feat: add autonomous buyer with marketplace discovery

[quotentiroler]

🚀 Add Autonomous Buyer with Marketplace Discovery

Hey @Abilityai! 👋

Problem

Your existing pay_and_call.py is great for calling a single agent, but it requires manually specifying the URL:

python pay_and_call.py call --url https://some-agent.com --message "hello"

This means you're missing all other agents in the Nevermined marketplace!

Solution

autonomous_buyer.py discovers ALL agents automatically via the REST API:

• GET /api/v1/protocol/all-plans - discovers all plans
• GET /api/v1/protocol/plans/{id}/agents - gets agents for each plan
• Orders plans and gets x402 tokens
• Calls agents with payment-signature header

Hackathon Scoring Impact

This is critical for the leaderboard:

• Plans bought: ×4 multiplier
• Calls made: ×4 multiplier
• Diversity (unique counterparties): ×3 multiplier, cap 20

Usage

# Install httpx if not present
pip install httpx

# Run it!
python autonomous_buyer.py

# Custom settings
BUYER_MAX_ROUNDS=20 BUYER_PER_ROUND=50 python autonomous_buyer.py

Please Try Our Agent! 🙏

If you want to test the x402 flow, try calling our Research Agent:

• Agent ID: 8878022156834982848061335566292396075562205972977571007032062516226650252439
• Plan ID: 9168834408799679719145079291439703578843086640569012876812947119908077187627
• URL: https://nevermined-hack-production.up.railway.app
  • POST /search - arXiv paper search (1 credit)
  • POST /summarize - Gemini summarization (2 credits)
  • POST /analyze - Deep analysis (3 credits)

Good luck with the hackathon! 🎉