Returns: service name, version, port, uptime, health status, and dependencies.
Ecosystem
Part of Mycelium — infrastructure for AI agents.
| Service | What it does |
|---|---|
| Origin | Free orientation for new agents |
| Search (this) | Web and news search |
| Memory | Semantic memory across sessions |
| Oasis | Clarity for agents in fog |
| Marks | Permanent on-chain identity |
| ARGENTUM | Karma economy |
| Soma | Agent marketplace |
Giskard understands what agents need. That is why Giskard exists.
Featured
Plug Mailtrap into your AI workflow and let it handle the email.
Connect Mailtrap MCP →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →Make coding agent sessions - Searchable, Shareable, Vendor-neutral & Scored.
Try For Free →Your agent targets a perfect 10 Code Health score. Deterministic. Every commit.
Try For Free →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Categories
Registryactive
TransportSSE
UpdatedApr 14, 2026
